Renaming Cba into Bac.

23 files changed, 6522 insertions, 610 deletions

diff --git a/src/base/bac/bac.c b/src/base/bac/bac.c
new file mode 100644
index 00000000..fdbee7b7
--- /dev/null
+++ b/src/base/bac/bac.c
@@ -0,0 +1,52 @@
+/**CFile****************************************************************
+
+  FileName    [bac.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Verilog parser.]
+
+  Synopsis    [Parses several flavors of word-level Verilog.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bac.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/bac/bac.h b/src/base/bac/bac.h
new file mode 100644
index 00000000..27792363
--- /dev/null
+++ b/src/base/bac/bac.h
@@ -0,0 +1,1017 @@
+/**CFile****************************************************************
+
+  FileName    [bac.h]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [External declarations.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bac.h,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#ifndef ABC__base__bac__bac_h
+#define ABC__base__bac__bac_h
+
+////////////////////////////////////////////////////////////////////////
+///                          INCLUDES                                ///
+////////////////////////////////////////////////////////////////////////
+
+#include "aig/gia/gia.h"
+#include "misc/extra/extra.h"
+#include "misc/util/utilNam.h"
+
+////////////////////////////////////////////////////////////////////////
+///                         PARAMETERS                               ///
+////////////////////////////////////////////////////////////////////////
+
+ABC_NAMESPACE_HEADER_START 
+
+////////////////////////////////////////////////////////////////////////
+///                         BASIC TYPES                              ///
+////////////////////////////////////////////////////////////////////////
+
+// network objects
+typedef enum { 
+    BAC_OBJ_NONE = 0,  // 0:  unused
+    BAC_OBJ_PI,        // 1:  input
+    BAC_OBJ_PO,        // 2:  output
+    BAC_OBJ_BI,        // 3:  box input
+    BAC_OBJ_BO,        // 4:  box output
+    BAC_OBJ_BOX,       // 5:  box
+
+    BAC_BOX_CF,   
+    BAC_BOX_CT,   
+    BAC_BOX_CX,   
+    BAC_BOX_CZ,   
+    BAC_BOX_BUF,  
+    BAC_BOX_INV,  
+    BAC_BOX_AND,  
+    BAC_BOX_NAND, 
+    BAC_BOX_OR,   
+    BAC_BOX_NOR,  
+    BAC_BOX_XOR,  
+    BAC_BOX_XNOR, 
+    BAC_BOX_SHARP,
+    BAC_BOX_SHARPL,
+    BAC_BOX_MUX,  
+    BAC_BOX_MAJ,  
+
+    BAC_BOX_RAND,
+    BAC_BOX_RNAND,
+    BAC_BOX_ROR,
+    BAC_BOX_RNOR,
+    BAC_BOX_RXOR,
+    BAC_BOX_RXNOR,
+
+    BAC_BOX_LAND,
+    BAC_BOX_LNAND,
+    BAC_BOX_LOR,
+    BAC_BOX_LNOR,
+    BAC_BOX_LXOR,
+    BAC_BOX_LXNOR,
+
+    BAC_BOX_NMUX,  
+    BAC_BOX_SEL,
+    BAC_BOX_PSEL,
+    BAC_BOX_ENC,
+    BAC_BOX_PENC,
+    BAC_BOX_DEC,
+    BAC_BOX_EDEC,
+
+    BAC_BOX_ADD,
+    BAC_BOX_SUB,
+    BAC_BOX_MUL,
+    BAC_BOX_DIV,
+    BAC_BOX_MOD,
+    BAC_BOX_REM,
+    BAC_BOX_POW,
+    BAC_BOX_MIN,
+    BAC_BOX_ABS,
+
+    BAC_BOX_LTHAN,
+    BAC_BOX_LETHAN,
+    BAC_BOX_METHAN,
+    BAC_BOX_MTHAN,
+    BAC_BOX_EQU,
+    BAC_BOX_NEQU,
+
+    BAC_BOX_SHIL,
+    BAC_BOX_SHIR,
+    BAC_BOX_ROTL,
+    BAC_BOX_ROTR,
+
+    BAC_BOX_GATE,  
+    BAC_BOX_LUT,  
+    BAC_BOX_ASSIGN,  
+
+    BAC_BOX_TRI,
+    BAC_BOX_RAM,
+    BAC_BOX_RAMR,
+    BAC_BOX_RAMW,
+    BAC_BOX_RAMWC,
+    BAC_BOX_RAMBOX,
+
+    BAC_BOX_LATCH,
+    BAC_BOX_LATCHRS,
+    BAC_BOX_DFF,
+    BAC_BOX_DFFRS,
+
+    BAC_BOX_UNKNOWN   // 67
+} Bac_ObjType_t; 
+
+
+// name types
+typedef enum { 
+    BAC_NAME_BIN = 0,        // 0:  binary variable
+    BAC_NAME_WORD,           // 1:  first bit of word-level variable
+    BAC_NAME_INFO,           // 2:  first bit of special variable
+    BAC_NAME_INDEX,          // 3:  index of word-level variable
+} Bac_NameType_t; 
+
+
+typedef struct Bac_Ntk_t_ Bac_Ntk_t;
+typedef struct Bac_Man_t_ Bac_Man_t;
+
+// network
+struct Bac_Ntk_t_
+{
+    Bac_Man_t *  pDesign;  // design
+    int          NameId;   // name ID
+    int          iCopy;    // copy module
+    int          iBoxNtk;  // instance network ID
+    int          iBoxObj;  // instance object ID
+    int          Count;    // object counter
+    int          Mark;     // visit mark 
+    // interface
+    Vec_Int_t    vInputs;  // inputs 
+    Vec_Int_t    vOutputs; // outputs
+    Vec_Int_t    vInfo;    // input/output/wire info
+    // object attributes
+    Vec_Str_t    vType;    // types     
+    Vec_Int_t    vFanin;   // fanin
+    Vec_Int_t    vIndex;   // index
+    Vec_Int_t    vName;    // original NameId or InstId
+    Vec_Int_t    vFanout;  // fanout
+    Vec_Int_t    vCopy;    // copy
+    // other
+    Vec_Int_t    vArray;
+    Vec_Int_t    vArray2;
+};
+
+// design
+struct Bac_Man_t_
+{
+    // design names
+    char *       pName;    // design name
+    char *       pSpec;    // spec file name
+    Abc_Nam_t *  pStrs;    // string manager
+    Abc_Nam_t *  pMods;    // module name manager
+    // internal data
+    int          iRoot;    // root network
+    int          nNtks;    // number of current networks
+    Bac_Ntk_t *  pNtks;    // networks
+    // user data
+    Vec_Str_t *  vOut;     
+    Vec_Str_t *  vOut2;     
+    Vec_Int_t    vBuf2RootNtk;
+    Vec_Int_t    vBuf2RootObj;
+    Vec_Int_t    vBuf2LeafNtk;
+    Vec_Int_t    vBuf2LeafObj;
+    void *       pMioLib;
+    void **      ppGraphs;
+    int          ElemGates[4];
+    char *       pPrimNames[BAC_BOX_UNKNOWN];
+    char *       pPrimSymbs[BAC_BOX_UNKNOWN];
+};
+
+static inline char *         Bac_ManName( Bac_Man_t * p )                    { return p->pName;                                                                            }
+static inline char *         Bac_ManSpec( Bac_Man_t * p )                    { return p->pSpec;                                                                            }
+static inline int            Bac_ManNtkNum( Bac_Man_t * p )                  { return p->nNtks;                                                                            }
+static inline int            Bac_ManPrimNum( Bac_Man_t * p )                 { return Abc_NamObjNumMax(p->pMods) - Bac_ManNtkNum(p);                                       }
+static inline int            Bac_ManNtkIsOk( Bac_Man_t * p, int i )          { return i > 0 && i <= Bac_ManNtkNum(p);                                                      }
+static inline Bac_Ntk_t *    Bac_ManNtk( Bac_Man_t * p, int i )              { return Bac_ManNtkIsOk(p, i) ? p->pNtks + i : NULL;                                          }
+static inline int            Bac_ManNtkFindId( Bac_Man_t * p, char * pName ) { return Abc_NamStrFind(p->pMods, pName);                                                     }
+static inline Bac_Ntk_t *    Bac_ManNtkFind( Bac_Man_t * p, char * pName )   { return Bac_ManNtk( p, Bac_ManNtkFindId(p, pName) );                                         }
+static inline Bac_Ntk_t *    Bac_ManRoot( Bac_Man_t * p )                    { return Bac_ManNtk(p, p->iRoot);                                                             }
+static inline char *         Bac_ManStr( Bac_Man_t * p, int i )              { return Abc_NamStr(p->pStrs, i);                                                             }
+static inline int            Bac_ManStrId( Bac_Man_t * p, char * pStr )      { return Abc_NamStrFind(p->pStrs, pStr);                                                      }
+static inline char *         Bac_ManPrimName( Bac_Man_t * p, Bac_ObjType_t Type ) { return p->pPrimNames[Type];                                                            }
+static inline char *         Bac_ManPrimSymb( Bac_Man_t * p, Bac_ObjType_t Type ) { return p->pPrimSymbs[Type];                                                            }
+
+static inline int            Bac_NtkId( Bac_Ntk_t * p )                      { int i = p - p->pDesign->pNtks; assert(Bac_ManNtkIsOk(p->pDesign, i)); return i;             }
+static inline Bac_Man_t *    Bac_NtkMan( Bac_Ntk_t * p )                     { return p->pDesign;                                                                          }
+static inline int            Bac_NtkNameId( Bac_Ntk_t * p )                  { return p->NameId;                                                                           }
+static inline char *         Bac_NtkName( Bac_Ntk_t * p )                    { return Bac_ManStr(p->pDesign, Bac_NtkNameId(p));                                            }
+static inline int            Bac_NtkCopy( Bac_Ntk_t * p )                    { return p->iCopy;                                                                            }
+static inline Bac_Ntk_t *    Bac_NtkCopyNtk(Bac_Man_t * pNew, Bac_Ntk_t * p) { return Bac_ManNtk(pNew, Bac_NtkCopy(p));                                                    }
+static inline void           Bac_NtkSetCopy( Bac_Ntk_t * p, int i )          { assert(p->iCopy == -1); p->iCopy = i;                                                       }
+
+static inline int            Bac_NtkObjNum( Bac_Ntk_t * p )                  { return Vec_StrSize(&p->vType);                                                              }
+static inline int            Bac_NtkObjNumAlloc( Bac_Ntk_t * p )             { return Vec_StrCap(&p->vType);                                                               }
+static inline int            Bac_NtkPiNum( Bac_Ntk_t * p )                   { return Vec_IntSize(&p->vInputs);                                                            }
+static inline int            Bac_NtkPoNum( Bac_Ntk_t * p )                   { return Vec_IntSize(&p->vOutputs);                                                           }
+static inline int            Bac_NtkPioNum( Bac_Ntk_t * p )                  { return Bac_NtkPiNum(p) + Bac_NtkPoNum(p);                                                   }
+static inline int            Bac_NtkPiNumAlloc( Bac_Ntk_t * p )              { return Vec_IntCap(&p->vInputs);                                                             }
+static inline int            Bac_NtkPoNumAlloc( Bac_Ntk_t * p )              { return Vec_IntCap(&p->vOutputs);                                                            }
+static inline int            Bac_NtkBiNum( Bac_Ntk_t * p )                   { return Vec_StrCountEntryLit(&p->vType, (char)BAC_OBJ_BI);                                   }
+static inline int            Bac_NtkBoNum( Bac_Ntk_t * p )                   { return Vec_StrCountEntryLit(&p->vType, (char)BAC_OBJ_BO);                                   }
+static inline int            Bac_NtkCiNum( Bac_Ntk_t * p )                   { return Bac_NtkPiNum(p) + Bac_NtkBoNum(p);                                                   }
+static inline int            Bac_NtkCoNum( Bac_Ntk_t * p )                   { return Bac_NtkPoNum(p) + Bac_NtkBiNum(p);                                                   }
+static inline int            Bac_NtkBoxNum( Bac_Ntk_t * p )                  { return Bac_NtkObjNum(p) - Vec_StrCountSmallerLit(&p->vType, (char)BAC_OBJ_BOX);             }
+static inline int            Bac_NtkPrimNum( Bac_Ntk_t * p )                 { return Vec_StrCountLargerLit(&p->vType, (char)BAC_OBJ_BOX);                                 }
+static inline int            Bac_NtkUserNum( Bac_Ntk_t * p )                 { return Vec_StrCountEntryLit(&p->vType, (char)BAC_OBJ_BOX);                                  }
+ 
+static inline int            Bac_NtkPi( Bac_Ntk_t * p, int i )               { return Vec_IntEntry(&p->vInputs, i);                                                        }
+static inline int            Bac_NtkPo( Bac_Ntk_t * p, int i )               { return Vec_IntEntry(&p->vOutputs, i);                                                       }
+static inline char *         Bac_NtkStr( Bac_Ntk_t * p, int i )              { return Bac_ManStr(p->pDesign, i);                                                           }
+static inline Bac_Ntk_t *    Bac_NtkHostNtk( Bac_Ntk_t * p )                 { return p->iBoxNtk > 0 ? Bac_ManNtk(p->pDesign, p->iBoxNtk) : NULL;                          }
+static inline int            Bac_NtkHostObj( Bac_Ntk_t * p )                 { return p->iBoxObj;                                                                          }
+static inline void           Bac_NtkSetHost( Bac_Ntk_t * p, int n, int i )   { assert(p->iBoxNtk == -1); p->iBoxNtk = n; p->iBoxObj = i;                                   }
+
+static inline int            Bac_InfoRange( int Beg, int End )               { return End > Beg ? End - Beg + 1 : Beg - End + 1;                                           }
+static inline int            Bac_NtkInfoNum( Bac_Ntk_t * p )                 { return Vec_IntSize(&p->vInfo)/3;                                                            }
+static inline int            Bac_NtkInfoNumAlloc( Bac_Ntk_t * p )            { return Vec_IntCap(&p->vInfo)/3;                                                             }
+static inline int            Bac_NtkInfoType( Bac_Ntk_t * p, int i )         { return Abc_Lit2Att2(Vec_IntEntry(&p->vInfo, 3*i));                                          }
+static inline int            Bac_NtkInfoName( Bac_Ntk_t * p, int i )         { return Abc_Lit2Var2(Vec_IntEntry(&p->vInfo, 3*i));                                          }
+static inline int            Bac_NtkInfoBeg( Bac_Ntk_t * p, int i )          { return Vec_IntEntry(&p->vInfo, 3*i+1);                                                      }
+static inline int            Bac_NtkInfoEnd( Bac_Ntk_t * p, int i )          { return Vec_IntEntry(&p->vInfo, 3*i+2);                                                      }
+static inline int            Bac_NtkInfoRange( Bac_Ntk_t * p, int i )        { int* a = Vec_IntEntryP(&p->vInfo, 3*i); return a[1]>=0 ? Bac_InfoRange( a[1], a[2] ) : 1;   }
+static inline int            Bac_NtkInfoIndex( Bac_Ntk_t * p, int i, int j ) { int* a = Vec_IntEntryP(&p->vInfo, 3*i); assert(a[1]>=0); return a[1]<a[2] ? a[1]+j : a[1]-j;}
+static inline void           Bac_NtkAddInfo( Bac_Ntk_t * p,int i,int b,int e){ Vec_IntPush(&p->vInfo, i); Vec_IntPushTwo(&p->vInfo, b, e);                                 }
+static inline void           Bac_NtkSetInfoName( Bac_Ntk_t * p, int i, int n){ Vec_IntWriteEntry( &p->vInfo, 3*i, n );                                                     }
+
+static inline void           Bac_NtkStartNames( Bac_Ntk_t * p )              { assert(Bac_NtkObjNumAlloc(p)); Vec_IntFill(&p->vName,   Bac_NtkObjNumAlloc(p),  0);         }
+static inline void           Bac_NtkStartFanouts( Bac_Ntk_t * p )            { assert(Bac_NtkObjNumAlloc(p)); Vec_IntFill(&p->vFanout, Bac_NtkObjNumAlloc(p),  0);         }
+static inline void           Bac_NtkStartCopies( Bac_Ntk_t * p )             { assert(Bac_NtkObjNumAlloc(p)); Vec_IntFill(&p->vCopy,   Bac_NtkObjNumAlloc(p), -1);         }
+static inline void           Bac_NtkFreeNames( Bac_Ntk_t * p )               { Vec_IntErase(&p->vName);                                                                    }
+static inline void           Bac_NtkFreeFanouts( Bac_Ntk_t * p )             { Vec_IntErase(&p->vFanout);                                                                  }
+static inline void           Bac_NtkFreeCopies( Bac_Ntk_t * p )              { Vec_IntErase(&p->vCopy);                                                                    }
+static inline int            Bac_NtkHasNames( Bac_Ntk_t * p )                { return p->vName.pArray != NULL;                                                             }
+static inline int            Bac_NtkHasFanouts( Bac_Ntk_t * p )              { return p->vFanout.pArray != NULL;                                                           }
+static inline int            Bac_NtkHasCopies( Bac_Ntk_t * p )               { return p->vCopy.pArray != NULL;                                                             }
+
+static inline int            Bac_TypeIsBox( Bac_ObjType_t Type )             { return Type >= BAC_OBJ_BOX && Type < BAC_BOX_UNKNOWN;                                       }
+static inline Bac_NameType_t Bac_NameType( int n )                           { assert( n ); return (Bac_NameType_t)Abc_Lit2Att2( n );                                      }
+static inline int            Bac_CharIsDigit( char c )                       { return c >= '0' && c <= '9'; }
+
+static inline Bac_ObjType_t  Bac_ObjType( Bac_Ntk_t * p, int i )             { return (Bac_ObjType_t)Abc_Lit2Var((int)(unsigned char)Vec_StrEntry(&p->vType, i));          }
+static inline int            Bac_ObjIsPi( Bac_Ntk_t * p, int i )             { return Bac_ObjType(p, i) == BAC_OBJ_PI;                                                     }
+static inline int            Bac_ObjIsPo( Bac_Ntk_t * p, int i )             { return Bac_ObjType(p, i) == BAC_OBJ_PO;                                                     }
+static inline int            Bac_ObjIsPio( Bac_Ntk_t * p, int i )            { return Bac_ObjIsPi(p, i) || Bac_ObjIsPo(p, i);                                              }
+static inline int            Bac_ObjIsBi( Bac_Ntk_t * p, int i )             { return Bac_ObjType(p, i) == BAC_OBJ_BI;                                                     }
+static inline int            Bac_ObjIsBo( Bac_Ntk_t * p, int i )             { return Bac_ObjType(p, i) == BAC_OBJ_BO;                                                     }
+static inline int            Bac_ObjIsBio( Bac_Ntk_t * p, int i )            { return Bac_ObjIsBi(p, i) || Bac_ObjIsBo(p, i);                                              }
+static inline int            Bac_ObjIsBox( Bac_Ntk_t * p, int i )            { return Bac_TypeIsBox(Bac_ObjType(p, i));                                                    }
+static inline int            Bac_ObjIsBoxUser( Bac_Ntk_t * p, int i )        { return Bac_ObjType(p, i) == BAC_OBJ_BOX;                                                    }
+static inline int            Bac_ObjIsBoxPrim( Bac_Ntk_t * p, int i )        { return Bac_ObjIsBox(p, i) && !Bac_ObjIsBoxUser(p, i);                                       }
+static inline int            Bac_ObjIsGate( Bac_Ntk_t * p, int i )           { return Bac_ObjType(p, i) == BAC_BOX_GATE;                                                   }
+static inline int            Bac_ObjIsCi( Bac_Ntk_t * p, int i )             { return Bac_ObjIsPi(p, i) || Bac_ObjIsBo(p, i);                                              }
+static inline int            Bac_ObjIsCo( Bac_Ntk_t * p, int i )             { return Bac_ObjIsPo(p, i) || Bac_ObjIsBi(p, i);                                              }
+static inline int            Bac_ObjIsCio( Bac_Ntk_t * p, int i )            { return Bac_ObjType(p, i) < BAC_OBJ_BOX;                                                     }
+static inline int            Bac_ObjIsConst( Bac_Ntk_t * p, int i )          { return Bac_ObjType(p, i) >= BAC_BOX_CF && Bac_ObjType(p, i) <= BAC_BOX_CZ;                  }
+static inline int            Bac_ObjIsConstBin( Bac_Ntk_t * p, int i )       { return Bac_ObjType(p, i) == BAC_BOX_CF || Bac_ObjType(p, i) == BAC_BOX_CT;                  }
+
+static inline int            Bac_ObjBit( Bac_Ntk_t * p, int i )              { assert(!Bac_ObjIsBox(p, i)); return Abc_LitIsCompl((int)Vec_StrEntry(&p->vType, i));        }
+static inline void           Bac_ObjSetBit( Bac_Ntk_t * p, int i )           { char *q = Vec_StrArray(&p->vType); assert(!Bac_ObjIsBox(p, i)); q[i] = (char)Abc_LitNot((int)q[i]); }
+static inline int            Bac_ObjFanin( Bac_Ntk_t * p, int i )            { assert(Bac_ObjIsCo(p, i)); return Vec_IntEntry(&p->vFanin, i);                              }
+static inline int            Bac_ObjIndex( Bac_Ntk_t * p, int i )            { assert(Bac_ObjIsCio(p, i)); return Vec_IntEntry(&p->vIndex, i);                             }
+static inline int            Bac_ObjNameInt( Bac_Ntk_t * p, int i )          { assert(!Bac_ObjIsCo(p, i)); return Vec_IntEntry(&p->vName, i);                              }
+static inline int            Bac_ObjName( Bac_Ntk_t * p, int i )             { return Bac_ObjIsCo(p, i) ? Bac_ObjNameInt(p, Bac_ObjFanin(p,i)) : Bac_ObjNameInt(p, i);     }
+static inline Bac_NameType_t Bac_ObjNameType( Bac_Ntk_t * p, int i )         { return Bac_NameType( Bac_ObjName(p, i) );                                                   }
+static inline int            Bac_ObjNameId( Bac_Ntk_t * p, int i )           { return Abc_Lit2Var2( Bac_ObjName(p, i) );                                                   }
+static inline char *         Bac_ObjNameStr( Bac_Ntk_t * p, int i )          { assert(Bac_ObjNameType(p, i) <= BAC_NAME_WORD); return Bac_NtkStr(p, Bac_ObjNameId(p, i));  }
+static inline int            Bac_ObjCopy( Bac_Ntk_t * p, int i )             { return Vec_IntEntry(&p->vCopy, i);                                                          }
+static inline int            Bac_ObjFanout( Bac_Ntk_t * p, int i )           { assert(Bac_ObjIsCi(p, i)); return Vec_IntEntry(&p->vFanout, i);                             }
+static inline int            Bac_ObjNextFanout( Bac_Ntk_t * p, int i )       { assert(Bac_ObjIsCo(p, i)); return Vec_IntEntry(&p->vFanout, i);                             }
+static inline void           Bac_ObjSetFanout( Bac_Ntk_t * p, int i, int x ) { assert(Bac_ObjIsCi(p, i)); Vec_IntSetEntry(&p->vFanout, i, x);                              }
+static inline void           Bac_ObjSetNextFanout( Bac_Ntk_t * p,int i,int x){ assert(Bac_ObjIsCo(p, i)); Vec_IntSetEntry(&p->vFanout, i, x);                              }
+static inline void           Bac_ObjCleanFanin( Bac_Ntk_t * p, int i )       { assert(Bac_ObjFanin(p, i) >= 0 && Bac_ObjIsCo(p, i)); Vec_IntSetEntry( &p->vFanin, i, -1);  }
+static inline void           Bac_ObjSetFanin( Bac_Ntk_t * p, int i, int x )  { assert(Bac_ObjFanin(p, i) == -1 && Bac_ObjIsCo(p, i)); Vec_IntSetEntry( &p->vFanin, i, x);  }
+static inline void           Bac_ObjSetIndex( Bac_Ntk_t * p, int i, int x )  { assert(Bac_ObjIndex(p, i) == -1); Vec_IntSetEntry( &p->vIndex, i, x );                      }
+static inline void           Bac_ObjSetName( Bac_Ntk_t * p, int i, int x )   { assert(Bac_ObjName(p, i) == 0 && !Bac_ObjIsCo(p, i)); Vec_IntSetEntry( &p->vName, i, x );   }
+static inline void           Bac_ObjSetCopy( Bac_Ntk_t * p, int i, int x )   { assert(Bac_ObjCopy(p, i) == -1);  Vec_IntSetEntry( &p->vCopy,  i, x );                      }
+static inline int            Bac_ObjGetConst( Bac_Ntk_t * p, int i )         { assert(Bac_ObjIsCi(p, i)); return Bac_ObjIsBo(p, i) && Bac_ObjIsConst(p, i-1) ? Bac_ObjType(p, i-1) : 0;              }
+
+static inline int            Bac_BoxBiNum( Bac_Ntk_t * p, int i )            { int s = i-1; assert(Bac_ObjIsBox(p, i)); while (--i >= 0               && Bac_ObjIsBi(p, i)) {} return s - i;  }
+static inline int            Bac_BoxBoNum( Bac_Ntk_t * p, int i )            { int s = i+1; assert(Bac_ObjIsBox(p, i)); while (++i < Bac_NtkObjNum(p) && Bac_ObjIsBo(p, i)) {} return i - s;  }
+static inline int            Bac_BoxSize( Bac_Ntk_t * p, int i )             { return 1 + Bac_BoxBiNum(p, i) + Bac_BoxBoNum(p, i);                                         }
+static inline int            Bac_BoxBi( Bac_Ntk_t * p, int b, int i )        { assert(Bac_ObjIsBox(p, b)); return b - 1 - i;                                               }
+static inline int            Bac_BoxBo( Bac_Ntk_t * p, int b, int i )        { assert(Bac_ObjIsBox(p, b)); return b + 1 + i;                                               }
+//static inline int            Bac_BoxBiBox( Bac_Ntk_t * p, int i )            { assert(Bac_ObjIsBi(p, i)); return i + 1 + Bac_ObjIndex(p, i);                               }
+static inline int            Bac_BoxBoBox( Bac_Ntk_t * p, int i )            { assert(Bac_ObjIsBo(p, i)); return i - 1 - Bac_ObjIndex(p, i);                               }
+static inline int            Bac_BoxFanin( Bac_Ntk_t * p, int b, int i )     { return Bac_ObjFanin(p, Bac_BoxBi(p, b, i));                                                 }
+static inline int            Bac_BoxFaninBox( Bac_Ntk_t * p, int b, int i )  { return Bac_BoxBoBox(p, Bac_BoxFanin(p, b, i));                                              }
+static inline int            Bac_BoxBiRange( Bac_Ntk_t * p, int i )          { int s = i; assert(Bac_ObjIsBi(p, i) && !Bac_ObjBit(p, i)); while (--i >= 0               && Bac_ObjIsBi(p, i) && Bac_ObjBit(p, i)) {} return s - i;  }
+static inline int            Bac_BoxBoRange( Bac_Ntk_t * p, int i )          { int s = i; assert(Bac_ObjIsBo(p, i) && !Bac_ObjBit(p, i)); while (++i < Bac_NtkObjNum(p) && Bac_ObjIsBo(p, i) && Bac_ObjBit(p, i)) {} return i - s;  }
+static inline int            Bac_ObjPiRange( Bac_Ntk_t * p, int i )          { int s = i; assert(Bac_ObjIsPi(p, i) && !Bac_ObjBit(p, i)); while (++i < Bac_NtkObjNum(p) && Bac_ObjIsPi(p, i) && Bac_ObjBit(p, i)) {} return i - s;  }
+
+static inline int            Bac_BoxNtkId( Bac_Ntk_t * p, int i )            { assert(Bac_ObjIsBox(p, i)); return Vec_IntEntry(&p->vFanin, i);                             }
+static inline void           Bac_BoxSetNtkId( Bac_Ntk_t * p, int i, int x )  { assert(Bac_ObjIsBox(p, i)&&Bac_ManNtkIsOk(p->pDesign, x));Vec_IntSetEntry(&p->vFanin, i, x);}
+//static inline int            Bac_BoxBiNtkId( Bac_Ntk_t * p, int i )          { assert(Bac_ObjIsBi(p, i)); return Bac_BoxNtkId(p, Bac_BoxBiBox(p, i));                      }
+static inline int            Bac_BoxBoNtkId( Bac_Ntk_t * p, int i )          { assert(Bac_ObjIsBo(p, i)); return Bac_BoxNtkId(p, Bac_BoxBoBox(p, i));                      }
+static inline Bac_Ntk_t *    Bac_BoxNtk( Bac_Ntk_t * p, int i )              { return Bac_ManNtk( p->pDesign, Bac_BoxNtkId(p, i) );                                        }
+//static inline Bac_Ntk_t *    Bac_BoxBiNtk( Bac_Ntk_t * p, int i )            { return Bac_ManNtk( p->pDesign, Bac_BoxBiNtkId(p, i) );                                      }
+static inline Bac_Ntk_t *    Bac_BoxBoNtk( Bac_Ntk_t * p, int i )            { return Bac_ManNtk( p->pDesign, Bac_BoxBoNtkId(p, i) );                                      }
+static inline char *         Bac_BoxNtkName( Bac_Ntk_t * p, int i )          { return Abc_NamStr( p->pDesign->pMods, Bac_BoxNtkId(p, i) );                                 }
+
+////////////////////////////////////////////////////////////////////////
+///                      MACRO DEFINITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                             ITERATORS                            ///
+////////////////////////////////////////////////////////////////////////
+
+#define Bac_ManForEachNtk( p, pNtk, i )                                   \
+    for ( i = 1; (i <= Bac_ManNtkNum(p)) && (((pNtk) = Bac_ManNtk(p, i)), 1); i++ ) 
+
+#define Bac_NtkForEachPi( p, iObj, i )                                    \
+    for ( i = 0; (i < Bac_NtkPiNum(p))  && (((iObj) = Bac_NtkPi(p, i)), 1); i++ ) 
+#define Bac_NtkForEachPo( p, iObj, i )                                    \
+    for ( i = 0; (i < Bac_NtkPoNum(p))  && (((iObj) = Bac_NtkPo(p, i)), 1); i++ ) 
+#define Bac_NtkForEachPoDriver( p, iObj, i )                              \
+    for ( i = 0; (i < Bac_NtkPoNum(p))  && (((iObj) = Bac_ObjFanin(p, Bac_NtkPo(p, i))), 1); i++ ) 
+
+#define Bac_NtkForEachPiMain( p, iObj, i )                                \
+    for ( i = 0; (i < Bac_NtkPiNum(p))  && (((iObj) = Bac_NtkPi(p, i)), 1); i++ )  if ( Bac_ObjBit(p, iObj) ) {} else
+#define Bac_NtkForEachPoMain( p, iObj, i )                                \
+    for ( i = 0; (i < Bac_NtkPoNum(p))  && (((iObj) = Bac_NtkPo(p, i)), 1); i++ )  if ( Bac_ObjBit(p, iObj) ) {} else
+
+#define Bac_NtkForEachObj( p, i )  if ( !Bac_ObjType(p, i) ) {} else      \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) 
+#define Bac_NtkForEachObjType( p, Type, i )                               \
+    for ( i = 0; (i < Bac_NtkObjNum(p))  && (((Type) = Bac_ObjType(p, i)), 1); i++ ) if ( !Type ) {} else
+
+#define Bac_NtkForEachBox( p, i )                                         \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBox(p, i) ) {} else
+#define Bac_NtkForEachBoxUser( p, i )                                     \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBoxUser(p, i) ) {} else
+#define Bac_NtkForEachBoxPrim( p, i )                                     \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBoxPrim(p, i) ) {} else
+
+#define Bac_NtkForEachCi( p, i )                                          \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsCi(p, i) ) {} else
+#define Bac_NtkForEachCo( p, i )                                          \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsCo(p, i) ) {} else
+#define Bac_NtkForEachCio( p, i )                                         \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsCio(p, i) ){} else
+
+#define Bac_NtkForEachBi( p, i )                                          \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBi(p, i) ){} else
+#define Bac_NtkForEachBo( p, i )                                          \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBo(p, i) ){} else
+#define Bac_NtkForEachBio( p, i )                                         \
+    for ( i = 0; (i < Bac_NtkObjNum(p)); i++ ) if ( !Bac_ObjIsBio(p, i) ){} else
+
+#define Bac_BoxForEachBi( p, iBox, iTerm, i )                             \
+    for ( iTerm = iBox - 1, i = 0; iTerm >= 0 && Bac_ObjIsBi(p, iTerm); iTerm--, i++ )
+#define Bac_BoxForEachBo( p, iBox, iTerm, i )                             \
+    for ( iTerm = iBox + 1, i = 0; iTerm < Bac_NtkObjNum(p) && Bac_ObjIsBo(p, iTerm); iTerm++, i++ )
+#define Bac_BoxForEachBiReverse( p, iBox, iTerm, i )                      \
+    for ( i = Bac_BoxBiNum(p, iBox), iTerm = iBox - i--; Bac_ObjIsBi(p, iTerm); iTerm++, i-- )
+
+#define Bac_BoxForEachBiMain( p, iBox, iTerm, i )                         \
+    for ( iTerm = iBox - 1, i = 0; iTerm >= 0 && Bac_ObjIsBi(p, iTerm); iTerm--, i++ )                if ( Bac_ObjBit(p, iTerm) ) {} else
+#define Bac_BoxForEachBoMain( p, iBox, iTerm, i )                         \
+    for ( iTerm = iBox + 1, i = 0; iTerm < Bac_NtkObjNum(p) && Bac_ObjIsBo(p, iTerm); iTerm++, i++ )  if ( Bac_ObjBit(p, iTerm) ) {} else
+
+#define Bac_BoxForEachFanin( p, iBox, iFanin, i )                         \
+    for ( i = 0; iBox - 1 - i >= 0 && Bac_ObjIsBi(p, iBox - 1 - i) && (((iFanin) = Bac_BoxFanin(p, iBox, i)), 1); i++ )
+#define Bac_BoxForEachFaninBox( p, iBox, iFanin, i )                      \
+    for ( i = 0; iBox - 1 - i >= 0 && Bac_ObjIsBi(p, iBox - 1 - i) && (((iFanin) = Bac_BoxFaninBox(p, iBox, i)), 1); i++ )
+
+#define Bac_ObjForEachFanout( p, iCi, iCo )                               \
+    for ( iCo = Bac_ObjFanout(p, iCi); iCo; iCo = Bac_ObjNextFanout(p, iCo) )
+#define Bac_BoxForEachFanoutBox( p, iBox, iCo, iFanBox )                  \
+    for ( assert(Bac_BoxBoNum(p, iBox) == 1), iCo = Bac_ObjFanout(p, Bac_BoxBo(p, iBox, 0)); iCo && ((iFanBox = Bac_BoxBiBox(p, iCo)), 1); iCo = Bac_ObjNextFanout(p, iCo) )
+
+////////////////////////////////////////////////////////////////////////
+///                    FUNCTION DECLARATIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Object APIs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Bac_ObjAlloc( Bac_Ntk_t * p, Bac_ObjType_t Type, int Fanin )
+{
+    int iObj = Bac_NtkObjNum(p);
+    assert( iObj == Vec_IntSize(&p->vFanin) );
+    if ( Type == BAC_OBJ_PI )
+        Vec_IntPush( &p->vInputs, iObj );
+    else if ( Type == BAC_OBJ_PO )
+        Vec_IntPush( &p->vOutputs, iObj );
+    Vec_StrPush( &p->vType, (char)Abc_Var2Lit(Type, 0) );
+    Vec_IntPush( &p->vFanin, Fanin );
+    return iObj;
+}
+static inline int Bac_ObjDup( Bac_Ntk_t * pNew, Bac_Ntk_t * p, int i )
+{
+    int iObj = Bac_ObjAlloc( pNew, Bac_ObjType(p, i), Bac_ObjIsBox(p, i) ? Bac_BoxNtkId(p, i) : -1 );
+    if ( Bac_NtkHasNames(p) && Bac_NtkHasNames(pNew) && !Bac_ObjIsCo(p, i) ) 
+        Bac_ObjSetName( pNew, iObj, Bac_ObjName(p, i) );
+    Bac_ObjSetCopy( p, i, iObj );
+    return iObj;
+}
+static inline int Bac_BoxAlloc( Bac_Ntk_t * p, Bac_ObjType_t Type, int nIns, int nOuts, int iNtk )
+{
+    int i, iObj;
+    for ( i = nIns - 1; i >= 0; i-- )
+        Bac_ObjAlloc( p, BAC_OBJ_BI, -1 );
+    iObj = Bac_ObjAlloc( p, Type, iNtk );
+    for ( i = 0; i < nOuts; i++ )
+        Bac_ObjAlloc( p, BAC_OBJ_BO, -1 );
+    return iObj;
+}
+static inline int Bac_BoxDup( Bac_Ntk_t * pNew, Bac_Ntk_t * p, int iBox )
+{
+    int i, iTerm, iBoxNew;
+    Bac_BoxForEachBiReverse( p, iBox, iTerm, i )
+        Bac_ObjDup( pNew, p, iTerm );
+    iBoxNew = Bac_ObjDup( pNew, p, iBox );
+    if ( Bac_NtkHasNames(p) && Bac_NtkHasNames(pNew) && Bac_ObjName(p, iBox) ) 
+        Bac_ObjSetName( pNew, iBoxNew, Bac_ObjName(p, iBox) );
+    if ( Bac_BoxNtk(p, iBox) )
+        Bac_BoxSetNtkId( pNew, iBoxNew, Bac_NtkCopy(Bac_BoxNtk(p, iBox)) );
+    Bac_BoxForEachBo( p, iBox, iTerm, i )
+        Bac_ObjDup( pNew, p, iTerm );
+    return iBoxNew;
+}
+static inline void Bac_BoxDelete( Bac_Ntk_t * p, int iBox )
+{
+    int iStart = iBox - Bac_BoxBiNum(p, iBox);
+    int i, iStop = iBox + Bac_BoxBoNum(p, iBox);
+    for ( i = iStart; i <= iStop; i++ )
+    {
+        Vec_StrWriteEntry( &p->vType,  i, (char)0 );
+        Vec_IntWriteEntry( &p->vFanin, i, -1 );
+        if ( Bac_NtkHasNames(p) )
+            Vec_IntWriteEntry( &p->vName, i, 0 );
+        if ( Bac_NtkHasFanouts(p) )
+            Vec_IntWriteEntry( &p->vFanout, i, 0 );
+    }
+}
+static inline void Bac_BoxReplace( Bac_Ntk_t * p, int iBox, int * pArray, int nSize )
+{
+    extern void Bac_NtkUpdateFanout( Bac_Ntk_t * p, int iOld, int iNew );
+    int i, Limit = Bac_BoxBoNum(p, iBox);
+    assert( Limit == nSize );
+    for ( i = 0; i < Limit; i++ )
+        Bac_NtkUpdateFanout( p, Bac_BoxBo(p, iBox, i), pArray[i] );
+}
+
+
+static inline Vec_Int_t * Bac_BoxCollectRanges( Bac_Ntk_t * p, int iBox )
+{
+    static Vec_Int_t Bits, * vBits = &Bits;
+    static int pArray[10]; int i, iTerm;
+    assert( !Bac_ObjIsBoxUser(p, iBox) );
+    // initialize array
+    vBits->pArray = pArray;
+    vBits->nSize = 0;
+    vBits->nCap = 10;
+    // iterate through inputs
+    Bac_BoxForEachBiMain( p, iBox, iTerm, i )
+        Vec_IntPush( vBits, Bac_BoxBiRange(p, iTerm) );
+    // iterate through outputs
+    Bac_BoxForEachBoMain( p, iBox, iTerm, i )
+        Vec_IntPush( vBits, Bac_BoxBoRange(p, iTerm) );
+    assert( Vec_IntSize(vBits) < 10 );
+    //Vec_IntPrint( vBits );
+    return vBits;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Prints vector.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline void Vec_StrPrint( Vec_Str_t * p, int fInt )
+{
+    int i;
+    for ( i = 0; i < p->nSize; i++ )
+        if ( fInt )
+            printf( "%d ", (int)p->pArray[i] );
+        else
+            printf( "%c ", p->pArray[i] );
+    printf( "\n" );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Network APIs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline void Bac_NtkAlloc( Bac_Ntk_t * pNew, int NameId, int nIns, int nOuts, int nObjs )
+{
+    int NtkId, fFound;
+    assert( pNew->pDesign != NULL );
+    assert( Bac_NtkPiNum(pNew) == 0 );
+    assert( Bac_NtkPoNum(pNew) == 0 );
+    pNew->NameId  = NameId;
+    pNew->iCopy   = -1;
+    pNew->iBoxNtk = -1;
+    pNew->iBoxObj = -1;
+    Vec_IntGrow( &pNew->vInputs,  nIns );
+    Vec_IntGrow( &pNew->vOutputs, nOuts );
+    Vec_StrGrow( &pNew->vType,    nObjs );
+    Vec_IntGrow( &pNew->vFanin,   nObjs );
+    // check if the network is unique
+    NtkId = Abc_NamStrFindOrAdd( pNew->pDesign->pMods, Bac_NtkStr(pNew, NameId), &fFound );
+    if ( fFound )
+        printf( "Network with name %s already exists.\n", Bac_NtkStr(pNew, NameId) );
+    else
+        assert( NtkId == Bac_NtkId(pNew) );
+}
+static inline void Bac_NtkDup( Bac_Ntk_t * pNew, Bac_Ntk_t * p )
+{
+    int i, iObj;
+    assert( pNew != p );
+    Bac_NtkAlloc( pNew, Bac_NtkNameId(p), Bac_NtkPiNum(p), Bac_NtkPoNum(p), Bac_NtkObjNum(p) );
+    if ( Vec_IntSize(&p->vInfo) )
+        Vec_IntAppend( &pNew->vInfo, &p->vInfo );
+    Bac_NtkStartCopies( p );
+    if ( Bac_NtkHasNames(p) )
+        Bac_NtkStartNames( pNew );
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjDup( pNew, p, iObj );
+    Bac_NtkForEachBox( p, iObj )
+        Bac_BoxDup( pNew, p, iObj );
+    Bac_NtkForEachPo( p, iObj, i )
+        Bac_ObjDup( pNew, p, iObj );
+    Bac_NtkForEachCo( p, iObj )
+        Bac_ObjSetFanin( pNew, Bac_ObjCopy(p, iObj), Bac_ObjCopy(p, Bac_ObjFanin(p, iObj)) );
+    //Bac_NtkFreeCopies( p ); // needed for name transfer and host ntk
+    assert( Bac_NtkObjNum(pNew) == Bac_NtkObjNumAlloc(pNew) );
+}
+static inline void Bac_NtkDupUserBoxes( Bac_Ntk_t * pNew, Bac_Ntk_t * p )
+{
+    int i, iObj;
+    assert( pNew != p );
+    Bac_NtkAlloc( pNew, Bac_NtkNameId(p), Bac_NtkPiNum(p), Bac_NtkPoNum(p), Bac_NtkObjNum(p) + 3*Bac_NtkCoNum(p) );
+    if ( Vec_IntSize(&p->vInfo) )
+        Vec_IntAppend( &pNew->vInfo, &p->vInfo );
+    Bac_NtkStartCopies( p );
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjDup( pNew, p, iObj );
+    Bac_NtkForEachPo( p, iObj, i )
+        Bac_ObjDup( pNew, p, iObj );
+    Bac_NtkForEachBoxUser( p, iObj )
+        Bac_BoxDup( pNew, p, iObj );
+    // connect feed-throughs
+    Bac_NtkForEachCo( p, iObj )
+        if ( Bac_ObjCopy(p, iObj) >= 0 && Bac_ObjCopy(p, Bac_ObjFanin(p, iObj)) >= 0 )
+            Bac_ObjSetFanin( pNew, Bac_ObjCopy(p, iObj), Bac_ObjCopy(p, Bac_ObjFanin(p, iObj)) );
+}
+static inline void Bac_NtkMoveNames( Bac_Ntk_t * pNew, Bac_Ntk_t * p )
+{
+    int i, iBox, iObj;
+    assert( Bac_NtkHasNames(p) );
+    assert( !Bac_NtkHasNames(pNew) );
+    Bac_NtkStartNames( pNew );
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjSetName( pNew, Bac_ObjCopy(p, iObj), Bac_ObjName(p, iObj) );
+    Bac_NtkForEachBoxUser( p, iBox )
+    {
+        Bac_ObjSetName( pNew, Bac_ObjCopy(p, iBox), Bac_ObjName(p, iBox) );
+        Bac_BoxForEachBo( p, iBox, iObj, i )
+            Bac_ObjSetName( pNew, Bac_ObjCopy(p, iObj), Bac_ObjName(p, iObj) );
+    }
+    Bac_NtkForEachBoxUser( p, iBox )
+        Bac_BoxForEachBi( p, iBox, iObj, i )
+            if ( !Bac_ObjName(pNew, Bac_ObjFanin(pNew, Bac_ObjCopy(p, iObj))) )
+                Bac_ObjSetName( pNew, Bac_ObjFanin(pNew, Bac_ObjCopy(p, iObj)), Bac_ObjName(p, iObj) );
+    Bac_NtkForEachPo( p, iObj, i )
+        if ( !Bac_ObjName(pNew, Bac_ObjFanin(pNew, Bac_ObjCopy(p, iObj))) )
+            Bac_ObjSetName( pNew, Bac_ObjFanin(pNew, Bac_ObjCopy(p, iObj)), Bac_ObjName(p, iObj) );
+}
+
+static inline void Bac_NtkFree( Bac_Ntk_t * p )
+{
+    Vec_IntErase( &p->vInputs );
+    Vec_IntErase( &p->vOutputs );
+    Vec_IntErase( &p->vInfo );
+    Vec_StrErase( &p->vType );
+    Vec_IntErase( &p->vFanin );    
+    Vec_IntErase( &p->vIndex );
+    Vec_IntErase( &p->vName );    
+    Vec_IntErase( &p->vFanout );    
+    Vec_IntErase( &p->vCopy );    
+    Vec_IntErase( &p->vArray );    
+    Vec_IntErase( &p->vArray2 );    
+}
+static inline int Bac_NtkMemory( Bac_Ntk_t * p )
+{
+    int nMem = sizeof(Bac_Ntk_t);
+    nMem += (int)Vec_IntMemory(&p->vInputs);
+    nMem += (int)Vec_IntMemory(&p->vOutputs);
+    nMem += (int)Vec_IntMemory(&p->vInfo);
+    nMem += (int)Vec_StrMemory(&p->vType);
+    nMem += (int)Vec_IntMemory(&p->vFanin);
+    nMem += (int)Vec_IntMemory(&p->vIndex);
+    nMem += (int)Vec_IntMemory(&p->vName);
+    nMem += (int)Vec_IntMemory(&p->vFanout);
+    nMem += (int)Vec_IntMemory(&p->vCopy);
+    return nMem;
+}
+static inline void Bac_NtkPrintStats( Bac_Ntk_t * p )
+{
+    printf( "pi =%5d  ",   Bac_NtkPiNum(p) );
+    printf( "pi =%5d  ",   Bac_NtkPoNum(p) );
+    printf( "box =%6d  ",  Bac_NtkBoxNum(p) );
+    printf( "clp =%7d  ",  p->Count );
+    printf( "obj =%7d  ",  Bac_NtkObjNum(p) );
+    printf( "%s ",         Bac_NtkName(p) );
+    if ( Bac_NtkHostNtk(p) > 0 )
+        printf( "-> %s",   Bac_NtkName(Bac_NtkHostNtk(p)) );
+    printf( "\n" );
+}
+static inline void Bac_NtkDeriveIndex( Bac_Ntk_t * p )
+{
+    int i, iObj, iTerm;
+    Vec_IntFill( &p->vIndex, Bac_NtkObjNum(p), -1 );
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjSetIndex( p, iObj, i );
+    Bac_NtkForEachPo( p, iObj, i )
+        Bac_ObjSetIndex( p, iObj, i );
+    Bac_NtkForEachBox( p, iObj )
+    {
+        Bac_BoxForEachBi( p, iObj, iTerm, i )
+            Bac_ObjSetIndex( p, iTerm, i );
+        Bac_BoxForEachBo( p, iObj, iTerm, i )
+            Bac_ObjSetIndex( p, iTerm, i );
+    }
+}
+static inline void Bac_NtkPrint( Bac_Ntk_t * p )
+{
+    int i, Type, Value, Beg, End;
+    printf( "Interface (%d):\n", Bac_NtkInfoNum(p) );
+    Vec_IntForEachEntryTriple( &p->vInfo, Value, Beg, End, i )
+    {
+        printf( "%6d : ", i );
+        printf( "Type =%3d  ", Bac_NtkInfoType(p, i/3) );
+        if ( Beg >= 0 )
+            printf( "[%d:%d]   ", End, Beg );
+        else
+            printf( "        " );
+        printf( "Name =%3d   ", Bac_NtkInfoName(p, i/3) );
+        if ( Bac_NtkInfoName(p, i/3) )
+            printf( "%s", Bac_NtkStr( p, Bac_NtkInfoName(p, i/3) ) );
+        printf( "\n" );
+    }
+    printf( "Objects (%d):\n", Bac_NtkObjNum(p) );
+    Bac_NtkForEachObjType( p, Type, i )
+    {
+        printf( "%6d : ", i );
+        printf( "Type =%3d  ", Type );
+        if ( Bac_ObjIsCo(p, i) )
+            printf( "Fanin =%6d  ", Bac_ObjFanin(p, i) );
+        else if ( Bac_NtkHasNames(p) && Bac_ObjName(p, i) )
+        {
+            printf( "Name  =%6d(%d)  ", Bac_ObjNameId(p, i), Bac_ObjNameType(p, i) );
+            if ( Bac_ObjNameType(p, i) <= BAC_NAME_WORD )
+                printf( "%s", Bac_ObjNameStr(p, i) );
+        }
+        printf( "\n" );
+    }
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    [Manager APIs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline Bac_Man_t * Bac_ManAlloc( char * pFileName, int nNtks )
+{
+    extern void Bac_ManSetupTypes( char ** pNames, char ** pSymbs );
+    Bac_Ntk_t * pNtk; int i;
+    Bac_Man_t * pNew = ABC_CALLOC( Bac_Man_t, 1 );
+    pNew->pName = Extra_FileDesignName( pFileName );
+    pNew->pSpec = Abc_UtilStrsav( pFileName );
+    pNew->pStrs = Abc_NamStart( 1000, 24 );
+    pNew->pMods = Abc_NamStart( 1000, 24 );
+    pNew->iRoot = 1;
+    pNew->nNtks = nNtks;
+    pNew->pNtks = ABC_CALLOC( Bac_Ntk_t, pNew->nNtks + 1 );
+    Bac_ManForEachNtk( pNew, pNtk, i )
+        pNtk->pDesign = pNew;
+    Bac_ManSetupTypes( pNew->pPrimNames, pNew->pPrimSymbs );
+    return pNew;
+}
+static inline Bac_Man_t * Bac_ManStart( Bac_Man_t * p, int nNtks )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_Man_t * pNew = ABC_CALLOC( Bac_Man_t, 1 );
+    pNew->pName = Abc_UtilStrsav( Bac_ManName(p) );
+    pNew->pSpec = Abc_UtilStrsav( Bac_ManSpec(p) );
+    pNew->pStrs = Abc_NamRef( p->pStrs );  
+    pNew->pMods = Abc_NamStart( 1000, 24 );
+    pNew->iRoot = 1;
+    pNew->nNtks = nNtks;
+    pNew->pNtks = ABC_CALLOC( Bac_Ntk_t, nNtks + 1 );
+    Bac_ManForEachNtk( pNew, pNtk, i )
+        pNtk->pDesign = pNew;
+    return pNew;
+}
+static inline Bac_Man_t * Bac_ManDup( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk, * pHost; int i;
+    Bac_Man_t * pNew = Bac_ManStart( p, Bac_ManNtkNum(p) );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkSetCopy( pNtk, i );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkDup( Bac_NtkCopyNtk(pNew, pNtk), pNtk );
+    Bac_ManForEachNtk( p, pNtk, i )
+        if ( (pHost = Bac_NtkHostNtk(pNtk)) )
+            Bac_NtkSetHost( Bac_NtkCopyNtk(pNew, pNtk), Bac_NtkCopy(pHost), Bac_ObjCopy(pHost, Bac_NtkHostObj(pNtk)) );
+    return pNew;
+}
+static inline Bac_Man_t * Bac_ManDupUserBoxes( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk, * pHost; int i;
+    Bac_Man_t * pNew = Bac_ManStart( p, Bac_ManNtkNum(p) );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkSetCopy( pNtk, i );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkDupUserBoxes( Bac_NtkCopyNtk(pNew, pNtk), pNtk );
+    Bac_ManForEachNtk( p, pNtk, i )
+        if ( (pHost = Bac_NtkHostNtk(pNtk)) )
+            Bac_NtkSetHost( Bac_NtkCopyNtk(pNew, pNtk), Bac_NtkCopy(pHost), Bac_ObjCopy(pHost, Bac_NtkHostObj(pNtk)) );
+    return pNew;
+}
+static inline void Bac_ManMoveNames( Bac_Man_t * pNew, Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkMoveNames( Bac_NtkCopyNtk(pNew, pNtk), pNtk );
+}
+
+
+static inline void Bac_ManFree( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkFree( pNtk );
+    Vec_IntErase( &p->vBuf2LeafNtk );
+    Vec_IntErase( &p->vBuf2LeafObj );
+    Vec_IntErase( &p->vBuf2RootNtk );
+    Vec_IntErase( &p->vBuf2RootObj );
+    Abc_NamDeref( p->pStrs );
+    Abc_NamDeref( p->pMods );
+    ABC_FREE( p->pName );
+    ABC_FREE( p->pSpec );
+    ABC_FREE( p->pNtks );
+    ABC_FREE( p );
+}
+static inline int Bac_ManMemory( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    int nMem = sizeof(Bac_Man_t);
+    if ( p->pName )
+    nMem += (int)strlen(p->pName);
+    if ( p->pSpec )
+    nMem += (int)strlen(p->pSpec);
+    nMem += Abc_NamMemUsed(p->pStrs);
+    nMem += Abc_NamMemUsed(p->pMods);
+    Bac_ManForEachNtk( p, pNtk, i )
+        nMem += Bac_NtkMemory( pNtk );
+    return nMem;
+}
+static inline int Bac_ManObjNum( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i, Count = 0;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Count += Bac_NtkObjNum(pNtk);
+    return Count;
+}
+static inline int Bac_ManNodeNum( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i, Count = 0;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Count += Bac_NtkBoxNum( pNtk );
+    return Count;
+}
+static inline int Bac_ManBoxNum_rec( Bac_Ntk_t * p )
+{
+    int iObj, Counter = 0;
+    if ( p->Count >= 0 )
+        return p->Count;
+    Bac_NtkForEachBox( p, iObj )
+        Counter += Bac_ObjIsBoxUser(p, iObj) ? Bac_ManBoxNum_rec( Bac_BoxNtk(p, iObj) ) : 1;
+    return (p->Count = Counter);
+}
+static inline int Bac_ManBoxNum( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        pNtk->Count = -1;
+    return Bac_ManBoxNum_rec( Bac_ManRoot(p) );
+}
+static inline void Bac_ManPrintStats( Bac_Man_t * p, int nModules, int fVerbose )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_Ntk_t * pRoot = Bac_ManRoot( p );
+    printf( "%-12s : ",   Bac_ManName(p) );
+    printf( "pi =%5d  ",  Bac_NtkPiNum(pRoot) );
+    printf( "po =%5d  ",  Bac_NtkPoNum(pRoot) );
+    printf( "pri =%4d  ", Bac_ManPrimNum(p) );
+    printf( "mod =%6d  ", Bac_ManNtkNum(p) );
+    printf( "box =%7d  ", Bac_ManNodeNum(p) );
+    printf( "obj =%7d  ", Bac_ManObjNum(p) );
+    printf( "mem =%6.3f MB", 1.0*Bac_ManMemory(p)/(1<<20) );
+    printf( "\n" );
+    Bac_ManBoxNum( p );
+    Bac_ManForEachNtk( p, pNtk, i )
+    {
+        if ( i == nModules+1 )
+            break;
+        printf( "Module %5d : ", i );
+        Bac_NtkPrintStats( pNtk );
+    }
+}
+
+
+
+/**Function*************************************************************
+
+  Synopsis    [Other APIs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline Bac_ObjType_t Ptr_SopToType( char * pSop )
+{
+    if ( !strcmp(pSop, " 0\n") )         return BAC_BOX_CF;
+    if ( !strcmp(pSop, " 1\n") )         return BAC_BOX_CT;
+    if ( !strcmp(pSop, "1 1\n") )        return BAC_BOX_BUF;
+    if ( !strcmp(pSop, "0 1\n") )        return BAC_BOX_INV;
+    if ( !strcmp(pSop, "11 1\n") )       return BAC_BOX_AND;
+    if ( !strcmp(pSop, "00 1\n") )       return BAC_BOX_NOR;
+    if ( !strcmp(pSop, "00 0\n") )       return BAC_BOX_OR;
+    if ( !strcmp(pSop, "-1 1\n1- 1\n") ) return BAC_BOX_OR;
+    if ( !strcmp(pSop, "1- 1\n-1 1\n") ) return BAC_BOX_OR;
+    if ( !strcmp(pSop, "01 1\n10 1\n") ) return BAC_BOX_XOR;
+    if ( !strcmp(pSop, "10 1\n01 1\n") ) return BAC_BOX_XOR;
+    if ( !strcmp(pSop, "11 1\n00 1\n") ) return BAC_BOX_XNOR;
+    if ( !strcmp(pSop, "00 1\n11 1\n") ) return BAC_BOX_XNOR;
+    if ( !strcmp(pSop, "10 1\n") )       return BAC_BOX_SHARP;
+    if ( !strcmp(pSop, "01 1\n") )       return BAC_BOX_SHARPL;
+    assert( 0 );
+    return BAC_OBJ_NONE;
+}
+static inline char * Ptr_SopToTypeName( char * pSop )
+{
+    if ( !strcmp(pSop, " 0\n") )         return "BAC_BOX_C0";
+    if ( !strcmp(pSop, " 1\n") )         return "BAC_BOX_C1";
+    if ( !strcmp(pSop, "1 1\n") )        return "BAC_BOX_BUF";
+    if ( !strcmp(pSop, "0 1\n") )        return "BAC_BOX_INV";
+    if ( !strcmp(pSop, "11 1\n") )       return "BAC_BOX_AND";
+    if ( !strcmp(pSop, "00 1\n") )       return "BAC_BOX_NOR";
+    if ( !strcmp(pSop, "00 0\n") )       return "BAC_BOX_OR";
+    if ( !strcmp(pSop, "-1 1\n1- 1\n") ) return "BAC_BOX_OR";
+    if ( !strcmp(pSop, "1- 1\n-1 1\n") ) return "BAC_BOX_OR";
+    if ( !strcmp(pSop, "01 1\n10 1\n") ) return "BAC_BOX_XOR";
+    if ( !strcmp(pSop, "10 1\n01 1\n") ) return "BAC_BOX_XOR";
+    if ( !strcmp(pSop, "11 1\n00 1\n") ) return "BAC_BOX_XNOR";
+    if ( !strcmp(pSop, "00 1\n11 1\n") ) return "BAC_BOX_XNOR";
+    if ( !strcmp(pSop, "10 1\n") )       return "BAC_BOX_SHARP";
+    if ( !strcmp(pSop, "01 1\n") )       return "BAC_BOX_SHARPL";
+    assert( 0 );
+    return NULL;
+}
+static inline char * Ptr_TypeToName( Bac_ObjType_t Type )
+{
+    if ( Type == BAC_BOX_CF )    return "const0";
+    if ( Type == BAC_BOX_CT )    return "const1";
+    if ( Type == BAC_BOX_CX )    return "constX";
+    if ( Type == BAC_BOX_CZ )    return "constZ";
+    if ( Type == BAC_BOX_BUF )   return "buf";
+    if ( Type == BAC_BOX_INV )   return "not";
+    if ( Type == BAC_BOX_AND )   return "and";
+    if ( Type == BAC_BOX_NAND )  return "nand";
+    if ( Type == BAC_BOX_OR )    return "or";
+    if ( Type == BAC_BOX_NOR )   return "nor";
+    if ( Type == BAC_BOX_XOR )   return "xor";
+    if ( Type == BAC_BOX_XNOR )  return "xnor";
+    if ( Type == BAC_BOX_MUX )   return "mux";
+    if ( Type == BAC_BOX_MAJ )   return "maj";
+    if ( Type == BAC_BOX_SHARP ) return "sharp";
+    if ( Type == BAC_BOX_SHARPL) return "sharpl";
+    assert( 0 );
+    return "???";
+}
+static inline char * Ptr_TypeToSop( Bac_ObjType_t Type )
+{
+    if ( Type == BAC_BOX_CF )    return " 0\n";
+    if ( Type == BAC_BOX_CT )    return " 1\n";
+    if ( Type == BAC_BOX_CX )    return " 0\n";
+    if ( Type == BAC_BOX_CZ )    return " 0\n";
+    if ( Type == BAC_BOX_BUF )   return "1 1\n";
+    if ( Type == BAC_BOX_INV )   return "0 1\n";
+    if ( Type == BAC_BOX_AND )   return "11 1\n";
+    if ( Type == BAC_BOX_NAND )  return "11 0\n";
+    if ( Type == BAC_BOX_OR )    return "00 0\n";
+    if ( Type == BAC_BOX_NOR )   return "00 1\n";
+    if ( Type == BAC_BOX_XOR )   return "01 1\n10 1\n";
+    if ( Type == BAC_BOX_XNOR )  return "00 1\n11 1\n";
+    if ( Type == BAC_BOX_SHARP ) return "10 1\n";
+    if ( Type == BAC_BOX_SHARPL) return "01 1\n";
+    if ( Type == BAC_BOX_MUX )   return "11- 1\n0-1 1\n";
+    if ( Type == BAC_BOX_MAJ )   return "11- 1\n1-1 1\n-11 1\n";
+    assert( 0 );
+    return "???";
+}
+
+/*=== bacCom.c ===============================================================*/
+extern void          Abc_FrameImportPtr( Vec_Ptr_t * vPtr );
+extern Vec_Ptr_t *   Abc_FrameExportPtr();
+
+/*=== bacBlast.c =============================================================*/
+extern int           Bac_NtkBuildLibrary( Bac_Man_t * p );
+extern Gia_Man_t *   Bac_ManExtract( Bac_Man_t * p, int fBuffers, int fVerbose );
+extern Bac_Man_t *   Bac_ManInsertGia( Bac_Man_t * p, Gia_Man_t * pGia );
+extern void *        Bac_ManInsertAbc( Bac_Man_t * p, void * pAbc );
+/*=== bacCba.c ===============================================================*/
+extern Bac_Man_t *   Bac_ManReadBac( char * pFileName );
+extern void          Bac_ManWriteBac( char * pFileName, Bac_Man_t * p );
+/*=== bacNtk.c ===============================================================*/
+extern char *        Bac_NtkGenerateName( Bac_Ntk_t * p, Bac_ObjType_t Type, Vec_Int_t * vBits );
+extern Bac_ObjType_t Bac_NameToType( char * pName );
+extern Vec_Int_t *   Bac_NameToRanges( char * pName );
+extern void          Bac_NtkUpdateFanout( Bac_Ntk_t * p, int iOld, int iNew );
+extern void          Bac_ManDeriveFanout( Bac_Man_t * p );
+//extern void          Bac_ManAssignInternNames( Bac_Man_t * p );
+extern void          Bac_ManAssignInternWordNames( Bac_Man_t * p );
+extern Bac_Man_t *   Bac_ManCollapse( Bac_Man_t * p );
+extern void          Bac_ManSetupTypes( char ** pNames, char ** pSymbs );
+/*=== bacPtr.c ===============================================================*/
+extern void          Bac_PtrFree( Vec_Ptr_t * vDes );
+extern int           Bac_PtrMemory( Vec_Ptr_t * vDes );
+extern void          Bac_PtrDumpBlif( char * pFileName, Vec_Ptr_t * vDes );
+extern void          Bac_PtrDumpVerilog( char * pFileName, Vec_Ptr_t * vDes );
+extern Vec_Ptr_t *   Bac_PtrTransformTest( Vec_Ptr_t * vDes );
+/*=== bacPtrAbc.c ============================================================*/
+extern Bac_Man_t *   Bac_PtrTransformToCba( Vec_Ptr_t * vDes );
+extern Vec_Ptr_t *   Bac_PtrDeriveFromCba( Bac_Man_t * p );
+/*=== bacPrsBuild.c ==========================================================*/
+extern Bac_Man_t *   Psr_ManBuildCba( char * pFileName, Vec_Ptr_t * vDes );
+/*=== bacReadBlif.c ==========================================================*/
+extern Vec_Ptr_t *   Psr_ManReadBlif( char * pFileName );
+/*=== bacReadSmt.c ===========================================================*/
+extern Vec_Ptr_t *   Psr_ManReadSmt( char * pFileName );
+/*=== bacReadVer.c ===========================================================*/
+extern Vec_Ptr_t *   Psr_ManReadVerilog( char * pFileName );
+/*=== bacWriteBlif.c =========================================================*/
+extern void          Psr_ManWriteBlif( char * pFileName, Vec_Ptr_t * p );
+extern void          Bac_ManWriteBlif( char * pFileName, Bac_Man_t * p );
+/*=== bacWriteVer.c ==========================================================*/
+extern void          Psr_ManWriteVerilog( char * pFileName, Vec_Ptr_t * p );
+extern void          Bac_ManWriteVerilog( char * pFileName, Bac_Man_t * p, int fUseAssign );
+
+ABC_NAMESPACE_HEADER_END
+
+#endif
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
diff --git a/src/base/bac/bacBac.c b/src/base/bac/bacBac.c
new file mode 100644
index 00000000..4f2971a5
--- /dev/null
+++ b/src/base/bac/bacBac.c
@@ -0,0 +1,298 @@
+/**CFile****************************************************************
+
+  FileName    [bacBac.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Verilog parser.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacBac.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+
+/**Function*************************************************************
+
+  Synopsis    [Read CBA.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int BacManReadBacLine( Vec_Str_t * vOut, int * pPos, char * pBuffer, char * pLimit )
+{
+    char c;
+    while ( (c = Vec_StrEntry(vOut, (*pPos)++)) != '\n' && pBuffer < pLimit )
+        *pBuffer++ = c;
+    *pBuffer = 0;
+    return pBuffer < pLimit;
+}
+int BacManReadBacNameAndNums( char * pBuffer, int * Num1, int * Num2, int * Num3, int * Num4 )
+{
+    *Num1 = *Num2 = *Num3 = *Num4 = -1;
+    // read name
+    while ( *pBuffer && *pBuffer != ' ' )
+        pBuffer++;
+    if ( !*pBuffer )
+        return 0;
+    assert( *pBuffer == ' ' );
+    *pBuffer = 0;
+    // read Num1
+    *Num1 = atoi(++pBuffer);
+    while ( *pBuffer && *pBuffer != ' ' )
+        pBuffer++;
+    if ( !*pBuffer )
+        return 0;
+    // read Num2
+    assert( *pBuffer == ' ' );
+    *Num2 = atoi(++pBuffer);
+    while ( *pBuffer && *pBuffer != ' ' )
+        pBuffer++;
+    if ( !*pBuffer )
+        return 1;
+    // read Num3
+    assert( *pBuffer == ' ' );
+    *Num3 = atoi(++pBuffer);
+    while ( *pBuffer && *pBuffer != ' ' )
+        pBuffer++;
+    if ( !*pBuffer )
+        return 1;
+    // read Num4
+    assert( *pBuffer == ' ' );
+    *Num4 = atoi(++pBuffer);
+    return 1;
+}
+void Bac_ManReadBacVecStr( Vec_Str_t * vOut, int * pPos, Vec_Str_t * p, int nSize )
+{
+    memcpy( Vec_StrArray(p), Vec_StrArray(vOut) + *pPos, nSize );
+    *pPos += nSize;
+    p->nSize = nSize;
+    assert( Vec_StrSize(p) == Vec_StrCap(p) );
+}
+void Bac_ManReadBacVecInt( Vec_Str_t * vOut, int * pPos, Vec_Int_t * p, int nSize )
+{
+    memcpy( Vec_IntArray(p), Vec_StrArray(vOut) + *pPos, nSize );
+    *pPos += nSize;
+    p->nSize = nSize / 4;
+    assert( Vec_IntSize(p) == Vec_IntCap(p) );
+}
+void Bac_ManReadBacNtk( Vec_Str_t * vOut, int * pPos, Bac_Ntk_t * pNtk )
+{
+    int i, Type;
+    //char * pName; int iObj, NameId;
+    Bac_ManReadBacVecStr( vOut, pPos, &pNtk->vType,      Bac_NtkObjNumAlloc(pNtk) );
+    Bac_ManReadBacVecInt( vOut, pPos, &pNtk->vFanin, 4 * Bac_NtkObjNumAlloc(pNtk) );
+    Bac_ManReadBacVecInt( vOut, pPos, &pNtk->vInfo, 12 * Bac_NtkInfoNumAlloc(pNtk) );
+    Bac_NtkForEachObjType( pNtk, Type, i )
+    {
+        if ( Type == BAC_OBJ_PI )
+            Vec_IntPush( &pNtk->vInputs, i );
+        if ( Type == BAC_OBJ_PO )
+            Vec_IntPush( &pNtk->vOutputs, i );
+    }
+    assert( Bac_NtkPiNum(pNtk)  == Bac_NtkPiNumAlloc(pNtk) );
+    assert( Bac_NtkPoNum(pNtk)  == Bac_NtkPoNumAlloc(pNtk) );
+    assert( Bac_NtkObjNum(pNtk) == Bac_NtkObjNumAlloc(pNtk) );
+    assert( Bac_NtkInfoNum(pNtk) == Bac_NtkInfoNumAlloc(pNtk) );
+/*
+    // read input/output/box names
+    Bac_NtkForEachPiMain( pNtk, iObj, i )
+    {
+        pName = Vec_StrEntryP( vOut, Pos );     
+        NameId = Abc_NamStrFindOrAdd( p->pStrs, pName, NULL );
+        Pos += strlen(pName) + 1;
+    }
+    Bac_NtkForEachPoMain( pNtk, iObj, i )
+    {
+        pName = Vec_StrEntryP( vOut, Pos );     
+        NameId = Abc_NamStrFindOrAdd( p->pStrs, pName, NULL );
+        Pos += strlen(pName) + 1;
+    }
+    Bac_NtkForEachBox( pNtk, iObj )
+    {
+        pName = Vec_StrEntryP( vOut, Pos );     
+        NameId = Abc_NamStrFindOrAdd( p->pStrs, pName, NULL );
+        Pos += strlen(pName) + 1;
+    }
+*/
+}
+Bac_Man_t * Bac_ManReadBacInt( Vec_Str_t * vOut )
+{
+    Bac_Man_t * p;
+    Bac_Ntk_t * pNtk;
+    char Buffer[1000] = "#"; 
+    int i, NameId, Pos = 0, nNtks, Num1, Num2, Num3, Num4;
+    while ( Buffer[0] == '#' )
+        if ( !BacManReadBacLine(vOut, &Pos, Buffer, Buffer+1000) )
+            return NULL;
+    if ( !BacManReadBacNameAndNums(Buffer, &nNtks, &Num2, &Num3, &Num4) )
+        return NULL;
+    // start manager
+    assert( nNtks > 0 );
+    p = Bac_ManAlloc( Buffer, nNtks );
+    // start networks
+    Bac_ManForEachNtk( p, pNtk, i )
+    {
+        if ( !BacManReadBacLine(vOut, &Pos, Buffer, Buffer+1000) )
+        {
+            Bac_ManFree( p );
+            return NULL;
+        }
+        if ( !BacManReadBacNameAndNums(Buffer, &Num1, &Num2, &Num3, &Num4) )
+        {
+            Bac_ManFree( p );
+            return NULL;
+        }
+        assert( Num1 >= 0 && Num2 >= 0 && Num3 >= 0 );
+        NameId = Abc_NamStrFindOrAdd( p->pStrs, Buffer, NULL );
+        Bac_NtkAlloc( pNtk, NameId, Num1, Num2, Num3 );
+        Vec_IntFill( &pNtk->vInfo, 3 * Num4, -1 );
+    }
+    // read networks
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_ManReadBacNtk( vOut, &Pos, pNtk );
+    assert( Bac_ManNtkNum(p) == nNtks );
+    assert( Pos == Vec_StrSize(vOut) );
+    return p;
+}
+Bac_Man_t * Bac_ManReadBac( char * pFileName )
+{
+    Bac_Man_t * p;
+    FILE * pFile;
+    Vec_Str_t * vOut;
+    int nFileSize;
+    pFile = fopen( pFileName, "rb" );
+    if ( pFile == NULL )
+    {
+        printf( "Cannot open file \"%s\" for reading.\n", pFileName );
+        return NULL;
+    }
+    // get the file size, in bytes
+    fseek( pFile, 0, SEEK_END );  
+    nFileSize = ftell( pFile );  
+    rewind( pFile ); 
+    // load the contents
+    vOut = Vec_StrAlloc( nFileSize );
+    vOut->nSize = vOut->nCap;
+    assert( nFileSize == Vec_StrSize(vOut) );
+    nFileSize = fread( Vec_StrArray(vOut), 1, Vec_StrSize(vOut), pFile );
+    assert( nFileSize == Vec_StrSize(vOut) );
+    fclose( pFile );
+    // read the networks
+    p = Bac_ManReadBacInt( vOut );
+    if ( p != NULL )
+    {
+        ABC_FREE( p->pSpec );
+        p->pSpec = Abc_UtilStrsav( pFileName );
+    }
+    Vec_StrFree( vOut );
+    return p;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Write CBA.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_ManWriteBacNtk( Vec_Str_t * vOut, Bac_Ntk_t * pNtk )
+{
+    //char * pName; int iObj, NameId;
+    Vec_StrPushBuffer( vOut, (char *)Vec_StrArray(&pNtk->vType),       Bac_NtkObjNum(pNtk) );
+    Vec_StrPushBuffer( vOut, (char *)Vec_IntArray(&pNtk->vFanin),  4 * Bac_NtkObjNum(pNtk) );
+    Vec_StrPushBuffer( vOut, (char *)Vec_IntArray(&pNtk->vInfo),  12 * Bac_NtkInfoNum(pNtk) );
+/*
+    // write input/output/box names
+    Bac_NtkForEachPiMain( pNtk, iObj, i )
+    {
+        pName = Bac_ObjNameStr( pNtk, iObj );
+        Vec_StrPrintStr( vOut, pName );
+        Vec_StrPush( vOut, '\0' );
+    }
+    Bac_NtkForEachPoMain( pNtk, iObj, i )
+    {
+        pName = Bac_ObjNameStr( pNtk, iObj );
+        Vec_StrPrintStr( vOut, pName );
+        Vec_StrPush( vOut, '\0' );
+    }
+    Bac_NtkForEachBox( pNtk, iObj )
+    {
+        pName = Bac_ObjNameStr( pNtk, iObj );  
+        Vec_StrPrintStr( vOut, pName );
+        Vec_StrPush( vOut, '\0' );
+    }
+*/
+}
+void Bac_ManWriteBacInt( Vec_Str_t * vOut, Bac_Man_t * p )
+{
+    char Buffer[1000];
+    Bac_Ntk_t * pNtk; int i;
+    sprintf( Buffer, "# Design \"%s\" written by ABC on %s\n", Bac_ManName(p), Extra_TimeStamp() );
+    Vec_StrPrintStr( vOut, Buffer );
+    // write short info
+    sprintf( Buffer, "%s %d \n", Bac_ManName(p), Bac_ManNtkNum(p) );
+    Vec_StrPrintStr( vOut, Buffer );
+    Bac_ManForEachNtk( p, pNtk, i )
+    {
+        sprintf( Buffer, "%s %d %d %d %d \n", Bac_NtkName(pNtk), 
+            Bac_NtkPiNum(pNtk), Bac_NtkPoNum(pNtk), Bac_NtkObjNum(pNtk), Bac_NtkInfoNum(pNtk) );
+        Vec_StrPrintStr( vOut, Buffer );
+    }
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_ManWriteBacNtk( vOut, pNtk );
+}
+void Bac_ManWriteBac( char * pFileName, Bac_Man_t * p )
+{
+    Vec_Str_t * vOut;
+    assert( p->pMioLib == NULL );
+    vOut = Vec_StrAlloc( 10000 );
+    Bac_ManWriteBacInt( vOut, p );
+    if ( Vec_StrSize(vOut) > 0 )
+    {
+        FILE * pFile = fopen( pFileName, "wb" );
+        if ( pFile == NULL )
+            printf( "Cannot open file \"%s\" for writing.\n", pFileName );
+        else
+        {
+            fwrite( Vec_StrArray(vOut), 1, Vec_StrSize(vOut), pFile );
+            fclose( pFile );
+        }
+    }
+    Vec_StrFree( vOut );    
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/bac/bacBlast.c b/src/base/bac/bacBlast.c
new file mode 100644
index 00000000..f1843648
--- /dev/null
+++ b/src/base/bac/bacBlast.c
@@ -0,0 +1,587 @@
+/**CFile****************************************************************
+
+  FileName    [bacBlast.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Bit-blasting of the netlist.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacBlast.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "base/abc/abc.h"
+#include "map/mio/mio.h"
+#include "bool/dec/dec.h"
+#include "base/main/mainInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_ManPrepareGates( Bac_Man_t * p )
+{
+    Dec_Graph_t ** ppGraphs; int i;
+    if ( p->pMioLib == NULL )
+        return;
+    ppGraphs = ABC_CALLOC( Dec_Graph_t *, Abc_NamObjNumMax(p->pMods) );
+    for ( i = 1; i < Abc_NamObjNumMax(p->pMods); i++ )
+    {
+        char * pGateName = Abc_NamStr( p->pMods, i );
+        Mio_Gate_t * pGate = Mio_LibraryReadGateByName( (Mio_Library_t *)p->pMioLib, pGateName, NULL );
+        if ( pGate != NULL )
+            ppGraphs[i] = Dec_Factor( Mio_GateReadSop(pGate) );
+    }
+    assert( p->ppGraphs == NULL );
+    p->ppGraphs = (void **)ppGraphs;
+}
+void Bac_ManUndoGates( Bac_Man_t * p )
+{
+    int i;
+    if ( p->pMioLib == NULL )
+        return;
+    for ( i = 1; i < Abc_NamObjNumMax(p->pMods); i++ )
+        if ( p->ppGraphs[i] )
+            Dec_GraphFree( (Dec_Graph_t *)p->ppGraphs[i] );
+    ABC_FREE( p->ppGraphs );
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Bac_ManAddBarbuf( Gia_Man_t * pNew, int iRes, Bac_Man_t * p, int iLNtk, int iLObj, int iRNtk, int iRObj, Vec_Int_t * vMap )
+{
+    int iBufLit, iIdLit;
+    if ( iRes == 0 || iRes == 1 )
+        return iRes;
+    assert( iRes > 0 );
+    if ( vMap && Abc_Lit2Var(iRes) < Vec_IntSize(vMap) && (iIdLit = Vec_IntEntry(vMap, Abc_Lit2Var(iRes))) >= 0 && 
+        Vec_IntEntry(&p->vBuf2LeafNtk, Abc_Lit2Var(iIdLit)) == iLNtk && Vec_IntEntry(&p->vBuf2RootNtk, Abc_Lit2Var(iIdLit)) == iRNtk )
+        return Abc_LitNotCond( Vec_IntEntry(pNew->vBarBufs, Abc_Lit2Var(iIdLit)), Abc_LitIsCompl(iRes) ^ Abc_LitIsCompl(iIdLit) );
+    assert( Bac_ManNtkIsOk(p, iLNtk) && Bac_ManNtkIsOk(p, iRNtk) );
+    Vec_IntPush( &p->vBuf2LeafNtk, iLNtk );
+    Vec_IntPush( &p->vBuf2LeafObj, iLObj );
+    Vec_IntPush( &p->vBuf2RootNtk, iRNtk );
+    Vec_IntPush( &p->vBuf2RootObj, iRObj );
+    iBufLit = Gia_ManAppendBuf( pNew, iRes );
+    if ( vMap )
+    {
+        Vec_IntSetEntryFull( vMap, Abc_Lit2Var(iRes), Abc_Var2Lit(Vec_IntSize(pNew->vBarBufs), Abc_LitIsCompl(iRes)) );
+        Vec_IntPush( pNew->vBarBufs, iBufLit );
+    }
+    return iBufLit;
+}
+int Bac_ManExtract_rec( Gia_Man_t * pNew, Bac_Ntk_t * p, int i, int fBuffers, Vec_Int_t * vMap )
+{
+    int iRes = Bac_ObjCopy( p, i );
+    if ( iRes >= 0 )
+        return iRes;
+    if ( Bac_ObjIsCo(p, i) )
+        iRes = Bac_ManExtract_rec( pNew, p, Bac_ObjFanin(p, i), fBuffers, vMap );
+    else if ( Bac_ObjIsPi(p, i) )
+    {
+        Bac_Ntk_t * pHost = Bac_NtkHostNtk( p );
+        int iObj = Bac_BoxBi( pHost, Bac_NtkHostObj(p), Bac_ObjIndex(p, i) );
+        iRes = Bac_ManExtract_rec( pNew, pHost, iObj, fBuffers, vMap );
+        if ( fBuffers )
+            iRes = Bac_ManAddBarbuf( pNew, iRes, p->pDesign, Bac_NtkId(p), i, Bac_NtkId(pHost), iObj, vMap );
+    }
+    else if ( Bac_ObjIsBo(p, i) )
+    {
+        int iBox = Bac_BoxBoBox(p, i);
+        if ( Bac_ObjIsBoxUser(p, iBox) ) // user box
+        {
+            Bac_Ntk_t * pBox = Bac_BoxBoNtk( p, i );
+            int iObj = Bac_NtkPo( pBox, Bac_ObjIndex(p, i) );
+            iRes = Bac_ManExtract_rec( pNew, pBox, iObj, fBuffers, vMap );
+            if ( fBuffers )
+                iRes = Bac_ManAddBarbuf( pNew, iRes, p->pDesign, Bac_NtkId(p), i, Bac_NtkId(pBox), iObj, vMap );
+        }
+        else // primitive
+        {
+            int iFanin, nLits, pLits[16];
+            assert( Bac_ObjIsBoxPrim(p, iBox) );
+            Bac_BoxForEachFanin( p, iBox, iFanin, nLits )
+                pLits[nLits] = Bac_ManExtract_rec( pNew, p, iFanin, fBuffers, vMap );
+            assert( nLits <= 16 );
+            if ( p->pDesign->ppGraphs ) // mapped gate
+            {
+                extern int Gia_ManFactorGraph( Gia_Man_t * p, Dec_Graph_t * pFForm, Vec_Int_t * vLeaves );
+                Dec_Graph_t * pGraph = (Dec_Graph_t *)p->pDesign->ppGraphs[Bac_BoxNtkId(p, iBox)];
+                Vec_Int_t Leaves = { nLits, nLits, pLits };
+                assert( pGraph != NULL );
+                return Gia_ManFactorGraph( pNew, pGraph, &Leaves );
+            }
+            else
+            {
+                Bac_ObjType_t Type = Bac_ObjType(p, iBox);
+                if ( nLits == 0 )
+                {
+                    if ( Type == BAC_BOX_CF )
+                        iRes = 0;
+                    else if ( Type == BAC_BOX_CT )
+                        iRes = 1;
+                    else assert( 0 );
+                }
+                else if ( nLits == 1 )
+                {
+                    if ( Type == BAC_BOX_BUF )
+                        iRes = pLits[0];
+                    else if ( Type == BAC_BOX_INV )
+                        iRes = Abc_LitNot( pLits[0] );
+                    else assert( 0 );
+                }
+                else if ( nLits == 2 )
+                {
+                    if ( Type == BAC_BOX_AND )
+                        iRes = Gia_ManHashAnd( pNew, pLits[0], pLits[1] );
+                    else if ( Type == BAC_BOX_NAND )
+                        iRes = Abc_LitNot( Gia_ManHashAnd( pNew, pLits[0], pLits[1] ) );
+                    else if ( Type == BAC_BOX_OR )
+                        iRes = Gia_ManHashOr( pNew, pLits[0], pLits[1] );
+                    else if ( Type == BAC_BOX_NOR )
+                        iRes = Abc_LitNot( Gia_ManHashOr( pNew, pLits[0], pLits[1] ) );
+                    else if ( Type == BAC_BOX_XOR )
+                        iRes = Gia_ManHashXor( pNew, pLits[0], pLits[1] );
+                    else if ( Type == BAC_BOX_XNOR )
+                        iRes = Abc_LitNot( Gia_ManHashXor( pNew, pLits[0], pLits[1] ) );
+                    else if ( Type == BAC_BOX_SHARP )
+                        iRes = Gia_ManHashAnd( pNew, pLits[0], Abc_LitNot(pLits[1]) );
+                    else if ( Type == BAC_BOX_SHARPL )
+                        iRes = Gia_ManHashAnd( pNew, Abc_LitNot(pLits[0]), pLits[1] );
+                    else assert( 0 );
+                }
+                else if ( nLits == 3 )
+                {
+                    if ( Type == BAC_BOX_MUX )
+                        iRes = Gia_ManHashMux( pNew, pLits[0], pLits[1], pLits[2] );
+                    else if ( Type == BAC_BOX_MAJ )
+                        iRes = Gia_ManHashMaj( pNew, pLits[0], pLits[1], pLits[2] );
+                    else if ( Type == BAC_BOX_ADD )
+                    {
+                        int iRes0 = Gia_ManHashAnd( pNew, pLits[1], pLits[2] );
+                        int iRes1 = Gia_ManHashOr( pNew, pLits[1], pLits[2] );
+                        assert( Bac_BoxBoNum(p, iBox) == 2 );
+                        if ( Bac_BoxBo(p, iBox, 0) == i ) // sum
+                            iRes = Gia_ManHashXor( pNew, pLits[0], Gia_ManHashAnd(pNew, Abc_LitNot(iRes0), iRes1) );
+                        else if ( Bac_BoxBo(p, iBox, 1) == i ) // cout
+                            iRes = Gia_ManHashOr( pNew, iRes0, Gia_ManHashAnd(pNew, pLits[0], iRes1) );
+                        else assert( 0 );
+                    }
+                    else assert( 0 );
+                }
+                else assert( 0 );
+            }
+        }
+    }
+    else assert( 0 );
+    Bac_ObjSetCopy( p, i, iRes );
+    return iRes;
+}
+Gia_Man_t * Bac_ManExtract( Bac_Man_t * p, int fBuffers, int fVerbose )
+{
+    Bac_Ntk_t * pNtk, * pRoot = Bac_ManRoot(p);
+    Gia_Man_t * pNew, * pTemp; 
+    Vec_Int_t * vMap = NULL;
+    int i, iObj;
+
+    Vec_IntClear( &p->vBuf2LeafNtk );
+    Vec_IntClear( &p->vBuf2LeafObj );
+    Vec_IntClear( &p->vBuf2RootNtk );
+    Vec_IntClear( &p->vBuf2RootObj );
+
+    Bac_ManForEachNtk( p, pNtk, i )
+    {
+        Bac_NtkDeriveIndex( pNtk );
+        Bac_NtkStartCopies( pNtk );
+    }
+
+    // start the manager
+    pNew = Gia_ManStart( Bac_ManNodeNum(p) );
+    pNew->pName = Abc_UtilStrsav(p->pName);
+    pNew->pSpec = Abc_UtilStrsav(p->pSpec);
+
+    // primary inputs
+    Bac_NtkForEachPi( pRoot, iObj, i )
+        Bac_ObjSetCopy( pRoot, iObj, Gia_ManAppendCi(pNew) );
+
+    // internal nodes
+    Gia_ManHashAlloc( pNew );
+    pNew->vBarBufs = Vec_IntAlloc( 10000 );
+    vMap = Vec_IntStartFull( 10000 );
+    Bac_ManPrepareGates( p );
+    Bac_NtkForEachPo( pRoot, iObj, i )
+        Bac_ManExtract_rec( pNew, pRoot, iObj, fBuffers, vMap );
+    Bac_ManUndoGates( p );
+    Vec_IntFreeP( &vMap );
+    Gia_ManHashStop( pNew );
+
+    // primary outputs
+    Bac_NtkForEachPo( pRoot, iObj, i )
+        Gia_ManAppendCo( pNew, Bac_ObjCopy(pRoot, iObj) );
+    assert( Vec_IntSize(&p->vBuf2LeafNtk) == pNew->nBufs );
+
+    // cleanup
+    pNew = Gia_ManCleanup( pTemp = pNew );
+    Gia_ManStop( pTemp );
+    //Gia_ManPrintStats( pNew, NULL );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Mark each GIA node with the network it belongs to.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_ManMarkNodesGia( Bac_Man_t * p, Gia_Man_t * pGia )
+{
+    Gia_Obj_t * pObj; int i, Count = 0;
+    assert( Vec_IntSize(&p->vBuf2LeafNtk) == Gia_ManBufNum(pGia) );
+    Gia_ManConst0(pGia)->Value = 1;
+    Gia_ManForEachPi( pGia, pObj, i )
+        pObj->Value = 1;
+    Gia_ManForEachAnd( pGia, pObj, i )
+    {
+        if ( Gia_ObjIsBuf(pObj) )
+            pObj->Value = Vec_IntEntry( &p->vBuf2LeafNtk, Count++ );
+        else
+        {
+            pObj->Value = Gia_ObjFanin0(pObj)->Value;
+            assert( pObj->Value == Gia_ObjFanin1(pObj)->Value );
+        }
+    }
+    assert( Count == Gia_ManBufNum(pGia) );
+    Gia_ManForEachPo( pGia, pObj, i )
+    {
+        assert( Gia_ObjFanin0(pObj)->Value == 1 );
+        pObj->Value = 1;
+    }
+}
+void Bac_ManRemapBarbufs( Bac_Man_t * pNew, Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk;  int Entry, i;
+    //assert( Vec_IntSize(&p->vBuf2RootNtk) );
+    assert( !Vec_IntSize(&pNew->vBuf2RootNtk) );
+    Vec_IntAppend( &pNew->vBuf2RootNtk, &p->vBuf2RootNtk );
+    Vec_IntAppend( &pNew->vBuf2RootObj, &p->vBuf2RootObj );
+    Vec_IntAppend( &pNew->vBuf2LeafNtk, &p->vBuf2LeafNtk );
+    Vec_IntAppend( &pNew->vBuf2LeafObj, &p->vBuf2LeafObj );
+    Vec_IntForEachEntry( &p->vBuf2LeafObj, Entry, i )
+    {
+        pNtk = Bac_ManNtk( p, Vec_IntEntry(&p->vBuf2LeafNtk, i) );
+        Vec_IntWriteEntry( &pNew->vBuf2LeafObj, i, Bac_ObjCopy(pNtk, Entry) );
+    }
+    Vec_IntForEachEntry( &p->vBuf2RootObj, Entry, i )
+    {
+        pNtk = Bac_ManNtk( p, Vec_IntEntry(&p->vBuf2RootNtk, i) );
+        Vec_IntWriteEntry( &pNew->vBuf2RootObj, i, Bac_ObjCopy(pNtk, Entry) );
+    }
+}
+void Bac_NtkCreateAndConnectBuffer( Gia_Man_t * pGia, Gia_Obj_t * pObj, Bac_Ntk_t * p, int iTerm )
+{
+    int iObj;
+    if ( pGia && Gia_ObjFaninId0p(pGia, pObj) > 0 )
+    {
+        iObj = Bac_ObjAlloc( p, BAC_OBJ_BI, Gia_ObjFanin0(pObj)->Value );
+        Bac_ObjAlloc( p, Gia_ObjFaninC0(pObj) ? BAC_BOX_INV : BAC_BOX_BUF, -1 );
+    }
+    else
+    {
+        Bac_ObjAlloc( p, pGia && Gia_ObjFaninC0(pObj) ? BAC_BOX_CT : BAC_BOX_CF, -1 );
+    }
+    iObj = Bac_ObjAlloc( p, BAC_OBJ_BO, -1 );
+    Bac_ObjSetFanin( p, iTerm, iObj );
+}
+void Bac_NtkInsertGia( Bac_Man_t * p, Gia_Man_t * pGia )
+{
+    Bac_Ntk_t * pNtk, * pRoot = Bac_ManRoot( p );
+    int i, j, k, iBox, iTerm, Count = 0;
+    Gia_Obj_t * pObj;
+
+    Gia_ManConst0(pGia)->Value = ~0;
+    Gia_ManForEachPi( pGia, pObj, i )
+        pObj->Value = Bac_NtkPi( pRoot, i );
+    Gia_ManForEachAnd( pGia, pObj, i )
+    {
+        if ( Gia_ObjIsBuf(pObj) )
+        {
+            pNtk = Bac_ManNtk( p, Vec_IntEntry(&p->vBuf2RootNtk, Count) );
+            iTerm = Vec_IntEntry( &p->vBuf2RootObj, Count );
+            assert( Bac_ObjIsCo(pNtk, iTerm) );
+            if ( Bac_ObjFanin(pNtk, iTerm) == -1 ) // not a feedthrough
+                Bac_NtkCreateAndConnectBuffer( pGia, pObj, pNtk, iTerm );
+            // prepare leaf
+            pObj->Value = Vec_IntEntry( &p->vBuf2LeafObj, Count++ );
+        }
+        else
+        {
+            int iLit0 = Gia_ObjFanin0(pObj)->Value;
+            int iLit1 = Gia_ObjFanin1(pObj)->Value;
+            Bac_ObjType_t Type;
+            pNtk = Bac_ManNtk( p, pObj->Value );
+            if ( Gia_ObjFaninC0(pObj) && Gia_ObjFaninC1(pObj) )
+                Type = BAC_BOX_NOR;
+            else if ( Gia_ObjFaninC1(pObj) )
+                Type = BAC_BOX_SHARP;
+            else if ( Gia_ObjFaninC0(pObj) )
+            {
+                Type = BAC_BOX_SHARP;
+                ABC_SWAP( int, iLit0, iLit1 );
+            }
+            else 
+                Type = BAC_BOX_AND;
+            // create box
+            iTerm = Bac_ObjAlloc( pNtk, BAC_OBJ_BI, iLit1 );
+            iTerm = Bac_ObjAlloc( pNtk, BAC_OBJ_BI, iLit0 );
+            Bac_ObjAlloc( pNtk, Type, -1 );
+            pObj->Value = Bac_ObjAlloc( pNtk, BAC_OBJ_BO, -1 );
+        }
+    }
+    assert( Count == Gia_ManBufNum(pGia) );
+
+    // create constant 0 drivers for COs without barbufs
+    Bac_ManForEachNtk( p, pNtk, i )
+    {
+        Bac_NtkForEachBox( pNtk, iBox )
+            Bac_BoxForEachBi( pNtk, iBox, iTerm, j )
+                if ( Bac_ObjFanin(pNtk, iTerm) == -1 )
+                    Bac_NtkCreateAndConnectBuffer( NULL, NULL, pNtk, iTerm );
+        Bac_NtkForEachPo( pNtk, iTerm, k )
+            if ( pNtk != pRoot && Bac_ObjFanin(pNtk, iTerm) == -1 )
+                Bac_NtkCreateAndConnectBuffer( NULL, NULL, pNtk, iTerm );
+    }
+    // create node and connect POs
+    Gia_ManForEachPo( pGia, pObj, i )
+        if ( Bac_ObjFanin(pRoot, Bac_NtkPo(pRoot, i)) == -1 ) // not a feedthrough
+            Bac_NtkCreateAndConnectBuffer( pGia, pObj, pRoot, Bac_NtkPo(pRoot, i) );
+}
+Bac_Man_t * Bac_ManInsertGia( Bac_Man_t * p, Gia_Man_t * pGia )
+{
+    Bac_Man_t * pNew = Bac_ManDupUserBoxes( p );
+    Bac_ManMarkNodesGia( p, pGia );
+    Bac_ManRemapBarbufs( pNew, p );
+    Bac_NtkInsertGia( pNew, pGia );
+    Bac_ManMoveNames( pNew, p );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Bac_Man_t * Bac_ManBlastTest( Bac_Man_t * p )
+{
+    Gia_Man_t * pGia = Bac_ManExtract( p, 1, 0 );
+    Bac_Man_t * pNew = Bac_ManInsertGia( p, pGia );
+    Gia_ManStop( pGia );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Mark each GIA node with the network it belongs to.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Abc_NodeIsSeriousGate( Abc_Obj_t * p )
+{
+    return Abc_ObjIsNode(p) && Abc_ObjFaninNum(p) > 0 && !Abc_ObjIsBarBuf(p);
+}
+void Bac_ManMarkNodesAbc( Bac_Man_t * p, Abc_Ntk_t * pNtk )
+{
+    Abc_Obj_t * pObj, * pFanin; int i, k, Count = 0;
+    assert( Vec_IntSize(&p->vBuf2LeafNtk) == pNtk->nBarBufs2 );
+    Abc_NtkForEachPi( pNtk, pObj, i )
+        pObj->iTemp = 1;
+    Abc_NtkForEachNode( pNtk, pObj, i )
+    {
+        if ( Abc_ObjIsBarBuf(pObj) )
+            pObj->iTemp = Vec_IntEntry( &p->vBuf2LeafNtk, Count++ );
+        else if ( Abc_NodeIsSeriousGate(pObj) )
+        {
+            pObj->iTemp = Abc_ObjFanin0(pObj)->iTemp;
+            Abc_ObjForEachFanin( pObj, pFanin, k )
+                assert( pObj->iTemp == pFanin->iTemp );
+        }
+    }
+    Abc_NtkForEachPo( pNtk, pObj, i )
+    {
+        if ( !Abc_NodeIsSeriousGate(Abc_ObjFanin0(pObj)) )
+            continue;
+        assert( Abc_ObjFanin0(pObj)->iTemp == 1 );
+        pObj->iTemp = Abc_ObjFanin0(pObj)->iTemp;
+    }
+    assert( Count == pNtk->nBarBufs2 );
+}
+void Bac_NtkCreateOrConnectFanin( Abc_Obj_t * pFanin, Bac_Ntk_t * p, int iTerm )
+{
+    int iObj;
+    if ( pFanin && Abc_NodeIsSeriousGate(pFanin) )//&& Bac_ObjName(p, pFanin->iTemp) == -1 ) // gate without name
+    {
+        iObj = pFanin->iTemp;
+    }
+    else if ( pFanin && (Abc_ObjIsPi(pFanin) || Abc_ObjIsBarBuf(pFanin) || Abc_NodeIsSeriousGate(pFanin)) ) // PI/BO or gate with name
+    {
+        iObj = Bac_ObjAlloc( p, BAC_OBJ_BI, pFanin->iTemp );
+        Bac_ObjAlloc( p, BAC_BOX_GATE, p->pDesign->ElemGates[2] ); // buffer
+        iObj = Bac_ObjAlloc( p, BAC_OBJ_BO, -1 );
+    }
+    else
+    {
+        assert( !pFanin || Abc_NodeIsConst0(pFanin) || Abc_NodeIsConst1(pFanin) );
+        Bac_ObjAlloc( p, BAC_BOX_GATE, p->pDesign->ElemGates[(pFanin && Abc_NodeIsConst1(pFanin))] ); // const 0/1
+        iObj = Bac_ObjAlloc( p, BAC_OBJ_BO, -1 );
+    }
+    Bac_ObjSetFanin( p, iTerm, iObj );
+}
+void Bac_NtkPrepareLibrary( Bac_Man_t * p, Mio_Library_t * pLib )
+{
+    Mio_Gate_t * pGate;
+    Mio_Gate_t * pGate0 = Mio_LibraryReadConst0( pLib );
+    Mio_Gate_t * pGate1 = Mio_LibraryReadConst1( pLib );
+    Mio_Gate_t * pGate2 = Mio_LibraryReadBuf( pLib );
+    if ( !pGate0 || !pGate1 || !pGate2 )
+    {
+        printf( "The library does not have one of the elementary gates.\n" );
+        return;
+    }
+    p->ElemGates[0] = Abc_NamStrFindOrAdd( p->pMods, Mio_GateReadName(pGate0), NULL );
+    p->ElemGates[1] = Abc_NamStrFindOrAdd( p->pMods, Mio_GateReadName(pGate1), NULL );
+    p->ElemGates[2] = Abc_NamStrFindOrAdd( p->pMods, Mio_GateReadName(pGate2), NULL );
+    Mio_LibraryForEachGate( pLib, pGate )
+        if ( pGate != pGate0 && pGate != pGate1 && pGate != pGate2 )
+            Abc_NamStrFindOrAdd( p->pMods, Mio_GateReadName(pGate), NULL );
+    assert( Abc_NamObjNumMax(p->pMods) > 1 );
+}
+int Bac_NtkBuildLibrary( Bac_Man_t * p )
+{
+    int RetValue = 1;
+    Mio_Library_t * pLib = (Mio_Library_t *)Abc_FrameReadLibGen();
+    if ( pLib == NULL )
+        printf( "The standard cell library is not available.\n" ), RetValue = 0;
+    else
+        Bac_NtkPrepareLibrary( p, pLib );
+    p->pMioLib = pLib;
+    return RetValue;
+}
+void Bac_NtkInsertNtk( Bac_Man_t * p, Abc_Ntk_t * pNtk )
+{
+    Bac_Ntk_t * pCbaNtk, * pRoot = Bac_ManRoot( p );
+    int i, j, k, iBox, iTerm, Count = 0;
+    Abc_Obj_t * pObj;
+    assert( Abc_NtkHasMapping(pNtk) );
+    Bac_NtkPrepareLibrary( p, (Mio_Library_t *)pNtk->pManFunc );
+    p->pMioLib = pNtk->pManFunc;
+
+    Abc_NtkForEachPi( pNtk, pObj, i )
+        pObj->iTemp = Bac_NtkPi( pRoot, i );
+    Abc_NtkForEachNode( pNtk, pObj, i )
+    {
+        if ( Abc_ObjIsBarBuf(pObj) )
+        {
+            pCbaNtk = Bac_ManNtk( p, Vec_IntEntry(&p->vBuf2RootNtk, Count) );
+            iTerm = Vec_IntEntry( &p->vBuf2RootObj, Count );
+            assert( Bac_ObjIsCo(pCbaNtk, iTerm) );
+            if ( Bac_ObjFanin(pCbaNtk, iTerm) == -1 ) // not a feedthrough
+                Bac_NtkCreateOrConnectFanin( Abc_ObjFanin0(pObj), pCbaNtk, iTerm );
+            // prepare leaf
+            pObj->iTemp = Vec_IntEntry( &p->vBuf2LeafObj, Count++ );
+        }
+        else if ( Abc_NodeIsSeriousGate(pObj) )
+        {
+            pCbaNtk = Bac_ManNtk( p, pObj->iTemp );
+            for ( k = Abc_ObjFaninNum(pObj)-1; k >= 0; k-- )
+                iTerm = Bac_ObjAlloc( pCbaNtk, BAC_OBJ_BI, Abc_ObjFanin(pObj, k)->iTemp );
+            Bac_ObjAlloc( pCbaNtk, BAC_BOX_GATE, Abc_NamStrFind(p->pMods, Mio_GateReadName((Mio_Gate_t *)pObj->pData)) );
+            pObj->iTemp = Bac_ObjAlloc( pCbaNtk, BAC_OBJ_BO, -1 );
+        }
+    }
+    assert( Count == pNtk->nBarBufs2 );
+
+    // create constant 0 drivers for COs without barbufs
+    Bac_ManForEachNtk( p, pCbaNtk, i )
+    {
+        Bac_NtkForEachBox( pCbaNtk, iBox )
+            Bac_BoxForEachBi( pCbaNtk, iBox, iTerm, j )
+                if ( Bac_ObjFanin(pCbaNtk, iTerm) == -1 )
+                    Bac_NtkCreateOrConnectFanin( NULL, pCbaNtk, iTerm );
+        Bac_NtkForEachPo( pCbaNtk, iTerm, k )
+            if ( pCbaNtk != pRoot && Bac_ObjFanin(pCbaNtk, iTerm) == -1 )
+                Bac_NtkCreateOrConnectFanin( NULL, pCbaNtk, iTerm );
+    }
+    // create node and connect POs
+    Abc_NtkForEachPo( pNtk, pObj, i )
+        if ( Bac_ObjFanin(pRoot, Bac_NtkPo(pRoot, i)) == -1 ) // not a feedthrough
+            Bac_NtkCreateOrConnectFanin( Abc_ObjFanin0(pObj), pRoot, Bac_NtkPo(pRoot, i) );
+}
+void * Bac_ManInsertAbc( Bac_Man_t * p, void * pAbc )
+{
+    Abc_Ntk_t * pNtk = (Abc_Ntk_t *)pAbc;
+    Bac_Man_t * pNew = Bac_ManDupUserBoxes( p );
+    Bac_ManMarkNodesAbc( p, pNtk );
+    Bac_ManRemapBarbufs( pNew, p );
+    Bac_NtkInsertNtk( pNew, pNtk );
+    Bac_ManMoveNames( pNew, p );
+    return pNew;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/bac/bacCom.c b/src/base/bac/bacCom.c
new file mode 100644
index 00000000..5e414620
--- /dev/null
+++ b/src/base/bac/bacCom.c
@@ -0,0 +1,728 @@
+/**CFile****************************************************************
+
+  FileName    [bacCom.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Command handlers.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacCom.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+#include "proof/cec/cec.h"
+#include "base/main/mainInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+static int  Bac_CommandRead     ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandWrite    ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandPs       ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandPut      ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandGet      ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandClp      ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandCec      ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int  Bac_CommandTest     ( Abc_Frame_t * pAbc, int argc, char ** argv );
+
+static inline Bac_Man_t * Bac_AbcGetMan( Abc_Frame_t * pAbc )                       { return (Bac_Man_t *)pAbc->pAbcCba;                        }
+static inline void        Bac_AbcFreeMan( Abc_Frame_t * pAbc )                      { if ( pAbc->pAbcCba ) Bac_ManFree(Bac_AbcGetMan(pAbc));    }
+static inline void        Bac_AbcUpdateMan( Abc_Frame_t * pAbc, Bac_Man_t * p )     { Bac_AbcFreeMan(pAbc); pAbc->pAbcCba = p;                  }
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function********************************************************************
+
+  Synopsis    [Accessing current Bac_Ntk_t.]
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+void Abc_FrameImportPtr( Vec_Ptr_t * vPtr )
+{
+    Bac_Man_t * p;
+    if ( Abc_FrameGetGlobalFrame() == NULL )
+    {
+        printf( "ABC framework is not started.\n" );
+        return;
+    }
+    p = Bac_PtrTransformToCba( vPtr );
+    if ( p == NULL )
+        printf( "Converting from Ptr failed.\n" );
+    Bac_AbcUpdateMan( Abc_FrameGetGlobalFrame(), p );
+}
+Vec_Ptr_t * Abc_FrameExportPtr()
+{
+    Vec_Ptr_t * vPtr;
+    Bac_Man_t * p;
+    if ( Abc_FrameGetGlobalFrame() == NULL )
+    {
+        printf( "ABC framework is not started.\n" );
+        return NULL;
+    }
+    p = Bac_AbcGetMan( Abc_FrameGetGlobalFrame() );
+    if ( p == NULL )
+        printf( "There is no CBA design present.\n" );
+    vPtr = Bac_PtrDeriveFromCba( p );
+    if ( vPtr == NULL )
+        printf( "Converting to Ptr has failed.\n" );
+    return vPtr;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+void Bac_Init( Abc_Frame_t * pAbc )
+{
+    Cmd_CommandAdd( pAbc, "New word level", "@_read",       Bac_CommandRead,      0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_write",      Bac_CommandWrite,     0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_ps",         Bac_CommandPs,        0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_put",        Bac_CommandPut,       0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_get",        Bac_CommandGet,       0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_clp",        Bac_CommandClp,       0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_cec",        Bac_CommandCec,       0 );
+    Cmd_CommandAdd( pAbc, "New word level", "@_test",       Bac_CommandTest,      0 );
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+void Bac_End( Abc_Frame_t * pAbc )
+{
+    Bac_AbcFreeMan( pAbc );
+}
+
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandRead( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    FILE * pFile;
+    Bac_Man_t * p = NULL;
+    Vec_Ptr_t * vDes = NULL;
+    char * pFileName = NULL;
+    int c, fUseAbc = 0, fUsePtr = 0, fVerbose  =    0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "apvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'a':
+            fUseAbc ^= 1;
+            break;
+        case 'p':
+            fUsePtr ^= 1;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( argc != globalUtilOptind + 1 )
+    {
+        printf( "Bac_CommandRead(): Input file name should be given on the command line.\n" );
+        return 0;
+    }
+    // get the file name
+    pFileName = argv[globalUtilOptind];
+    if ( (pFile = fopen( pFileName, "r" )) == NULL )
+    {
+        Abc_Print( 1, "Cannot open input file \"%s\". ", pFileName );
+        if ( (pFileName = Extra_FileGetSimilarName( pFileName, ".v", ".blif", ".smt", ".bac", NULL )) )
+            Abc_Print( 1, "Did you mean \"%s\"?", pFileName );
+        Abc_Print( 1, "\n" );
+        return 0;
+    }
+    fclose( pFile );
+    // perform reading
+    if ( fUseAbc || fUsePtr )
+    {
+        extern Vec_Ptr_t * Ptr_AbcDeriveDes( Abc_Ntk_t * pNtk );
+        Abc_Ntk_t * pAbcNtk = Io_ReadNetlist( pFileName, Io_ReadFileType(pFileName), 0 );
+        Vec_Ptr_t * vDes = Ptr_AbcDeriveDes( pAbcNtk );
+        p = Bac_PtrTransformToCba( vDes );
+        Bac_PtrFree( vDes ); // points to names in pAbcNtk
+        if ( p )
+        {
+            ABC_FREE( p->pSpec );
+            p->pSpec = Abc_UtilStrsav( pAbcNtk->pSpec );
+        }
+        Abc_NtkDelete( pAbcNtk );
+    }
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "blif" )  )
+    {
+        vDes = Psr_ManReadBlif( pFileName );
+        if ( vDes && Vec_PtrSize(vDes) )
+            p = Psr_ManBuildCba( pFileName, vDes );
+        if ( vDes )
+            Psr_ManVecFree( vDes );
+    }
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "v" )  )
+    {
+        vDes = Psr_ManReadVerilog( pFileName );
+        if ( vDes && Vec_PtrSize(vDes) )
+            p = Psr_ManBuildCba( pFileName, vDes );
+        if ( vDes )
+            Psr_ManVecFree( vDes );
+    }
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "smt" )  )
+    {
+        vDes = NULL;//Psr_ManReadSmt( pFileName );
+        if ( vDes && Vec_PtrSize(vDes) )
+            p = Psr_ManBuildCba( pFileName, vDes );
+        if ( vDes )
+            Psr_ManVecFree( vDes );
+    }
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "bac" )  )
+    {
+        p = Bac_ManReadBac( pFileName );
+    }
+    else 
+    {
+        printf( "Unrecognized input file extension.\n" );
+        return 0;
+    }
+    Bac_AbcUpdateMan( pAbc, p );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_read [-apvh] <file_name>\n" );
+    Abc_Print( -2, "\t         reads hierarchical design in BLIF or Verilog\n" );
+    Abc_Print( -2, "\t-a     : toggle using old ABC parser [default = %s]\n", fUseAbc? "yes": "no" );
+    Abc_Print( -2, "\t-p     : toggle using Ptr construction [default = %s]\n", fUsePtr? "yes": "no" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandWrite( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * p = Bac_AbcGetMan(pAbc);
+    char * pFileName = NULL;
+    int fUseAssign   =    1;
+    int fUsePtr      =    0; 
+    int c, fVerbose  =    0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "apvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'a':
+            fUseAssign ^= 1;
+            break;
+        case 'p':
+            fUsePtr ^= 1;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandWrite(): There is no current design.\n" );
+        return 0;
+    }
+    if ( argc == globalUtilOptind + 1 )
+        pFileName = argv[globalUtilOptind];
+    else if ( argc == globalUtilOptind && p )
+        pFileName = Extra_FileNameGenericAppend( Bac_ManName(p), "_out.v" );
+    else 
+    {
+        printf( "Output file name should be given on the command line.\n" );
+        return 0;
+    }
+    // perform writing
+    if ( !strcmp( Extra_FileNameExtension(pFileName), "blif" )  )
+        Bac_ManWriteBlif( pFileName, p );
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "v" )  )
+    {
+        if ( fUsePtr )
+        {
+            Vec_Ptr_t * vPtr = Bac_PtrDeriveFromCba( p );
+            if ( vPtr == NULL )
+                printf( "Converting to Ptr has failed.\n" );
+            else
+            {
+                Bac_PtrDumpVerilog( pFileName, vPtr );
+                Bac_PtrFree( vPtr ); 
+            }
+        }
+        else
+            Bac_ManWriteVerilog( pFileName, p, fUseAssign );        
+    }
+    else if ( !strcmp( Extra_FileNameExtension(pFileName), "bac" )  )
+        Bac_ManWriteBac( pFileName, p );
+    else 
+    {
+        printf( "Unrecognized output file extension.\n" );
+        return 0;
+    }
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_write [-apvh]\n" );
+    Abc_Print( -2, "\t         writes the design into a file in BLIF or Verilog\n" );
+    Abc_Print( -2, "\t-a     : toggle using assign-statement for primitives [default = %s]\n",  fUseAssign? "yes": "no" );
+    Abc_Print( -2, "\t-p     : toggle using Ptr construction (mapped Verilog only) [default = %s]\n", fUsePtr? "yes": "no" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandPs( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * p = Bac_AbcGetMan(pAbc);
+    int c, nModules = 0, fVerbose  = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "Mvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'M':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            nModules = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( nModules < 0 )
+                goto usage;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandPs(): There is no current design.\n" );
+        return 0;
+    }
+    Bac_ManPrintStats( p, nModules, fVerbose );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_ps [-M num] [-vh]\n" );
+    Abc_Print( -2, "\t         prints statistics\n" );
+    Abc_Print( -2, "\t-M num : the number of first modules to report [default = %d]\n", nModules );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandPut( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * p = Bac_AbcGetMan(pAbc);
+    Gia_Man_t * pGia = NULL;
+    int c, fBarBufs = 1, fVerbose  = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "bvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'b':
+            fBarBufs ^= 1;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandPut(): There is no current design.\n" );
+        return 0;
+    }
+    pGia = Bac_ManExtract( p, fBarBufs, fVerbose );
+    if ( pGia == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandPut(): Conversion to AIG has failed.\n" );
+        return 0;
+    }
+    Abc_FrameUpdateGia( pAbc, pGia );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_put [-bvh]\n" );
+    Abc_Print( -2, "\t         extracts AIG from the hierarchical design\n" );
+    Abc_Print( -2, "\t-b     : toggle using barrier buffers [default = %s]\n", fBarBufs? "yes": "no" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandGet( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * pNew = NULL, * p = Bac_AbcGetMan(pAbc);
+    int c, fMapped = 0, fVerbose  = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "mvh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'm':
+            fMapped ^= 1;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandGet(): There is no current design.\n" );
+        return 0;
+    }
+    if ( fMapped )
+    {
+        if ( pAbc->pNtkCur == NULL )
+        {
+            Abc_Print( 1, "Bac_CommandGet(): There is no current mapped design.\n" );
+            return 0;
+        }
+        pNew = (Bac_Man_t *)Bac_ManInsertAbc( p, pAbc->pNtkCur );
+    }
+    else
+    {
+        if ( pAbc->pGia == NULL )
+        {
+            Abc_Print( 1, "Bac_CommandGet(): There is no current AIG.\n" );
+            return 0;
+        }
+        pNew = Bac_ManInsertGia( p, pAbc->pGia );
+    }
+    Bac_AbcUpdateMan( pAbc, pNew );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_get [-mvh]\n" );
+    Abc_Print( -2, "\t         inserts AIG or mapped network into the hierarchical design\n" );
+    Abc_Print( -2, "\t-m     : toggle using mapped network from main-space [default = %s]\n", fMapped? "yes": "no" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandClp( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * pNew = NULL, * p = Bac_AbcGetMan(pAbc);
+    int c, fVerbose  = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandGet(): There is no current design.\n" );
+        return 0;
+    }
+    pNew = Bac_ManCollapse( p );
+    Bac_AbcUpdateMan( pAbc, pNew );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_clp [-vh]\n" );
+    Abc_Print( -2, "\t         collapses the current hierarchical design\n" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandCec( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Bac_Man_t * p = Bac_AbcGetMan(pAbc);
+    Gia_Man_t * pFirst, * pSecond, * pMiter;
+    Cec_ParCec_t ParsCec, * pPars = &ParsCec;
+    Vec_Ptr_t * vDes;
+    char * FileName, * pStr, ** pArgvNew;
+    int c, nArgcNew, fDumpMiter = 0;
+    FILE * pFile;
+    Cec_ManCecSetDefaultParams( pPars );
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'v':
+            pPars->fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandCec(): There is no current design.\n" );
+        return 0;
+    }
+    pArgvNew = argv + globalUtilOptind;
+    nArgcNew = argc - globalUtilOptind;
+    if ( nArgcNew != 1 )
+    {
+        if ( p->pSpec == NULL )
+        {
+            Abc_Print( -1, "File name is not given on the command line.\n" );
+            return 1;
+        }
+        FileName = p->pSpec;
+    }
+    else
+        FileName = pArgvNew[0];
+    // fix the wrong symbol
+    for ( pStr = FileName; *pStr; pStr++ )
+        if ( *pStr == '>' )
+            *pStr = '\\';
+    if ( (pFile = fopen( FileName, "r" )) == NULL )
+    {
+        Abc_Print( -1, "Cannot open input file \"%s\". ", FileName );
+        if ( (FileName = Extra_FileGetSimilarName( FileName, ".v", ".blif", NULL, NULL, NULL )) )
+            Abc_Print( 1, "Did you mean \"%s\"?", FileName );
+        Abc_Print( 1, "\n" );
+        return 1;
+    }
+    fclose( pFile );
+
+    // extract AIG from the current design
+    pFirst = Bac_ManExtract( p, 0, 0 );
+    if ( pFirst == NULL )
+    {
+        Abc_Print( -1, "Extracting AIG from the current design has failed.\n" );
+        return 0;
+    }
+    // extract AIG from the second design
+    if ( !strcmp( Extra_FileNameExtension(FileName), "blif" )  )
+        vDes = Psr_ManReadBlif( FileName );
+    else if ( !strcmp( Extra_FileNameExtension(FileName), "v" )  )
+        vDes = Psr_ManReadVerilog( FileName );
+    else assert( 0 );
+    p = Psr_ManBuildCba( FileName, vDes );
+    Psr_ManVecFree( vDes );
+    pSecond = Bac_ManExtract( p, 0, 0 );
+    Bac_ManFree( p );
+    if ( pSecond == NULL )
+    {
+        Gia_ManStop( pFirst );
+        Abc_Print( -1, "Extracting AIG from the original design has failed.\n" );
+        return 0;
+    }
+    // compute the miter
+    pMiter = Gia_ManMiter( pFirst, pSecond, 0, 1, 0, 0, pPars->fVerbose );
+    if ( pMiter )
+    {
+        if ( fDumpMiter )
+        {
+            Abc_Print( 0, "The verification miter is written into file \"%s\".\n", "cec_miter.aig" );
+            Gia_AigerWrite( pMiter, "cec_miter.aig", 0, 0 );
+        }
+        pAbc->Status = Cec_ManVerify( pMiter, pPars );
+        //Abc_FrameReplaceCex( pAbc, &pAbc->pGia->pCexComb );
+        Gia_ManStop( pMiter );
+    }
+    Gia_ManStop( pFirst );
+    Gia_ManStop( pSecond );
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_cec [-vh]\n" );
+    Abc_Print( -2, "\t         combinational equivalence checking\n" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function********************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+******************************************************************************/
+int Bac_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    extern void Psr_ManReadBlifTest();
+    extern void Psr_ManReadVerilogTest();
+    extern void Psr_SmtReadSmtTest();
+    //Bac_Man_t * p = Bac_AbcGetMan(pAbc);
+    int c, fVerbose  = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+/*
+    if ( p == NULL )
+    {
+        Abc_Print( 1, "Bac_CommandTest(): There is no current design.\n" );
+        return 0;
+    }
+*/
+    //Bac_PtrTransformTestTest();
+    //Psr_ManReadVerilogTest();
+    //Psr_SmtReadSmtTest();
+    return 0;
+usage:
+    Abc_Print( -2, "usage: @_test [-vh]\n" );
+    Abc_Print( -2, "\t         experiments with word-level networks\n" );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/cba/cbaLib.c b/src/base/bac/bacLib.c
index 04f7adfb..b2a16eb6 100644
--- a/src/base/cba/cbaLib.c
+++ b/src/base/bac/bacLib.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaLib.c]
+  FileName    [bacLib.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,11 +14,11 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaLib.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacLib.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
+#include "bac.h"
 
 ABC_NAMESPACE_IMPL_START
 
diff --git a/src/base/bac/bacNtk.c b/src/base/bac/bacNtk.c
new file mode 100644
index 00000000..4d2cd665
--- /dev/null
+++ b/src/base/bac/bacNtk.c
@@ -0,0 +1,604 @@
+/**CFile****************************************************************
+
+  FileName    [bacNtk.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Netlist manipulation.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacNtk.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+typedef struct Bac_Pair_t_ Bac_Pair_t;
+struct Bac_Pair_t_
+{
+    Bac_ObjType_t Type;
+    char *        pName;
+    char *        pSymb;
+};
+static const char * s_Pref = "ABC_";
+static Bac_Pair_t s_Types[BAC_BOX_UNKNOWN] =
+{ 
+    { BAC_OBJ_NONE,     "NONE",    NULL    },
+    { BAC_OBJ_PI,       "PI",      NULL    },
+    { BAC_OBJ_PO,       "PO",      NULL    },
+    { BAC_OBJ_BI,       "BI",      NULL    },
+    { BAC_OBJ_BO,       "BO",      NULL    },
+    { BAC_OBJ_BOX,      "BOX",     NULL    },
+    
+    { BAC_BOX_CF,       "CF",      "o"     },
+    { BAC_BOX_CT,       "CT",      "o"     }, 
+    { BAC_BOX_CX,       "CX",      "o"     }, 
+    { BAC_BOX_CZ,       "CZ",      "o"     },
+    { BAC_BOX_BUF,      "BUF",     "ao"    },
+    { BAC_BOX_INV,      "INV",     "ao"    },
+    { BAC_BOX_AND,      "AND",     "abo"   },
+    { BAC_BOX_NAND,     "NAND",    "abo"   },
+    { BAC_BOX_OR,       "OR",      "abo"   },
+    { BAC_BOX_NOR,      "NOR",     "abo"   },
+    { BAC_BOX_XOR,      "XOR",     "abo"   },
+    { BAC_BOX_XNOR,     "XNOR",    "abo"   },
+    { BAC_BOX_SHARP,    "SHARP",   "abo"   },
+    { BAC_BOX_SHARPL,   "SHARPL",  "abo"   },
+    { BAC_BOX_MUX,      "MUX",     "cabo"  },
+    { BAC_BOX_MAJ,      "MAJ",     "abco"  },
+    
+    { BAC_BOX_RAND,     "RAND",    "ao"    },
+    { BAC_BOX_RNAND,    "RNAND",   "ao"    },
+    { BAC_BOX_ROR,      "ROR",     "ao"    },
+    { BAC_BOX_RNOR,     "RNOR",    "ao"    },
+    { BAC_BOX_RXOR,     "RXOR",    "ao"    },
+    { BAC_BOX_RXNOR,    "RXNOR",   "ao"    },
+    
+    { BAC_BOX_LAND,     "LAND",    "abo"   },
+    { BAC_BOX_LNAND,    "LNAND",   "abo"   },
+    { BAC_BOX_LOR,      "LOR",     "abo"   },
+    { BAC_BOX_LNOR,     "LNOR",    "abo"   },
+    { BAC_BOX_LXOR,     "LXOR",    "abo"   },
+    { BAC_BOX_LXNOR,    "LXNOR",   "abo"   },
+    
+    { BAC_BOX_NMUX,     "NMUX",    "abo"   },
+    { BAC_BOX_SEL,      "SEL",     "abo"   },
+    { BAC_BOX_PSEL,     "PSEL",    "iabo"  },
+    { BAC_BOX_ENC,      "ENC",     "ao"    },
+    { BAC_BOX_PENC,     "PENC",    "ao"    },
+    { BAC_BOX_DEC,      "DEC",     "ao"    },
+    { BAC_BOX_EDEC,     "EDEC",    "abo"   },
+    
+    { BAC_BOX_ADD,      "ADD",     "iabso" },
+    { BAC_BOX_SUB,      "SUB",     "abo"   },
+    { BAC_BOX_MUL,      "MUL",     "abo"   },
+    { BAC_BOX_DIV,      "DIV",     "abo"   },
+    { BAC_BOX_MOD,      "MOD",     "abo"   },
+    { BAC_BOX_REM,      "REM",     "abo"   },
+    { BAC_BOX_POW,      "POW",     "abo"   },
+    { BAC_BOX_MIN,      "MIN",     "ao"    },
+    { BAC_BOX_ABS,      "ABS",     "ao"    },
+
+    { BAC_BOX_LTHAN,    "LTHAN",   "iabo"  },
+    { BAC_BOX_LETHAN,   "LETHAN",  "abo"   },
+    { BAC_BOX_METHAN,   "METHAN",  "abo"   },
+    { BAC_BOX_MTHAN,    "MTHAN",   "abo"   },
+    { BAC_BOX_EQU,      "EQU",     "abo"   },
+    { BAC_BOX_NEQU,     "NEQU",    "abo"   },
+    
+    { BAC_BOX_SHIL,     "SHIL",    "abo"   },
+    { BAC_BOX_SHIR,     "SHIR",    "abo"   },
+    { BAC_BOX_ROTL,     "ROTL",    "abo"   },
+    { BAC_BOX_ROTR,     "ROTR",    "abo"   },
+
+    { BAC_BOX_GATE,     "GATE",    "io"    },
+    { BAC_BOX_LUT,      "LUT",     "io"    },
+    { BAC_BOX_ASSIGN,   "ASSIGN",  "abo"   },
+    
+    { BAC_BOX_TRI,      "TRI",     "abo"   },
+    { BAC_BOX_RAM,      "RAM",     "eadro" },
+    { BAC_BOX_RAMR,     "RAMR",    "eamo"  },
+    { BAC_BOX_RAMW,     "RAMW",    "eado"  },
+    { BAC_BOX_RAMWC,    "RAMWC",   "ceado" },
+    { BAC_BOX_RAMBOX,   "RAMBOX",  "io"    },
+    
+    { BAC_BOX_LATCH,    "LATCH",   "dvsgq" },
+    { BAC_BOX_LATCHRS,  "LATCHRS", "dsrgq" },
+    { BAC_BOX_DFF,      "DFF",     "dvscq" },
+    { BAC_BOX_DFFRS,    "DFFRS",   "dsrcq" }
+}; 
+static inline int Bac_GetTypeId( Bac_ObjType_t Type )
+{
+    int i;
+    for ( i = 1; i < BAC_BOX_UNKNOWN; i++ )
+        if ( s_Types[i].Type == Type )
+            return i;
+    return -1;
+}
+void Bac_ManSetupTypes( char ** pNames, char ** pSymbs )
+{
+    Bac_ObjType_t Type;
+    for ( Type = 1; Type < BAC_BOX_UNKNOWN; Type++ )
+    {
+        int Id = Bac_GetTypeId( Type );
+        pNames[Type] = s_Types[Id].pName;
+        pSymbs[Type] = s_Types[Id].pSymb;
+    }
+}
+
+char * Bac_NtkGenerateName( Bac_Ntk_t * p, Bac_ObjType_t Type, Vec_Int_t * vBits )
+{
+    static char Buffer[100]; 
+    char * pTemp; int i, Bits;
+    char * pName = Bac_ManPrimName( p->pDesign, Type );
+    char * pSymb = Bac_ManPrimSymb( p->pDesign, Type );
+    assert( Vec_IntSize(vBits) == (int)strlen(pSymb) );
+    sprintf( Buffer, "%s%s_", s_Pref, pName );
+    pTemp = Buffer + strlen(Buffer);
+    Vec_IntForEachEntry( vBits, Bits, i )
+    {
+        sprintf( pTemp, "%c%d", pSymb[i], Bits );
+        pTemp += strlen(pTemp);
+    }
+    //Vec_IntPrint( vBits );
+    //printf( "%s\n", Buffer );
+    return Buffer;
+}
+
+Bac_ObjType_t Bac_NameToType( char * pName )
+{
+    Bac_ObjType_t i;
+    if ( strncmp(pName, s_Pref, strlen(s_Pref)) )
+        return 0;
+    pName += strlen(s_Pref);
+    for ( i = 1; i < BAC_BOX_UNKNOWN; i++ )
+        if ( !strncmp(pName, s_Types[i].pName, strlen(s_Types[i].pName)) )
+            return s_Types[i].Type;
+    return 0;
+}
+Vec_Int_t * Bac_NameToRanges( char * pName )
+{
+    static Vec_Int_t Bits, * vBits = &Bits;
+    static int pArray[10];
+    char * pTemp; 
+    int Num = 0, Count = 0;
+    // initialize array
+    vBits->pArray = pArray;
+    vBits->nSize = 0;
+    vBits->nCap = 10;
+    // check the name
+    assert( !strncmp(pName, s_Pref, strlen(s_Pref)) );
+    for ( pTemp = pName; *pTemp && !Bac_CharIsDigit(*pTemp); pTemp++ );
+    assert( Bac_CharIsDigit(*pTemp) );
+    for ( ; *pTemp; pTemp++ )
+    {
+        if ( Bac_CharIsDigit(*pTemp) )
+            Num = 10 * Num + *pTemp - '0';
+        else
+            Vec_IntPush( vBits, Num ), Count += Num, Num = 0;
+    }
+    assert( Num > 0 );
+    Vec_IntPush( vBits, Num );  Count += Num;
+    assert( Vec_IntSize(vBits) <= 10 );
+    return vBits;
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Replaces fanin iOld by iNew in all fanouts.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_NtkUpdateFanout( Bac_Ntk_t * p, int iOld, int iNew )
+{
+    int iCo;
+    assert( Bac_ObjIsCi(p, iOld) );
+    assert( Bac_ObjIsCi(p, iNew) );
+    Bac_ObjForEachFanout( p, iOld, iCo )
+    {
+        assert( Bac_ObjFanin(p, iCo) == iOld );
+        Bac_ObjCleanFanin( p, iCo );
+        Bac_ObjSetFanin( p, iCo, iNew );
+    }
+    Bac_ObjSetFanout( p, iNew, Bac_ObjFanout(p, iOld) );
+    Bac_ObjSetFanout( p, iOld, 0 );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Derives fanout.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_NtkDeriveFanout( Bac_Ntk_t * p )
+{
+    int iCi, iCo;
+    assert( !Bac_NtkHasFanouts(p) );
+    Bac_NtkStartFanouts( p );
+    Bac_NtkForEachCo( p, iCo )
+    {
+        assert( !Bac_ObjNextFanout(p, iCo) );
+        iCi = Bac_ObjFanin(p, iCo);
+        if ( Bac_ObjFanout(p, iCi) )
+            Bac_ObjSetNextFanout( p, Bac_ObjFanout(p, iCi), iCo );
+        Bac_ObjSetFanout( p, iCi, iCo );
+    }
+    Bac_NtkForEachCo( p, iCo )
+        if ( !Bac_ObjNextFanout(p, iCo) )
+            Bac_ObjSetFanout( p, Bac_ObjFanin(p, iCo), iCo );
+}
+void Bac_ManDeriveFanout( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_NtkDeriveFanout( pNtk );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Assigns word-level names.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Bac_ManAssignInternTwo( Bac_Ntk_t * p, int iNum, int nDigits, char * pPref, Vec_Int_t * vMap )
+{
+    char Buffer[16]; int i, NameId = 0;
+    for ( i = 0; !NameId || Vec_IntEntry(vMap, NameId); i++ )
+    {
+        if ( i == 0 )
+            sprintf( Buffer, "%s%0*d", pPref, nDigits, iNum );
+        else
+            sprintf( Buffer, "%s%0*d_%d", pPref, nDigits, iNum, i );
+        NameId = Abc_NamStrFindOrAdd( p->pDesign->pStrs, Buffer, NULL );
+    }
+    Vec_IntWriteEntry( vMap, NameId, 1 );
+    return NameId;
+}
+int Bac_ManAssignCountNames( Bac_Ntk_t * p )
+{
+    int i, iObj, iBox, Count = 0;
+    Bac_NtkForEachPiMain( p, iObj, i )
+        if ( !Bac_ObjNameInt(p, iObj) )
+            Count++;
+    Bac_NtkForEachBox( p, iBox )
+        Bac_BoxForEachBoMain( p, iBox, iObj, i )
+            if ( !Bac_ObjNameInt(p, iObj) )
+                Count++;
+    return Count;
+}
+void Bac_ManAssignInternWordNamesNtk( Bac_Ntk_t * p, Vec_Int_t * vMap )
+{
+    int k, iObj, iTerm, iName = -1, iBit = -1;
+    int nDigits, nPis = 0, nPos = 0, nNames = 1;
+    // start names
+    if ( !Bac_NtkHasNames(p) )
+        Bac_NtkStartNames(p);
+    nDigits = Abc_Base10Log( Bac_ManAssignCountNames(p) );
+    // populate map with the currently used names
+    Bac_NtkForEachCi( p, iObj )
+        if ( Bac_ObjNameInt(p, iObj) )
+            Vec_IntWriteEntry( vMap, Bac_ObjNameId(p, iObj), 1 );
+    Bac_NtkForEachBox( p, iObj )
+        if ( Bac_ObjNameInt(p, iObj) )
+            Vec_IntWriteEntry( vMap, Bac_ObjNameId(p, iObj), 1 );
+    // assign CI names
+    Bac_NtkForEachCi( p, iObj )
+    {
+        if ( Bac_ObjNameInt(p, iObj) )
+        {
+            iName = -1;
+            iBit = -1;
+            continue;
+        }
+        if ( Bac_ObjBit(p, iObj) )
+        {
+            assert( iBit > 0 );
+            Bac_ObjSetName( p, iObj, Abc_Var2Lit2(iBit++, BAC_NAME_INDEX) );
+        }
+        else
+        {
+            //int Type = Bac_ObjType(p, iObj);
+            int Range = Bac_ObjIsPi(p, iObj) ? Bac_ObjPiRange(p, iObj) : Bac_BoxBoRange(p, iObj);
+            iName = Bac_ManAssignInternTwo( p, nNames++, nDigits, (char*)(Bac_ObjIsPi(p, iObj) ? "i":"n"), vMap );
+            if ( Range == 1 )
+                Bac_ObjSetName( p, iObj, Abc_Var2Lit2(iName, BAC_NAME_BIN) );
+            else
+                Bac_ObjSetName( p, iObj, Abc_Var2Lit2(iName, BAC_NAME_WORD) );
+            iBit = 1;
+        }
+    }
+    // transfer names to the interface
+    if ( Bac_NtkInfoNum(p) )
+    {
+        for ( k = 0; k < Bac_NtkInfoNum(p); k++ )
+        {
+            //char * pName = Bac_NtkName(p);
+            if ( Bac_NtkInfoType(p, k) == 1 ) // PI
+            {
+                iObj = Bac_NtkPi(p, nPis);
+                assert( !Bac_ObjBit(p, iObj) );
+                assert( Bac_ObjNameType(p, iObj) <= BAC_NAME_WORD );
+                Bac_NtkSetInfoName( p, k, Abc_Var2Lit2(Bac_ObjNameId(p, iObj), 1) );
+                nPis += Bac_NtkInfoRange(p, k);
+            }
+            else if ( Bac_NtkInfoType(p, k) == 2 ) // PO
+            {
+                iObj = Bac_NtkPo(p, nPos);
+                assert( !Bac_ObjBit(p, iObj) );
+                iObj = Bac_ObjFanin(p, iObj);
+                assert( Bac_ObjNameType(p, iObj) <= BAC_NAME_WORD );
+                Bac_NtkSetInfoName( p, k, Abc_Var2Lit2(Bac_ObjNameId(p, iObj), 2) );
+                nPos += Bac_NtkInfoRange(p, k);
+            }
+            else assert( 0 );
+        }
+        assert( nPis == Bac_NtkPiNum(p) );
+        assert( nPos == Bac_NtkPoNum(p) );
+    }
+    // assign instance names
+    nDigits = Abc_Base10Log( Bac_NtkObjNum(p) );
+    Bac_NtkForEachBox( p, iObj )
+        if ( !Bac_ObjNameInt(p, iObj) )
+        {
+            iName = Bac_ManAssignInternTwo( p, iObj, nDigits, "g", vMap );
+            Bac_ObjSetName( p, iObj, Abc_Var2Lit2(iName, BAC_NAME_BIN) );
+        }
+    // unmark all names
+    Bac_NtkForEachPi( p, iObj, k )
+        if ( Bac_ObjNameType(p, iObj) <= BAC_NAME_WORD )
+            Vec_IntWriteEntry( vMap, Bac_ObjNameId(p, iObj), 0 );
+    Bac_NtkForEachBox( p, iObj )
+    {
+        Vec_IntWriteEntry( vMap, Bac_ObjNameId(p, iObj), 0 );
+        Bac_BoxForEachBo( p, iObj, iTerm, k )
+            if ( Bac_ObjNameType(p, iTerm) <= BAC_NAME_WORD )
+                Vec_IntWriteEntry( vMap, Bac_ObjNameId(p, iTerm), 0 );
+    }
+//    printf( "Generated %d word-level names.\n", nNames-1 );
+}
+void Bac_ManAssignInternWordNames( Bac_Man_t * p )
+{
+    Vec_Int_t * vMap = Vec_IntStart( 2*Bac_ManObjNum(p) );
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_ManAssignInternWordNamesNtk( pNtk, vMap );
+    assert( Vec_IntCountEntry(vMap, 0) == Vec_IntSize(vMap) );
+    Vec_IntFree( vMap );
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    [Count number of objects after collapsing.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Bac_ManClpObjNum_rec( Bac_Ntk_t * p )
+{
+    int i, Counter = 0;
+    if ( p->Count >= 0 )
+        return p->Count;
+    Bac_NtkForEachBox( p, i )
+        Counter += Bac_ObjIsBoxUser(p, i) ? Bac_ManClpObjNum_rec( Bac_BoxNtk(p, i) ) + 3*Bac_BoxBoNum(p, i) : Bac_BoxSize(p, i);
+    return (p->Count = Counter);
+}
+int Bac_ManClpObjNum( Bac_Man_t * p )
+{
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( p, pNtk, i )
+        pNtk->Count = -1;
+    return Bac_NtkPioNum( Bac_ManRoot(p) ) + Bac_ManClpObjNum_rec( Bac_ManRoot(p) );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Collects boxes in the DFS order.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_NtkDfs_rec( Bac_Ntk_t * p, int iObj, Vec_Int_t * vBoxes )
+{
+    int k, iFanin;
+    if ( Bac_ObjIsBo(p, iObj) == 1 )
+    {
+        Bac_NtkDfs_rec( p, Bac_ObjFanin(p, iObj), vBoxes );
+        return;
+    }
+    assert( Bac_ObjIsPi(p, iObj) || Bac_ObjIsBox(p, iObj) );
+    if ( Bac_ObjCopy(p, iObj) > 0 ) // visited
+        return;
+    Bac_ObjSetCopy( p, iObj, 1 );
+    Bac_BoxForEachFanin( p, iObj, iFanin, k )
+        Bac_NtkDfs_rec( p, iFanin, vBoxes );
+    Vec_IntPush( vBoxes, iObj );
+}
+Vec_Int_t * Bac_NtkDfs( Bac_Ntk_t * p )
+{
+    int i, iObj;
+    Vec_Int_t * vBoxes = Vec_IntAlloc( Bac_NtkBoxNum(p) );
+    Bac_NtkStartCopies( p ); // -1 = not visited; 1 = finished
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjSetCopy( p, iObj, 1 );
+    Bac_NtkForEachPo( p, iObj, i )
+        Bac_NtkDfs_rec( p, Bac_ObjFanin(p, iObj), vBoxes );
+    return vBoxes;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Collects user boxes in the DFS order.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Bac_NtkDfsUserBoxes_rec( Bac_Ntk_t * p, int iObj, Vec_Int_t * vBoxes )
+{
+    int k, iFanin;
+    assert( Bac_ObjIsBoxUser(p, iObj) );
+    if ( Bac_ObjCopy(p, iObj) == 1 ) // visited
+        return 1;
+    if ( Bac_ObjCopy(p, iObj) == 0 ) // loop
+        return 0;
+    Bac_ObjSetCopy( p, iObj, 0 );
+    Bac_BoxForEachFanin( p, iObj, iFanin, k )
+        if ( Bac_ObjIsBo(p, iFanin) && Bac_ObjIsBoxUser(p, Bac_ObjFanin(p, iFanin)) )
+            if ( !Bac_NtkDfsUserBoxes_rec( p, Bac_ObjFanin(p, iFanin), vBoxes ) )
+                return 0;
+    Vec_IntPush( vBoxes, iObj );
+    Bac_ObjSetCopy( p, iObj, 1 );
+    return 1;
+}
+int Bac_NtkDfsUserBoxes( Bac_Ntk_t * p )
+{
+    int iObj;
+    Bac_NtkStartCopies( p ); // -1 = not visited; 0 = on the path; 1 = finished
+    Vec_IntClear( &p->vArray );
+    Bac_NtkForEachBoxUser( p, iObj )
+        if ( !Bac_NtkDfsUserBoxes_rec( p, iObj, &p->vArray ) )
+        {
+            printf( "Cyclic dependency of user boxes is detected.\n" );
+            return 0;
+        }
+    return 1;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_NtkCollapse_rec( Bac_Ntk_t * pNew, Bac_Ntk_t * p, Vec_Int_t * vSigs )
+{
+    int i, iObj, iObjNew, iTerm;
+    Bac_NtkStartCopies( p );
+    // set PI copies
+    assert( Vec_IntSize(vSigs) == Bac_NtkPiNum(p) );
+    Bac_NtkForEachPi( p, iObj, i )
+        Bac_ObjSetCopy( p, iObj, Vec_IntEntry(vSigs, i) );
+    // duplicate internal objects and create buffers for hierarchy instances
+    Bac_NtkForEachBox( p, iObj )
+        if ( Bac_ObjIsBoxPrim( p, iObj ) )
+            Bac_BoxDup( pNew, p, iObj );
+        else
+        {
+            Bac_BoxForEachBo( p, iObj, iTerm, i )
+            {
+                iObjNew = Bac_ObjAlloc( pNew, BAC_OBJ_BI,  -1 );
+                iObjNew = Bac_ObjAlloc( pNew, BAC_BOX_BUF, -1 ); // buffer
+                iObjNew = Bac_ObjAlloc( pNew, BAC_OBJ_BO,  -1 );
+                Bac_ObjSetCopy( p, iTerm, iObjNew );
+            }
+        }
+    // duplicate user modules and connect objects
+    Bac_NtkForEachBox( p, iObj )
+        if ( Bac_ObjIsBoxPrim( p, iObj ) )
+        {
+            Bac_BoxForEachBi( p, iObj, iTerm, i )
+                Bac_ObjSetFanin( pNew, Bac_ObjCopy(p, iTerm), Bac_ObjCopy(p, Bac_ObjFanin(p, iTerm)) );
+        }
+        else
+        {
+            Vec_IntClear( vSigs );
+            Bac_BoxForEachBi( p, iObj, iTerm, i )
+                Vec_IntPush( vSigs, Bac_ObjCopy(p, Bac_ObjFanin(p, iTerm)) );
+            Bac_NtkCollapse_rec( pNew, Bac_BoxNtk(p, iObj), vSigs );
+            assert( Vec_IntSize(vSigs) == Bac_BoxBoNum(p, iObj) );
+            Bac_BoxForEachBo( p, iObj, iTerm, i )
+                Bac_ObjSetFanin( pNew, Bac_ObjCopy(p, iTerm)-2, Vec_IntEntry(vSigs, i) );
+        }
+    // collect POs
+    Vec_IntClear( vSigs );
+    Bac_NtkForEachPo( p, iObj, i )
+        Vec_IntPush( vSigs, Bac_ObjCopy(p, Bac_ObjFanin(p, iObj)) );
+}
+Bac_Man_t * Bac_ManCollapse( Bac_Man_t * p )
+{
+    int i, iObj;
+    Vec_Int_t * vSigs = Vec_IntAlloc( 1000 );
+    Bac_Man_t * pNew = Bac_ManStart( p, 1 );
+    Bac_Ntk_t * pRoot = Bac_ManRoot( p );
+    Bac_Ntk_t * pRootNew = Bac_ManRoot( pNew );
+    Bac_NtkAlloc( pRootNew, Bac_NtkNameId(pRoot), Bac_NtkPiNum(pRoot), Bac_NtkPoNum(pRoot), Bac_ManClpObjNum(p) );
+    if ( Vec_IntSize(&pRoot->vInfo) )
+        Vec_IntAppend( &pRootNew->vInfo, &pRoot->vInfo );
+    Bac_NtkForEachPi( pRoot, iObj, i )
+        Vec_IntPush( vSigs, Bac_ObjAlloc(pRootNew, BAC_OBJ_PI, -1) );
+    Bac_NtkCollapse_rec( pRootNew, pRoot, vSigs );
+    assert( Vec_IntSize(vSigs) == Bac_NtkPoNum(pRoot) );
+    Bac_NtkForEachPo( pRoot, iObj, i )
+        Bac_ObjAlloc( pRootNew, BAC_OBJ_PO, Vec_IntEntry(vSigs, i) );
+    assert( Bac_NtkObjNum(pRootNew) == Bac_NtkObjNumAlloc(pRootNew) );
+    Vec_IntFree( vSigs );
+    // transfer PI/PO names
+    if ( Bac_NtkHasNames(pRoot) )
+    {
+        Bac_NtkStartNames( pRootNew );
+        Bac_NtkForEachPi( pRoot, iObj, i )
+            Bac_ObjSetName( pRootNew, Bac_NtkPi(pRootNew, i), Bac_ObjName(pRoot, iObj) );
+        Bac_NtkForEachPoDriver( pRoot, iObj, i )
+            if ( !Bac_ObjIsPi(pRoot, iObj) )
+                Bac_ObjSetName( pRootNew, Bac_ObjCopy(pRoot, iObj), Bac_ObjName(pRoot, iObj) );
+    }
+    return pNew;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/cba/cbaOper.c b/src/base/bac/bacOper.c
index b39618b7..0550eca6 100644
--- a/src/base/cba/cbaOper.c
+++ b/src/base/bac/bacOper.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaOper.c]
+  FileName    [bacOper.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,11 +14,11 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaOper.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacOper.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
+#include "bac.h"
 
 ABC_NAMESPACE_IMPL_START
 
@@ -41,75 +41,75 @@ ABC_NAMESPACE_IMPL_START
   SeeAlso     []
 
 ***********************************************************************/
-int Cba_BoxCreate( Cba_Ntk_t * p, Cba_ObjType_t Type, Vec_Int_t * vFanins, int nInA, int nInB, int nOuts )
+int Bac_BoxCreate( Bac_Ntk_t * p, Bac_ObjType_t Type, Vec_Int_t * vFanins, int nInA, int nInB, int nOuts )
 {
     char pName[100]; int i, iObj, iFanin;
-    assert( CBA_OBJ_BOX < Type && Type < CBA_BOX_UNKNOWN );
-    if ( CBA_BOX_CF <= Type && Type <= CBA_BOX_CZ )
+    assert( BAC_OBJ_BOX < Type && Type < BAC_BOX_UNKNOWN );
+    if ( BAC_BOX_CF <= Type && Type <= BAC_BOX_CZ )
     {
         sprintf( pName, "ABCCTo%d", nOuts );
         assert( 0 == Vec_IntSize(vFanins) );
-        iObj = Cba_BoxAlloc( p, Type, 0, nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        iObj = Bac_BoxAlloc( p, Type, 0, nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( CBA_BOX_BUF <= Type && Type <= CBA_BOX_INV )
+    else if ( BAC_BOX_BUF <= Type && Type <= BAC_BOX_INV )
     {
         char * pPref[2] = { "ABCBUF", "ABCINV" };
         assert( nInA == nOuts );
         assert( nInA == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sa%do%d", pPref[Type - CBA_BOX_BUF], nInA, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sa%do%d", pPref[Type - BAC_BOX_BUF], nInA, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( CBA_BOX_AND <= Type && Type <= CBA_BOX_XNOR )
+    else if ( BAC_BOX_AND <= Type && Type <= BAC_BOX_XNOR )
     {
         char * pPref[6] = { "ABCAND", "ABCNAND", "ABCOR", "ABCNOR", "ABCXOR", "ABCXNOR" };
         assert( nInA == nOuts && nInB == nOuts );
         assert( nInA + nInB == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sa%db%do%d", pPref[Type - CBA_BOX_AND], nInA, nInB, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sa%db%do%d", pPref[Type - BAC_BOX_AND], nInA, nInB, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( Type == CBA_BOX_MUX )
+    else if ( Type == BAC_BOX_MUX )
     {
         char * pPref[1] = { "ABCMUX" };
         assert( nInA == nOuts && nInB == nOuts );
         assert( 1 + nInA + nInB == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sc%da%db%do%d", pPref[Type - CBA_BOX_MUX], 1, nInA, nInB, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sc%da%db%do%d", pPref[Type - BAC_BOX_MUX], 1, nInA, nInB, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( Type == CBA_BOX_MAJ )
+    else if ( Type == BAC_BOX_MAJ )
     {
         char * pPref[1] = { "ABCMAJ" };
         assert( nInA == 1 && nInB == 1 && nOuts == 1 );
         assert( 3 == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sa%db%dc%do%d", pPref[Type - CBA_BOX_MAJ], 1, 1, 1, 1 );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sa%db%dc%do%d", pPref[Type - BAC_BOX_MAJ], 1, 1, 1, 1 );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( CBA_BOX_RAND <= Type && Type <= CBA_BOX_RXNOR )
+    else if ( BAC_BOX_RAND <= Type && Type <= BAC_BOX_RXNOR )
     {
         char * pPref[6] = { "ABCRAND", "ABCRNAND", "ABCROR", "ABCRNOR", "ABCRXOR", "ABCRXNOR" };
         assert( nInA == nInB && 1 == nOuts );
         assert( nInA + nInB == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sa%db%do%d", pPref[Type - CBA_BOX_RAND], nInA, nInB, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sa%db%do%d", pPref[Type - BAC_BOX_RAND], nInA, nInB, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( Type == CBA_BOX_SEL )
+    else if ( Type == BAC_BOX_SEL )
     {
         char * pPref[1] = { "ABCSEL" };
         assert( nInA * nOuts == nInB );
         assert( nInA + nInB == Vec_IntSize(vFanins) );
-        sprintf( pName, "%sa%db%do%d", pPref[Type - CBA_BOX_SEL], nInA, nInB, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%sa%db%do%d", pPref[Type - BAC_BOX_SEL], nInA, nInB, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
-    else if ( Type == CBA_BOX_PSEL )
+    else if ( Type == BAC_BOX_PSEL )
     {
         char * pPref[1] = { "ABCPSEL" };
         assert( nInA * nOuts == nInB );
         assert( 1 + nInA + nInB == Vec_IntSize(vFanins) );
-        sprintf( pName, "%si%da%db%do%d", pPref[Type - CBA_BOX_SEL], 1, nInA, nInB, nOuts );
-        iObj = Cba_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
+        sprintf( pName, "%si%da%db%do%d", pPref[Type - BAC_BOX_SEL], 1, nInA, nInB, nOuts );
+        iObj = Bac_BoxAlloc( p, Type, Vec_IntSize(vFanins), nOuts, Abc_NamStrFindOrAdd(p->pDesign->pMods, pName, NULL) );
     }
     // add fanins
     Vec_IntForEachEntry( vFanins, iFanin, i )
-        Cba_ObjSetFanin( p, Cba_BoxBi(p, iObj, i), iFanin );
+        Bac_ObjSetFanin( p, Bac_BoxBi(p, iObj, i), iFanin );
     return iObj;
 }
 
@@ -124,45 +124,45 @@ int Cba_BoxCreate( Cba_Ntk_t * p, Cba_ObjType_t Type, Vec_Int_t * vFanins, int n
   SeeAlso     []
 
 ***********************************************************************/
-int Cba_ObjClpWide( Cba_Ntk_t * p, int iBox )
+int Bac_ObjClpWide( Bac_Ntk_t * p, int iBox )
 {
-    Cba_ObjType_t Type = Cba_ObjType( p, iBox );
-    int nBis = Cba_BoxBiNum(p, iBox);
-    int nBos = Cba_BoxBoNum(p, iBox);
+    Bac_ObjType_t Type = Bac_ObjType( p, iBox );
+    int nBis = Bac_BoxBiNum(p, iBox);
+    int nBos = Bac_BoxBoNum(p, iBox);
     int i, k, iObj;
     assert( nBos > 1 );
     Vec_IntClear( &p->vArray );
-    if ( CBA_BOX_BUF <= Type && Type <= CBA_BOX_INV )
+    if ( BAC_BOX_BUF <= Type && Type <= BAC_BOX_INV )
     {
         for ( i = 0; i < nBos; i++ )
         {
-            Vec_IntFill( &p->vArray2, 1, Cba_BoxFanin(p, iBox, i) );
-            iObj = Cba_BoxCreate( p, Type, &p->vArray2, 1, -1, 1 );
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, 0) );
+            Vec_IntFill( &p->vArray2, 1, Bac_BoxFanin(p, iBox, i) );
+            iObj = Bac_BoxCreate( p, Type, &p->vArray2, 1, -1, 1 );
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, 0) );
         }
     }
-    else if ( CBA_BOX_AND <= Type && Type <= CBA_BOX_XNOR )
+    else if ( BAC_BOX_AND <= Type && Type <= BAC_BOX_XNOR )
     {
         assert( nBis == 2 * nBos );
         for ( i = 0; i < nBos; i++ )
         {
-            Vec_IntFillTwo( &p->vArray2, 2, Cba_BoxFanin(p, iBox, i), Cba_BoxFanin(p, iBox, nBos+i) );
-            iObj = Cba_BoxCreate( p, Type, &p->vArray2, 1, 1, 1 );
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, 0) );
+            Vec_IntFillTwo( &p->vArray2, 2, Bac_BoxFanin(p, iBox, i), Bac_BoxFanin(p, iBox, nBos+i) );
+            iObj = Bac_BoxCreate( p, Type, &p->vArray2, 1, 1, 1 );
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, 0) );
         }
     }
-    else if ( Type == CBA_BOX_MUX )
+    else if ( Type == BAC_BOX_MUX )
     {
         assert( nBis - 1 == 2 * nBos );
         for ( i = 0; i < nBos; i++ )
         {
-            Vec_IntFill( &p->vArray2, 1, Cba_BoxFanin(p, iBox, 0) );
-            Vec_IntPushTwo( &p->vArray2, Cba_BoxFanin(p, iBox, 1+i), Cba_BoxFanin(p, iBox, 1+nBos+i) );
-            iObj = Cba_BoxCreate( p, Type, &p->vArray2, 1, 1, 1 );
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, 0) );
+            Vec_IntFill( &p->vArray2, 1, Bac_BoxFanin(p, iBox, 0) );
+            Vec_IntPushTwo( &p->vArray2, Bac_BoxFanin(p, iBox, 1+i), Bac_BoxFanin(p, iBox, 1+nBos+i) );
+            iObj = Bac_BoxCreate( p, Type, &p->vArray2, 1, 1, 1 );
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, 0) );
         }
     }
-    else if ( Type == CBA_BOX_NMUX )
+    else if ( Type == BAC_BOX_NMUX )
     {
         int n, nIns = nBis / nBos;
         assert( nBis % nBos == 0 );
@@ -174,27 +174,27 @@ int Cba_ObjClpWide( Cba_Ntk_t * p, int iBox )
         {
             Vec_IntClear( &p->vArray2 );
             for ( k = 0; k < n; k++ )
-                Vec_IntPush( &p->vArray2, Cba_BoxFanin(p, iBox, k) );
+                Vec_IntPush( &p->vArray2, Bac_BoxFanin(p, iBox, k) );
             for ( k = 0; k < (1 << n); k++ )
-                Vec_IntPush( &p->vArray2, Cba_BoxFanin(p, iBox, n + (1 << n) * i + k) );
-            iObj = Cba_BoxCreate( p, Type, &p->vArray2, n, (1 << n), 1 );
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, 0) );
+                Vec_IntPush( &p->vArray2, Bac_BoxFanin(p, iBox, n + (1 << n) * i + k) );
+            iObj = Bac_BoxCreate( p, Type, &p->vArray2, n, (1 << n), 1 );
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, 0) );
         }
     }
-    else if ( Type == CBA_BOX_SEL )
+    else if ( Type == BAC_BOX_SEL )
     {
     }
-    else if ( Type == CBA_BOX_PSEL )
+    else if ( Type == BAC_BOX_PSEL )
     {
     }
-    else if ( Type == CBA_BOX_DFF || Type == CBA_BOX_LATCH )
+    else if ( Type == BAC_BOX_DFF || Type == BAC_BOX_LATCH )
     {
     }
-    else if ( Type == CBA_BOX_DFFRS || Type == CBA_BOX_LATCHRS )
+    else if ( Type == BAC_BOX_DFFRS || Type == BAC_BOX_LATCHRS )
     {
     }
     else assert( 0 );
-    Cba_BoxReplace( p, iBox, Vec_IntArray(&p->vArray), Vec_IntSize(&p->vArray) );
+    Bac_BoxReplace( p, iBox, Vec_IntArray(&p->vArray), Vec_IntSize(&p->vArray) );
     return iBox;
 }
 
@@ -209,15 +209,15 @@ int Cba_ObjClpWide( Cba_Ntk_t * p, int iBox )
   SeeAlso     []
 
 ***********************************************************************/
-int Cba_ObjClpArith( Cba_Ntk_t * p, int iBox )
+int Bac_ObjClpArith( Bac_Ntk_t * p, int iBox )
 {
-    Cba_ObjType_t Type = Cba_ObjType( p, iBox );
+    Bac_ObjType_t Type = Bac_ObjType( p, iBox );
     int i, iObj = -1;
-    int nBis = 0;//Cba_NtkReadRangesPrim( Cba_BoxNtkName(p, iObj), &p->vArray, 0 );
-    assert( nBis == Cba_BoxBiNum(p, iBox) );
-    if ( Type == CBA_BOX_ADD )
+    int nBis = 0;//Bac_NtkReadRangesPrim( Bac_BoxNtkName(p, iObj), &p->vArray, 0 );
+    assert( nBis == Bac_BoxBiNum(p, iBox) );
+    if ( Type == BAC_BOX_ADD )
     {
-        int Carry = Cba_BoxFanin(p, iBox, 0);
+        int Carry = Bac_BoxFanin(p, iBox, 0);
         int nBits = Vec_IntEntry(&p->vArray, 1);
         assert( Vec_IntSize(&p->vArray) == 3 );
         assert( Vec_IntEntry(&p->vArray, 0) == 1 );
@@ -226,14 +226,14 @@ int Cba_ObjClpArith( Cba_Ntk_t * p, int iBox )
         for ( i = 0; i < nBits; i++ )
         {
             Vec_IntFill( &p->vArray2, 1, Carry );
-            Vec_IntPushTwo( &p->vArray2, Cba_BoxFanin(p, iBox, 1+i), Cba_BoxFanin(p, iBox, 1+nBits+i) );
-            iObj = Cba_BoxCreate( p, CBA_BOX_ADD, &p->vArray2, 1, 1, 1 );
-            Carry = Cba_BoxBo(p, iObj, 1);
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, 0) );
+            Vec_IntPushTwo( &p->vArray2, Bac_BoxFanin(p, iBox, 1+i), Bac_BoxFanin(p, iBox, 1+nBits+i) );
+            iObj = Bac_BoxCreate( p, BAC_BOX_ADD, &p->vArray2, 1, 1, 1 );
+            Carry = Bac_BoxBo(p, iObj, 1);
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, 0) );
         }
         Vec_IntPush( &p->vArray, Carry );
     }
-    else if ( Type == CBA_BOX_SUB )
+    else if ( Type == BAC_BOX_SUB )
     {
         int iConst, nBits = Vec_IntEntry(&p->vArray, 0);
         assert( Vec_IntSize(&p->vArray) == 2 );
@@ -241,78 +241,78 @@ int Cba_ObjClpArith( Cba_Ntk_t * p, int iBox )
         // create inverter
         Vec_IntClear( &p->vArray2 );
         for ( i = 0; i < nBits; i++ )
-            Vec_IntPush( &p->vArray2, Cba_BoxFanin(p, iBox, nBits+i) );
-        iObj = Cba_BoxCreate( p, CBA_BOX_INV, &p->vArray2, nBits, -1, nBits );
+            Vec_IntPush( &p->vArray2, Bac_BoxFanin(p, iBox, nBits+i) );
+        iObj = Bac_BoxCreate( p, BAC_BOX_INV, &p->vArray2, nBits, -1, nBits );
         // create constant
         Vec_IntClear( &p->vArray2 );
-        iConst = Cba_BoxCreate( p, CBA_BOX_CT, &p->vArray2, -1, -1, 1 );
+        iConst = Bac_BoxCreate( p, BAC_BOX_CT, &p->vArray2, -1, -1, 1 );
         // collect fanins
         Vec_IntFill( &p->vArray2, 1, iConst+1 );
         for ( i = 0; i < nBits; i++ )
-            Vec_IntPush( &p->vArray2, Cba_BoxFanin(p, iBox, i) );
+            Vec_IntPush( &p->vArray2, Bac_BoxFanin(p, iBox, i) );
         for ( i = 0; i < nBits; i++ )
-            Vec_IntPush( &p->vArray2, Cba_BoxBo(p, iObj, i) );
+            Vec_IntPush( &p->vArray2, Bac_BoxBo(p, iObj, i) );
         // create adder
-        iObj = Cba_BoxCreate( p, CBA_BOX_ADD, &p->vArray2, nBits, nBits, nBits );
+        iObj = Bac_BoxCreate( p, BAC_BOX_ADD, &p->vArray2, nBits, nBits, nBits );
         // collect fanins
         Vec_IntClear( &p->vArray );
         for ( i = 0; i < nBits; i++ )
-            Vec_IntPush( &p->vArray, Cba_BoxBo(p, iObj, i) );
+            Vec_IntPush( &p->vArray, Bac_BoxBo(p, iObj, i) );
     }
-    else if ( Type == CBA_BOX_MUL )
+    else if ( Type == BAC_BOX_MUL )
     {
     }
-    else if ( Type == CBA_BOX_DIV )
+    else if ( Type == BAC_BOX_DIV )
     {
     }
-    else if ( Type == CBA_BOX_MOD )
+    else if ( Type == BAC_BOX_MOD )
     {
     }
-    else if ( Type == CBA_BOX_REM )
+    else if ( Type == BAC_BOX_REM )
     {
     }
-    else if ( Type == CBA_BOX_POW )
+    else if ( Type == BAC_BOX_POW )
     {
     }
-    else if ( Type == CBA_BOX_MIN )
+    else if ( Type == BAC_BOX_MIN )
     {
     }
-    else if ( Type == CBA_BOX_ABS )
+    else if ( Type == BAC_BOX_ABS )
     {
     }
 
-    else if ( Type == CBA_BOX_LTHAN )
+    else if ( Type == BAC_BOX_LTHAN )
     {
     }
-    else if ( Type == CBA_BOX_LETHAN )
+    else if ( Type == BAC_BOX_LETHAN )
     {
     }
-    else if ( Type == CBA_BOX_METHAN )
+    else if ( Type == BAC_BOX_METHAN )
     {
     }
-    else if ( Type == CBA_BOX_MTHAN )
+    else if ( Type == BAC_BOX_MTHAN )
     {
     }
-    else if ( Type == CBA_BOX_EQU )
+    else if ( Type == BAC_BOX_EQU )
     {
     }
-    else if ( Type == CBA_BOX_NEQU )
+    else if ( Type == BAC_BOX_NEQU )
     {
     }
 
-    else if ( Type == CBA_BOX_SHIL )
+    else if ( Type == BAC_BOX_SHIL )
     {
     }
-    else if ( Type == CBA_BOX_SHIR )
+    else if ( Type == BAC_BOX_SHIR )
     {
     }
-    else if ( Type == CBA_BOX_ROTL )
+    else if ( Type == BAC_BOX_ROTL )
     {
     }
-    else if ( Type == CBA_BOX_ROTR )
+    else if ( Type == BAC_BOX_ROTR )
     {
     }
-    Cba_BoxReplace( p, iBox, Vec_IntArray(&p->vArray), Vec_IntSize(&p->vArray) );
+    Bac_BoxReplace( p, iBox, Vec_IntArray(&p->vArray), Vec_IntSize(&p->vArray) );
     return 1;
 }
 
@@ -327,31 +327,31 @@ int Cba_ObjClpArith( Cba_Ntk_t * p, int iBox )
   SeeAlso     []
 
 ***********************************************************************/
-int Cba_ObjClpMemory( Cba_Ntk_t * p, int iBox )
+int Bac_ObjClpMemory( Bac_Ntk_t * p, int iBox )
 {
-    int i, En, iNext, nItems = Cba_BoxBiNum(p, iBox);
-    assert( Cba_ObjType(p, iBox) == CBA_BOX_RAMBOX );
-    assert( Cba_BoxBiNum(p, iBox) == Cba_BoxBoNum(p, iBox) );
+    int i, En, iNext, nItems = Bac_BoxBiNum(p, iBox);
+    assert( Bac_ObjType(p, iBox) == BAC_BOX_RAMBOX );
+    assert( Bac_BoxBiNum(p, iBox) == Bac_BoxBoNum(p, iBox) );
     // for each fanin of RAMBOX, make sure address width is the same
-    Cba_BoxForEachFaninBox( p, iBox, iNext, i )
-        assert( Cba_ObjType(p, iNext) == CBA_BOX_RAMWC );
+    Bac_BoxForEachFaninBox( p, iBox, iNext, i )
+        assert( Bac_ObjType(p, iNext) == BAC_BOX_RAMWC );
 
     // create decoders, selectors and flops
     for ( i = 0; i < nItems; i++ )
     {
-        int BoxW = Cba_ObjFanin(p, Cba_BoxBi(p, iBox, i));
-        int BoxR = Cba_ObjFanout(p, Cba_BoxBo(p, iBox, 0));
-        assert( Cba_ObjType(p, BoxW) == CBA_BOX_RAMWC );
-        assert( Cba_ObjType(p, BoxR) == CBA_BOX_RAMR );
+        int BoxW = Bac_ObjFanin(p, Bac_BoxBi(p, iBox, i));
+        int BoxR = Bac_ObjFanout(p, Bac_BoxBo(p, iBox, 0));
+        assert( Bac_ObjType(p, BoxW) == BAC_BOX_RAMWC );
+        assert( Bac_ObjType(p, BoxR) == BAC_BOX_RAMR );
         // create enable
-        Vec_IntFillTwo( &p->vArray2, 2, Cba_BoxFanin(p, BoxW, 1), Cba_BoxFanin(p, BoxR, 0) );
-        En = Cba_BoxCreate( p, CBA_BOX_AND, &p->vArray2, 1, 1, 1 );
-        En = Cba_BoxBo( p, En, 0 );
+        Vec_IntFillTwo( &p->vArray2, 2, Bac_BoxFanin(p, BoxW, 1), Bac_BoxFanin(p, BoxR, 0) );
+        En = Bac_BoxCreate( p, BAC_BOX_AND, &p->vArray2, 1, 1, 1 );
+        En = Bac_BoxBo( p, En, 0 );
         // collect address
     }
     // for each fanout of RAMBOX, makes ure address width is the same
-//    Cba_BoxForEachFanoutBox( p, iBox, iNext, i )
-//        assert( Cba_ObjType(p, iNext) == CBA_BOX_RAMR );
+//    Bac_BoxForEachFanoutBox( p, iBox, iNext, i )
+//        assert( Bac_ObjType(p, iNext) == BAC_BOX_RAMR );
     // create selectors and connect them
     return 1;
 }
diff --git a/src/base/bac/bacPrs.h b/src/base/bac/bacPrs.h
new file mode 100644
index 00000000..d45bceec
--- /dev/null
+++ b/src/base/bac/bacPrs.h
@@ -0,0 +1,363 @@
+/**CFile****************************************************************
+
+  FileName    [bacPrs.h]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Parser declarations.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacPrs.h,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#ifndef ABC__base__prs__prs_h
+#define ABC__base__prs__prs_h
+
+
+////////////////////////////////////////////////////////////////////////
+///                          INCLUDES                                ///
+////////////////////////////////////////////////////////////////////////
+
+#include "aig/gia/gia.h"
+#include "misc/util/utilNam.h"
+
+////////////////////////////////////////////////////////////////////////
+///                         PARAMETERS                               ///
+////////////////////////////////////////////////////////////////////////
+
+ABC_NAMESPACE_HEADER_START 
+
+// parser name types
+typedef enum { 
+    BAC_PRS_NAME = 0,        // 0:  name/variable
+    BAC_PRS_SLICE,           // 1:  slice
+    BAC_PRS_CONST,           // 2:  constant
+    BAC_PRS_CONCAT,          // 3:  concatentation
+} Psr_ManType_t; 
+
+////////////////////////////////////////////////////////////////////////
+///                         BASIC TYPES                              ///
+////////////////////////////////////////////////////////////////////////
+
+// network
+typedef struct Psr_Ntk_t_ Psr_Ntk_t;
+struct Psr_Ntk_t_
+{
+    // general info
+    int          iModuleName;
+    unsigned     fMapped : 1;
+    unsigned     fSlices : 1;
+    unsigned     fHasC0s : 1;
+    unsigned     fHasC1s : 1;
+    unsigned     fHasCXs : 1;
+    unsigned     fHasCZs : 1;
+    Abc_Nam_t *  pStrs;
+    // interface
+    Vec_Int_t    vOrder;     // order of signals
+    // signal names
+    Vec_Int_t    vInouts;    // inouts 
+    Vec_Int_t    vInputs;    // inputs 
+    Vec_Int_t    vOutputs;   // outputs
+    Vec_Int_t    vWires;     // wires  
+    // signal ranges
+    Vec_Int_t    vInoutsR;   // inouts 
+    Vec_Int_t    vInputsR;   // inputs 
+    Vec_Int_t    vOutputsR;  // outputs
+    Vec_Int_t    vWiresR;    // wires  
+    // slices/concatenations/objects
+    Vec_Int_t    vSlices;    // NameId + RangeId
+    Vec_Int_t    vConcats;   // array of NameId/SliceId/ConstId
+    Vec_Int_t    vBoxes;     // ModuleId + InstId + array of pairs {FormNameId, ActSignalId(NameId/SliceId/ConstId/ConcatId)}
+    Vec_Int_t    vObjs;      // box handles
+};
+
+// parser
+typedef struct Psr_Man_t_ Psr_Man_t;
+struct Psr_Man_t_
+{
+    // input data
+    char *       pName;       // file name
+    char *       pBuffer;     // file contents
+    char *       pLimit;      // end of file
+    char *       pCur;        // current position
+    Abc_Nam_t *  pStrs;       // string manager
+    Psr_Ntk_t *  pNtk;        // current network
+    Vec_Ptr_t *  vNtks;       // input networks
+    // temporary data
+    Vec_Str_t    vCover;      // one SOP cover
+    Vec_Int_t    vTemp;       // array of tokens
+    Vec_Int_t    vTemp2;      // array of tokens
+    // statistics
+    Vec_Int_t    vKnown;
+    Vec_Int_t    vFailed;
+    Vec_Int_t    vSucceeded;
+    // error handling
+    int          fUsingTemp2; // vTemp2 is in use
+    char ErrorStr[1000];      // error
+};
+
+static inline Psr_Ntk_t * Psr_ManNtk( Vec_Ptr_t * vPrs, int i )        { return i >= 0 && i < Vec_PtrSize(vPrs) ? (Psr_Ntk_t *)Vec_PtrEntry(vPrs, i) : NULL; }
+static inline Psr_Ntk_t * Psr_ManRoot( Vec_Ptr_t * vPrs )              { return Psr_ManNtk(vPrs, 0);                             }
+static inline Abc_Nam_t * Psr_ManNameMan( Vec_Ptr_t * vPrs )           { return Psr_ManRoot(vPrs)->pStrs;                        }
+
+static inline int         Psr_NtkId( Psr_Ntk_t * p )                   { return p->iModuleName;                                  }
+static inline int         Psr_NtkPioNum( Psr_Ntk_t * p )               { return Vec_IntSize(&p->vInouts);                        }
+static inline int         Psr_NtkPiNum( Psr_Ntk_t * p )                { return Vec_IntSize(&p->vInputs);                        }
+static inline int         Psr_NtkPoNum( Psr_Ntk_t * p )                { return Vec_IntSize(&p->vOutputs);                       }
+static inline int         Psr_NtkBoxNum( Psr_Ntk_t * p )               { return Vec_IntSize(&p->vObjs);                          }
+static inline int         Psr_NtkObjNum( Psr_Ntk_t * p )               { return Psr_NtkPioNum(p) + Psr_NtkPiNum(p) + Psr_NtkPoNum(p) + Psr_NtkBoxNum(p); }
+static inline char *      Psr_NtkStr( Psr_Ntk_t * p, int h )           { return Abc_NamStr(p->pStrs, h);                         }
+static inline char *      Psr_NtkName( Psr_Ntk_t * p )                 { return Psr_NtkStr(p, Psr_NtkId(p));                     }
+static inline int         Psr_NtkSigName( Psr_Ntk_t * p, int i )       { if (!p->fSlices) return i; assert(Abc_Lit2Att2(i) == BAC_PRS_NAME); return Abc_Lit2Var2(i); }
+
+static inline int         Psr_SliceName( Psr_Ntk_t * p, int h )        { return Vec_IntEntry(&p->vSlices, h);                    }
+static inline int         Psr_SliceRange( Psr_Ntk_t * p, int h )       { return Vec_IntEntry(&p->vSlices, h+1);                  }
+
+static inline int         Psr_CatSize( Psr_Ntk_t * p, int h )          { return Vec_IntEntry(&p->vConcats, h);                   }
+static inline int *       Psr_CatArray( Psr_Ntk_t * p, int h )         { return Vec_IntEntryP(&p->vConcats, h+1);                }
+static inline Vec_Int_t * Psr_CatSignals( Psr_Ntk_t * p, int h )       { static Vec_Int_t V; V.nSize = V.nCap = Psr_CatSize(p, h); V.pArray = Psr_CatArray(p, h); return &V; }
+
+static inline int         Psr_BoxHand( Psr_Ntk_t * p, int i )          { return Vec_IntEntry(&p->vObjs, i);                      }
+static inline int         Psr_BoxSize( Psr_Ntk_t * p, int i )          { return Vec_IntEntry(&p->vBoxes, Psr_BoxHand(p, i))-2;   }
+static inline int         Psr_BoxIONum( Psr_Ntk_t * p, int i )         { return Psr_BoxSize(p, i) / 2;                           }
+static inline int         Psr_BoxNtk( Psr_Ntk_t * p, int i )           { return Vec_IntEntry(&p->vBoxes, Psr_BoxHand(p, i)+1);   }
+static inline void        Psr_BoxSetNtk( Psr_Ntk_t * p, int i, int m ) { Vec_IntWriteEntry(&p->vBoxes, Psr_BoxHand(p, i)+1, m);  }
+static inline int         Psr_BoxName( Psr_Ntk_t * p, int i )          { return Vec_IntEntry(&p->vBoxes, Psr_BoxHand(p, i)+2);   }
+static inline int         Psr_BoxIsNode( Psr_Ntk_t * p, int i )        { return!Vec_IntEntry(&p->vBoxes, Psr_BoxHand(p, i)+3);   } // no formal names
+static inline int *       Psr_BoxArray( Psr_Ntk_t * p, int i )         { return Vec_IntEntryP(&p->vBoxes, Psr_BoxHand(p, i)+3);  }
+static inline Vec_Int_t * Psr_BoxSignals( Psr_Ntk_t * p, int i )       { static Vec_Int_t V; V.nSize = V.nCap = Psr_BoxSize(p, i); V.pArray = Psr_BoxArray(p, i); return &V; }
+
+#define Psr_ManForEachNameVec( vVec, p, pName, i )   \
+    for ( i = 0; (i < Vec_IntSize(vVec)) && ((pName) = Abc_NamStr(p->pStrs, Vec_IntEntry(vVec,i))); i++ )
+
+#define Psr_NtkForEachPio( p, NameId, i )            \
+    for ( i = 0; i < Psr_NtkPioNum(p) && ((NameId) = Vec_IntEntry(&p->vInouts, i)); i++ )
+#define Psr_NtkForEachPi( p, NameId, i )             \
+    for ( i = 0; i < Psr_NtkPiNum(p) && ((NameId) = Vec_IntEntry(&p->vInputs, i)); i++ )
+#define Psr_NtkForEachPo( p, NameId, i )             \
+    for ( i = 0; i < Psr_NtkPoNum(p) && ((NameId) = Vec_IntEntry(&p->vOutputs, i)); i++ )
+#define Psr_NtkForEachBox( p, vVec, i )              \
+    for ( i = 0; i < Psr_NtkBoxNum(p) && ((vVec) = Psr_BoxSignals(p, i)); i++ )
+
+////////////////////////////////////////////////////////////////////////
+///                      MACRO DEFINITIONS                           ///
+////////////////////////////////////////////////////////////////////////
+
+// create error message
+static inline int Psr_ManErrorSet( Psr_Man_t * p, char * pError, int Value )
+{
+    assert( !p->ErrorStr[0] );
+    sprintf( p->ErrorStr, "%s", pError );
+    return Value;
+}
+// clear error message
+static inline void Psr_ManErrorClear( Psr_Man_t * p )
+{
+    p->ErrorStr[0] = '\0';
+}
+// print error message
+static inline int Psr_ManErrorPrint( Psr_Man_t * p )
+{
+    char * pThis; int iLine = 0;
+    if ( !p->ErrorStr[0] ) return 1;
+    for ( pThis = p->pBuffer; pThis < p->pCur; pThis++ )
+        iLine += (int)(*pThis == '\n');
+    printf( "Line %d: %s\n", iLine, p->ErrorStr );
+    return 0;
+}
+
+// parsing network
+static inline void Psr_ManInitializeNtk( Psr_Man_t * p, int iName, int fSlices )
+{
+    assert( p->pNtk == NULL );
+    p->pNtk = ABC_CALLOC( Psr_Ntk_t, 1 );
+    p->pNtk->iModuleName = iName;
+    p->pNtk->fSlices = fSlices;
+    p->pNtk->pStrs = Abc_NamRef( p->pStrs );
+    Vec_PtrPush( p->vNtks, p->pNtk );
+}
+static inline void Psr_ManFinalizeNtk( Psr_Man_t * p )
+{
+    assert( p->pNtk != NULL );
+    p->pNtk = NULL;
+}
+
+// parsing slice/concatentation/box
+static inline int Psr_NtkAddSlice( Psr_Ntk_t * p, int Name, int Range )
+{
+    int Value = Vec_IntSize(&p->vSlices);
+    Vec_IntPushTwo( &p->vSlices, Name, Range );
+    return Value;
+}
+static inline int Psr_NtkAddConcat( Psr_Ntk_t * p, Vec_Int_t * vTemp )
+{
+    int Value;
+    if ( !(Vec_IntSize(&p->vConcats) & 1) )
+        Vec_IntPush(&p->vConcats, -1);
+    Value = Vec_IntSize(&p->vConcats);
+    assert( Value & 1 );
+    Vec_IntPush( &p->vConcats, Vec_IntSize(vTemp) );
+    Vec_IntAppend( &p->vConcats, vTemp );
+    return Value;
+}
+static inline void Psr_NtkAddBox( Psr_Ntk_t * p, int ModName, int InstName, Vec_Int_t * vTemp )
+{
+    int Value;
+    assert( Vec_IntSize(vTemp) % 2 == 0 );
+    if ( !(Vec_IntSize(&p->vBoxes) & 1) )
+        Vec_IntPush(&p->vBoxes, -1);
+    Value = Vec_IntSize(&p->vBoxes);
+    assert( Value & 1 );
+    Vec_IntPush( &p->vObjs, Value );
+    // create entry
+    Vec_IntPush( &p->vBoxes, Vec_IntSize(vTemp)+2 );
+    Vec_IntPush( &p->vBoxes, ModName );
+    Vec_IntPush( &p->vBoxes, InstName );
+    Vec_IntAppend( &p->vBoxes, vTemp );
+}
+
+
+static inline char * Psr_ManLoadFile( char * pFileName, char ** ppLimit )
+{
+    char * pBuffer;
+    int nFileSize, RetValue;
+    FILE * pFile = fopen( pFileName, "rb" );
+    if ( pFile == NULL )
+    {
+        printf( "Cannot open input file.\n" );
+        return NULL;
+    }
+    // get the file size, in bytes
+    fseek( pFile, 0, SEEK_END );  
+    nFileSize = ftell( pFile );  
+    // move the file current reading position to the beginning
+    rewind( pFile ); 
+    // load the contents of the file into memory
+    pBuffer = ABC_ALLOC( char, nFileSize + 16 );
+    pBuffer[0] = '\n';
+    RetValue = fread( pBuffer+1, nFileSize, 1, pFile );
+    fclose( pFile );
+    // terminate the string with '\0'
+    pBuffer[nFileSize + 1] = '\n';
+    pBuffer[nFileSize + 2] = '\0';
+    *ppLimit = pBuffer + nFileSize + 3;
+    return pBuffer;
+}
+static inline Psr_Man_t * Psr_ManAlloc( char * pFileName )
+{
+    Psr_Man_t * p;
+    char * pBuffer, * pLimit;
+    pBuffer = Psr_ManLoadFile( pFileName, &pLimit );
+    if ( pBuffer == NULL )
+        return NULL;
+    p = ABC_CALLOC( Psr_Man_t, 1 );
+    p->pName   = pFileName;
+    p->pBuffer = pBuffer;
+    p->pLimit  = pLimit;
+    p->pCur    = pBuffer;
+    p->pStrs   = Abc_NamStart( 1000, 24 );
+    p->vNtks   = Vec_PtrAlloc( 100 );
+    return p;
+}
+
+static inline void Psr_NtkFree( Psr_Ntk_t * p )
+{
+    if ( p->pStrs )
+        Abc_NamDeref( p->pStrs );
+    Vec_IntErase( &p->vOrder );
+    Vec_IntErase( &p->vInouts );
+    Vec_IntErase( &p->vInputs );
+    Vec_IntErase( &p->vOutputs );
+    Vec_IntErase( &p->vWires );
+    Vec_IntErase( &p->vInoutsR );
+    Vec_IntErase( &p->vInputsR );
+    Vec_IntErase( &p->vOutputsR );
+    Vec_IntErase( &p->vWiresR );
+    Vec_IntErase( &p->vSlices );
+    Vec_IntErase( &p->vConcats );
+    Vec_IntErase( &p->vBoxes );
+    Vec_IntErase( &p->vObjs );
+    ABC_FREE( p );
+}
+
+static inline void Psr_ManVecFree( Vec_Ptr_t * vPrs )
+{
+    Psr_Ntk_t * pNtk; int i;
+    Vec_PtrForEachEntry( Psr_Ntk_t *, vPrs, pNtk, i )
+        Psr_NtkFree( pNtk );
+    Vec_PtrFree( vPrs );
+}
+
+static inline void Psr_ManFree( Psr_Man_t * p )
+{
+    if ( p->pStrs )
+        Abc_NamDeref( p->pStrs );
+    if ( p->vNtks )
+        Psr_ManVecFree( p->vNtks );
+    // temporary
+    Vec_StrErase( &p->vCover );
+    Vec_IntErase( &p->vTemp );
+    Vec_IntErase( &p->vTemp2 );
+    Vec_IntErase( &p->vKnown );
+    Vec_IntErase( &p->vFailed );
+    Vec_IntErase( &p->vSucceeded );
+    ABC_FREE( p->pBuffer );
+    ABC_FREE( p );
+}
+
+static inline int Psr_NtkMemory( Psr_Ntk_t * p )
+{
+    int nMem = sizeof(Psr_Ntk_t);
+    nMem += Vec_IntMemory( &p->vOrder );
+    nMem += Vec_IntMemory( &p->vInouts );
+    nMem += Vec_IntMemory( &p->vInputs );
+    nMem += Vec_IntMemory( &p->vOutputs );
+    nMem += Vec_IntMemory( &p->vWires );
+    nMem += Vec_IntMemory( &p->vInoutsR );
+    nMem += Vec_IntMemory( &p->vInputsR );
+    nMem += Vec_IntMemory( &p->vOutputsR );
+    nMem += Vec_IntMemory( &p->vWiresR );
+    nMem += Vec_IntMemory( &p->vSlices );
+    nMem += Vec_IntMemory( &p->vBoxes );
+    nMem += Vec_IntMemory( &p->vConcats );
+    return nMem;
+}
+static inline int Psr_ManMemory( Vec_Ptr_t * vPrs )
+{
+    Psr_Ntk_t * pNtk; int i;
+    int nMem = Vec_PtrMemory(vPrs);
+    Vec_PtrForEachEntry( Psr_Ntk_t *, vPrs, pNtk, i )
+        nMem += Psr_NtkMemory( pNtk );
+    nMem += Abc_NamMemUsed(Psr_ManNameMan(vPrs));
+    return nMem;
+}
+
+
+
+////////////////////////////////////////////////////////////////////////
+///                             ITERATORS                            ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                    FUNCTION DECLARATIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/*=== bac.c ========================================================*/
+
+
+ABC_NAMESPACE_HEADER_END
+
+#endif
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
diff --git a/src/base/cba/cbaPrsBuild.c b/src/base/bac/bacPrsBuild.c
index a74088fa..e5c9c354 100644
--- a/src/base/cba/cbaPrsBuild.c
+++ b/src/base/bac/bacPrsBuild.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaPrsBuild.c]
+  FileName    [bacPrsBuild.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,12 +14,12 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaPrsBuild.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacPrsBuild.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
-#include "cbaPrs.h"
+#include "bac.h"
+#include "bacPrs.h"
 #include "map/mio/mio.h"
 #include "base/main/main.h"
 
@@ -44,17 +44,17 @@ ABC_NAMESPACE_IMPL_START
   SeeAlso     []
 
 ***********************************************************************/
-int Prs_ManIsMapped( Prs_Ntk_t * pNtk )
+int Psr_ManIsMapped( Psr_Ntk_t * pNtk )
 {
     Vec_Int_t * vSigs; int iBox;
     Mio_Library_t * pLib = (Mio_Library_t *)Abc_FrameReadLibGen();
     if ( pLib == NULL )
         return 0;
-    Prs_NtkForEachBox( pNtk, vSigs, iBox )
-        if ( !Prs_BoxIsNode(pNtk, iBox) )
+    Psr_NtkForEachBox( pNtk, vSigs, iBox )
+        if ( !Psr_BoxIsNode(pNtk, iBox) )
         {
-            int NtkId = Prs_BoxNtk( pNtk, iBox );
-            if ( Mio_LibraryReadGateByName(pLib, Prs_NtkStr(pNtk, NtkId), NULL) )
+            int NtkId = Psr_BoxNtk( pNtk, iBox );
+            if ( Mio_LibraryReadGateByName(pLib, Psr_NtkStr(pNtk, NtkId), NULL) )
                 return 1;
         }
     return 0;
@@ -71,31 +71,12 @@ int Prs_ManIsMapped( Prs_Ntk_t * pNtk )
   SeeAlso     []
 
 ***********************************************************************/
-void Prs_ManVecFree( Vec_Ptr_t * vPrs )
-{
-    Prs_Ntk_t * pNtk; int i;
-    Vec_PtrForEachEntry( Prs_Ntk_t *, vPrs, pNtk, i )
-        Prs_NtkFree( pNtk );
-    Vec_PtrFree( vPrs );
-}
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Prs_NtkCountObjects( Prs_Ntk_t * pNtk )
+int Psr_NtkCountObjects( Psr_Ntk_t * pNtk )
 {
     Vec_Int_t * vFanins; 
-    int i, Count = Prs_NtkObjNum(pNtk);
-    Prs_NtkForEachBox( pNtk, vFanins, i )
-        Count += Prs_BoxIONum(pNtk, i);
+    int i, Count = Psr_NtkObjNum(pNtk);
+    Psr_NtkForEachBox( pNtk, vFanins, i )
+        Count += Psr_BoxIONum(pNtk, i);
     return Count;
 }
 
@@ -111,19 +92,19 @@ int Prs_NtkCountObjects( Prs_Ntk_t * pNtk )
 
 ***********************************************************************/
 // replaces NameIds of formal names by their index in the box model
-void Prs_ManRemapOne( Vec_Int_t * vSigs, Prs_Ntk_t * pNtkBox, Vec_Int_t * vMap )
+void Psr_ManRemapOne( Vec_Int_t * vSigs, Psr_Ntk_t * pNtkBox, Vec_Int_t * vMap )
 {
     int i, NameId;
     // map formal names into I/O indexes
-    Prs_NtkForEachPi( pNtkBox, NameId, i )
+    Psr_NtkForEachPi( pNtkBox, NameId, i )
     {
         assert( Vec_IntEntry(vMap, NameId) == -1 );
         Vec_IntWriteEntry( vMap, NameId, i + 1 ); // +1 to keep 1st form input non-zero
     }
-    Prs_NtkForEachPo( pNtkBox, NameId, i )
+    Psr_NtkForEachPo( pNtkBox, NameId, i )
     {
         assert( Vec_IntEntry(vMap, NameId) == -1 );
-        Vec_IntWriteEntry( vMap, NameId, Prs_NtkPiNum(pNtkBox) + i + 1 ); // +1 to keep 1st form input non-zero
+        Vec_IntWriteEntry( vMap, NameId, Psr_NtkPiNum(pNtkBox) + i + 1 ); // +1 to keep 1st form input non-zero
     }
     // remap box
     assert( Vec_IntSize(vSigs) % 2 == 0 );
@@ -133,100 +114,100 @@ void Prs_ManRemapOne( Vec_Int_t * vSigs, Prs_Ntk_t * pNtkBox, Vec_Int_t * vMap )
         Vec_IntWriteEntry( vSigs, i++, Vec_IntEntry(vMap, NameId) );
     }
     // unmap formal inputs
-    Prs_NtkForEachPi( pNtkBox, NameId, i )
+    Psr_NtkForEachPi( pNtkBox, NameId, i )
         Vec_IntWriteEntry( vMap, NameId, -1 );
-    Prs_NtkForEachPo( pNtkBox, NameId, i )
+    Psr_NtkForEachPo( pNtkBox, NameId, i )
         Vec_IntWriteEntry( vMap, NameId, -1 );
 }
-void Prs_ManRemapGate( Vec_Int_t * vSigs )
+void Psr_ManRemapGate( Vec_Int_t * vSigs )
 {
     int i, FormId;
     Vec_IntForEachEntry( vSigs, FormId, i )
         Vec_IntWriteEntry( vSigs, i, i/2 + 1 ), i++;
 }
-void Prs_ManRemapBoxes( Cba_Man_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_Int_t * vMap )
+void Psr_ManRemapBoxes( Bac_Man_t * pNew, Vec_Ptr_t * vDes, Psr_Ntk_t * pNtk, Vec_Int_t * vMap )
 {
     Vec_Int_t * vSigs; int iBox;
-    Prs_NtkForEachBox( pNtk, vSigs, iBox )
-        if ( !Prs_BoxIsNode(pNtk, iBox) )
+    Psr_NtkForEachBox( pNtk, vSigs, iBox )
+        if ( !Psr_BoxIsNode(pNtk, iBox) )
         {
-            int NtkId = Prs_BoxNtk( pNtk, iBox );
-            int NtkIdNew = Cba_ManNtkFindId( pNew, Prs_NtkStr(pNtk, NtkId) );
+            int NtkId = Psr_BoxNtk( pNtk, iBox );
+            int NtkIdNew = Bac_ManNtkFindId( pNew, Psr_NtkStr(pNtk, NtkId) );
             assert( NtkIdNew > 0 );
-            Prs_BoxSetNtk( pNtk, iBox, NtkIdNew );
-            if ( NtkIdNew <= Cba_ManNtkNum(pNew) )
-                Prs_ManRemapOne( vSigs, Prs_ManNtk(vDes, NtkIdNew-1), vMap );
+            Psr_BoxSetNtk( pNtk, iBox, NtkIdNew );
+            if ( NtkIdNew <= Bac_ManNtkNum(pNew) )
+                Psr_ManRemapOne( vSigs, Psr_ManNtk(vDes, NtkIdNew-1), vMap );
             //else
-            //    Prs_ManRemapGate( vSigs );
+            //    Psr_ManRemapGate( vSigs );
         }
 }
-void Prs_ManCleanMap( Prs_Ntk_t * pNtk, Vec_Int_t * vMap )
+void Psr_ManCleanMap( Psr_Ntk_t * pNtk, Vec_Int_t * vMap )
 {
     Vec_Int_t * vSigs; 
     int i, k, NameId, Sig;
-    Prs_NtkForEachPi( pNtk, NameId, i )
+    Psr_NtkForEachPi( pNtk, NameId, i )
         Vec_IntWriteEntry( vMap, NameId, -1 );
-    Prs_NtkForEachBox( pNtk, vSigs, i )
+    Psr_NtkForEachBox( pNtk, vSigs, i )
         Vec_IntForEachEntryDouble( vSigs, NameId, Sig, k )
-            Vec_IntWriteEntry( vMap, Prs_NtkSigName(pNtk, Sig), -1 );
-    Prs_NtkForEachPo( pNtk, NameId, i )
+            Vec_IntWriteEntry( vMap, Psr_NtkSigName(pNtk, Sig), -1 );
+    Psr_NtkForEachPo( pNtk, NameId, i )
         Vec_IntWriteEntry( vMap, NameId, -1 );
 }
 // create maps of NameId and boxes
-void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_Int_t * vMap, Vec_Int_t * vBoxes )
+void Psr_ManBuildNtk( Bac_Ntk_t * pNew, Vec_Ptr_t * vDes, Psr_Ntk_t * pNtk, Vec_Int_t * vMap, Vec_Int_t * vBoxes )
 {
-    Prs_Ntk_t * pNtkBox; Vec_Int_t * vSigs; int iBox;
+    Psr_Ntk_t * pNtkBox; Vec_Int_t * vSigs; int iBox;
     int i, Index, NameId, iObj, iConst0, iTerm;
     int iNonDriven = -1, nNonDriven = 0;
-    assert( Prs_NtkPioNum(pNtk) == 0 );
-    Prs_ManRemapBoxes( pNew->pDesign, vDes, pNtk, vMap );
-    Cba_NtkStartNames( pNew );
+    assert( Psr_NtkPioNum(pNtk) == 0 );
+    Psr_ManRemapBoxes( pNew->pDesign, vDes, pNtk, vMap );
+    Bac_NtkStartNames( pNew );
     // create primary inputs 
-    Prs_NtkForEachPi( pNtk, NameId, i )
+    Psr_NtkForEachPi( pNtk, NameId, i )
     {
         if ( Vec_IntEntry(vMap, NameId) != -1 )
             printf( "Primary inputs %d and %d have the same name.\n", Vec_IntEntry(vMap, NameId), i );
-        iObj = Cba_ObjAlloc( pNew, CBA_OBJ_PI, -1 );
-        Cba_ObjSetName( pNew, iObj, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+        iObj = Bac_ObjAlloc( pNew, BAC_OBJ_PI, -1 );
+        Bac_ObjSetName( pNew, iObj, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
         Vec_IntWriteEntry( vMap, NameId, iObj );
     }
     // create box outputs
     Vec_IntClear( vBoxes );
-    Prs_NtkForEachBox( pNtk, vSigs, iBox )
-        if ( !Prs_BoxIsNode(pNtk, iBox) )
+    Psr_NtkForEachBox( pNtk, vSigs, iBox )
+        if ( !Psr_BoxIsNode(pNtk, iBox) )
         {
-            pNtkBox = Prs_ManNtk( vDes, Prs_BoxNtk(pNtk, iBox)-1 );
+            pNtkBox = Psr_ManNtk( vDes, Psr_BoxNtk(pNtk, iBox)-1 );
             if ( pNtkBox == NULL )
             {
-                iObj = Cba_BoxAlloc( pNew, CBA_BOX_GATE, Vec_IntSize(vSigs)/2-1, 1, Prs_BoxNtk(pNtk, iBox) );
-                Cba_ObjSetName( pNew, iObj, Abc_Var2Lit2(Prs_BoxName(pNtk, iBox), CBA_NAME_BIN) );
+                iObj = Bac_BoxAlloc( pNew, BAC_BOX_GATE, Vec_IntSize(vSigs)/2-1, 1, Psr_BoxNtk(pNtk, iBox) );
+                Bac_ObjSetName( pNew, iObj, Abc_Var2Lit2(Psr_BoxName(pNtk, iBox), BAC_NAME_BIN) );
                 // consider box output 
                 NameId = Vec_IntEntryLast( vSigs );
-                NameId = Prs_NtkSigName( pNtk, NameId );
+                NameId = Psr_NtkSigName( pNtk, NameId );
                 if ( Vec_IntEntry(vMap, NameId) != -1 )
                     printf( "Box output name %d is already driven.\n", NameId );
-                iTerm = Cba_BoxBo( pNew, iObj, 0 );
-                Cba_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+                iTerm = Bac_BoxBo( pNew, iObj, 0 );
+                Bac_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
                 Vec_IntWriteEntry( vMap, NameId, iTerm );
             }
             else
             {
-                iObj = Cba_BoxAlloc( pNew, CBA_OBJ_BOX, Prs_NtkPiNum(pNtkBox), Prs_NtkPoNum(pNtkBox), Prs_BoxNtk(pNtk, iBox) );
-                Cba_ObjSetName( pNew, iObj, Abc_Var2Lit2(Prs_BoxName(pNtk, iBox), CBA_NAME_BIN) );
-                Cba_NtkSetHost( Cba_ManNtk(pNew->pDesign, Prs_BoxNtk(pNtk, iBox)), Cba_NtkId(pNew), iObj );
+                iObj = Bac_BoxAlloc( pNew, BAC_OBJ_BOX, Psr_NtkPiNum(pNtkBox), Psr_NtkPoNum(pNtkBox), Psr_BoxNtk(pNtk, iBox) );
+                Bac_ObjSetName( pNew, iObj, Abc_Var2Lit2(Psr_BoxName(pNtk, iBox), BAC_NAME_BIN) );
+                Bac_NtkSetHost( Bac_ManNtk(pNew->pDesign, Psr_BoxNtk(pNtk, iBox)), Bac_NtkId(pNew), iObj );
                 Vec_IntForEachEntry( vSigs, Index, i )
                 {
                     i++;
-                    if ( --Index < Prs_NtkPiNum(pNtkBox) )
+                    if ( --Index < Psr_NtkPiNum(pNtkBox) )
                         continue;
-                    assert( Index - Prs_NtkPiNum(pNtkBox) < Prs_NtkPoNum(pNtkBox) );
+                    assert( Index - Psr_NtkPiNum(pNtkBox) < Psr_NtkPoNum(pNtkBox) );
                     // consider box output 
                     NameId = Vec_IntEntry( vSigs, i );
-                    NameId = Prs_NtkSigName( pNtk, NameId );
+                    NameId = Psr_NtkSigName( pNtk, NameId );
                     if ( Vec_IntEntry(vMap, NameId) != -1 )
                         printf( "Box output name %d is already driven.\n", NameId );
-                    iTerm = Cba_BoxBo( pNew, iObj, Index - Prs_NtkPiNum(pNtkBox) );
-                    Cba_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+                    iTerm = Bac_BoxBo( pNew, iObj, Index - Psr_NtkPiNum(pNtkBox) );
+                    Bac_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
                     Vec_IntWriteEntry( vMap, NameId, iTerm );
                 }
             }
@@ -235,23 +216,23 @@ void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_
         }
         else
         {
-            iObj = Cba_BoxAlloc( pNew, (Cba_ObjType_t)Prs_BoxNtk(pNtk, iBox), Prs_BoxIONum(pNtk, iBox)-1, 1, -1 );
+            iObj = Bac_BoxAlloc( pNew, (Bac_ObjType_t)Psr_BoxNtk(pNtk, iBox), Psr_BoxIONum(pNtk, iBox)-1, 1, -1 );
             // consider box output 
             NameId = Vec_IntEntryLast( vSigs );
-            NameId = Prs_NtkSigName( pNtk, NameId );
+            NameId = Psr_NtkSigName( pNtk, NameId );
             if ( Vec_IntEntry(vMap, NameId) != -1 )
                 printf( "Node output name %d is already driven.\n", NameId );
-            iTerm = Cba_BoxBo( pNew, iObj, 0 );
-            Cba_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+            iTerm = Bac_BoxBo( pNew, iObj, 0 );
+            Bac_ObjSetName( pNew, iTerm, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
             Vec_IntWriteEntry( vMap, NameId, iTerm );
             // remember box
             Vec_IntPush( vBoxes, iObj );
         }
     // add fanins for box inputs
-    Prs_NtkForEachBox( pNtk, vSigs, iBox )
-        if ( !Prs_BoxIsNode(pNtk, iBox) )
+    Psr_NtkForEachBox( pNtk, vSigs, iBox )
+        if ( !Psr_BoxIsNode(pNtk, iBox) )
         {
-            pNtkBox = Prs_ManNtk( vDes, Prs_BoxNtk(pNtk, iBox)-1 );
+            pNtkBox = Psr_ManNtk( vDes, Psr_BoxNtk(pNtk, iBox)-1 );
             iObj = Vec_IntEntry( vBoxes, iBox );
             if ( pNtkBox == NULL )
             {
@@ -259,17 +240,17 @@ void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_
                 {
                     i++;
                     NameId = Vec_IntEntry( vSigs, i );
-                    NameId = Prs_NtkSigName( pNtk, NameId );
-                    iTerm = Cba_BoxBi( pNew, iObj, i/2 );
+                    NameId = Psr_NtkSigName( pNtk, NameId );
+                    iTerm = Bac_BoxBi( pNew, iObj, i/2 );
                     if ( Vec_IntEntry(vMap, NameId) == -1 )
                     {
-                        iConst0 = Cba_BoxAlloc( pNew, CBA_BOX_CF, 0, 1, -1 );
+                        iConst0 = Bac_BoxAlloc( pNew, BAC_BOX_CF, 0, 1, -1 );
                         Vec_IntWriteEntry( vMap, NameId, iConst0+1 );
                         if ( iNonDriven == -1 )
                             iNonDriven = NameId;
                         nNonDriven++;
                     }
-                    Cba_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
+                    Bac_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
                 }
             }
             else
@@ -277,20 +258,20 @@ void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_
                 Vec_IntForEachEntry( vSigs, Index, i )
                 {
                     i++;
-                    if ( --Index >= Prs_NtkPiNum(pNtkBox) )
+                    if ( --Index >= Psr_NtkPiNum(pNtkBox) )
                         continue;
                     NameId = Vec_IntEntry( vSigs, i );
-                    NameId = Prs_NtkSigName( pNtk, NameId );
-                    iTerm = Cba_BoxBi( pNew, iObj, Index );
+                    NameId = Psr_NtkSigName( pNtk, NameId );
+                    iTerm = Bac_BoxBi( pNew, iObj, Index );
                     if ( Vec_IntEntry(vMap, NameId) == -1 )
                     {
-                        iConst0 = Cba_BoxAlloc( pNew, CBA_BOX_CF, 0, 1, -1 );
+                        iConst0 = Bac_BoxAlloc( pNew, BAC_BOX_CF, 0, 1, -1 );
                         Vec_IntWriteEntry( vMap, NameId, iConst0+1 );
                         if ( iNonDriven == -1 )
                             iNonDriven = NameId;
                         nNonDriven++;
                     }
-                    Cba_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
+                    Bac_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
                 }
             }
         }
@@ -300,37 +281,37 @@ void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_
             Vec_IntForEachEntryStop( vSigs, Index, i, Vec_IntSize(vSigs)-2 )
             {
                 NameId = Vec_IntEntry( vSigs, ++i );
-                NameId = Prs_NtkSigName( pNtk, NameId );
-                iTerm = Cba_BoxBi( pNew, iObj, i/2 );
+                NameId = Psr_NtkSigName( pNtk, NameId );
+                iTerm = Bac_BoxBi( pNew, iObj, i/2 );
                 if ( Vec_IntEntry(vMap, NameId) == -1 )
                 {
-                    iConst0 = Cba_BoxAlloc( pNew, CBA_BOX_CF, 0, 1, -1 );
+                    iConst0 = Bac_BoxAlloc( pNew, BAC_BOX_CF, 0, 1, -1 );
                     Vec_IntWriteEntry( vMap, NameId, iConst0+1 );
                     if ( iNonDriven == -1 )
                         iNonDriven = NameId;
                     nNonDriven++;
                 }
-                Cba_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
+                Bac_ObjSetFanin( pNew, iTerm, Vec_IntEntry(vMap, NameId) );
             }
         }
     // add fanins for primary outputs
-    Prs_NtkForEachPo( pNtk, NameId, i )
+    Psr_NtkForEachPo( pNtk, NameId, i )
         if ( Vec_IntEntry(vMap, NameId) == -1 )
         {
-            iConst0 = Cba_BoxAlloc( pNew, CBA_BOX_CF, 0, 1, -1 );
+            iConst0 = Bac_BoxAlloc( pNew, BAC_BOX_CF, 0, 1, -1 );
             Vec_IntWriteEntry( vMap, NameId, iConst0+1 );
             if ( iNonDriven == -1 )
                 iNonDriven = NameId;
             nNonDriven++;
         }
-    Prs_NtkForEachPo( pNtk, NameId, i )
-        iObj = Cba_ObjAlloc( pNew, CBA_OBJ_PO, Vec_IntEntry(vMap, NameId) );
+    Psr_NtkForEachPo( pNtk, NameId, i )
+        iObj = Bac_ObjAlloc( pNew, BAC_OBJ_PO, Vec_IntEntry(vMap, NameId) );
     if ( nNonDriven )
-        printf( "Module %s has %d non-driven nets (for example, %s).\n", Prs_NtkName(pNtk), nNonDriven, Prs_NtkStr(pNtk, iNonDriven) );
-    Prs_ManCleanMap( pNtk, vMap );
+        printf( "Module %s has %d non-driven nets (for example, %s).\n", Psr_NtkName(pNtk), nNonDriven, Psr_NtkStr(pNtk, iNonDriven) );
+    Psr_ManCleanMap( pNtk, vMap );
     // setup info
     Vec_IntForEachEntry( &pNtk->vOrder, NameId, i )
-        Cba_NtkAddInfo( pNew, NameId, -1, -1 );
+        Bac_NtkAddInfo( pNew, NameId, -1, -1 );
 }
 
 /**Function*************************************************************
@@ -344,25 +325,25 @@ void Prs_ManBuildNtk( Cba_Ntk_t * pNew, Vec_Ptr_t * vDes, Prs_Ntk_t * pNtk, Vec_
   SeeAlso     []
 
 ***********************************************************************/
-Cba_Man_t * Prs_ManBuildCba( char * pFileName, Vec_Ptr_t * vDes )
+Bac_Man_t * Psr_ManBuildCba( char * pFileName, Vec_Ptr_t * vDes )
 {
-    Prs_Ntk_t * pNtk = Prs_ManRoot( vDes );  int i;
-    Cba_Man_t * pNew = Cba_ManAlloc( pFileName, Vec_PtrSize(vDes) );
+    Psr_Ntk_t * pNtk = Psr_ManRoot( vDes );  int i;
+    Bac_Man_t * pNew = Bac_ManAlloc( pFileName, Vec_PtrSize(vDes) );
     Vec_Int_t * vMap = Vec_IntStartFull( Abc_NamObjNumMax(pNtk->pStrs) + 1 );
-    Vec_Int_t * vTmp = Vec_IntAlloc( Prs_NtkBoxNum(pNtk) );
+    Vec_Int_t * vTmp = Vec_IntAlloc( Psr_NtkBoxNum(pNtk) );
     Abc_NamDeref( pNew->pStrs );
     pNew->pStrs = Abc_NamRef( pNtk->pStrs );  
-    Vec_PtrForEachEntry( Prs_Ntk_t *, vDes, pNtk, i )
-        Cba_NtkAlloc( Cba_ManNtk(pNew, i+1), Prs_NtkId(pNtk), Prs_NtkPiNum(pNtk), Prs_NtkPoNum(pNtk), Prs_NtkCountObjects(pNtk) );
-    if ( (pNtk->fMapped || (pNtk->fSlices && Prs_ManIsMapped(pNtk))) && !Cba_NtkBuildLibrary(pNew) )
-        Cba_ManFree(pNew), pNew = NULL;
+    Vec_PtrForEachEntry( Psr_Ntk_t *, vDes, pNtk, i )
+        Bac_NtkAlloc( Bac_ManNtk(pNew, i+1), Psr_NtkId(pNtk), Psr_NtkPiNum(pNtk), Psr_NtkPoNum(pNtk), Psr_NtkCountObjects(pNtk) );
+    if ( (pNtk->fMapped || (pNtk->fSlices && Psr_ManIsMapped(pNtk))) && !Bac_NtkBuildLibrary(pNew) )
+        Bac_ManFree(pNew), pNew = NULL;
     else 
-        Vec_PtrForEachEntry( Prs_Ntk_t *, vDes, pNtk, i )
-            Prs_ManBuildNtk( Cba_ManNtk(pNew, i+1), vDes, pNtk, vMap, vTmp );
+        Vec_PtrForEachEntry( Psr_Ntk_t *, vDes, pNtk, i )
+            Psr_ManBuildNtk( Bac_ManNtk(pNew, i+1), vDes, pNtk, vMap, vTmp );
     assert( Vec_IntCountEntry(vMap, -1) == Vec_IntSize(vMap) );
     Vec_IntFree( vMap );
     Vec_IntFree( vTmp );
-//    Vec_StrPrint( &Cba_ManNtk(pNew, 1)->vType, 1 );
+//    Vec_StrPrint( &Bac_ManNtk(pNew, 1)->vType, 1 );
     return pNew;
 }
 
diff --git a/src/base/bac/bacPrsTrans.c b/src/base/bac/bacPrsTrans.c
new file mode 100644
index 00000000..0aba3371
--- /dev/null
+++ b/src/base/bac/bacPrsTrans.c
@@ -0,0 +1,211 @@
+/**CFile****************************************************************
+
+  FileName    [bacPrsTrans.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Parse tree to netlist transformation.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacPrsTrans.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+typedef struct Bac_Trip_t_ Bac_Trip_t;
+struct Bac_Trip_t_
+{
+    Bac_ObjType_t Type;
+    char *        pName;
+    char *        pCode;
+    char *        pSigs[6];
+};
+/*
+static Bac_Trip_t s_Types[100] =
+{ 
+    { BAC_BOX_CT       , "VERIFIC_PWR",           "1",      {"o"} },
+    { BAC_BOX_CF       , "VERIFIC_GND",           "1",      {"o"} },
+    { BAC_BOX_CX       , "VERIFIC_X",             "1",      {"o"} },
+    { BAC_BOX_CZ       , "VERIFIC_Z",             "1",      {"o"} },
+    { BAC_BOX_INV      , "VERIFIC_INV",           "11",     {"i","o"} },
+    { BAC_BOX_BUF      , "VERIFIC_BUF",           "11",     {"i","o"} },
+    { BAC_BOX_AND      , "VERIFIC_AND",           "111",    {"a0","a1","o"} },
+    { BAC_BOX_NAND     , "VERIFIC_NAND",          "111",    {"a0","a1","o"} },
+    { BAC_BOX_OR       , "VERIFIC_OR",            "111",    {"a0","a1","o"} },
+    { BAC_BOX_NOR      , "VERIFIC_NOR",           "111",    {"a0","a1","o"} },
+    { BAC_BOX_XOR      , "VERIFIC_XOR",           "111",    {"a0","a1","o"} },
+    { BAC_BOX_XNOR     , "VERIFIC_XNOR",          "111",    {"a0","a1","o"} },
+    { BAC_BOX_MUX      , "VERIFIC_MUX",           "1111",   {"c","a1","a0","o"} },                        // changed order
+    { (Bac_ObjType_t)-1, "VERIFIC_PULLUP",        "1",      {"o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_PULLDOWN",      "1",      {"o"} },
+    { BAC_BOX_TRI      , "VERIFIC_TRI",           "111",    {"i","c","o"} },
+    { BAC_BOX_LATCH    , "VERIFIC_DLATCH",        "11111",  {"d","async_val","async_cond","gate","q"} },  // changed order
+    { BAC_BOX_LATCHRS  , "VERIFIC_DLATCHRS",      "11111",  {"d","s","r","gate","q"} },                   // changed order
+    { BAC_BOX_DFF      , "VERIFIC_DFF",           "11111",  {"d","async_val","async_cond","clk","q"} },   // changed order
+    { BAC_BOX_DFFRS    , "VERIFIC_DFFRS",         "11111",  {"d","s","r","clk","q"} },                    // changed order
+    { (Bac_ObjType_t)-1, "VERIFIC_NMOS",          "111",    {"c","d","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_PMOS",          "111",    {"c","d","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_CMOS",          "1111",   {"d","nc","pc","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_TRAN",          "111",    {"inout1","inout2","control"} },
+    { BAC_BOX_ADD      , "VERIFIC_FADD",          "11111",  {"cin","a","b","o","cout"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_RCMOS",         "1111",   {"d","nc","pc","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_RNMOS",         "111",    {"c","d","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_RPMOS",         "111",    {"c","d","o"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_RTRAN",         "111",    {"inout1","inout2","control"} },
+    { (Bac_ObjType_t)-1, "VERIFIC_HDL_ASSERTION", "1",      {"condition"} },
+    { BAC_BOX_ADD      , "add_",                  "1aba1",  {"cin","a","b","o","cout"} },
+    { BAC_BOX_MUL      , "mult_",                 "ab?",    {"a","b","o"} },            // ? = a * b
+    { BAC_BOX_DIV      , "div_",                  "ab?",    {"a","b","o"} },            // ? = 
+    { BAC_BOX_MOD      , "mod_",                  "ab?",    {"a","b","o"} },            // ? =
+    { BAC_BOX_REM      , "rem_",                  "ab?",    {"a","b","o"} },            // ? =
+    { BAC_BOX_SHIL     , "shift_left_",           "1aba",   {"cin","a","amount","o"} },
+    { BAC_BOX_SHIR     , "shift_right_",          "1aba",   {"cin","a","amount","o"} },
+    { BAC_BOX_ROTL     , "rotate_left_",          "aba",    {"a","amount","o"} },
+    { BAC_BOX_ROTR     , "rotate_right_",         "aba",    {"a","amount","o"} },
+    { BAC_BOX_RAND     , "reduce_and_",           "ab1",    {"a","o"} },
+    { BAC_BOX_ROR      , "reduce_or_",            "ab1",    {"a","o"} },
+    { BAC_BOX_RXOR     , "reduce_xor_",           "ab1",    {"a","o"} },
+    { BAC_BOX_RNAND    , "reduce_nand_",          "ab1",    {"a","o"} },
+    { BAC_BOX_RNOR     , "reduce_nor_",           "ab1",    {"a","o"} },
+    { BAC_BOX_RXNOR    , "reduce_xnor_",          "ab1",    {"a","o"} },
+    { BAC_BOX_LTHAN    , "LessThan_",             "1ab1",   {"cin","a","b","o"} },
+    { BAC_BOX_NMUX     , "Mux_",                  "ab1",    {"sel","data","o"} },       
+    { BAC_BOX_SEL      , "Select_",               "aaa",    {"sel","data","o"} },
+    { BAC_BOX_DEC      , "Decoder_",              "a?",     {"a","o"} },                // ? = (1 << a)
+    { BAC_BOX_EDEC     , "EnabledDecoder_",       "1a?",    {"en","i","o"} },           // ? = (1 << a)
+    { BAC_BOX_PSEL     , "PrioSelect_",           "1aaa",   {"cin","sel","data","o"} },
+    { BAC_BOX_RAM      , "DualPortRam_",          "1abab",  {"write_enable","write_address","write_data","read_address","read_data"} },
+    { BAC_BOX_RAMR     , "ReadPort_",             "1a1b",   {"read_enable", "read_address", "RAM", "read_data" } },
+    { BAC_BOX_RAMW     , "WritePort_",            "1ab1",   {"write_enable","write_address","write_data", "RAM"} },
+    { BAC_BOX_RAMWC    , "ClockedWritePort_",     "11ab1",  {"clk","write_enable","write_address","write_data", "RAM"} },
+    { BAC_BOX_LUT      , "lut",                   "?",      {"i","o"} },
+    { BAC_BOX_AND      , "and_",                  "aaa",    {"a","b","o"} },
+    { BAC_BOX_OR       , "or_",                   "aaa",    {"a","b","o"} },
+    { BAC_BOX_XOR      , "xor_",                  "aaa",    {"a","b","o"} },
+    { BAC_BOX_NAND     , "nand_",                 "aaa",    {"a","b","o"} },
+    { BAC_BOX_NOR      , "nor_",                  "aaa",    {"a","b","o"} },
+    { BAC_BOX_XNOR     , "xnor_",                 "aaa",    {"a","b","o"} },
+    { BAC_BOX_BUF      , "buf_",                  "aa",     {"i","o"} },
+    { BAC_BOX_INV      , "inv_",                  "aa",     {"i","o"} },
+    { BAC_BOX_TRI      , "tri_",                  "a1a",    {"i","c","o"} },
+    { BAC_BOX_SUB      , "sub_",                  "aaa",    {"a","b","o"} },
+    { BAC_BOX_MIN      , "unary_minus_",          "aa",     {"i","o"} },
+    { BAC_BOX_EQU      , "equal_",                "aa1",    {"a","b","o"} },
+    { BAC_BOX_NEQU     , "not_equal_",            "aa1",    {"a","b","o"} },
+    { BAC_BOX_MUX      , "mux_",                  "1aaa",   {"cond","d1","d0","o"} },                       // changed order
+    { BAC_BOX_NMUX     , "wide_mux_",             "ab?",    {"sel","data","o"} },             // ? = b / (1 << a)
+    { BAC_BOX_SEL      , "wide_select_",          "ab?",    {"sel","data","o"} },             // ? = b / a
+    { BAC_BOX_DFF      , "wide_dff_",             "aaa1a",  {"d","async_val","async_cond","clock","q"} },
+    { BAC_BOX_DFFRS    , "wide_dlatch_",          "aaa1a",  {"d","set","reset","clock","q"} },           
+    { BAC_BOX_LATCHRS  , "wide_dffrs_",           "aaa1a",  {"d","set","reset","clock","q"} },           
+    { BAC_BOX_LATCH    , "wide_dlatchrs_",        "aaa1a",  {"d","async_val","async_cond","clock","q"} },
+    { BAC_BOX_PSEL     , "wide_prio_select_",     "ab??",   {"sel","data","carry_in","o"} },  // ? = b / a
+    { BAC_BOX_POW      , "pow_",                  "abc",    {"a","b","o"} },                  // ? = 
+    { BAC_BOX_PENC     , "PrioEncoder_",          "a?",     {"sel","o"} },
+    { BAC_BOX_ABS      , "abs",                   "aa",     {"i","o"} }
+};
+*/
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Count range size.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Psr_ManRangeSizeName( Psr_Ntk_t * p, int Name )
+{
+    return 1;
+}
+static inline int Psr_ManRangeSizeRange( Psr_Ntk_t * p, int Range )
+{
+    char * pStr; 
+    int Left, Right;
+    if ( Range == 0 ) 
+        return 1;
+    pStr = Psr_NtkStr( p, Range );
+    assert( pStr[0] == '[' );
+    Left = Right = atoi( pStr + 1 );
+    pStr = strstr( pStr, "=" );
+    if ( pStr )
+        Right = atoi( pStr + 1 );
+    return 1 + (Left > Right ? Left - Right : Right - Left);
+}
+static inline int Psr_ManRangeSizeConst( Psr_Ntk_t * p, int Const )
+{
+    return atoi( Psr_NtkStr(p, Const) );
+}
+static inline int Psr_ManRangeSizeConcat( Psr_Ntk_t * p, int Con )
+{
+    extern int Psr_ManRangeSizeArray( Psr_Ntk_t * p, Vec_Int_t * vSlices, int Start, int Stop );
+    Vec_Int_t * vSigs = Psr_CatSignals(p, Con);
+    return Psr_ManRangeSizeArray( p, vSigs, 0, Vec_IntSize(vSigs) );
+}
+static inline int Psr_ManRangeSizeSignal( Psr_Ntk_t * p, int Sig )
+{
+    int Value = Abc_Lit2Var2( Sig );
+    Psr_ManType_t Type = (Psr_ManType_t)Abc_Lit2Att2( Sig );
+    if ( Type == BAC_PRS_NAME )
+        return Psr_ManRangeSizeName( p, Value );
+    if ( Type == BAC_PRS_SLICE )
+        return Psr_ManRangeSizeRange( p, Psr_SliceRange(p, Value) );
+    if ( Type == BAC_PRS_CONST )
+        return Psr_ManRangeSizeConst( p, Value );
+    if ( Type == BAC_PRS_CONCAT )
+        return Psr_ManRangeSizeConcat( p, Value );
+    assert( 0 );
+    return 0;
+}
+int Psr_ManRangeSizeArray( Psr_Ntk_t * p, Vec_Int_t * vSlices, int Start, int Stop )
+{
+    int i, Sig, Count = 0;
+    assert( Vec_IntSize(vSlices) > 0 );
+    Vec_IntForEachEntryStartStop( vSlices, Sig, i, Start, Stop )
+        Count += Psr_ManRangeSizeSignal( p, Sig );
+    return Count;
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/cba/cbaPtrAbc.c b/src/base/bac/bacPrtAbc.c
index 2ca60d0b..2de21149 100644
--- a/src/base/cba/cbaPtrAbc.c
+++ b/src/base/bac/bacPrtAbc.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaPtrAbc.c]
+  FileName    [bacPtrAbc.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,11 +14,11 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaPtrAbc.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacPtrAbc.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
+#include "bac.h"
 #include "base/abc/abc.h"
 #include "map/mio/mio.h"
 #include "base/main/mainInt.h"
@@ -54,16 +54,16 @@ char * Ptr_HopToType( Abc_Obj_t * pObj )
     assert( Abc_ObjIsNode(pObj) );
     uTruth = Hop_ManComputeTruth6( (Hop_Man_t *)Abc_ObjNtk(pObj)->pManFunc, (Hop_Obj_t *)pObj->pData, Abc_ObjFaninNum(pObj) );
 /*
-    if ( uTruth ==  0 )                           return "CBA_BOX_C0";
-    if ( uTruth == ~(word)0 )                     return "CBA_BOX_C1";
-    if ( uTruth ==  uTruths6[0] )                 return "CBA_BOX_BUF";
-    if ( uTruth == ~uTruths6[0] )                 return "CBA_BOX_INV";
-    if ( uTruth == (uTruths6[0] & uTruths6[1]) )  return "CBA_BOX_AND";
-    if ( uTruth ==~(uTruths6[0] & uTruths6[1]) )  return "CBA_BOX_NAND";
-    if ( uTruth == (uTruths6[0] | uTruths6[1]) )  return "CBA_BOX_OR";
-    if ( uTruth ==~(uTruths6[0] | uTruths6[1]) )  return "CBA_BOX_NOR";
-    if ( uTruth == (uTruths6[0] ^ uTruths6[1]) )  return "CBA_BOX_XOR";
-    if ( uTruth ==~(uTruths6[0] ^ uTruths6[1]) )  return "CBA_BOX_XNOR";
+    if ( uTruth ==  0 )                           return "BAC_BOX_C0";
+    if ( uTruth == ~(word)0 )                     return "BAC_BOX_C1";
+    if ( uTruth ==  uTruths6[0] )                 return "BAC_BOX_BUF";
+    if ( uTruth == ~uTruths6[0] )                 return "BAC_BOX_INV";
+    if ( uTruth == (uTruths6[0] & uTruths6[1]) )  return "BAC_BOX_AND";
+    if ( uTruth ==~(uTruths6[0] & uTruths6[1]) )  return "BAC_BOX_NAND";
+    if ( uTruth == (uTruths6[0] | uTruths6[1]) )  return "BAC_BOX_OR";
+    if ( uTruth ==~(uTruths6[0] | uTruths6[1]) )  return "BAC_BOX_NOR";
+    if ( uTruth == (uTruths6[0] ^ uTruths6[1]) )  return "BAC_BOX_XOR";
+    if ( uTruth ==~(uTruths6[0] ^ uTruths6[1]) )  return "BAC_BOX_XNOR";
 */
     if ( uTruth ==  0 )                           return "Const0T";
     if ( uTruth == ~(word)0 )                     return "Const1T";
@@ -219,17 +219,17 @@ void Ptr_ManExperiment( Abc_Ntk_t * pNtk )
     abctime clk = Abc_Clock();
     char * pFileName = Extra_FileNameGenericAppend(pNtk->pDesign->pName, "_out.blif");
     Vec_Ptr_t * vDes = Ptr_AbcDeriveDes( pNtk );
-    printf( "Converting to Ptr:  Memory = %6.3f MB  ", 1.0*Cba_PtrMemory(vDes)/(1<<20) );
+    printf( "Converting to Ptr:  Memory = %6.3f MB  ", 1.0*Bac_PtrMemory(vDes)/(1<<20) );
     Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
-    Cba_PtrDumpBlif( pFileName, vDes );
+    Bac_PtrDumpBlif( pFileName, vDes );
     printf( "Finished writing output file \"%s\".  ", pFileName );
     Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
-    Cba_PtrFree( vDes );
+    Bac_PtrFree( vDes );
 }
 
 /**Function*************************************************************
 
-  Synopsis    [Create Cba_Man_t from tech-ind Ptr.]
+  Synopsis    [Create Bac_Man_t from tech-ind Ptr.]
 
   Description []
                
@@ -240,17 +240,17 @@ void Ptr_ManExperiment( Abc_Ntk_t * pNtk )
 ***********************************************************************/
 static inline int Ptr_NameToType( char * pSop )
 {
-    if ( !strcmp(pSop, "Const0T") )      return CBA_BOX_CF;
-    if ( !strcmp(pSop, "Const1T") )      return CBA_BOX_CT;
-    if ( !strcmp(pSop, "BufT") )         return CBA_BOX_BUF;
-    if ( !strcmp(pSop, "InvT") )         return CBA_BOX_INV;
-    if ( !strcmp(pSop, "AndT") )         return CBA_BOX_AND;
-    if ( !strcmp(pSop, "NandT") )        return CBA_BOX_NAND;
-    if ( !strcmp(pSop, "OrT") )          return CBA_BOX_OR;
-    if ( !strcmp(pSop, "NorT") )         return CBA_BOX_NOR;
-    if ( !strcmp(pSop, "XorT") )         return CBA_BOX_XOR;
-    if ( !strcmp(pSop, "XnorT") )        return CBA_BOX_XNOR;
-    return CBA_OBJ_BOX;
+    if ( !strcmp(pSop, "Const0T") )      return BAC_BOX_CF;
+    if ( !strcmp(pSop, "Const1T") )      return BAC_BOX_CT;
+    if ( !strcmp(pSop, "BufT") )         return BAC_BOX_BUF;
+    if ( !strcmp(pSop, "InvT") )         return BAC_BOX_INV;
+    if ( !strcmp(pSop, "AndT") )         return BAC_BOX_AND;
+    if ( !strcmp(pSop, "NandT") )        return BAC_BOX_NAND;
+    if ( !strcmp(pSop, "OrT") )          return BAC_BOX_OR;
+    if ( !strcmp(pSop, "NorT") )         return BAC_BOX_NOR;
+    if ( !strcmp(pSop, "XorT") )         return BAC_BOX_XOR;
+    if ( !strcmp(pSop, "XnorT") )        return BAC_BOX_XNOR;
+    return BAC_OBJ_BOX;
 }
 int Ptr_ManCountNtk( Vec_Ptr_t * vNtk )
 {
@@ -266,14 +266,14 @@ int Ptr_ManCountNtk( Vec_Ptr_t * vNtk )
         Counter += Vec_PtrSize(vBox)/2;
     return Counter;
 }
-int Cba_BoxCountOutputs( Cba_Ntk_t * pNtk, char * pBoxNtk )
+int Bac_BoxCountOutputs( Bac_Ntk_t * pNtk, char * pBoxNtk )
 {
-    int ModuleId = Cba_ManNtkFindId( pNtk->pDesign, pBoxNtk );
+    int ModuleId = Bac_ManNtkFindId( pNtk->pDesign, pBoxNtk );
     if ( ModuleId == 0 )
         return 1;
-    return Cba_NtkPoNumAlloc( Cba_ManNtk(pNtk->pDesign, ModuleId) );
+    return Bac_NtkPoNumAlloc( Bac_ManNtk(pNtk->pDesign, ModuleId) );
 }
-int Cba_NtkDeriveFromPtr( Cba_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap, Vec_Int_t * vBox2Id )
+int Bac_NtkDeriveFromPtr( Bac_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap, Vec_Int_t * vBox2Id )
 {
     char * pName, * pModuleName = (char *)Vec_PtrEntry(vNtk, 0);
     Vec_Ptr_t * vInputs  = (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1);
@@ -282,17 +282,17 @@ int Cba_NtkDeriveFromPtr( Cba_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap,
     int i, k, iObj, iTerm, NameId;
     // start network with the given name
     NameId = Abc_NamStrFindOrAdd( pNtk->pDesign->pStrs, pModuleName, NULL );
-    assert( Cba_NtkNameId(pNtk) == NameId );
+    assert( Bac_NtkNameId(pNtk) == NameId );
     // map driven NameIds into their ObjIds for PIs
     Vec_PtrForEachEntry( char *, vInputs, pName, i )
     {
         NameId = Abc_NamStrFindOrAdd( pNtk->pDesign->pStrs, pName, NULL );
         if ( Vec_IntGetEntryFull(vMap, NameId) != -1 )
             { printf( "PI with name \"%s\" is not unique module \"%s\".\n", pName, pModuleName ); return 0; }
-        iObj = Cba_ObjAlloc( pNtk, CBA_OBJ_PI, -1 );
-        Cba_ObjSetName( pNtk, iObj, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+        iObj = Bac_ObjAlloc( pNtk, BAC_OBJ_PI, -1 );
+        Bac_ObjSetName( pNtk, iObj, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
         Vec_IntSetEntryFull( vMap, NameId, iObj );
-        Cba_NtkAddInfo( pNtk, Abc_Var2Lit2(NameId, 1), -1, -1 );
+        Bac_NtkAddInfo( pNtk, Abc_Var2Lit2(NameId, 1), -1, -1 );
     }
     // map driven NameIds into their ObjIds for BOs
     Vec_IntClear( vBox2Id );
@@ -300,22 +300,22 @@ int Cba_NtkDeriveFromPtr( Cba_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap,
     {
         char * pBoxNtk = (char *)Vec_PtrEntry(vBox, 0);
         char * pBoxName = (char *)Vec_PtrEntry(vBox, 1);
-        int nOutputs = Cba_BoxCountOutputs( pNtk, pBoxNtk );
+        int nOutputs = Bac_BoxCountOutputs( pNtk, pBoxNtk );
         int nInputs = Vec_PtrSize(vBox)/2 - nOutputs - 1;
-        int NtkId = Cba_ManNtkFindId( pNtk->pDesign, pBoxNtk );
+        int NtkId = Bac_ManNtkFindId( pNtk->pDesign, pBoxNtk );
         assert( Vec_PtrSize(vBox) % 2 == 0 );
         assert( nOutputs > 0 && 2*(nOutputs + 1) <= Vec_PtrSize(vBox) );
-        iObj = Cba_BoxAlloc( pNtk, (Cba_ObjType_t)Ptr_NameToType(pBoxNtk), nInputs, nOutputs, NtkId );
+        iObj = Bac_BoxAlloc( pNtk, (Bac_ObjType_t)Ptr_NameToType(pBoxNtk), nInputs, nOutputs, NtkId );
         if ( NtkId > 0 )
-            Cba_NtkSetHost( Cba_ManNtk(pNtk->pDesign, NtkId), Cba_NtkId(pNtk), iObj );
-        Cba_ObjSetName( pNtk, iObj, Abc_Var2Lit2(Abc_NamStrFindOrAdd(pNtk->pDesign->pStrs, pBoxName, NULL), CBA_NAME_BIN) );
-        Cba_BoxForEachBo( pNtk, iObj, iTerm, k )
+            Bac_NtkSetHost( Bac_ManNtk(pNtk->pDesign, NtkId), Bac_NtkId(pNtk), iObj );
+        Bac_ObjSetName( pNtk, iObj, Abc_Var2Lit2(Abc_NamStrFindOrAdd(pNtk->pDesign->pStrs, pBoxName, NULL), BAC_NAME_BIN) );
+        Bac_BoxForEachBo( pNtk, iObj, iTerm, k )
         {
             pName = (char *)Vec_PtrEntry( vBox, Vec_PtrSize(vBox) - 2*(nOutputs - k) + 1 );
             NameId = Abc_NamStrFindOrAdd( pNtk->pDesign->pStrs, pName, NULL );
             if ( Vec_IntGetEntryFull(vMap, NameId) != -1 )
                 { printf( "Signal \"%s\" has multiple drivers in module \"%s\".\n", pName, pModuleName ); return 0; }
-            Cba_ObjSetName( pNtk, iTerm, Abc_Var2Lit2(NameId, CBA_NAME_BIN) );
+            Bac_ObjSetName( pNtk, iTerm, Abc_Var2Lit2(NameId, BAC_NAME_BIN) );
             Vec_IntSetEntryFull( vMap, NameId, iTerm );
         }
         Vec_IntPush( vBox2Id, iObj );
@@ -325,13 +325,13 @@ int Cba_NtkDeriveFromPtr( Cba_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap,
     Vec_PtrForEachEntry( Vec_Ptr_t *, vBoxes, vBox, i )
     {
         iObj = Vec_IntEntry( vBox2Id, i );
-        Cba_BoxForEachBi( pNtk, iObj, iTerm, k )
+        Bac_BoxForEachBi( pNtk, iObj, iTerm, k )
         {
             pName = (char *)Vec_PtrEntry( vBox, 2*(k + 1) + 1 );
             NameId = Abc_NamStrFindOrAdd( pNtk->pDesign->pStrs, pName, NULL );
             if ( Vec_IntGetEntryFull(vMap, NameId) == -1 )
                 printf( "Signal \"%s\" in not driven in module \"%s\".\n", pName, pModuleName );
-            Cba_ObjSetFanin( pNtk, iTerm, Vec_IntGetEntryFull(vMap, NameId) );
+            Bac_ObjSetFanin( pNtk, iTerm, Vec_IntGetEntryFull(vMap, NameId) );
         }
     }
     // connect POs
@@ -340,44 +340,44 @@ int Cba_NtkDeriveFromPtr( Cba_Ntk_t * pNtk, Vec_Ptr_t * vNtk, Vec_Int_t * vMap,
         NameId = Abc_NamStrFindOrAdd( pNtk->pDesign->pStrs, pName, NULL );
         if ( Vec_IntGetEntryFull(vMap, NameId) == -1 )
             printf( "PO with name \"%s\" in not driven in module \"%s\".\n", pName, pModuleName );
-        iObj = Cba_ObjAlloc( pNtk, CBA_OBJ_PO, Vec_IntGetEntryFull(vMap, NameId) );
-        Cba_NtkAddInfo( pNtk, Abc_Var2Lit2(NameId, 2), -1, -1 );
+        iObj = Bac_ObjAlloc( pNtk, BAC_OBJ_PO, Vec_IntGetEntryFull(vMap, NameId) );
+        Bac_NtkAddInfo( pNtk, Abc_Var2Lit2(NameId, 2), -1, -1 );
     }
     // update map
-    Cba_NtkForEachCi( pNtk, iObj )
-        Vec_IntSetEntryFull( vMap, Cba_ObjNameId(pNtk, iObj), -1 );
+    Bac_NtkForEachCi( pNtk, iObj )
+        Vec_IntSetEntryFull( vMap, Bac_ObjNameId(pNtk, iObj), -1 );
     // double check
     Vec_IntForEachEntry( vMap, iObj, i )
         assert( iObj == -1 );
-    assert( Cba_NtkObjNum(pNtk) == Vec_StrCap(&pNtk->vType) );
+    assert( Bac_NtkObjNum(pNtk) == Vec_StrCap(&pNtk->vType) );
     return 1;
 }
-Cba_Man_t * Cba_PtrTransformToCba( Vec_Ptr_t * vDes )
+Bac_Man_t * Bac_PtrTransformToCba( Vec_Ptr_t * vDes )
 {
     char * pName = (char *)Vec_PtrEntry(vDes, 0);
-    Cba_Man_t * pNew = Cba_ManAlloc( pName, Vec_PtrSize(vDes) - 1 );
+    Bac_Man_t * pNew = Bac_ManAlloc( pName, Vec_PtrSize(vDes) - 1 );
     Vec_Int_t * vMap = Vec_IntStartFull( 1000 );
     Vec_Int_t * vBox2Id = Vec_IntAlloc( 1000 );
     // create interfaces
-    Cba_Ntk_t * pNtk; int i;
-    Cba_ManForEachNtk( pNew, pNtk, i )
+    Bac_Ntk_t * pNtk; int i;
+    Bac_ManForEachNtk( pNew, pNtk, i )
     {
         Vec_Ptr_t * vNtk = (Vec_Ptr_t *)Vec_PtrEntry(vDes, i);
         Vec_Ptr_t * vInputs = (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1);
         Vec_Ptr_t * vOutputs = (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2);
         int NameId = Abc_NamStrFindOrAdd( pNew->pStrs, (char *)Vec_PtrEntry(vNtk, 0), NULL );
-        Cba_NtkAlloc( pNtk, NameId, Vec_PtrSize(vInputs), Vec_PtrSize(vOutputs), Ptr_ManCountNtk(vNtk) );
-        Cba_NtkStartNames( pNtk );
+        Bac_NtkAlloc( pNtk, NameId, Vec_PtrSize(vInputs), Vec_PtrSize(vOutputs), Ptr_ManCountNtk(vNtk) );
+        Bac_NtkStartNames( pNtk );
     }
     // parse the networks
-    Cba_ManForEachNtk( pNew, pNtk, i )
+    Bac_ManForEachNtk( pNew, pNtk, i )
     {
         Vec_Ptr_t * vNtk = (Vec_Ptr_t *)Vec_PtrEntry(vDes, i);
-        if ( !Cba_NtkDeriveFromPtr( pNtk, vNtk, vMap, vBox2Id ) )
+        if ( !Bac_NtkDeriveFromPtr( pNtk, vNtk, vMap, vBox2Id ) )
             break;
     }
-    if ( i <= Cba_ManNtkNum(pNew) )
-       Cba_ManFree(pNew), pNew = NULL;
+    if ( i <= Bac_ManNtkNum(pNew) )
+       Bac_ManFree(pNew), pNew = NULL;
     Vec_IntFree( vBox2Id );
     Vec_IntFree( vMap );
     return pNew;
@@ -386,7 +386,7 @@ Cba_Man_t * Cba_PtrTransformToCba( Vec_Ptr_t * vDes )
 
 /**Function*************************************************************
 
-  Synopsis    [Create Ptr from mapped Cba_Man_t.]
+  Synopsis    [Create Ptr from mapped Bac_Man_t.]
 
   Description []
                
@@ -395,71 +395,71 @@ Cba_Man_t * Cba_PtrTransformToCba( Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-Vec_Ptr_t * Cba_NtkTransformToPtrBox( Cba_Ntk_t * p, int iBox )
+Vec_Ptr_t * Bac_NtkTransformToPtrBox( Bac_Ntk_t * p, int iBox )
 {
-    int i, iTerm, fUser = Cba_ObjIsBoxUser( p, iBox );
-    Cba_Ntk_t * pBoxNtk = Cba_BoxNtk( p, iBox );
+    int i, iTerm, fUser = Bac_ObjIsBoxUser( p, iBox );
+    Bac_Ntk_t * pBoxNtk = Bac_BoxNtk( p, iBox );
     Mio_Library_t * pLib = (Mio_Library_t *)p->pDesign->pMioLib;
-    Mio_Gate_t * pGate = pLib ? Mio_LibraryReadGateByName( pLib, Cba_BoxNtkName(p, iBox), NULL ) : NULL;
-    Vec_Ptr_t * vBox = Vec_PtrAllocExact( 2*Cba_BoxSize(p, iBox) );
-    Vec_PtrPush( vBox, Cba_BoxNtkName(p, iBox) );
-    Vec_PtrPush( vBox, Cba_ObjNameStr(p, iBox) );
-    Cba_BoxForEachBi( p, iBox, iTerm, i )
+    Mio_Gate_t * pGate = pLib ? Mio_LibraryReadGateByName( pLib, Bac_BoxNtkName(p, iBox), NULL ) : NULL;
+    Vec_Ptr_t * vBox = Vec_PtrAllocExact( 2*Bac_BoxSize(p, iBox) );
+    Vec_PtrPush( vBox, Bac_BoxNtkName(p, iBox) );
+    Vec_PtrPush( vBox, Bac_ObjNameStr(p, iBox) );
+    Bac_BoxForEachBi( p, iBox, iTerm, i )
     {
-        Vec_PtrPush( vBox, fUser ? Cba_ObjNameStr(pBoxNtk, Cba_NtkPi(pBoxNtk, i)) : Mio_GateReadPinName(pGate, i) );
-        Vec_PtrPush( vBox, Cba_ObjNameStr(p, iTerm) );
+        Vec_PtrPush( vBox, fUser ? Bac_ObjNameStr(pBoxNtk, Bac_NtkPi(pBoxNtk, i)) : Mio_GateReadPinName(pGate, i) );
+        Vec_PtrPush( vBox, Bac_ObjNameStr(p, iTerm) );
     }
-    Cba_BoxForEachBo( p, iBox, iTerm, i )
+    Bac_BoxForEachBo( p, iBox, iTerm, i )
     {
-        Vec_PtrPush( vBox, fUser ? Cba_ObjNameStr(pBoxNtk, Cba_NtkPo(pBoxNtk, i)) : Mio_GateReadOutName(pGate) );
-        Vec_PtrPush( vBox, Cba_ObjNameStr(p, iTerm) );
+        Vec_PtrPush( vBox, fUser ? Bac_ObjNameStr(pBoxNtk, Bac_NtkPo(pBoxNtk, i)) : Mio_GateReadOutName(pGate) );
+        Vec_PtrPush( vBox, Bac_ObjNameStr(p, iTerm) );
     }
     assert( Ptr_CheckArray(vBox) );
     return vBox;
 }
-Vec_Ptr_t * Cba_NtkTransformToPtrBoxes( Cba_Ntk_t * p )
+Vec_Ptr_t * Bac_NtkTransformToPtrBoxes( Bac_Ntk_t * p )
 {
     int iBox;
-    Vec_Ptr_t * vBoxes = Vec_PtrAllocExact( Cba_NtkBoxNum(p) );
-    Cba_NtkForEachBox( p, iBox )
-        Vec_PtrPush( vBoxes, Cba_NtkTransformToPtrBox(p, iBox) );
+    Vec_Ptr_t * vBoxes = Vec_PtrAllocExact( Bac_NtkBoxNum(p) );
+    Bac_NtkForEachBox( p, iBox )
+        Vec_PtrPush( vBoxes, Bac_NtkTransformToPtrBox(p, iBox) );
     assert( Ptr_CheckArray(vBoxes) );
     return vBoxes;
 }
 
-Vec_Ptr_t * Cba_NtkTransformToPtrInputs( Cba_Ntk_t * p )
+Vec_Ptr_t * Bac_NtkTransformToPtrInputs( Bac_Ntk_t * p )
 {
     int i, iTerm;
-    Vec_Ptr_t * vSigs = Vec_PtrAllocExact( Cba_NtkPiNum(p) );
-    Cba_NtkForEachPi( p, iTerm, i )
-        Vec_PtrPush( vSigs, Cba_ObjNameStr(p, iTerm) );
+    Vec_Ptr_t * vSigs = Vec_PtrAllocExact( Bac_NtkPiNum(p) );
+    Bac_NtkForEachPi( p, iTerm, i )
+        Vec_PtrPush( vSigs, Bac_ObjNameStr(p, iTerm) );
     assert( Ptr_CheckArray(vSigs) );
     return vSigs;
 }
-Vec_Ptr_t * Cba_NtkTransformToPtrOutputs( Cba_Ntk_t * p )
+Vec_Ptr_t * Bac_NtkTransformToPtrOutputs( Bac_Ntk_t * p )
 {
     int i, iTerm;
-    Vec_Ptr_t * vSigs = Vec_PtrAllocExact( Cba_NtkPoNum(p) );
-    Cba_NtkForEachPo( p, iTerm, i )
-        Vec_PtrPush( vSigs, Cba_ObjNameStr(p, iTerm) );
+    Vec_Ptr_t * vSigs = Vec_PtrAllocExact( Bac_NtkPoNum(p) );
+    Bac_NtkForEachPo( p, iTerm, i )
+        Vec_PtrPush( vSigs, Bac_ObjNameStr(p, iTerm) );
     assert( Ptr_CheckArray(vSigs) );
     return vSigs;
 }
-Vec_Ptr_t * Cba_NtkTransformToPtr( Cba_Ntk_t * p )
+Vec_Ptr_t * Bac_NtkTransformToPtr( Bac_Ntk_t * p )
 {
     Vec_Ptr_t * vNtk = Vec_PtrAllocExact(5);
-    Vec_PtrPush( vNtk, Cba_NtkName(p) );
-    Vec_PtrPush( vNtk, Cba_NtkTransformToPtrInputs(p) );
-    Vec_PtrPush( vNtk, Cba_NtkTransformToPtrOutputs(p) );
+    Vec_PtrPush( vNtk, Bac_NtkName(p) );
+    Vec_PtrPush( vNtk, Bac_NtkTransformToPtrInputs(p) );
+    Vec_PtrPush( vNtk, Bac_NtkTransformToPtrOutputs(p) );
     Vec_PtrPush( vNtk, Vec_PtrAllocExact(0) );
-    Vec_PtrPush( vNtk, Cba_NtkTransformToPtrBoxes(p) );
+    Vec_PtrPush( vNtk, Bac_NtkTransformToPtrBoxes(p) );
     assert( Ptr_CheckArray(vNtk) );
     return vNtk;
 }
-Vec_Ptr_t * Cba_PtrDeriveFromCba( Cba_Man_t * p )
+Vec_Ptr_t * Bac_PtrDeriveFromCba( Bac_Man_t * p )
 {
     Vec_Ptr_t * vDes;
-    Cba_Ntk_t * pTemp; int i;
+    Bac_Ntk_t * pTemp; int i;
     if ( p == NULL )
         return NULL;
     if ( p->pMioLib == NULL )
@@ -467,11 +467,11 @@ Vec_Ptr_t * Cba_PtrDeriveFromCba( Cba_Man_t * p )
         printf( "Cannot transform CBA network into Ptr because it is not mapped.\n" );
         return NULL;
     }
-    Cba_ManAssignInternWordNames( p );
-    vDes = Vec_PtrAllocExact( 1 + Cba_ManNtkNum(p) );
+    Bac_ManAssignInternWordNames( p );
+    vDes = Vec_PtrAllocExact( 1 + Bac_ManNtkNum(p) );
     Vec_PtrPush( vDes, p->pName );
-    Cba_ManForEachNtk( p, pTemp, i )
-        Vec_PtrPush( vDes, Cba_NtkTransformToPtr(pTemp) );
+    Bac_ManForEachNtk( p, pTemp, i )
+        Vec_PtrPush( vDes, Bac_NtkTransformToPtr(pTemp) );
     assert( Ptr_CheckArray(vDes) );
     return vDes;
 }
diff --git a/src/base/cba/cbaPtr.c b/src/base/bac/bacPtr.c
index af97a141..c3fc5fd8 100644
--- a/src/base/cba/cbaPtr.c
+++ b/src/base/bac/bacPtr.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaPtr.c]
+  FileName    [bacPtr.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,14 +14,14 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaPtr.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacPtr.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
 #include "base/abc/abc.h"
 #include "base/main/mainInt.h"
 #include "map/mio/mio.h"
-#include "cba.h"
+#include "bac.h"
 
 ABC_NAMESPACE_IMPL_START
 
@@ -83,7 +83,7 @@ typedef enum {
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_PtrFreeNtk( Vec_Ptr_t * vNtk )
+void Bac_PtrFreeNtk( Vec_Ptr_t * vNtk )
 {
     Vec_PtrFree( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1) );
     Vec_PtrFree( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2) );
@@ -95,12 +95,12 @@ void Cba_PtrFreeNtk( Vec_Ptr_t * vNtk )
         Vec_FltFree( (Vec_Flt_t *)Vec_PtrEntry(vNtk, 6) );
     Vec_PtrFree( vNtk );
 }
-void Cba_PtrFree( Vec_Ptr_t * vDes )
+void Bac_PtrFree( Vec_Ptr_t * vDes )
 {
     Vec_Ptr_t * vNtk; int i;
     if ( !vDes ) return;
     Vec_PtrForEachEntryStart( Vec_Ptr_t *, vDes, vNtk, i, 1 )
-        Cba_PtrFreeNtk( vNtk );
+        Bac_PtrFreeNtk( vNtk );
     Vec_PtrFree( vDes );
 }
 
@@ -115,31 +115,31 @@ void Cba_PtrFree( Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-int Cba_PtrMemoryArray( Vec_Ptr_t * vArray )
+int Bac_PtrMemoryArray( Vec_Ptr_t * vArray )
 {
     return (int)Vec_PtrMemory(vArray);
 }
-int Cba_PtrMemoryArrayArray( Vec_Ptr_t * vArrayArray )
+int Bac_PtrMemoryArrayArray( Vec_Ptr_t * vArrayArray )
 {
     Vec_Ptr_t * vArray; int i, nBytes = 0;
     Vec_PtrForEachEntry( Vec_Ptr_t *, vArrayArray, vArray, i )
-        nBytes += Cba_PtrMemoryArray(vArray);
+        nBytes += Bac_PtrMemoryArray(vArray);
     return nBytes;
 }
-int Cba_PtrMemoryNtk( Vec_Ptr_t * vNtk )
+int Bac_PtrMemoryNtk( Vec_Ptr_t * vNtk )
 {
     int nBytes = (int)Vec_PtrMemory(vNtk);
-    nBytes += Cba_PtrMemoryArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1) );
-    nBytes += Cba_PtrMemoryArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2) );
-    nBytes += Cba_PtrMemoryArrayArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 3) );
-    nBytes += Cba_PtrMemoryArrayArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
+    nBytes += Bac_PtrMemoryArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1) );
+    nBytes += Bac_PtrMemoryArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2) );
+    nBytes += Bac_PtrMemoryArrayArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 3) );
+    nBytes += Bac_PtrMemoryArrayArray( (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
     return nBytes;
 }
-int Cba_PtrMemory( Vec_Ptr_t * vDes )
+int Bac_PtrMemory( Vec_Ptr_t * vDes )
 {
     Vec_Ptr_t * vNtk; int i, nBytes = (int)Vec_PtrMemory(vDes);
     Vec_PtrForEachEntryStart( Vec_Ptr_t *, vDes, vNtk, i, 1 )
-        nBytes += Cba_PtrMemoryNtk(vNtk);
+        nBytes += Bac_PtrMemoryNtk(vNtk);
     return nBytes;
 }
 
@@ -154,13 +154,13 @@ int Cba_PtrMemory( Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_PtrDumpSignalsBlif( FILE * pFile, Vec_Ptr_t * vSigs, int fSkipLastComma )
+void Bac_PtrDumpSignalsBlif( FILE * pFile, Vec_Ptr_t * vSigs, int fSkipLastComma )
 {
     char * pSig; int i;
     Vec_PtrForEachEntry( char *, vSigs, pSig, i )
         fprintf( pFile, " %s", pSig );
 }
-void Cba_PtrDumpBoxBlif( FILE * pFile, Vec_Ptr_t * vBox )
+void Bac_PtrDumpBoxBlif( FILE * pFile, Vec_Ptr_t * vBox )
 {
     char * pName; int i;
     fprintf( pFile, ".subckt" );
@@ -170,26 +170,26 @@ void Cba_PtrDumpBoxBlif( FILE * pFile, Vec_Ptr_t * vBox )
         fprintf( pFile, " %s=%s", pName, (char *)Vec_PtrEntry(vBox, i+1) ), i++;
     fprintf( pFile, "\n" );
 }
-void Cba_PtrDumpBoxesBlif( FILE * pFile, Vec_Ptr_t * vBoxes )
+void Bac_PtrDumpBoxesBlif( FILE * pFile, Vec_Ptr_t * vBoxes )
 {
     Vec_Ptr_t * vBox; int i;
     Vec_PtrForEachEntry( Vec_Ptr_t *, vBoxes, vBox, i )
-        Cba_PtrDumpBoxBlif( pFile, vBox );
+        Bac_PtrDumpBoxBlif( pFile, vBox );
 }
-void Cba_PtrDumpModuleBlif( FILE * pFile, Vec_Ptr_t * vNtk )
+void Bac_PtrDumpModuleBlif( FILE * pFile, Vec_Ptr_t * vNtk )
 {
     fprintf( pFile, ".model %s\n", (char *)Vec_PtrEntry(vNtk, 0) );
     fprintf( pFile, ".inputs" );
-    Cba_PtrDumpSignalsBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 0 );
+    Bac_PtrDumpSignalsBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 0 );
     fprintf( pFile, "\n" );
     fprintf( pFile, ".outputs" );
-    Cba_PtrDumpSignalsBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 1 );
+    Bac_PtrDumpSignalsBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 1 );
     fprintf( pFile, "\n" );
     assert( Vec_PtrSize((Vec_Ptr_t *)Vec_PtrEntry(vNtk, 3)) == 0 ); // no nodes; only boxes
-    Cba_PtrDumpBoxesBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
+    Bac_PtrDumpBoxesBlif( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
     fprintf( pFile, ".end\n\n" );
 }
-void Cba_PtrDumpBlif( char * pFileName, Vec_Ptr_t * vDes )
+void Bac_PtrDumpBlif( char * pFileName, Vec_Ptr_t * vDes )
 {
     FILE * pFile;
     Vec_Ptr_t * vNtk; int i;
@@ -201,7 +201,7 @@ void Cba_PtrDumpBlif( char * pFileName, Vec_Ptr_t * vDes )
     }
     fprintf( pFile, "// Design \"%s\" written via Ptr in ABC on %s\n\n", (char *)Vec_PtrEntry(vDes, 0), Extra_TimeStamp() );
     Vec_PtrForEachEntryStart( Vec_Ptr_t *, vDes, vNtk, i, 1 )
-        Cba_PtrDumpModuleBlif( pFile, vNtk );
+        Bac_PtrDumpModuleBlif( pFile, vNtk );
     fclose( pFile );
 }
 
@@ -216,13 +216,13 @@ void Cba_PtrDumpBlif( char * pFileName, Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_PtrDumpSignalsVerilog( FILE * pFile, Vec_Ptr_t * vSigs, int fAlwaysComma )
+void Bac_PtrDumpSignalsVerilog( FILE * pFile, Vec_Ptr_t * vSigs, int fAlwaysComma )
 {
     char * pSig; int i;
     Vec_PtrForEachEntry( char *, vSigs, pSig, i )
         fprintf( pFile, " %s%s", pSig, (fAlwaysComma || i < Vec_PtrSize(vSigs) - 1) ? ",":"" );
 }
-void Cba_PtrDumpBoxVerilog( FILE * pFile, Vec_Ptr_t * vBox )
+void Bac_PtrDumpBoxVerilog( FILE * pFile, Vec_Ptr_t * vBox )
 {
     char * pName; int i;
     fprintf( pFile, "  %s", (char *)Vec_PtrEntry(vBox, 0) );
@@ -231,29 +231,29 @@ void Cba_PtrDumpBoxVerilog( FILE * pFile, Vec_Ptr_t * vBox )
         fprintf( pFile, ".%s(%s)%s", pName, (char *)Vec_PtrEntry(vBox, i+1), i < Vec_PtrSize(vBox) - 2 ? ", ":"" ), i++;
     fprintf( pFile, ");\n" );
 }
-void Cba_PtrDumpBoxesVerilog( FILE * pFile, Vec_Ptr_t * vBoxes )
+void Bac_PtrDumpBoxesVerilog( FILE * pFile, Vec_Ptr_t * vBoxes )
 {
     Vec_Ptr_t * vBox; int i;
     Vec_PtrForEachEntry( Vec_Ptr_t *, vBoxes, vBox, i )
-        Cba_PtrDumpBoxVerilog( pFile, vBox );
+        Bac_PtrDumpBoxVerilog( pFile, vBox );
 }
-void Cba_PtrDumpModuleVerilog( FILE * pFile, Vec_Ptr_t * vNtk )
+void Bac_PtrDumpModuleVerilog( FILE * pFile, Vec_Ptr_t * vNtk )
 {
     fprintf( pFile, "module %s (\n    ", (char *)Vec_PtrEntry(vNtk, 0) );
-    Cba_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 1 );
-    Cba_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 0 );
+    Bac_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 1 );
+    Bac_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 0 );
     fprintf( pFile, "\n  );\n" );
     fprintf( pFile, "  input" );
-    Cba_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 0 );
+    Bac_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1), 0 );
     fprintf( pFile, ";\n" );
     fprintf( pFile, "  output" );
-    Cba_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 0 );
+    Bac_PtrDumpSignalsVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 2), 0 );
     fprintf( pFile, ";\n" );
     assert( Vec_PtrSize((Vec_Ptr_t *)Vec_PtrEntry(vNtk, 3)) == 0 ); // no nodes; only boxes
-    Cba_PtrDumpBoxesVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
+    Bac_PtrDumpBoxesVerilog( pFile, (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4) );
     fprintf( pFile, "endmodule\n\n" );
 }
-void Cba_PtrDumpVerilog( char * pFileName, Vec_Ptr_t * vDes )
+void Bac_PtrDumpVerilog( char * pFileName, Vec_Ptr_t * vDes )
 {
     FILE * pFile;
     Vec_Ptr_t * vNtk; int i;
@@ -265,7 +265,7 @@ void Cba_PtrDumpVerilog( char * pFileName, Vec_Ptr_t * vDes )
     }
     fprintf( pFile, "// Design \"%s\" written via Ptr in ABC on %s\n\n", (char *)Vec_PtrEntry(vDes, 0), Extra_TimeStamp() );
     Vec_PtrForEachEntryStart( Vec_Ptr_t *, vDes, vNtk, i, 1 )
-        Cba_PtrDumpModuleVerilog( pFile, vNtk );
+        Bac_PtrDumpModuleVerilog( pFile, vNtk );
     fclose( pFile );
 }
 
@@ -281,13 +281,13 @@ void Cba_PtrDumpVerilog( char * pFileName, Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_ManCollectGateNameOne( Mio_Library_t * pLib, Ptr_ObjType_t Type, word Truth, Vec_Ptr_t * vGateNames )
+void Bac_ManCollectGateNameOne( Mio_Library_t * pLib, Ptr_ObjType_t Type, word Truth, Vec_Ptr_t * vGateNames )
 {
     Mio_Gate_t * pGate = Mio_LibraryReadGateByTruth( pLib, Truth );
     if ( pGate != NULL )
         Vec_PtrWriteEntry( vGateNames, Type, Mio_GateReadName(pGate) );
 }
-Vec_Ptr_t * Cba_ManCollectGateNamesByTruth( Mio_Library_t * pLib )
+Vec_Ptr_t * Bac_ManCollectGateNamesByTruth( Mio_Library_t * pLib )
 {
     static word uTruths6[3] = {
         ABC_CONST(0xAAAAAAAAAAAAAAAA),
@@ -295,16 +295,16 @@ Vec_Ptr_t * Cba_ManCollectGateNamesByTruth( Mio_Library_t * pLib )
         ABC_CONST(0xF0F0F0F0F0F0F0F0),
     };
     Vec_Ptr_t * vGateNames = Vec_PtrStart( PTR_GATE_UNKNOWN );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_C0,              0,                 vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_C1,       ~(word)0,                 vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_BUF,    uTruths6[0],                vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_INV,   ~uTruths6[0],                vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_AND,   (uTruths6[0] & uTruths6[1]), vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_NAND, ~(uTruths6[0] & uTruths6[1]), vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_OR,    (uTruths6[0] | uTruths6[1]), vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_NOR,  ~(uTruths6[0] | uTruths6[1]), vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_XOR,   (uTruths6[0] ^ uTruths6[1]), vGateNames );
-    Cba_ManCollectGateNameOne( pLib, PTR_GATE_XNOR, ~(uTruths6[0] ^ uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_C0,              0,                 vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_C1,       ~(word)0,                 vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_BUF,    uTruths6[0],                vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_INV,   ~uTruths6[0],                vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_AND,   (uTruths6[0] & uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_NAND, ~(uTruths6[0] & uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_OR,    (uTruths6[0] | uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_NOR,  ~(uTruths6[0] | uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_XOR,   (uTruths6[0] ^ uTruths6[1]), vGateNames );
+    Bac_ManCollectGateNameOne( pLib, PTR_GATE_XNOR, ~(uTruths6[0] ^ uTruths6[1]), vGateNames );
     return vGateNames;
 }
 
@@ -319,7 +319,7 @@ Vec_Ptr_t * Cba_ManCollectGateNamesByTruth( Mio_Library_t * pLib )
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_PtrUpdateBox( Vec_Ptr_t * vBox, Vec_Ptr_t * vGatesNames )
+void Bac_PtrUpdateBox( Vec_Ptr_t * vBox, Vec_Ptr_t * vGatesNames )
 {
     Mio_Gate_t * pGate;  Mio_Pin_t * pPin; int i = 1;
     Mio_Library_t * pLib = (Mio_Library_t *)Abc_FrameReadLibGen();
@@ -368,7 +368,7 @@ void Cba_PtrUpdateBox( Vec_Ptr_t * vBox, Vec_Ptr_t * vGatesNames )
     Vec_PtrWriteEntry( vBox, 2 * i++, Abc_UtilStrsav(pNameNew) );
     assert( 2 * i == Vec_PtrSize(vBox) );
 }
-Vec_Ptr_t * Cba_PtrTransformSigs( Vec_Ptr_t * vSig )
+Vec_Ptr_t * Bac_PtrTransformSigs( Vec_Ptr_t * vSig )
 {
     char * pName; int i;
     Vec_Ptr_t * vNew = Vec_PtrAllocExact( Vec_PtrSize(vSig) );
@@ -376,25 +376,25 @@ Vec_Ptr_t * Cba_PtrTransformSigs( Vec_Ptr_t * vSig )
         Vec_PtrPush( vNew, Abc_UtilStrsav(pName) );
     return vNew;
 }
-Vec_Ptr_t * Cba_PtrTransformBox( Vec_Ptr_t * vBox, Vec_Ptr_t * vGatesNames )
+Vec_Ptr_t * Bac_PtrTransformBox( Vec_Ptr_t * vBox, Vec_Ptr_t * vGatesNames )
 {
     char * pName; int i;
     Vec_Ptr_t * vNew = Vec_PtrAllocExact( Vec_PtrSize(vBox) );
     Vec_PtrForEachEntry( char *, vBox, pName, i )
         Vec_PtrPush( vNew, Abc_UtilStrsav(pName) );
     if ( vGatesNames )
-        Cba_PtrUpdateBox( vNew, vGatesNames );
+        Bac_PtrUpdateBox( vNew, vGatesNames );
     return vNew;
 }
-Vec_Ptr_t * Cba_PtrTransformBoxes( Vec_Ptr_t * vBoxes, Vec_Ptr_t * vGatesNames )
+Vec_Ptr_t * Bac_PtrTransformBoxes( Vec_Ptr_t * vBoxes, Vec_Ptr_t * vGatesNames )
 {
     Vec_Ptr_t * vBox; int i;
     Vec_Ptr_t * vNew = Vec_PtrAllocExact( Vec_PtrSize(vBoxes) );
     Vec_PtrForEachEntry( Vec_Ptr_t *, vBoxes, vBox, i )
-        Vec_PtrPush( vNew, Cba_PtrTransformBox(vBox, vGatesNames) );
+        Vec_PtrPush( vNew, Bac_PtrTransformBox(vBox, vGatesNames) );
     return vNew;
 }
-Vec_Ptr_t * Cba_PtrTransformNtk( Vec_Ptr_t * vNtk, Vec_Ptr_t * vGatesNames )
+Vec_Ptr_t * Bac_PtrTransformNtk( Vec_Ptr_t * vNtk, Vec_Ptr_t * vGatesNames )
 {
     char * pName = (char *)Vec_PtrEntry(vNtk, 0);
     Vec_Ptr_t * vInputs  = (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 1);
@@ -402,19 +402,19 @@ Vec_Ptr_t * Cba_PtrTransformNtk( Vec_Ptr_t * vNtk, Vec_Ptr_t * vGatesNames )
     Vec_Ptr_t * vBoxes   = (Vec_Ptr_t *)Vec_PtrEntry(vNtk, 4);
     Vec_Ptr_t * vNew     = Vec_PtrAllocExact( Vec_PtrSize(vNtk) );
     Vec_PtrPush( vNew, Abc_UtilStrsav(pName) );
-    Vec_PtrPush( vNew, Cba_PtrTransformSigs(vInputs) );
-    Vec_PtrPush( vNew, Cba_PtrTransformSigs(vOutputs) );
+    Vec_PtrPush( vNew, Bac_PtrTransformSigs(vInputs) );
+    Vec_PtrPush( vNew, Bac_PtrTransformSigs(vOutputs) );
     Vec_PtrPush( vNew, Vec_PtrAllocExact(0) );
-    Vec_PtrPush( vNew, Cba_PtrTransformBoxes(vBoxes, vGatesNames) );
+    Vec_PtrPush( vNew, Bac_PtrTransformBoxes(vBoxes, vGatesNames) );
     return vNew;
 }
-Vec_Ptr_t * Cba_PtrTransformTest( Vec_Ptr_t * vDes )
+Vec_Ptr_t * Bac_PtrTransformTest( Vec_Ptr_t * vDes )
 {
     Mio_Library_t * pLib;
     Vec_Ptr_t * vGatesNames;
     Vec_Ptr_t * vNtk, * vNew; int i;
     // dump BLIF before transformation
-    Cba_PtrDumpBlif( "test1.blif", vDes );
+    Bac_PtrDumpBlif( "test1.blif", vDes );
     if ( Abc_FrameGetGlobalFrame() == NULL )
     {
         printf( "ABC framework is not started.\n" );
@@ -426,14 +426,14 @@ Vec_Ptr_t * Cba_PtrTransformTest( Vec_Ptr_t * vDes )
         printf( "Standard cell library is not entered.\n" );
         return NULL;
     }
-    vGatesNames = Cba_ManCollectGateNamesByTruth( pLib );
+    vGatesNames = Bac_ManCollectGateNamesByTruth( pLib );
     // transform
     vNew = Vec_PtrAllocExact( Vec_PtrSize(vDes) );
     Vec_PtrPush( vNew, Abc_UtilStrsav((char *)Vec_PtrEntry(vDes, 0)) );
     Vec_PtrForEachEntryStart( Vec_Ptr_t *, vDes, vNtk, i, 1 )
-        Vec_PtrPush( vNew, Cba_PtrTransformNtk(vNtk, vGatesNames) );
+        Vec_PtrPush( vNew, Bac_PtrTransformNtk(vNtk, vGatesNames) );
     // dump BLIF after transformation
-    Cba_PtrDumpBlif( "test2.blif", vNew );
+    Bac_PtrDumpBlif( "test2.blif", vNew );
     Vec_PtrFree( vGatesNames );
     return vNew;
 }
@@ -449,15 +449,15 @@ Vec_Ptr_t * Cba_PtrTransformTest( Vec_Ptr_t * vDes )
   SeeAlso     []
 
 ***********************************************************************/
-void Cba_PtrTransformTestTest()
+void Bac_PtrTransformTestTest()
 {
     char * pFileName = "c/hie/dump/1/netlist_1.v";
     Abc_Ntk_t * pNtk = Io_ReadNetlist( pFileName, Io_ReadFileType(pFileName), 0 );
     extern Vec_Ptr_t * Ptr_AbcDeriveDes( Abc_Ntk_t * pNtk );
     Vec_Ptr_t * vDes = Ptr_AbcDeriveDes( pNtk );
-    Vec_Ptr_t * vNew = Cba_PtrTransformTest( vDes );
-    Cba_PtrFree( vDes );
-    Cba_PtrFree( vNew );
+    Vec_Ptr_t * vNew = Bac_PtrTransformTest( vDes );
+    Bac_PtrFree( vDes );
+    Bac_PtrFree( vNew );
 }
 
 
diff --git a/src/base/bac/bacReadBlif.c b/src/base/bac/bacReadBlif.c
new file mode 100644
index 00000000..4a1839b6
--- /dev/null
+++ b/src/base/bac/bacReadBlif.c
@@ -0,0 +1,453 @@
+/**CFile****************************************************************
+
+  FileName    [bacReadBlif.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [BLIF parser.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacReadBlif.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+// BLIF keywords
+typedef enum { 
+    PRS_BLIF_NONE = 0, // 0:   unused
+    PRS_BLIF_MODEL,    // 1:   .model
+    PRS_BLIF_INOUTS,   // 2:   .inouts
+    PRS_BLIF_INPUTS,   // 3:   .inputs
+    PRS_BLIF_OUTPUTS,  // 4:   .outputs
+    PRS_BLIF_NAMES,    // 5:   .names
+    PRS_BLIF_SUBCKT,   // 6:   .subckt
+    PRS_BLIF_GATE,     // 7:   .gate
+    PRS_BLIF_LATCH,    // 8:   .latch
+    PRS_BLIF_SHORT,    // 9:   .short
+    PRS_BLIF_END,      // 10:  .end
+    PRS_BLIF_UNKNOWN   // 11:  unknown
+} Bac_BlifType_t;
+
+static const char * s_BlifTypes[PRS_BLIF_UNKNOWN+1] = {
+    NULL,              // 0:   unused
+    ".model",          // 1:   .model   
+    ".inouts",         // 2:   .inputs
+    ".inputs",         // 3:   .inputs
+    ".outputs",        // 4:   .outputs
+    ".names",          // 5:   .names
+    ".subckt",         // 6:   .subckt
+    ".gate",           // 7:   .gate
+    ".latch",          // 8:   .latch
+    ".short",          // 9:   .short
+    ".end",            // 10:  .end
+    NULL               // 11:  unknown
+};
+
+static inline void Psr_NtkAddBlifDirectives( Psr_Man_t * p )
+{
+    int i;
+    for ( i = 1; s_BlifTypes[i]; i++ )
+        Abc_NamStrFindOrAdd( p->pStrs, (char *)s_BlifTypes[i], NULL );
+    assert( Abc_NamObjNumMax(p->pStrs) == i );
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Reading characters.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int  Psr_CharIsSpace( char c )                { return c == ' ' || c == '\t' || c == '\r';              }
+static inline int  Psr_CharIsStop( char c )                 { return c == '#' || c == '\\' || c == '\n' || c == '=';  }
+static inline int  Psr_CharIsLit( char c )                  { return c == '0' || c == '1'  || c == '-';               }
+
+static inline int  Psr_ManIsSpace( Psr_Man_t * p )          { return Psr_CharIsSpace(*p->pCur);                       }
+static inline int  Psr_ManIsStop( Psr_Man_t * p )           { return Psr_CharIsStop(*p->pCur);                        }
+static inline int  Psr_ManIsLit( Psr_Man_t * p )            { return Psr_CharIsLit(*p->pCur);                         }
+
+static inline int  Psr_ManIsChar( Psr_Man_t * p, char c )   { return *p->pCur == c;                                   }
+static inline int  Psr_ManIsChar2( Psr_Man_t * p, char c )  { return *p->pCur++ == c;                                 }
+
+static inline void Psr_ManSkip( Psr_Man_t * p )             { p->pCur++;                                              }
+static inline char Psr_ManSkip2( Psr_Man_t * p )            { return *p->pCur++;                                      }
+
+
+/**Function*************************************************************
+
+  Synopsis    [Reading names.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline void Psr_ManSkipToChar( Psr_Man_t * p, char c )  
+{ 
+    while ( !Psr_ManIsChar(p, c) ) 
+        Psr_ManSkip(p);
+}
+static inline void Psr_ManSkipSpaces( Psr_Man_t * p )
+{
+    while ( 1 )
+    {
+        while ( Psr_ManIsSpace(p) )
+            Psr_ManSkip(p);
+        if ( Psr_ManIsChar(p, '\\') )
+        {
+            Psr_ManSkipToChar( p, '\n' );
+            Psr_ManSkip(p);
+            continue;
+        }
+        if ( Psr_ManIsChar(p, '#') )  
+            Psr_ManSkipToChar( p, '\n' );
+        break;
+    }
+    assert( !Psr_ManIsSpace(p) );
+}
+static inline int Psr_ManReadName( Psr_Man_t * p )
+{
+    char * pStart;
+    Psr_ManSkipSpaces( p );
+    if ( Psr_ManIsChar(p, '\n') )
+        return 0;
+    pStart = p->pCur;
+    while ( !Psr_ManIsSpace(p) && !Psr_ManIsStop(p) )
+        Psr_ManSkip(p);
+    if ( pStart == p->pCur )
+        return 0;
+    return Abc_NamStrFindOrAddLim( p->pStrs, pStart, p->pCur, NULL );
+}
+static inline int Psr_ManReadList( Psr_Man_t * p, Vec_Int_t * vOrder, int Type )
+{
+    int iToken;
+    Vec_IntClear( &p->vTemp );
+    while ( (iToken = Psr_ManReadName(p)) )
+    {
+        Vec_IntPush( &p->vTemp, iToken );
+        Vec_IntPush( vOrder, Abc_Var2Lit2(iToken, Type) );
+    }
+    if ( Vec_IntSize(&p->vTemp) == 0 )                return Psr_ManErrorSet(p, "Signal list is empty.", 1);
+    return 0;
+}
+static inline int Psr_ManReadList2( Psr_Man_t * p )
+{
+    int iToken;
+    Vec_IntClear( &p->vTemp );
+    while ( (iToken = Psr_ManReadName(p)) )
+        Vec_IntPushTwo( &p->vTemp, 0, iToken );
+    if ( Vec_IntSize(&p->vTemp) == 0 )                return Psr_ManErrorSet(p, "Signal list is empty.", 1);
+    return 0;
+}
+static inline int Psr_ManReadList3( Psr_Man_t * p )
+{
+    Vec_IntClear( &p->vTemp );
+    while ( !Psr_ManIsChar(p, '\n') )
+    {
+        int iToken = Psr_ManReadName(p);
+        if ( iToken == 0 )              return Psr_ManErrorSet(p, "Cannot read formal name.", 1);
+        Vec_IntPush( &p->vTemp, iToken );
+        Psr_ManSkipSpaces( p );
+        if ( !Psr_ManIsChar2(p, '=') )  return Psr_ManErrorSet(p, "Cannot find symbol \"=\".", 1);
+        iToken = Psr_ManReadName(p);
+        if ( iToken == 0 )              return Psr_ManErrorSet(p, "Cannot read actual name.", 1);
+        Vec_IntPush( &p->vTemp, iToken );
+        Psr_ManSkipSpaces( p );
+    }
+    if ( Vec_IntSize(&p->vTemp) == 0 )  return Psr_ManErrorSet(p, "Cannot read a list of formal/actual names.", 1);
+    if ( Vec_IntSize(&p->vTemp) % 2  )  return Psr_ManErrorSet(p, "The number of formal/actual names is not even.", 1);
+    return 0;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Psr_ManReadCube( Psr_Man_t * p )
+{
+    assert( Psr_ManIsLit(p) );
+    while ( Psr_ManIsLit(p) )
+        Vec_StrPush( &p->vCover, Psr_ManSkip2(p) );
+    Psr_ManSkipSpaces( p );
+    if ( Psr_ManIsChar(p, '\n') )
+    {
+        if ( Vec_StrSize(&p->vCover) != 1 )           return Psr_ManErrorSet(p, "Cannot read cube.", 1);
+        // fix single literal cube by adding space
+        Vec_StrPush( &p->vCover, Vec_StrEntry(&p->vCover,0) );
+        Vec_StrWriteEntry( &p->vCover, 0, ' ' );
+        Vec_StrPush( &p->vCover, '\n' );
+        return 0;
+    }
+    if ( !Psr_ManIsLit(p) )                           return Psr_ManErrorSet(p, "Cannot read output literal.", 1);
+    Vec_StrPush( &p->vCover, ' ' );
+    Vec_StrPush( &p->vCover, Psr_ManSkip2(p) );
+    Vec_StrPush( &p->vCover, '\n' );
+    Psr_ManSkipSpaces( p );
+    if ( !Psr_ManIsChar(p, '\n') )                    return Psr_ManErrorSet(p, "Cannot read end of cube.", 1);
+    return 0;
+}
+static inline void Psr_ManSaveCover( Psr_Man_t * p )
+{
+    int iToken;
+    if ( Vec_StrSize(&p->vCover) == 0 )
+        p->pNtk->fHasC0s = 1;
+    else if ( Vec_StrSize(&p->vCover) == 2 )
+    {
+        if ( Vec_StrEntryLast(&p->vCover) == '0' )
+            p->pNtk->fHasC0s = 1;
+        else if ( Vec_StrEntryLast(&p->vCover) == '1' )
+            p->pNtk->fHasC1s = 1;
+        else assert( 0 );
+    }
+    assert( Vec_StrSize(&p->vCover) > 0 );
+    Vec_StrPush( &p->vCover, '\0' );
+    //iToken = Abc_NamStrFindOrAdd( p->pStrs, Vec_StrArray(&p->vCover), NULL );
+    iToken = Ptr_SopToType( Vec_StrArray(&p->vCover) );
+    Vec_StrClear( &p->vCover );
+    // set the cover to the module of this box
+    assert( Psr_BoxNtk(p->pNtk, Psr_NtkBoxNum(p->pNtk)-1) == 1 ); // default const 0
+    Psr_BoxSetNtk( p->pNtk, Psr_NtkBoxNum(p->pNtk)-1, iToken );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Psr_ManReadInouts( Psr_Man_t * p )
+{
+    if ( Psr_ManReadList(p, &p->pNtk->vOrder, 3) )    return 1;
+    Vec_IntAppend( &p->pNtk->vInouts, &p->vTemp );
+    return 0;
+}
+static inline int Psr_ManReadInputs( Psr_Man_t * p )
+{
+    if ( Psr_ManReadList(p, &p->pNtk->vOrder, 1) )    return 1;
+    Vec_IntAppend( &p->pNtk->vInputs, &p->vTemp );
+    return 0;
+}
+static inline int Psr_ManReadOutputs( Psr_Man_t * p )
+{
+    if ( Psr_ManReadList(p, &p->pNtk->vOrder, 2) )    return 1;
+    Vec_IntAppend( &p->pNtk->vOutputs, &p->vTemp );
+    return 0;
+}
+static inline int Psr_ManReadNode( Psr_Man_t * p )
+{
+    if ( Psr_ManReadList2(p) )   return 1;
+    // save results
+    Psr_NtkAddBox( p->pNtk, 1, 0, &p->vTemp ); // default const 0 function
+    return 0;
+}
+static inline int Psr_ManReadBox( Psr_Man_t * p, int fGate )
+{
+    int iToken = Psr_ManReadName(p);
+    if ( iToken == 0 )           return Psr_ManErrorSet(p, "Cannot read model name.", 1);
+    if ( Psr_ManReadList3(p) )   return 1;
+    // save results
+    Psr_NtkAddBox( p->pNtk, iToken, 0, &p->vTemp );
+    if ( fGate ) p->pNtk->fMapped = 1;
+    return 0;
+}
+static inline int Psr_ManReadLatch( Psr_Man_t * p )
+{
+    int iToken = Psr_ManReadName(p);
+    Vec_IntClear( &p->vTemp );
+    if ( iToken == 0 )                 return Psr_ManErrorSet(p, "Cannot read latch input.", 1);
+    Vec_IntWriteEntry( &p->vTemp, 1, iToken );
+    iToken = Psr_ManReadName(p);
+    if ( iToken == 0 )                 return Psr_ManErrorSet(p, "Cannot read latch output.", 1);
+    Vec_IntWriteEntry( &p->vTemp, 0, iToken );
+    Psr_ManSkipSpaces( p );
+    if ( Psr_ManIsChar(p, '0') )
+        iToken = 0;
+    else if ( Psr_ManIsChar(p, '1') )
+        iToken = 1;
+    else 
+        iToken = 2;
+    Psr_ManSkipToChar( p, '\n' );
+    // save results
+    Psr_NtkAddBox( p->pNtk, -1, iToken, &p->vTemp ); // -1 stands for latch
+    return 0;
+}
+static inline int Psr_ManReadShort( Psr_Man_t * p )
+{
+    int iToken = Psr_ManReadName(p);
+    Vec_IntClear( &p->vTemp );
+    if ( iToken == 0 )                 return Psr_ManErrorSet(p, "Cannot read .short input.", 1);
+    Vec_IntWriteEntry( &p->vTemp, 1, iToken );
+    iToken = Psr_ManReadName(p);
+    if ( iToken == 0 )                 return Psr_ManErrorSet(p, "Cannot read .short output.", 1);
+    Vec_IntWriteEntry( &p->vTemp, 0, iToken );
+    Psr_ManSkipSpaces( p );
+    if ( !Psr_ManIsChar(p, '\n') )     return Psr_ManErrorSet(p, "Trailing symbols on .short line.", 1);
+    // save results
+    iToken = Abc_NamStrFindOrAdd( p->pStrs, "1 1\n", NULL );
+    Psr_NtkAddBox( p->pNtk, iToken, 0, &p->vTemp );
+    return 0;
+}
+static inline int Psr_ManReadModel( Psr_Man_t * p )
+{
+    int iToken;
+    if ( p->pNtk != NULL )                         return Psr_ManErrorSet(p, "Parsing previous model is unfinished.", 1);
+    iToken = Psr_ManReadName(p);
+    if ( iToken == 0 )                             return Psr_ManErrorSet(p, "Cannot read model name.", 1);
+    Psr_ManInitializeNtk( p, iToken, 0 );
+    Psr_ManSkipSpaces( p );
+    if ( !Psr_ManIsChar(p, '\n') )                 return Psr_ManErrorSet(p, "Trailing symbols on .model line.", 1);
+    return 0;
+}
+static inline int Psr_ManReadEnd( Psr_Man_t * p )
+{
+    if ( p->pNtk == 0 )                            return Psr_ManErrorSet(p, "Directive .end without .model.", 1);
+    //printf( "Saving model \"%s\".\n", Abc_NamStr(p->pStrs, p->iModuleName) );
+    Psr_ManFinalizeNtk( p );
+    Psr_ManSkipSpaces( p );
+    if ( !Psr_ManIsChar(p, '\n') )                 return Psr_ManErrorSet(p, "Trailing symbols on .end line.", 1);
+    return 0;
+}
+
+static inline int Psr_ManReadDirective( Psr_Man_t * p )
+{
+    int iToken;
+    if ( !Psr_ManIsChar(p, '.') )
+        return Psr_ManReadCube( p );
+    if ( Vec_StrSize(&p->vCover) > 0 ) // SOP was specified for the previous node
+        Psr_ManSaveCover( p );
+    iToken = Psr_ManReadName( p );  
+    if ( iToken == PRS_BLIF_MODEL )
+        return Psr_ManReadModel( p );
+    if ( iToken == PRS_BLIF_INOUTS )
+        return Psr_ManReadInouts( p );
+    if ( iToken == PRS_BLIF_INPUTS )
+        return Psr_ManReadInputs( p );
+    if ( iToken == PRS_BLIF_OUTPUTS )
+        return Psr_ManReadOutputs( p );
+    if ( iToken == PRS_BLIF_NAMES )
+        return Psr_ManReadNode( p );
+    if ( iToken == PRS_BLIF_SUBCKT )
+        return Psr_ManReadBox( p, 0 );
+    if ( iToken == PRS_BLIF_GATE )
+        return Psr_ManReadBox( p, 1 );
+    if ( iToken == PRS_BLIF_LATCH )
+        return Psr_ManReadLatch( p );
+    if ( iToken == PRS_BLIF_SHORT )
+        return Psr_ManReadShort( p );
+    if ( iToken == PRS_BLIF_END )
+        return Psr_ManReadEnd( p );
+    printf( "Cannot read directive \"%s\".\n", Abc_NamStr(p->pStrs, iToken) );
+    return 1;
+}
+static inline int Psr_ManReadLines( Psr_Man_t * p )
+{
+    while ( p->pCur[1] != '\0' )
+    {
+        assert( Psr_ManIsChar(p, '\n') );
+        Psr_ManSkip(p);
+        Psr_ManSkipSpaces( p );
+        if ( Psr_ManIsChar(p, '\n') )
+            continue;
+        if ( Psr_ManReadDirective(p) )   
+            return 1;
+    }
+    return 0;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Ptr_t * Psr_ManReadBlif( char * pFileName )
+{
+    Vec_Ptr_t * vPrs = NULL;
+    Psr_Man_t * p = Psr_ManAlloc( pFileName );
+    if ( p == NULL )
+        return NULL;
+    Psr_NtkAddBlifDirectives( p );
+    Psr_ManReadLines( p );
+    if ( Psr_ManErrorPrint(p) )
+        ABC_SWAP( Vec_Ptr_t *, vPrs, p->vNtks );
+    Psr_ManFree( p );
+    return vPrs;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Psr_ManReadBlifTest()
+{
+    abctime clk = Abc_Clock();
+    extern void Psr_ManWriteBlif( char * pFileName, Vec_Ptr_t * vPrs );
+//    Vec_Ptr_t * vPrs = Psr_ManReadBlif( "aga/ray/ray_hie_oper.blif" );
+    Vec_Ptr_t * vPrs = Psr_ManReadBlif( "c/hie/dump/1/netlist_1_out8.blif" );
+    if ( !vPrs ) return;
+    printf( "Finished reading %d networks. ", Vec_PtrSize(vPrs) );
+    printf( "NameIDs = %d. ", Abc_NamObjNumMax(Psr_ManNameMan(vPrs)) );
+    printf( "Memory = %.2f MB. ", 1.0*Psr_ManMemory(vPrs)/(1<<20) );
+    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
+//    Abc_NamPrint( p->pStrs );
+    Psr_ManWriteBlif( "c/hie/dump/1/netlist_1_out8_out.blif", vPrs );
+    Psr_ManVecFree( vPrs );
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/cba/cbaReadSmt.c b/src/base/bac/bacReadSmt.c
index a9dd83dd..56fdaaea 100644
--- a/src/base/cba/cbaReadSmt.c
+++ b/src/base/bac/bacReadSmt.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaReadSmt.c]
+  FileName    [bacReadSmt.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,11 +14,11 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaReadSmt.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacReadSmt.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
+#include "bac.h"
 
 ABC_NAMESPACE_IMPL_START
 
diff --git a/src/base/bac/bacReadVec.c b/src/base/bac/bacReadVec.c
new file mode 100644
index 00000000..676b090d
--- /dev/null
+++ b/src/base/bac/bacReadVec.c
@@ -0,0 +1,875 @@
+/**CFile****************************************************************
+
+  FileName    [bacReadVer.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [BLIF writer.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacReadVer.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+// Verilog keywords
+typedef enum { 
+    PRS_VER_NONE = 0,  // 0:  unused
+    PRS_VER_INPUT,     // 1:  input
+    PRS_VER_OUTPUT,    // 2:  output
+    PRS_VER_INOUT,     // 3:  inout
+    PRS_VER_WIRE,      // 4:  wire
+    PRS_VER_MODULE,    // 5:  module
+    PRS_VER_ASSIGN,    // 6:  assign
+    PRS_VER_REG,       // 7:  reg
+    PRS_VER_ALWAYS,    // 8:  always
+    PRS_VER_DEFPARAM,  // 9:  always
+    PRS_VER_BEGIN,     // 10: begin
+    PRS_VER_END,       // 11: end
+    PRS_VER_ENDMODULE, // 12: endmodule
+    PRS_VER_UNKNOWN    // 13: unknown
+} Bac_VerType_t;
+
+static const char * s_VerTypes[PRS_VER_UNKNOWN+1] = {
+    NULL,              // 0:  unused
+    "input",           // 1:  input
+    "output",          // 2:  output
+    "inout",           // 3:  inout
+    "wire",            // 4:  wire
+    "module",          // 5:  module
+    "assign",          // 6:  assign
+    "reg",             // 7:  reg
+    "always",          // 8:  always
+    "defparam",        // 9:  defparam
+    "begin",           // 10: begin
+    "end",             // 11: end
+    "endmodule",       // 12: endmodule
+    NULL               // 13: unknown 
+};
+
+static inline void Psr_NtkAddVerilogDirectives( Psr_Man_t * p )
+{
+    int i;
+    for ( i = 1; s_VerTypes[i]; i++ )
+        Abc_NamStrFindOrAdd( p->pStrs, (char *)s_VerTypes[i],   NULL );
+    assert( Abc_NamObjNumMax(p->pStrs) == i );
+}
+
+
+// character recognition 
+static inline int Psr_CharIsSpace( char c )   { return (c == ' ' || c == '\t' || c == '\r' || c == '\n');                           }
+static inline int Psr_CharIsDigit( char c )   { return (c >= '0' && c <= '9');                                                      }
+static inline int Psr_CharIsDigitB( char c )  { return (c == '0' || c == '1'  || c == 'x' || c == 'z');                             }
+static inline int Psr_CharIsDigitH( char c )  { return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f');  }
+static inline int Psr_CharIsChar( char c )    { return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');                            }
+static inline int Psr_CharIsSymb1( char c )   { return Psr_CharIsChar(c) || c == '_';                                               }
+static inline int Psr_CharIsSymb2( char c )   { return Psr_CharIsSymb1(c) || Psr_CharIsDigit(c) || c == '$';                        }
+
+static inline int Psr_ManIsChar( Psr_Man_t * p, char c )    { return p->pCur[0] == c;                        }
+static inline int Psr_ManIsChar1( Psr_Man_t * p, char c )   { return p->pCur[1] == c;                        }
+static inline int Psr_ManIsDigit( Psr_Man_t * p )           { return Psr_CharIsDigit(*p->pCur);              }
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+
+// collect predefined modules names
+static const char * s_VerilogModules[100] = 
+{
+    "const0", // BAC_BOX_CF,  
+    "const1", // BAC_BOX_CT,  
+    "constX", // BAC_BOX_CX,  
+    "constZ", // BAC_BOX_CZ,  
+    "buf",    // BAC_BOX_BUF,  
+    "not",    // BAC_BOX_INV,  
+    "and",    // BAC_BOX_AND,  
+    "nand",   // BAC_BOX_NAND, 
+    "or",     // BAC_BOX_OR,   
+    "nor",    // BAC_BOX_NOR,  
+    "xor",    // BAC_BOX_XOR,  
+    "xnor",   // BAC_BOX_XNOR, 
+    "sharp",  // BAC_BOX_SHARP,
+    "mux",    // BAC_BOX_MUX,  
+    "maj",    // BAC_BOX_MAJ,  
+    NULL
+};
+static const char * s_KnownModules[100] = 
+{
+    "VERIFIC_",
+    "add_",                  
+    "mult_",                 
+    "div_",                  
+    "mod_",                  
+    "rem_",                  
+    "shift_left_",           
+    "shift_right_",          
+    "rotate_left_",          
+    "rotate_right_",         
+    "reduce_and_",           
+    "reduce_or_",            
+    "reduce_xor_",           
+    "reduce_nand_",          
+    "reduce_nor_",           
+    "reduce_xnor_",          
+    "LessThan_",             
+    "Mux_",                  
+    "Select_",               
+    "Decoder_",              
+    "EnabledDecoder_",       
+    "PrioSelect_",           
+    "DualPortRam_",          
+    "ReadPort_",             
+    "WritePort_",            
+    "ClockedWritePort_",     
+    "lut",                   
+    "and_",                  
+    "or_",                   
+    "xor_",                  
+    "nand_",                 
+    "nor_",                  
+    "xnor_",                 
+    "buf_",                  
+    "inv_",                  
+    "tri_",                  
+    "sub_",                  
+    "unary_minus_",          
+    "equal_",                
+    "not_equal_",            
+    "mux_",                  
+    "wide_mux_",             
+    "wide_select_",          
+    "wide_dff_",             
+    "wide_dlatch_",          
+    "wide_dffrs_",           
+    "wide_dlatchrs_",        
+    "wide_prio_select_",     
+    "pow_",                  
+    "PrioEncoder_",          
+    "abs",                   
+    NULL
+};
+
+// check if it is a Verilog predefined module
+static inline int Psr_ManIsVerilogModule( Psr_Man_t * p, char * pName )
+{
+    int i;
+    for ( i = 0; s_VerilogModules[i]; i++ )
+        if ( !strcmp(pName, s_VerilogModules[i]) )
+            return BAC_BOX_CF + i;
+    return 0;
+}
+// check if it is a known module
+static inline int Psr_ManIsKnownModule( Psr_Man_t * p, char * pName )
+{
+    int i;
+    for ( i = 0; s_KnownModules[i]; i++ )
+        if ( !strncmp(pName, s_KnownModules[i], strlen(s_KnownModules[i])) )
+            return i;
+    return 0;
+}
+
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+
+// skips Verilog comments (returns 1 if some comments were skipped)
+static inline int Psr_ManUtilSkipComments( Psr_Man_t * p )
+{
+    if ( !Psr_ManIsChar(p, '/') )
+        return 0;
+    if ( Psr_ManIsChar1(p, '/') )
+    {
+        for ( p->pCur += 2; p->pCur < p->pLimit; p->pCur++ )
+            if ( Psr_ManIsChar(p, '\n') )
+                { p->pCur++; return 1; }
+    }
+    else if ( Psr_ManIsChar1(p, '*') )
+    {
+        for ( p->pCur += 2; p->pCur < p->pLimit; p->pCur++ )
+            if ( Psr_ManIsChar(p, '*') && Psr_ManIsChar1(p, '/') )
+                { p->pCur++; p->pCur++; return 1; }
+    }
+    return 0;
+}
+static inline int Psr_ManUtilSkipName( Psr_Man_t * p )
+{
+    if ( !Psr_ManIsChar(p, '\\') )
+        return 0;
+    for ( p->pCur++; p->pCur < p->pLimit; p->pCur++ )
+        if ( Psr_ManIsChar(p, ' ') )
+            { p->pCur++; return 1; }
+    return 0;
+}
+
+// skip any number of spaces and comments
+static inline int Psr_ManUtilSkipSpaces( Psr_Man_t * p )
+{
+    while ( p->pCur < p->pLimit )
+    {
+        while ( Psr_CharIsSpace(*p->pCur) ) 
+            p->pCur++;
+        if ( !*p->pCur )
+            return Psr_ManErrorSet(p, "Unexpectedly reached end-of-file.", 1);
+        if ( !Psr_ManUtilSkipComments(p) )
+            return 0;
+    }
+    return Psr_ManErrorSet(p, "Unexpectedly reached end-of-file.", 1);
+}
+// skip everything including comments until the given char
+static inline int Psr_ManUtilSkipUntil( Psr_Man_t * p, char c )
+{
+    while ( p->pCur < p->pLimit )
+    {
+        if ( Psr_ManIsChar(p, c) )
+            return 1;
+        if ( Psr_ManUtilSkipComments(p) )
+            continue;
+        if ( Psr_ManUtilSkipName(p) )
+            continue;
+        p->pCur++;
+    }
+    return 0;
+}
+// skip everything including comments until the given word
+static inline int Psr_ManUtilSkipUntilWord( Psr_Man_t * p, char * pWord )
+{
+    char * pPlace = strstr( p->pCur, pWord );
+    if ( pPlace == NULL )  return 1;
+    p->pCur = pPlace + strlen(pWord);
+    return 0;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Psr_ManReadName( Psr_Man_t * p )
+{
+    char * pStart = p->pCur;
+    if ( Psr_ManIsChar(p, '\\') ) // escaped name
+    {
+        pStart = ++p->pCur;
+        while ( !Psr_ManIsChar(p, ' ') ) 
+            p->pCur++;
+    }    
+    else if ( Psr_CharIsSymb1(*p->pCur) ) // simple name
+    {
+        p->pCur++;
+        while ( Psr_CharIsSymb2(*p->pCur) ) 
+            p->pCur++;
+    }
+    else 
+        return 0;
+    return Abc_NamStrFindOrAddLim( p->pStrs, pStart, p->pCur, NULL );
+}
+static inline int Psr_ManReadNameList( Psr_Man_t * p, Vec_Int_t * vTemp, char LastSymb )
+{
+    Vec_IntClear( vTemp );
+    while ( 1 )
+    {
+        int Item = Psr_ManReadName(p);
+        if ( Item == 0 )                    return Psr_ManErrorSet(p, "Cannot read name in the list.", 0);
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 1.", 0);
+        if ( Item == PRS_VER_WIRE  )
+            continue;
+        Vec_IntPush( vTemp, Item );
+        if ( Psr_ManIsChar(p, LastSymb) )   break;
+        if ( !Psr_ManIsChar(p, ',') )       return Psr_ManErrorSet(p, "Expecting comma in the list.", 0);
+        p->pCur++;
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 2.", 0);
+    }
+    return 1;
+}
+static inline int Psr_ManReadConstant( Psr_Man_t * p )
+{
+    char * pStart = p->pCur;
+    assert( Psr_ManIsDigit(p) );
+    while ( Psr_ManIsDigit(p) ) 
+        p->pCur++;
+    if ( !Psr_ManIsChar(p, '\'') )          return Psr_ManErrorSet(p, "Cannot read constant.", 0);
+    p->pCur++;
+    if ( Psr_ManIsChar(p, 'b') )
+    {
+        p->pCur++;
+        while ( Psr_CharIsDigitB(*p->pCur) ) 
+        {
+            if ( *p->pCur == '0' )
+                p->pNtk->fHasC0s = 1;
+            else if ( *p->pCur == '1' )
+                p->pNtk->fHasC1s = 1;
+            else if ( *p->pCur == 'x' )
+                p->pNtk->fHasCXs = 1;
+            else if ( *p->pCur == 'z' )
+                p->pNtk->fHasCZs = 1;
+            p->pCur++;
+        }
+    }
+    else if ( Psr_ManIsChar(p, 'h') )
+    {
+        p->pCur++;
+        p->pNtk->fHasC0s = 1;
+        while ( Psr_CharIsDigitH(*p->pCur) ) 
+        {
+            if ( *p->pCur != '0' )
+                p->pNtk->fHasC1s = 1;
+            p->pCur++;
+        }
+    }
+    else if ( Psr_ManIsChar(p, 'd') )
+    {
+        p->pCur++;
+        p->pNtk->fHasC0s = 1;
+        while ( Psr_ManIsDigit(p) ) 
+        {
+            if ( *p->pCur != '0' )
+                p->pNtk->fHasC1s = 1;
+            p->pCur++;
+        }
+    }
+    else                                    return Psr_ManErrorSet(p, "Cannot read radix of constant.", 0);
+    return Abc_NamStrFindOrAddLim( p->pStrs, pStart, p->pCur, NULL );
+}
+static inline int Psr_ManReadRange( Psr_Man_t * p )
+{
+    assert( Psr_ManIsChar(p, '[') );
+    Vec_StrClear( &p->vCover );
+    Vec_StrPush( &p->vCover, *p->pCur++ );
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 3.", 0);
+    if ( !Psr_ManIsDigit(p) )               return Psr_ManErrorSet(p, "Cannot read digit in range specification.", 0);
+    while ( Psr_ManIsDigit(p) )
+        Vec_StrPush( &p->vCover, *p->pCur++ );
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 4.", 0);
+    if ( Psr_ManIsChar(p, ':') )
+    {
+        Vec_StrPush( &p->vCover, *p->pCur++ );
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 5.", 0);
+        if ( !Psr_ManIsDigit(p) )           return Psr_ManErrorSet(p, "Cannot read digit in range specification.", 0);
+        while ( Psr_ManIsDigit(p) )
+            Vec_StrPush( &p->vCover, *p->pCur++ );
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 6.", 0);
+    }
+    if ( !Psr_ManIsChar(p, ']') )           return Psr_ManErrorSet(p, "Cannot read closing brace in range specification.", 0);
+    Vec_StrPush( &p->vCover, *p->pCur++ );
+    Vec_StrPush( &p->vCover, '\0' );
+    return Abc_NamStrFindOrAdd( p->pStrs, Vec_StrArray(&p->vCover), NULL );
+}
+static inline int Psr_ManReadConcat( Psr_Man_t * p, Vec_Int_t * vTemp2 )
+{
+    extern int Psr_ManReadSignalList( Psr_Man_t * p, Vec_Int_t * vTemp, char LastSymb, int fAddForm );
+    assert( Psr_ManIsChar(p, '{') );
+    p->pCur++;
+    if ( !Psr_ManReadSignalList( p, vTemp2, '}', 0 ) ) return Psr_ManErrorSet(p, "Error number 7.", 0);
+    // check final
+    assert( Psr_ManIsChar(p, '}') );
+    p->pCur++;
+    // return special case
+    assert( Vec_IntSize(vTemp2) > 0 );
+    if ( Vec_IntSize(vTemp2) == 1 )
+        return Vec_IntEntry(vTemp2, 0);
+    return Abc_Var2Lit2( Psr_NtkAddConcat(p->pNtk, vTemp2), BAC_PRS_CONCAT );
+}
+static inline int Psr_ManReadSignal( Psr_Man_t * p )
+{
+    int Item;
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 8.", 0);
+    if ( Psr_ManIsDigit(p) )
+    {
+        Item = Psr_ManReadConstant(p);
+        if ( Item == 0 )                    return Psr_ManErrorSet(p, "Error number 9.", 0);
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 10.", 0);
+        return Abc_Var2Lit2( Item, BAC_PRS_CONST );
+    }
+    if ( Psr_ManIsChar(p, '{') )
+    {
+        if ( p->fUsingTemp2 )               return Psr_ManErrorSet(p, "Cannot read nested concatenations.", 0);
+        p->fUsingTemp2 = 1;
+        Item = Psr_ManReadConcat(p, &p->vTemp2);
+        p->fUsingTemp2 = 0;
+        if ( Item == 0 )                    return Psr_ManErrorSet(p, "Error number 11.", 0);
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 12.", 0);
+        return Item;
+    }
+    else
+    {
+        Item = Psr_ManReadName( p );
+        if ( Item == 0 )                    return Psr_ManErrorSet(p, "Error number 13.", 0);    // was        return 1;                
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 14.", 0);
+        if ( Psr_ManIsChar(p, '[') )
+        {
+            int Range = Psr_ManReadRange(p);
+            if ( Range == 0 )               return Psr_ManErrorSet(p, "Error number 15.", 0);
+            if ( Psr_ManUtilSkipSpaces(p) ) return Psr_ManErrorSet(p, "Error number 16.", 0);
+            return Abc_Var2Lit2( Psr_NtkAddSlice(p->pNtk, Item, Range), BAC_PRS_SLICE );
+        }
+        return Abc_Var2Lit2( Item, BAC_PRS_NAME );
+    }
+}
+static int Psr_ManReadSignalList( Psr_Man_t * p, Vec_Int_t * vTemp, char LastSymb, int fAddForm )
+{
+    Vec_IntClear( vTemp );
+    while ( 1 )
+    {
+        int Item = Psr_ManReadSignal(p);
+        if ( Item == 0 )                    return Psr_ManErrorSet(p, "Cannot read signal in the list.", 0);
+        if ( fAddForm )
+            Vec_IntPush( vTemp, 0 );
+        Vec_IntPush( vTemp, Item );
+        if ( Psr_ManIsChar(p, LastSymb) )   break;
+        if ( !Psr_ManIsChar(p, ',') )       return Psr_ManErrorSet(p, "Expecting comma in the list.", 0);
+        p->pCur++;
+    }
+    return 1;
+}
+static inline int Psr_ManReadSignalList2( Psr_Man_t * p, Vec_Int_t * vTemp )
+{
+    int FormId, ActItem;
+    Vec_IntClear( vTemp );
+    assert( Psr_ManIsChar(p, '.') );
+    while ( Psr_ManIsChar(p, '.') )
+    {
+        p->pCur++;
+        FormId = Psr_ManReadName( p );
+        if ( FormId == 0 )                  return Psr_ManErrorSet(p, "Cannot read formal name of the instance.", 0);
+        if ( !Psr_ManIsChar(p, '(') )       return Psr_ManErrorSet(p, "Cannot read \"(\" in the instance.", 0);
+        p->pCur++;
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 17.", 0);
+        ActItem = Psr_ManReadSignal( p );
+        if ( ActItem == 0 )                 return Psr_ManErrorSet(p, "Cannot read actual name of the instance.", 0);
+        if ( !Psr_ManIsChar(p, ')') )       return Psr_ManErrorSet(p, "Cannot read \")\" in the instance.", 0);
+        p->pCur++;
+        Vec_IntPushTwo( vTemp, FormId, ActItem );
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 18.", 0);
+        if ( Psr_ManIsChar(p, ')') )        break;
+        if ( !Psr_ManIsChar(p, ',') )       return Psr_ManErrorSet(p, "Expecting comma in the instance.", 0);
+        p->pCur++;
+        if ( Psr_ManUtilSkipSpaces(p) )     return Psr_ManErrorSet(p, "Error number 19.", 0);
+    }
+    assert( Vec_IntSize(vTemp) > 0 );
+    assert( Vec_IntSize(vTemp) % 2 == 0 );
+    return 1;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static inline int Psr_ManReadDeclaration( Psr_Man_t * p, int Type )
+{
+    int i, NameId, RangeId = 0;
+    Vec_Int_t * vNames[4]  = { &p->pNtk->vInputs,  &p->pNtk->vOutputs,  &p->pNtk->vInouts,  &p->pNtk->vWires };
+    Vec_Int_t * vNamesR[4] = { &p->pNtk->vInputsR, &p->pNtk->vOutputsR, &p->pNtk->vInoutsR, &p->pNtk->vWiresR };
+    assert( Type >= PRS_VER_INPUT && Type <= PRS_VER_WIRE );
+    if ( Psr_ManUtilSkipSpaces(p) )                                   return Psr_ManErrorSet(p, "Error number 20.", 0);
+    if ( Psr_ManIsChar(p, '[') && !(RangeId = Psr_ManReadRange(p)) )  return Psr_ManErrorSet(p, "Error number 21.", 0);
+    if ( !Psr_ManReadNameList( p, &p->vTemp, ';' ) )                  return Psr_ManErrorSet(p, "Error number 22.", 0);
+    Vec_IntForEachEntry( &p->vTemp, NameId, i )
+    {
+        Vec_IntPush( vNames[Type - PRS_VER_INPUT], NameId );
+        Vec_IntPush( vNamesR[Type - PRS_VER_INPUT], RangeId );
+        if ( Type < PRS_VER_WIRE )
+            Vec_IntPush( &p->pNtk->vOrder, Abc_Var2Lit2(NameId, Type) );
+    }
+    return 1;
+}
+static inline int Psr_ManReadAssign( Psr_Man_t * p )
+{
+    int OutItem, InItem, fCompl = 0, fCompl2 = 0, Oper = 0;
+    // read output name
+    OutItem = Psr_ManReadSignal( p );
+    if ( OutItem == 0 )                     return Psr_ManErrorSet(p, "Cannot read output in assign-statement.", 0);
+    if ( !Psr_ManIsChar(p, '=') )           return Psr_ManErrorSet(p, "Expecting \"=\" in assign-statement.", 0);
+    p->pCur++;
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 23.", 0);
+    if ( Psr_ManIsChar(p, '~') ) 
+    { 
+        fCompl = 1; 
+        p->pCur++; 
+    }
+    // read first name
+    InItem = Psr_ManReadSignal( p );
+    if ( InItem == 0 )                      return Psr_ManErrorSet(p, "Cannot read first input name in the assign-statement.", 0);
+    Vec_IntClear( &p->vTemp );
+    Vec_IntPush( &p->vTemp, 0 );
+    Vec_IntPush( &p->vTemp, InItem );
+    // check unary operator
+    if ( Psr_ManIsChar(p, ';') )
+    {
+        Vec_IntPush( &p->vTemp, 0 );
+        Vec_IntPush( &p->vTemp, OutItem );
+        Oper = fCompl ? BAC_BOX_INV : BAC_BOX_BUF;
+        Psr_NtkAddBox( p->pNtk, Oper, 0, &p->vTemp );
+        return 1;
+    }
+    if ( Psr_ManIsChar(p, '&') ) 
+        Oper = BAC_BOX_AND;
+    else if ( Psr_ManIsChar(p, '|') ) 
+        Oper = BAC_BOX_OR;
+    else if ( Psr_ManIsChar(p, '^') ) 
+        Oper = BAC_BOX_XOR;
+    else if ( Psr_ManIsChar(p, '?') ) 
+        Oper = BAC_BOX_MUX;
+    else                                    return Psr_ManErrorSet(p, "Unrecognized operator in the assign-statement.", 0);
+    p->pCur++; 
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 24.", 0);
+    if ( Psr_ManIsChar(p, '~') ) 
+    { 
+        fCompl2 = 1; 
+        p->pCur++; 
+    }
+    // read second name
+    InItem = Psr_ManReadSignal( p );
+    if ( InItem == 0 )                      return Psr_ManErrorSet(p, "Cannot read second input name in the assign-statement.", 0);
+    Vec_IntPush( &p->vTemp, 0 );
+    Vec_IntPush( &p->vTemp, InItem );
+    // read third argument
+    if ( Oper == BAC_BOX_MUX )
+    {
+        assert( fCompl == 0 ); 
+        if ( !Psr_ManIsChar(p, ':') )       return Psr_ManErrorSet(p, "Expected colon in the MUX assignment.", 0);
+        p->pCur++; 
+        // read third name
+        InItem = Psr_ManReadSignal( p );
+        if ( InItem == 0 )                  return Psr_ManErrorSet(p, "Cannot read third input name in the assign-statement.", 0);
+        Vec_IntPush( &p->vTemp, 0 );
+        Vec_IntPush( &p->vTemp, InItem );
+        if ( !Psr_ManIsChar(p, ';') )       return Psr_ManErrorSet(p, "Expected semicolon at the end of the assign-statement.", 0);
+    }
+    else
+    {
+        // figure out operator
+        if ( Oper == BAC_BOX_AND )
+        {
+            if ( fCompl && !fCompl2 )
+                Oper = BAC_BOX_SHARPL;
+            else if ( !fCompl && fCompl2 )
+                Oper = BAC_BOX_SHARP;
+            else if ( fCompl && fCompl2 )
+                Oper = BAC_BOX_NOR;
+        }
+        else if ( Oper == BAC_BOX_OR )
+        {
+            if ( fCompl && fCompl2 )
+                Oper = BAC_BOX_NAND;
+            else assert( !fCompl && !fCompl2 );
+        }
+        else if ( Oper == BAC_BOX_XOR )
+        {
+            if ( fCompl && !fCompl2 )
+                Oper = BAC_BOX_XNOR;
+            else assert( !fCompl && !fCompl2 );
+        }
+    }
+    // write binary operator
+    Vec_IntPush( &p->vTemp, 0 );
+    Vec_IntPush( &p->vTemp, OutItem );
+    Psr_NtkAddBox( p->pNtk, Oper, 0, &p->vTemp );
+    return 1;
+}
+static inline int Psr_ManReadInstance( Psr_Man_t * p, int Func )
+{
+    int InstId, Status;
+/*
+    static Counter = 0;
+    if ( ++Counter == 7 )
+    {
+        int s=0;
+    }
+*/
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 25.", 0);
+    if ( (InstId = Psr_ManReadName(p)) )
+        if (Psr_ManUtilSkipSpaces(p))       return Psr_ManErrorSet(p, "Error number 26.", 0);
+    if ( !Psr_ManIsChar(p, '(') )           return Psr_ManErrorSet(p, "Expecting \"(\" in module instantiation.", 0);
+    p->pCur++;
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 27.", 0);
+    if ( Psr_ManIsChar(p, '.') ) // box
+        Status = Psr_ManReadSignalList2(p, &p->vTemp);
+    else  // node
+    {
+        //char * s = Abc_NamStr(p->pStrs, Func);
+        // translate elementary gate
+        int iFuncNew = Psr_ManIsVerilogModule(p, Abc_NamStr(p->pStrs, Func));
+        if ( iFuncNew == 0 )                return Psr_ManErrorSet(p, "Cannot find elementary gate.", 0);
+        Func = iFuncNew;
+        Status = Psr_ManReadSignalList( p, &p->vTemp, ')', 1 );
+    }
+    if ( Status == 0 )                      return Psr_ManErrorSet(p, "Error number 28.", 0);
+    assert( Psr_ManIsChar(p, ')') );
+    p->pCur++;
+    if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 29.", 0);
+    if ( !Psr_ManIsChar(p, ';') )           return Psr_ManErrorSet(p, "Expecting semicolon in the instance.", 0);
+    // add box 
+    Psr_NtkAddBox( p->pNtk, Func, InstId, &p->vTemp );
+    return 1;
+}
+static inline int Psr_ManReadArguments( Psr_Man_t * p )
+{
+    int iRange = 0, iType = -1;
+    Vec_Int_t * vSigs[3]  = { &p->pNtk->vInputs,  &p->pNtk->vOutputs,  &p->pNtk->vInouts  };
+    Vec_Int_t * vSigsR[3] = { &p->pNtk->vInputsR, &p->pNtk->vOutputsR, &p->pNtk->vInoutsR };
+    assert( Psr_ManIsChar(p, '(') );
+    p->pCur++;
+    if ( Psr_ManUtilSkipSpaces(p) )             return Psr_ManErrorSet(p, "Error number 30.", 0);
+    while ( 1 )
+    {
+        int iName = Psr_ManReadName( p );
+        if ( iName == 0 )                       return Psr_ManErrorSet(p, "Error number 31.", 0);
+        if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 32.", 0);
+        if ( iName >= PRS_VER_INPUT && iName <= PRS_VER_INOUT ) // declaration
+        {
+            iType = iName;
+            if ( Psr_ManIsChar(p, '[') )
+            {
+                iRange = Psr_ManReadRange(p);
+                if ( iRange == 0 )              return Psr_ManErrorSet(p, "Error number 33.", 0);
+                if ( Psr_ManUtilSkipSpaces(p) ) return Psr_ManErrorSet(p, "Error number 34.", 0);
+            }
+            iName = Psr_ManReadName( p );
+            if ( iName == 0 )                   return Psr_ManErrorSet(p, "Error number 35.", 0);
+        }
+        if ( iType > 0 )
+        {
+            Vec_IntPush( vSigs[iType - PRS_VER_INPUT], iName );
+            Vec_IntPush( vSigsR[iType - PRS_VER_INPUT], iRange );
+            Vec_IntPush( &p->pNtk->vOrder, Abc_Var2Lit2(iName, iType) );
+        }
+        if ( Psr_ManIsChar(p, ')') )
+            break;
+        if ( !Psr_ManIsChar(p, ',') )           return Psr_ManErrorSet(p, "Expecting comma in the instance.", 0);
+        p->pCur++;
+        if ( Psr_ManUtilSkipSpaces(p) )         return Psr_ManErrorSet(p, "Error number 36.", 0);
+    }
+    // check final
+    assert( Psr_ManIsChar(p, ')') );
+    return 1;
+}
+// this procedure can return:
+// 0 = reached end-of-file; 1 = successfully parsed; 2 = recognized as primitive; 3 = failed and skipped; 4 = error (failed and could not skip)
+static inline int Psr_ManReadModule( Psr_Man_t * p )
+{
+    int iToken, Status;
+    if ( p->pNtk != NULL )                  return Psr_ManErrorSet(p, "Parsing previous module is unfinished.", 4);
+    if ( Psr_ManUtilSkipSpaces(p) )
+    { 
+        Psr_ManErrorClear( p );       
+        return 0; 
+    }
+    // read keyword
+    iToken = Psr_ManReadName( p );
+    if ( iToken != PRS_VER_MODULE )         return Psr_ManErrorSet(p, "Cannot read \"module\" keyword.", 4);
+    if ( Psr_ManUtilSkipSpaces(p) )         return 4;
+    // read module name
+    iToken = Psr_ManReadName( p );
+    if ( iToken == 0 )                      return Psr_ManErrorSet(p, "Cannot read module name.", 4);
+    if ( Psr_ManIsKnownModule(p, Abc_NamStr(p->pStrs, iToken)) )
+    {
+        if ( Psr_ManUtilSkipUntilWord( p, "endmodule" ) ) return Psr_ManErrorSet(p, "Cannot find \"endmodule\" keyword.", 4);
+        //printf( "Warning! Skipped known module \"%s\".\n", Abc_NamStr(p->pStrs, iToken) );
+        Vec_IntPush( &p->vKnown, iToken );
+        return 2;
+    }
+    Psr_ManInitializeNtk( p, iToken, 1 );
+    // skip arguments
+    if ( Psr_ManUtilSkipSpaces(p) )         return 4;
+    if ( !Psr_ManIsChar(p, '(') )           return Psr_ManErrorSet(p, "Cannot find \"(\" in the argument declaration.", 4);
+    if ( !Psr_ManReadArguments(p) )         return 4;
+    assert( *p->pCur == ')' );
+    p->pCur++;
+    if ( Psr_ManUtilSkipSpaces(p) )         return 4;
+    // read declarations and instances
+    while ( Psr_ManIsChar(p, ';') )
+    {
+        p->pCur++;
+        if ( Psr_ManUtilSkipSpaces(p) )     return 4;
+        iToken = Psr_ManReadName( p );
+        if ( iToken == PRS_VER_ENDMODULE )
+        {
+            Vec_IntPush( &p->vSucceeded, p->pNtk->iModuleName );
+            Psr_ManFinalizeNtk( p );
+            return 1;
+        }
+        if ( iToken >= PRS_VER_INPUT && iToken <= PRS_VER_WIRE ) // declaration
+            Status = Psr_ManReadDeclaration( p, iToken );
+        else if ( iToken == PRS_VER_REG || iToken == PRS_VER_DEFPARAM ) // unsupported keywords
+            Status = Psr_ManUtilSkipUntil( p, ';' );
+        else // read instance
+        {
+            if ( iToken == PRS_VER_ASSIGN )
+                Status = Psr_ManReadAssign( p );
+            else
+                Status = Psr_ManReadInstance( p, iToken );
+            if ( Status == 0 )
+            {
+                if ( Psr_ManUtilSkipUntilWord( p, "endmodule" ) ) return Psr_ManErrorSet(p, "Cannot find \"endmodule\" keyword.", 4);
+                //printf( "Warning! Failed to parse \"%s\". Adding module \"%s\" as blackbox.\n", 
+                //    Abc_NamStr(p->pStrs, iToken), Abc_NamStr(p->pStrs, p->pNtk->iModuleName) );
+                Vec_IntPush( &p->vFailed, p->pNtk->iModuleName );
+                // cleanup
+                Vec_IntErase( &p->pNtk->vWires );
+                Vec_IntErase( &p->pNtk->vWiresR );
+                Vec_IntErase( &p->pNtk->vSlices );
+                Vec_IntErase( &p->pNtk->vConcats );
+                Vec_IntErase( &p->pNtk->vBoxes );
+                Vec_IntErase( &p->pNtk->vObjs );
+                p->fUsingTemp2 = 0;
+                // add
+                Psr_ManFinalizeNtk( p );
+                Psr_ManErrorClear( p );
+                return 3;
+            }
+        }
+        if ( !Status )                      return 4;
+        if ( Psr_ManUtilSkipSpaces(p) )     return 4;
+    }
+    return Psr_ManErrorSet(p, "Cannot find \";\" in the module definition.", 4);
+}
+static inline int Psr_ManReadDesign( Psr_Man_t * p )
+{
+    while ( 1 )
+    {
+        int RetValue = Psr_ManReadModule( p );
+        if ( RetValue == 0 ) // end of file
+            break;
+        if ( RetValue == 1 ) // successfully parsed
+            continue;
+        if ( RetValue == 2 ) // recognized as primitive
+            continue;
+        if ( RetValue == 3 ) // failed and skipped
+            continue;
+        if ( RetValue == 4 ) // error
+            return 0;
+        assert( 0 );
+    }
+    return 1;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Psr_ManPrintModules( Psr_Man_t * p )
+{
+    char * pName; int i; 
+    printf( "Succeeded parsing %d models:\n", Vec_IntSize(&p->vSucceeded) );
+    Psr_ManForEachNameVec( &p->vSucceeded, p, pName, i )
+        printf( " %s", pName );
+    printf( "\n" );
+    printf( "Skipped %d known models:\n", Vec_IntSize(&p->vKnown) );
+    Psr_ManForEachNameVec( &p->vKnown, p, pName, i )
+        printf( " %s", pName );
+    printf( "\n" );
+    printf( "Skipped %d failed models:\n", Vec_IntSize(&p->vFailed) );
+    Psr_ManForEachNameVec( &p->vFailed, p, pName, i )
+        printf( " %s", pName );
+    printf( "\n" );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Ptr_t * Psr_ManReadVerilog( char * pFileName )
+{
+    Vec_Ptr_t * vPrs = NULL;
+    Psr_Man_t * p = Psr_ManAlloc( pFileName );
+    if ( p == NULL )
+        return NULL;
+    Psr_NtkAddVerilogDirectives( p );
+    Psr_ManReadDesign( p );   
+    //Psr_ManPrintModules( p );
+    if ( Psr_ManErrorPrint(p) )
+        ABC_SWAP( Vec_Ptr_t *, vPrs, p->vNtks );
+    Psr_ManFree( p );
+    return vPrs;
+}
+
+void Psr_ManReadVerilogTest( char * pFileName )
+{
+    abctime clk = Abc_Clock();
+    extern void Psr_ManWriteVerilog( char * pFileName, Vec_Ptr_t * p );
+    Vec_Ptr_t * vPrs = Psr_ManReadVerilog( "c/hie/dump/1/netlist_1.v" );
+//    Vec_Ptr_t * vPrs = Psr_ManReadVerilog( "aga/me/me_wide.v" );
+//    Vec_Ptr_t * vPrs = Psr_ManReadVerilog( "aga/ray/ray_wide.v" );
+    if ( !vPrs ) return;
+    printf( "Finished reading %d networks. ", Vec_PtrSize(vPrs) );
+    printf( "NameIDs = %d. ", Abc_NamObjNumMax(Psr_ManNameMan(vPrs)) );
+    printf( "Memory = %.2f MB. ", 1.0*Psr_ManMemory(vPrs)/(1<<20) );
+    Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
+    Psr_ManWriteVerilog( "c/hie/dump/1/netlist_1_out_new.v", vPrs );
+//    Psr_ManWriteVerilog( "aga/me/me_wide_out.v", vPrs );
+//    Psr_ManWriteVerilog( "aga/ray/ray_wide_out.v", vPrs );
+//    Abc_NamPrint( p->pStrs );
+    Psr_ManVecFree( vPrs );
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/bac/bacWriteBlif.c b/src/base/bac/bacWriteBlif.c
new file mode 100644
index 00000000..ba2d2e50
--- /dev/null
+++ b/src/base/bac/bacWriteBlif.c
@@ -0,0 +1,236 @@
+/**CFile****************************************************************
+
+  FileName    [bacWriteBlif.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Verilog parser.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacWriteBlif.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+#include "map/mio/mio.h"
+#include "base/main/main.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Writing parser state into a file.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static void Psr_ManWriteBlifArray( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vFanins )
+{
+    int i, NameId;
+    Vec_IntForEachEntry( vFanins, NameId, i )
+        fprintf( pFile, " %s", Psr_NtkStr(p, NameId) );
+    fprintf( pFile, "\n" );
+}
+static void Psr_ManWriteBlifLines( FILE * pFile, Psr_Ntk_t * p )
+{
+    Vec_Int_t * vBox; 
+    int i, k, FormId, ActId;
+    Psr_NtkForEachBox( p, vBox, i )
+    {
+        int NtkId = Psr_BoxNtk(p, i);
+        assert( Psr_BoxIONum(p, i) > 0 );
+        assert( Vec_IntSize(vBox) % 2 == 0 );
+        if ( NtkId == -1 ) // latch
+        {
+            fprintf( pFile, ".latch" );
+            fprintf( pFile, " %s", Psr_NtkStr(p, Vec_IntEntry(vBox, 1)) );
+            fprintf( pFile, " %s", Psr_NtkStr(p, Vec_IntEntry(vBox, 3)) );
+            fprintf( pFile, " %c\n", '0' + Psr_BoxName(p, i) );
+        }
+        else if ( Psr_BoxIsNode(p, i) ) // node
+        {
+            fprintf( pFile, ".names" );
+            Vec_IntForEachEntryDouble( vBox, FormId, ActId, k )
+                fprintf( pFile, " %s", Psr_NtkStr(p, ActId) );
+            fprintf( pFile, "\n%s", Psr_NtkStr(p, NtkId) );
+        }
+        else // box
+        {
+            fprintf( pFile, ".subckt" );
+            fprintf( pFile, " %s", Psr_NtkStr(p, NtkId) );
+            Vec_IntForEachEntryDouble( vBox, FormId, ActId, k )
+                fprintf( pFile, " %s=%s", Psr_NtkStr(p, FormId), Psr_NtkStr(p, ActId) );
+            fprintf( pFile, "\n" );
+        }
+    }
+}
+static void Psr_ManWriteBlifNtk( FILE * pFile, Psr_Ntk_t * p )
+{
+    // write header
+    fprintf( pFile, ".model %s\n", Psr_NtkStr(p, p->iModuleName) );
+    if ( Vec_IntSize(&p->vInouts) )
+    fprintf( pFile, ".inouts" );
+    if ( Vec_IntSize(&p->vInouts) )
+    Psr_ManWriteBlifArray( pFile, p, &p->vInouts );
+    fprintf( pFile, ".inputs" );
+    Psr_ManWriteBlifArray( pFile, p, &p->vInputs );
+    fprintf( pFile, ".outputs" );
+    Psr_ManWriteBlifArray( pFile, p, &p->vOutputs );
+    // write objects
+    Psr_ManWriteBlifLines( pFile, p );
+    fprintf( pFile, ".end\n\n" );
+}
+void Psr_ManWriteBlif( char * pFileName, Vec_Ptr_t * vPrs )
+{
+    Psr_Ntk_t * pNtk = Psr_ManRoot(vPrs);
+    FILE * pFile = fopen( pFileName, "wb" ); int i;
+    if ( pFile == NULL )
+    {
+        printf( "Cannot open output file \"%s\".\n", pFileName );
+        return;
+    }
+    fprintf( pFile, "# Design \"%s\" written by ABC on %s\n\n", Psr_NtkStr(pNtk, pNtk->iModuleName), Extra_TimeStamp() );
+    Vec_PtrForEachEntry( Psr_Ntk_t *, vPrs, pNtk, i )
+        Psr_ManWriteBlifNtk( pFile, pNtk );
+    fclose( pFile );
+}
+
+
+
+/**Function*************************************************************
+
+  Synopsis    [Write elaborated design.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Bac_ManWriteBlifGate( FILE * pFile, Bac_Ntk_t * p, Mio_Gate_t * pGate, Vec_Int_t * vFanins, int iObj )
+{
+    int iFanin, i;
+    Vec_IntForEachEntry( vFanins, iFanin, i )
+        fprintf( pFile, " %s=%s", Mio_GateReadPinName(pGate, i), Bac_ObjNameStr(p, iFanin) );
+    fprintf( pFile, " %s=%s", Mio_GateReadOutName(pGate), Bac_ObjNameStr(p, iObj) );
+    fprintf( pFile, "\n" );
+}
+void Bac_ManWriteBlifArray( FILE * pFile, Bac_Ntk_t * p, Vec_Int_t * vFanins, int iObj )
+{
+    int iFanin, i;
+    Vec_IntForEachEntry( vFanins, iFanin, i )
+        fprintf( pFile, " %s", Bac_ObjNameStr(p, iFanin) );
+    if ( iObj >= 0 )
+        fprintf( pFile, " %s", Bac_ObjNameStr(p, iObj) );
+    fprintf( pFile, "\n" );
+}
+void Bac_ManWriteBlifArray2( FILE * pFile, Bac_Ntk_t * p, int iObj )
+{
+    int iTerm, i;
+    Bac_Ntk_t * pModel = Bac_BoxNtk( p, iObj );
+    Bac_NtkForEachPi( pModel, iTerm, i )
+        fprintf( pFile, " %s=%s", Bac_ObjNameStr(pModel, iTerm), Bac_ObjNameStr(p, Bac_BoxBi(p, iObj, i)) );
+    Bac_NtkForEachPo( pModel, iTerm, i )
+        fprintf( pFile, " %s=%s", Bac_ObjNameStr(pModel, iTerm), Bac_ObjNameStr(p, Bac_BoxBo(p, iObj, i)) );
+    fprintf( pFile, "\n" );
+}
+void Bac_ManWriteBlifLines( FILE * pFile, Bac_Ntk_t * p )
+{
+    int i, k, iTerm;
+    Bac_NtkForEachBox( p, i )
+    {
+        if ( Bac_ObjIsBoxUser(p, i) )
+        {
+            fprintf( pFile, ".subckt" );
+            fprintf( pFile, " %s", Bac_NtkName(Bac_BoxNtk(p, i)) );
+            Bac_ManWriteBlifArray2( pFile, p, i );
+        }
+        else if ( Bac_ObjIsGate(p, i) )
+        {
+            char * pGateName = Abc_NamStr(p->pDesign->pMods, Bac_BoxNtkId(p, i));
+            Mio_Library_t * pLib = (Mio_Library_t *)Abc_FrameReadLibGen();
+            Mio_Gate_t * pGate = Mio_LibraryReadGateByName( pLib, pGateName, NULL );
+            fprintf( pFile, ".gate %s", pGateName );
+            Bac_BoxForEachBi( p, i, iTerm, k )
+                fprintf( pFile, " %s=%s", Mio_GateReadPinName(pGate, k), Bac_ObjNameStr(p, iTerm) );
+            Bac_BoxForEachBo( p, i, iTerm, k )
+                fprintf( pFile, " %s=%s", Mio_GateReadOutName(pGate), Bac_ObjNameStr(p, iTerm) );
+            fprintf( pFile, "\n" );
+        }
+        else
+        {
+            fprintf( pFile, ".names" );
+            Bac_BoxForEachBi( p, i, iTerm, k )
+                fprintf( pFile, " %s", Bac_ObjNameStr(p, Bac_ObjFanin(p, iTerm)) );
+            Bac_BoxForEachBo( p, i, iTerm, k )
+                fprintf( pFile, " %s", Bac_ObjNameStr(p, iTerm) );
+            fprintf( pFile, "\n%s",  Ptr_TypeToSop(Bac_ObjType(p, i)) );
+        }
+    }
+}
+void Bac_ManWriteBlifNtk( FILE * pFile, Bac_Ntk_t * p )
+{
+    assert( Vec_IntSize(&p->vFanin) == Bac_NtkObjNum(p) );
+    // write header
+    fprintf( pFile, ".model %s\n", Bac_NtkName(p) );
+    fprintf( pFile, ".inputs" );
+    Bac_ManWriteBlifArray( pFile, p, &p->vInputs, -1 );
+    fprintf( pFile, ".outputs" );
+    Bac_ManWriteBlifArray( pFile, p, &p->vOutputs, -1 );
+    // write objects
+    Bac_ManWriteBlifLines( pFile, p );
+    fprintf( pFile, ".end\n\n" );
+}
+void Bac_ManWriteBlif( char * pFileName, Bac_Man_t * p )
+{
+    FILE * pFile;
+    Bac_Ntk_t * pNtk; 
+    int i;
+    // check the library
+    if ( p->pMioLib && p->pMioLib != Abc_FrameReadLibGen() )
+    {
+        printf( "Genlib library used in the mapped design is not longer a current library.\n" );
+        return;
+    }
+    pFile = fopen( pFileName, "wb" );
+    if ( pFile == NULL )
+    {
+        printf( "Cannot open output file \"%s\".\n", pFileName );
+        return;
+    }
+    fprintf( pFile, "# Design \"%s\" written via CBA package in ABC on %s\n\n", Bac_ManName(p), Extra_TimeStamp() );
+    Bac_ManAssignInternWordNames( p );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_ManWriteBlifNtk( pFile, pNtk );
+    fclose( pFile );
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/cba/cbaWriteSmt.c b/src/base/bac/bacWriteSmt.c
index 5d1a0a51..eacc5a06 100644
--- a/src/base/cba/cbaWriteSmt.c
+++ b/src/base/bac/bacWriteSmt.c
@@ -1,6 +1,6 @@
 /**CFile****************************************************************
 
-  FileName    [cbaWriteSmt.c]
+  FileName    [bacWriteSmt.c]
 
   SystemName  [ABC: Logic synthesis and verification system.]
 
@@ -14,11 +14,11 @@
 
   Date        [Ver. 1.0. Started - November 29, 2014.]
 
-  Revision    [$Id: cbaWriteSmt.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+  Revision    [$Id: bacWriteSmt.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
 
 ***********************************************************************/
 
-#include "cba.h"
+#include "bac.h"
 
 ABC_NAMESPACE_IMPL_START
 
diff --git a/src/base/bac/bacWriteVer.c b/src/base/bac/bacWriteVer.c
new file mode 100644
index 00000000..83826fe7
--- /dev/null
+++ b/src/base/bac/bacWriteVer.c
@@ -0,0 +1,703 @@
+/**CFile****************************************************************
+
+  FileName    [bacWriteVer.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Hierarchical word-level netlist.]
+
+  Synopsis    [Verilog writer.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 29, 2014.]
+
+  Revision    [$Id: bacWriteVer.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "bac.h"
+#include "bacPrs.h"
+#include "map/mio/mio.h"
+#include "base/main/main.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Writing parser state into a file.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+static void Psr_ManWriteVerilogConcat( FILE * pFile, Psr_Ntk_t * p, int Con )
+{
+    extern void Psr_ManWriteVerilogArray( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vSigs, int Start, int Stop, int fOdd );
+    Vec_Int_t * vSigs = Psr_CatSignals(p, Con);
+    fprintf( pFile, "{" );
+    Psr_ManWriteVerilogArray( pFile, p, vSigs, 0, Vec_IntSize(vSigs), 0 );
+    fprintf( pFile, "}" );
+}
+static void Psr_ManWriteVerilogSignal( FILE * pFile, Psr_Ntk_t * p, int Sig )
+{
+    int Value = Abc_Lit2Var2( Sig );
+    Psr_ManType_t Type = (Psr_ManType_t)Abc_Lit2Att2( Sig );
+    if ( Type == BAC_PRS_NAME || Type == BAC_PRS_CONST )
+        fprintf( pFile, "%s", Psr_NtkStr(p, Value) );
+    else if ( Type == BAC_PRS_SLICE )
+        fprintf( pFile, "%s%s", Psr_NtkStr(p, Psr_SliceName(p, Value)), Psr_NtkStr(p, Psr_SliceRange(p, Value)) );
+    else if ( Type == BAC_PRS_CONCAT )
+        Psr_ManWriteVerilogConcat( pFile, p, Value );
+    else assert( 0 );
+}
+static void Psr_ManWriteVerilogArray( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vSigs, int Start, int Stop, int fOdd )
+{
+    int i, Sig;
+    assert( Vec_IntSize(vSigs) > 0 );
+    Vec_IntForEachEntryStartStop( vSigs, Sig, i, Start, Stop )
+    {
+        if ( fOdd && !(i & 1) )
+            continue;
+        Psr_ManWriteVerilogSignal( pFile, p, Sig );
+        fprintf( pFile, "%s", i == Stop - 1 ? "" : ", " );
+    }
+}
+static void Psr_ManWriteVerilogArray2( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vSigs )
+{
+    int i, FormId, ActSig;
+    assert( Vec_IntSize(vSigs) % 2 == 0 );
+    Vec_IntForEachEntryDouble( vSigs, FormId, ActSig, i )
+    {
+        fprintf( pFile, "." );
+        fprintf( pFile, "%s", Psr_NtkStr(p, FormId) );
+        fprintf( pFile, "(" );
+        Psr_ManWriteVerilogSignal( pFile, p, ActSig );
+        fprintf( pFile, ")%s", (i == Vec_IntSize(vSigs) - 2) ? "" : ", " );
+    }
+}
+static void Psr_ManWriteVerilogMux( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vSigs )
+{
+    int i, FormId, ActSig;
+    char * pStrs[4] = { " = ", " ? ", " : ", ";\n" };
+    assert( Vec_IntSize(vSigs) == 8 );
+    fprintf( pFile, "  assign " );
+    Psr_ManWriteVerilogSignal( pFile, p, Vec_IntEntryLast(vSigs) );
+    fprintf( pFile, "%s", pStrs[0] );
+    Vec_IntForEachEntryDouble( vSigs, FormId, ActSig, i )
+    {
+        Psr_ManWriteVerilogSignal( pFile, p, ActSig );
+        fprintf( pFile, "%s", pStrs[1+i/2] );
+        if ( i == 4 )
+            break;
+    }
+}
+static void Psr_ManWriteVerilogBoxes( FILE * pFile, Psr_Ntk_t * p )
+{
+    Vec_Int_t * vBox; int i;
+    Psr_NtkForEachBox( p, vBox, i )
+    {
+        Bac_ObjType_t NtkId = Psr_BoxNtk(p, i);
+        if ( NtkId == BAC_BOX_MUX )
+            Psr_ManWriteVerilogMux( pFile, p, vBox );
+        else if ( Psr_BoxIsNode(p, i) ) // node   ------- check order of fanins
+        {
+            fprintf( pFile, "  %s (", Ptr_TypeToName(NtkId) );
+            Psr_ManWriteVerilogSignal( pFile, p, Vec_IntEntryLast(vBox) );
+            if ( Psr_BoxIONum(p, i) > 1 )
+                fprintf( pFile, ", " );                
+            Psr_ManWriteVerilogArray( pFile, p, vBox, 0, Vec_IntSize(vBox)-2, 1 );
+            fprintf( pFile, ");\n" );
+        }
+        else // box
+        {
+            //char * s = Psr_NtkStr(p, Vec_IntEntry(vBox, 0));
+            fprintf( pFile, "  %s %s (", Psr_NtkStr(p, NtkId), Psr_BoxName(p, i) ? Psr_NtkStr(p, Psr_BoxName(p, i)) : "" );
+            Psr_ManWriteVerilogArray2( pFile, p, vBox );
+            fprintf( pFile, ");\n" );
+        }
+    }
+}
+static void Psr_ManWriteVerilogIos( FILE * pFile, Psr_Ntk_t * p, int SigType )
+{
+    int NameId, RangeId, i;
+    char * pSigNames[4]   = { "inout", "input", "output", "wire" }; 
+    Vec_Int_t * vSigs[4]  = { &p->vInouts,  &p->vInputs,  &p->vOutputs,  &p->vWires };
+    Vec_Int_t * vSigsR[4] = { &p->vInoutsR, &p->vInputsR, &p->vOutputsR, &p->vWiresR };
+    if ( SigType == 3 )
+        fprintf( pFile, "\n" );
+    Vec_IntForEachEntryTwo( vSigs[SigType], vSigsR[SigType], NameId, RangeId, i )
+        fprintf( pFile, "  %s %s%s;\n", pSigNames[SigType], RangeId ? Psr_NtkStr(p, RangeId) : "", Psr_NtkStr(p, NameId) );
+}
+static void Psr_ManWriteVerilogIoOrder( FILE * pFile, Psr_Ntk_t * p, Vec_Int_t * vOrder )
+{
+    int i, NameId;
+    Vec_IntForEachEntry( vOrder, NameId, i )
+        fprintf( pFile, "%s%s", Psr_NtkStr(p, NameId), i == Vec_IntSize(vOrder) - 1 ? "" : ", " );
+}
+static void Psr_ManWriteVerilogNtk( FILE * pFile, Psr_Ntk_t * p )
+{
+    int s;
+    // write header
+    fprintf( pFile, "module %s (\n    ", Psr_NtkStr(p, p->iModuleName) );
+    Psr_ManWriteVerilogIoOrder( pFile, p, &p->vOrder );
+    fprintf( pFile, "\n  );\n" );
+    // write declarations
+    for ( s = 0; s < 4; s++ )
+        Psr_ManWriteVerilogIos( pFile, p, s );
+    fprintf( pFile, "\n" );
+    // write objects
+    Psr_ManWriteVerilogBoxes( pFile, p );
+    fprintf( pFile, "endmodule\n\n" );
+}
+void Psr_ManWriteVerilog( char * pFileName, Vec_Ptr_t * vPrs )
+{
+    Psr_Ntk_t * pNtk = Psr_ManRoot(vPrs); int i;
+    FILE * pFile = fopen( pFileName, "wb" );
+    if ( pFile == NULL )
+    {
+        printf( "Cannot open output file \"%s\".\n", pFileName );
+        return;
+    }
+    fprintf( pFile, "// Design \"%s\" written by ABC on %s\n\n", Psr_NtkStr(pNtk, pNtk->iModuleName), Extra_TimeStamp() );
+    Vec_PtrForEachEntry( Psr_Ntk_t *, vPrs, pNtk, i )
+        Psr_ManWriteVerilogNtk( pFile, pNtk );
+    fclose( pFile );
+}
+
+
+
+/**Function*************************************************************
+
+  Synopsis    [Writing word-level Verilog.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+// compute range of a name (different from range of a multi-bit wire)
+static inline int Bac_ObjGetRange( Bac_Ntk_t * p, int iObj )
+{
+    int i, NameId = Bac_ObjName(p, iObj);
+    assert( Bac_ObjIsCi(p, iObj) );
+//    if ( Bac_NameType(NameId) == BAC_NAME_INDEX )
+//        NameId = Bac_ObjName(p, iObj - Abc_Lit2Var2(NameId));
+    assert( Bac_NameType(NameId) == BAC_NAME_WORD || Bac_NameType(NameId) == BAC_NAME_INFO );
+    for ( i = iObj + 1; i < Bac_NtkObjNum(p); i++ )
+        if ( !Bac_ObjIsCi(p, i) || Bac_ObjNameType(p, i) != BAC_NAME_INDEX )
+            break;
+    return i - iObj;
+}
+
+static inline void Bac_ManWriteVar( Bac_Ntk_t * p, int RealName )
+{
+    Vec_StrPrintStr( p->pDesign->vOut, Bac_NtkStr(p, RealName) );
+}
+static inline void Bac_ManWriteRange( Bac_Ntk_t * p, int Beg, int End )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut;
+    Vec_StrPrintStr( vStr, "[" );
+    if ( End >= 0 )
+    {
+        Vec_StrPrintNum( vStr, End );
+        Vec_StrPrintStr( vStr, ":" );
+    }
+    Vec_StrPrintNum( vStr, Beg );
+    Vec_StrPrintStr( vStr, "]" );
+}
+static inline void Bac_ManWriteConstBit( Bac_Ntk_t * p, int iObj, int fHead )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut;
+    int Const = Bac_ObjGetConst(p, iObj);
+    assert( Const );
+    if ( fHead )
+        Vec_StrPrintStr( vStr, "1\'b" );
+    if ( Const == BAC_BOX_CF )
+        Vec_StrPush( vStr, '0' );
+    else if ( Const == BAC_BOX_CT )
+        Vec_StrPush( vStr, '1' );
+    else if ( Const == BAC_BOX_CX )
+        Vec_StrPush( vStr, 'x' );
+    else if ( Const == BAC_BOX_CZ )
+        Vec_StrPush( vStr, 'z' );
+    else assert( 0 );
+}
+static inline int Bac_ManFindRealNameId( Bac_Ntk_t * p, int iObj )
+{
+    int NameId = Bac_ObjName(p, iObj);
+    assert( Bac_ObjIsCi(p, iObj) );
+    if ( Bac_NameType(NameId) == BAC_NAME_INDEX )
+        NameId = Bac_ObjName(p, iObj - Abc_Lit2Var2(NameId));
+    if ( Bac_NameType(NameId) == BAC_NAME_INFO )
+        return Bac_NtkInfoName(p, Abc_Lit2Var2(NameId));
+    assert( Bac_NameType(NameId) == BAC_NAME_BIN || Bac_NameType(NameId) == BAC_NAME_WORD );
+    return Abc_Lit2Var2(NameId);
+}
+static inline int Bac_ManFindRealIndex( Bac_Ntk_t * p, int iObj )
+{
+    int iBit = 0, NameId = Bac_ObjName(p, iObj);
+    assert( Bac_ObjIsCi(p, iObj) );
+    assert( Bac_NameType(NameId) != BAC_NAME_BIN );
+    if ( Bac_NameType(NameId) == BAC_NAME_INDEX )
+        NameId = Bac_ObjName(p, iObj - (iBit = Abc_Lit2Var2(NameId)));
+    if ( Bac_NameType(NameId) == BAC_NAME_INFO )
+        return Bac_NtkInfoIndex(p, Abc_Lit2Var2(NameId), iBit);
+    assert( Bac_NameType(NameId) == BAC_NAME_WORD );
+    return iBit;
+}
+static inline void Bac_ManWriteSig( Bac_Ntk_t * p, int iObj )
+{
+    if ( Bac_ObjIsCo(p, iObj) )
+        iObj = Bac_ObjFanin(p, iObj);
+    assert( Bac_ObjIsCi(p, iObj) );
+    if ( Bac_ObjGetConst(p, iObj) )
+        Bac_ManWriteConstBit( p, iObj, 1 );
+    else
+    {
+        int NameId = Bac_ObjName(p, iObj);
+        if ( Bac_NameType(NameId) == BAC_NAME_BIN )
+            Bac_ManWriteVar( p, Abc_Lit2Var2(NameId) );
+        else
+        {
+            Bac_ManWriteVar( p, Bac_ManFindRealNameId(p, iObj) );
+            Bac_ManWriteRange( p, Bac_ManFindRealIndex(p, iObj), -1 );
+        }
+    }
+}
+static inline void Bac_ManWriteConcat( Bac_Ntk_t * p, int iStart, int nObjs )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut; 
+    assert( nObjs >= 1 );
+    if ( nObjs == 1 )
+    {
+        Bac_ManWriteSig( p, iStart );
+        return;
+    }
+    Vec_StrPrintStr( vStr, "{" );
+    if ( Bac_ObjIsBo(p, iStart) ) // box output
+    {
+        int i;
+        for ( i = iStart + nObjs - 1; i >= iStart; i-- )
+        {
+            if ( Bac_ObjNameType(p, i) == BAC_NAME_INDEX )
+                continue;
+            if ( Vec_StrEntryLast(vStr) != '{' )
+                Vec_StrPrintStr( vStr, ", " );
+            Bac_ManWriteVar( p, Bac_ManFindRealNameId(p, i) );
+        }
+    }
+    else if ( Bac_ObjIsBi(p, iStart) ) // box input
+    {
+        int e, b, k, NameId;
+        for ( e = iStart - nObjs + 1; e <= iStart; )
+        {
+            if ( Vec_StrEntryLast(vStr) != '{' )
+                Vec_StrPrintStr( vStr, ", " );
+            // write constant
+            if ( Bac_ObjGetConst(p, Bac_ObjFanin(p, e)) )
+            {
+                int fBinary = Bac_ObjIsConstBin(p, Bac_ObjFanin(p, e)-1);                
+                for ( b = e + 1; b <= iStart; b++ )
+                {
+                    if ( !Bac_ObjGetConst(p, Bac_ObjFanin(p, b)) )
+                        break;
+                    if ( !Bac_ObjIsConstBin(p, Bac_ObjFanin(p, b)-1) )
+                        fBinary = 0;
+                }
+                Vec_StrPrintNum( vStr, b - e );
+                if ( fBinary && b - e > 8 ) // write hex if more than 8 bits
+                {
+                    int Digit = 0, nBits = ((b - e) & 3) ? (b - e) & 3 : 4;
+                    Vec_StrPrintStr( vStr, "\'h" );
+                    for ( k = e; k < b; k++ )
+                    {
+                        Digit = 2*Digit + Bac_ObjGetConst(p, Bac_ObjFanin(p, k)) - BAC_BOX_CF;
+                        assert( Digit < 16 );
+                        if ( --nBits == 0 )
+                        {
+                            Vec_StrPush( vStr, (char)(Digit < 10 ? '0' + Digit : 'a' + Digit - 10) );
+                            nBits = 4;
+                            Digit = 0;
+                        }
+                    }
+                    assert( nBits == 4 );
+                    assert( Digit == 0 );
+                }
+                else
+                {
+                    Vec_StrPrintStr( vStr, "\'b" );
+                    for ( k = e; k < b; k++ )
+                        Bac_ManWriteConstBit( p, Bac_ObjFanin(p, k), 0 );
+                }
+                e = b;
+                continue;
+            }
+            // try replication
+            for ( b = e + 1; b <= iStart; b++ )
+                if ( Bac_ObjFanin(p, b) != Bac_ObjFanin(p, e) )
+                    break;
+            if ( b > e + 2 ) // more than two
+            {
+                Vec_StrPrintNum( vStr, b - e );
+                Vec_StrPrintStr( vStr, "{" );
+                Bac_ManWriteSig( p, e );
+                Vec_StrPrintStr( vStr, "}" );
+                e = b;
+                continue;
+            }
+            NameId = Bac_ObjName(p, Bac_ObjFanin(p, e));
+            if ( Bac_NameType(NameId) == BAC_NAME_BIN )
+            {
+                Bac_ManWriteVar( p, Abc_Lit2Var2(NameId) );
+                e++;
+                continue;
+            }
+            // find end of the slice
+            for ( b = e + 1; b <= iStart; b++ )
+                if ( Bac_ObjFanin(p, e) - Bac_ObjFanin(p, b) != b - e )
+                    break;
+            // write signal name
+            Bac_ManWriteVar( p, Bac_ManFindRealNameId(p, Bac_ObjFanin(p, e)) );
+            if ( b == e + 1 ) // literal
+                Bac_ManWriteRange( p, Bac_ManFindRealIndex(p, Bac_ObjFanin(p, e)), -1 );
+            else // slice or complete variable
+            {
+                // consider first variable of the slice
+                int f = Bac_ObjFanin( p, b-1 );
+                assert( Bac_ObjNameType(p, f) != BAC_NAME_BIN );
+                if ( Bac_ObjNameType(p, f) == BAC_NAME_INDEX || Bac_ObjGetRange(p, f) != b - e ) // slice
+                    Bac_ManWriteRange( p, Bac_ManFindRealIndex(p, f), Bac_ManFindRealIndex(p, Bac_ObjFanin(p, e)) );
+                // else this is complete variable
+            }
+            e = b;
+        }
+    }
+    else assert( 0 );
+    Vec_StrPrintStr( vStr, "}" );
+}
+static inline void Bac_ManWriteGate( Bac_Ntk_t * p, int iObj )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut; int iTerm, k;
+    char * pGateName = Abc_NamStr(p->pDesign->pMods, Bac_BoxNtkId(p, iObj));
+    Mio_Library_t * pLib = (Mio_Library_t *)Abc_FrameReadLibGen();
+    Mio_Gate_t * pGate = Mio_LibraryReadGateByName( pLib, pGateName, NULL );
+    Vec_StrPrintStr( vStr, "  " );
+    Vec_StrPrintStr( vStr, pGateName );
+    Vec_StrPrintStr( vStr, " " );
+    Vec_StrPrintStr( vStr, Bac_ObjName(p, iObj) ? Bac_ObjNameStr(p, iObj) : "" );
+    Vec_StrPrintStr( vStr, " (" );
+    Bac_BoxForEachBi( p, iObj, iTerm, k )
+    {
+        Vec_StrPrintStr( vStr, k ? ", ." : "." );
+        Vec_StrPrintStr( vStr, Mio_GateReadPinName(pGate, k) );
+        Vec_StrPrintStr( vStr, "(" );
+        Bac_ManWriteSig( p, iTerm );
+        Vec_StrPrintStr( vStr, ")" );
+    }
+    Bac_BoxForEachBo( p, iObj, iTerm, k )
+    {
+        Vec_StrPrintStr( vStr, Bac_BoxBiNum(p, iObj) ? ", ." : "." );
+        Vec_StrPrintStr( vStr, Mio_GateReadOutName(pGate) );
+        Vec_StrPrintStr( vStr, "(" );
+        Bac_ManWriteSig( p, iTerm );
+        Vec_StrPrintStr( vStr, ")" );
+    }
+    Vec_StrPrintStr( vStr, ");\n" );
+}
+static inline void Bac_ManWriteAssign( Bac_Ntk_t * p, int iObj )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut;
+    Bac_ObjType_t Type = Bac_ObjType(p, iObj);
+    int nInputs = Bac_BoxBiNum(p, iObj);
+    int nOutputs = Bac_BoxBoNum(p, iObj);
+    assert( nOutputs == 1 );
+    Vec_StrPrintStr( vStr, "  assign " );
+    Bac_ManWriteSig( p, iObj + 1 );
+    Vec_StrPrintStr( vStr, " = " );
+    if ( nInputs == 0 )
+    {
+        if ( Type == BAC_BOX_CF )
+            Vec_StrPrintStr( vStr, "1\'b0" );
+        else if ( Type == BAC_BOX_CT )
+            Vec_StrPrintStr( vStr, "1\'b1" );
+        else if ( Type == BAC_BOX_CX )
+            Vec_StrPrintStr( vStr, "1\'bx" );
+        else if ( Type == BAC_BOX_CZ )
+            Vec_StrPrintStr( vStr, "1\'bz" );
+        else assert( 0 );       
+    }
+    else if ( nInputs == 1 )
+    {
+        if ( Type == BAC_BOX_INV )
+            Vec_StrPrintStr( vStr, "~" );
+        else assert( Type == BAC_BOX_BUF );
+        Bac_ManWriteSig( p, iObj - 1 );
+    }
+    else if ( nInputs == 2 )
+    {
+        if ( Type == BAC_BOX_NAND || Type == BAC_BOX_NOR || Type == BAC_BOX_XNOR || Type == BAC_BOX_SHARPL )
+            Vec_StrPrintStr( vStr, "~" );
+        Bac_ManWriteSig( p, iObj - 1 );
+        if ( Type == BAC_BOX_AND || Type == BAC_BOX_SHARPL )
+            Vec_StrPrintStr( vStr, " & " );
+        else if ( Type == BAC_BOX_SHARP || Type == BAC_BOX_NOR )
+            Vec_StrPrintStr( vStr, " & ~" );
+        else if ( Type == BAC_BOX_OR )
+            Vec_StrPrintStr( vStr, " | " );
+        else if ( Type == BAC_BOX_NAND )
+            Vec_StrPrintStr( vStr, " | ~" );
+        else if ( Type == BAC_BOX_XOR || Type == BAC_BOX_XNOR )
+            Vec_StrPrintStr( vStr, " ^ " );
+        else assert( 0 );
+        Bac_ManWriteSig( p, iObj - 2 );
+    }
+    Vec_StrPrintStr( vStr, ";\n" );
+}
+void Bac_ManWriteVerilogBoxes( Bac_Ntk_t * p, int fUseAssign )
+{
+    Vec_Str_t * vStr = p->pDesign->vOut;
+    int iObj, k, i, o, StartPos;
+    Bac_NtkForEachBox( p, iObj ) // .subckt/.gate/box (formal/actual binding) 
+    {
+        // skip constants
+        if ( Bac_ObjIsConst(p, iObj) )
+            continue;
+        // write mapped
+        if ( Bac_ObjIsGate(p, iObj) )
+        {
+            Bac_ManWriteGate( p, iObj );
+            continue;
+        }
+        // write primitives as assign-statements
+        if ( !Bac_ObjIsBoxUser(p, iObj) && fUseAssign )
+        {
+            Bac_ManWriteAssign( p, iObj );
+            continue;
+        }
+        // write header
+        StartPos = Vec_StrSize(vStr);
+        if ( Bac_ObjIsBoxUser(p, iObj) )
+        {
+            int Value, Beg, End, Range;
+            Bac_Ntk_t * pModel = Bac_BoxNtk( p, iObj );
+            Vec_StrPrintStr( vStr, "  " );
+            Vec_StrPrintStr( vStr, Bac_NtkName(pModel) );
+            Vec_StrPrintStr( vStr, " " );
+            Vec_StrPrintStr( vStr, Bac_ObjName(p, iObj) ? Bac_ObjNameStr(p, iObj) : ""  );
+            Vec_StrPrintStr( vStr, " (" );
+            // write arguments
+            i = o = 0;
+            assert( Bac_NtkInfoNum(pModel) );
+            Vec_IntForEachEntryTriple( &pModel->vInfo, Value, Beg, End, k )
+            {
+                int NameId = Abc_Lit2Var2( Value );
+                int Type = Abc_Lit2Att2( Value );
+                Vec_StrPrintStr( vStr, k ? ", " : "" );
+                if ( Vec_StrSize(vStr) > StartPos + 70 )
+                {
+                    StartPos = Vec_StrSize(vStr);
+                    Vec_StrPrintStr( vStr, "\n    " );
+                }
+                Vec_StrPrintStr( vStr, "." );
+                Vec_StrPrintStr( vStr, Bac_NtkStr(p, NameId) );
+                Vec_StrPrintStr( vStr, "(" );
+                Range = Bac_InfoRange( Beg, End );
+                assert( Range > 0 );
+                if ( Type == 1 )
+                    Bac_ManWriteConcat( p, Bac_BoxBi(p, iObj, i), Range ), i += Range;
+                else if ( Type == 2 )
+                    Bac_ManWriteConcat( p, Bac_BoxBo(p, iObj, o), Range ), o += Range;
+                else assert( 0 );
+                Vec_StrPrintStr( vStr, ")" );
+            }
+            assert( i == Bac_BoxBiNum(p, iObj) );
+            assert( o == Bac_BoxBoNum(p, iObj) );
+        }
+        else
+        {
+            int iTerm, k, Range, iSig = 0;
+            Vec_Int_t * vBits = Bac_BoxCollectRanges( p, iObj );
+            char * pName = Bac_NtkGenerateName( p, Bac_ObjType(p, iObj), vBits );
+            char * pSymbs = Bac_ManPrimSymb( p->pDesign, Bac_ObjType(p, iObj) );
+            Vec_StrPrintStr( vStr, "  " );
+            Vec_StrPrintStr( vStr, pName );
+            Vec_StrPrintStr( vStr, " " );
+            Vec_StrPrintStr( vStr, Bac_ObjName(p, iObj) ? Bac_ObjNameStr(p, iObj) : ""  );
+            Vec_StrPrintStr( vStr, " (" );
+            // write inputs
+            Bac_BoxForEachBiMain( p, iObj, iTerm, k )
+            {
+                Range = Vec_IntEntry( vBits, iSig );
+                Vec_StrPrintStr( vStr, iSig ? ", " : "" );
+                if ( Vec_StrSize(vStr) > StartPos + 70 )
+                {
+                    StartPos = Vec_StrSize(vStr);
+                    Vec_StrPrintStr( vStr, "\n    " );
+                }
+                Vec_StrPrintStr( vStr, "." );
+                Vec_StrPush( vStr, pSymbs[iSig] );
+                Vec_StrPrintStr( vStr, "(" );
+                Bac_ManWriteConcat( p, iTerm, Range );
+                Vec_StrPrintStr( vStr, ")" );
+                iSig++;
+            }
+            Bac_BoxForEachBoMain( p, iObj, iTerm, k )
+            {
+                Range = Vec_IntEntry( vBits, iSig );
+                Vec_StrPrintStr( vStr, iSig ? ", " : "" );
+                if ( Vec_StrSize(vStr) > StartPos + 70 )
+                {
+                    StartPos = Vec_StrSize(vStr);
+                    Vec_StrPrintStr( vStr, "\n    " );
+                }
+                Vec_StrPrintStr( vStr, "." );
+                Vec_StrPush( vStr, pSymbs[iSig] );
+                Vec_StrPrintStr( vStr, "(" );
+                Bac_ManWriteConcat( p, iTerm, Range );
+                Vec_StrPrintStr( vStr, ")" );
+                iSig++;
+            }
+            assert( iSig == Vec_IntSize(vBits) );
+        }
+        Vec_StrPrintStr( vStr, ");\n" );
+    }
+}
+void Bac_ManWriteVerilogNtk( Bac_Ntk_t * p, int fUseAssign )
+{
+    char * pKeyword[4] = { "wire ", "input ", "output ", "inout " };
+    Vec_Str_t * vStr = p->pDesign->vOut;
+    int k, iObj, iTerm, Value, Beg, End, Length, fHaveWires, StartPos;
+//    assert( Bac_NtkInfoNum(p) );
+    assert( Vec_IntSize(&p->vFanin) == Bac_NtkObjNum(p) );
+//    Bac_NtkPrint( p );
+    // write header
+    Vec_StrPrintStr( vStr, "module " );
+    Vec_StrPrintStr( vStr, Bac_NtkName(p) );
+    Vec_StrPrintStr( vStr, " (\n    " );
+    StartPos = Vec_StrSize(vStr);
+    Vec_IntForEachEntryTriple( &p->vInfo, Value, Beg, End, k )
+    if ( Abc_Lit2Att2(Value) != 0 )
+    {
+        Vec_StrPrintStr( vStr, k ? ", " : "" );
+        if ( Vec_StrSize(vStr) > StartPos + 70 )
+        {
+            StartPos = Vec_StrSize(vStr);
+            Vec_StrPrintStr( vStr, "\n    " );
+        }
+        Bac_ManWriteVar( p, Abc_Lit2Var2(Value) );
+    }
+    Vec_StrPrintStr( vStr, "\n  );\n" );
+    // write inputs/outputs
+    Vec_IntForEachEntryTriple( &p->vInfo, Value, Beg, End, k )
+    if ( Abc_Lit2Att2(Value) != 0 )
+    {
+        Vec_StrPrintStr( vStr, "  " );
+        Vec_StrPrintStr( vStr, pKeyword[Abc_Lit2Att2(Value)] );
+        if ( Beg >= 0 )
+            Bac_ManWriteRange( p, Beg, End );
+        Bac_ManWriteVar( p, Abc_Lit2Var2(Value) );
+        Vec_StrPrintStr( vStr, ";\n" );
+    }
+    Vec_StrPrintStr( vStr, "\n" );
+    // write word-level wires
+    Bac_NtkForEachBox( p, iObj )
+    if ( !Bac_ObjIsConst(p, iObj) )
+        Bac_BoxForEachBo( p, iObj, iTerm, k )
+        if ( Bac_ObjNameType(p, iTerm) == BAC_NAME_WORD || Bac_ObjNameType(p, iTerm) == BAC_NAME_INFO )
+        {
+            Vec_StrPrintStr( vStr, "  wire " );
+            Bac_ManWriteRange( p, Bac_ManFindRealIndex(p, iTerm), Bac_ManFindRealIndex(p, iTerm + Bac_ObjGetRange(p, iTerm) - 1) );
+            Bac_ManWriteVar( p, Bac_ManFindRealNameId(p, iTerm) );
+            Vec_StrPrintStr( vStr, ";\n" );
+        }
+    // check if there are any wires left
+    fHaveWires = 0;
+    Bac_NtkForEachBox( p, iObj )
+    if ( !Bac_ObjIsConst(p, iObj) )
+        Bac_BoxForEachBo( p, iObj, iTerm, k )
+        if ( Bac_ObjNameType(p, iTerm) == BAC_NAME_BIN )
+        { fHaveWires = 1; iObj = Bac_NtkObjNum(p); break; }
+    // write bit-level wires
+    if ( fHaveWires )
+    {
+        Length = 7;
+        Vec_StrPrintStr( vStr, "\n  wire " );
+        Bac_NtkForEachBox( p, iObj )
+        if ( !Bac_ObjIsConst(p, iObj) )
+            Bac_BoxForEachBo( p, iObj, iTerm, k )
+            if ( Bac_ObjNameType(p, iTerm) == BAC_NAME_BIN )
+            {
+                if ( Length > 72 )
+                    Vec_StrPrintStr( vStr, ";\n  wire " ), Length = 7;
+                if ( Length > 7 )
+                    Vec_StrPrintStr( vStr, ", " );
+                Vec_StrPrintStr( vStr, Bac_ObjNameStr(p, iTerm) ); 
+                Length += strlen(Bac_ObjNameStr(p, iTerm));
+            }
+        Vec_StrPrintStr( vStr, ";\n" );
+    }
+    Vec_StrPrintStr( vStr, "\n" );
+    // write objects
+    Bac_ManWriteVerilogBoxes( p, fUseAssign );
+    Vec_StrPrintStr( vStr, "endmodule\n\n" );
+}
+void Bac_ManWriteVerilog( char * pFileName, Bac_Man_t * p, int fUseAssign )
+{
+    Bac_Ntk_t * pNtk; int i;
+    // check the library
+    if ( p->pMioLib && p->pMioLib != Abc_FrameReadLibGen() )
+    {
+        printf( "Genlib library used in the mapped design is not longer a current library.\n" );
+        return;
+    }
+    // derive the stream
+    p->vOut = Vec_StrAlloc( 10000 );
+    p->vOut2 = Vec_StrAlloc( 1000 );
+    Vec_StrPrintStr( p->vOut, "// Design \"" );
+    Vec_StrPrintStr( p->vOut, Bac_ManName(p) );
+    Vec_StrPrintStr( p->vOut, "\" written via CBA package in ABC on " );
+    Vec_StrPrintStr( p->vOut, Extra_TimeStamp() );
+    Vec_StrPrintStr( p->vOut, "\n\n" );
+    Bac_ManAssignInternWordNames( p );
+    Bac_ManForEachNtk( p, pNtk, i )
+        Bac_ManWriteVerilogNtk( pNtk, fUseAssign );
+    // dump into file
+    if ( p->vOut && Vec_StrSize(p->vOut) > 0 )
+    {
+        FILE * pFile = fopen( pFileName, "wb" );
+        if ( pFile == NULL )
+            printf( "Cannot open file \"%s\" for writing.\n", pFileName );
+        else
+        {
+            fwrite( Vec_StrArray(p->vOut), 1, Vec_StrSize(p->vOut), pFile );
+            fclose( pFile );
+        }
+    }
+    Vec_StrFreeP( &p->vOut );
+    Vec_StrFreeP( &p->vOut2 );
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/base/bac/module.make b/src/base/bac/module.make
new file mode 100644
index 00000000..c0b81045
--- /dev/null
+++ b/src/base/bac/module.make
@@ -0,0 +1,15 @@
+SRC +=    src/base/bac/bacBlast.c \
+    src/base/bac/bacBac.c \
+    src/base/bac/bacCom.c \
+    src/base/bac/bacLib.c \
+    src/base/bac/bacNtk.c \
+    src/base/bac/bacPrsBuild.c \
+    src/base/bac/bacPrsTrans.c \
+    src/base/bac/bacPtr.c \
+    src/base/bac/bacPtrAbc.c \
+    src/base/bac/bacReadBlif.c \
+    src/base/bac/bacReadSmt.c \
+    src/base/bac/bacReadVer.c \
+    src/base/bac/bacWriteBlif.c \
+    src/base/bac/bacWriteSmt.c \
+    src/base/bac/bacWriteVer.c 
diff --git a/src/base/cba/cba.h b/src/base/cba/cba.h
index 20b4a7b1..d36c75af 100644
--- a/src/base/cba/cba.h
+++ b/src/base/cba/cba.h
@@ -606,7 +606,7 @@ static inline Cba_Ntk_t * Cba_NtkDupOrder( Cba_Man_t * pMan, Cba_Ntk_t * p, Vec_
     Vec_IntFree( vObjs );
     return pNew;
 }
-static inline Cba_Ntk_t * Cba_NtkDupAttrs( Cba_Ntk_t * pNew, Cba_Ntk_t * p )
+static inline void Cba_NtkDupAttrs( Cba_Ntk_t * pNew, Cba_Ntk_t * p )
 {
     // transfer object attributes
     Vec_IntRemapArray( &p->vObjCopy, &p->vObjFunc,  &pNew->vObjFunc,  Cba_NtkObjNum(pNew) + 1 );
diff --git a/src/base/cba/cbaPrsTrans.c b/src/base/cba/cbaPrsTrans.c
deleted file mode 100644
index 02cb4403..00000000
--- a/src/base/cba/cbaPrsTrans.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/**CFile****************************************************************
-
-  FileName    [cbaPrsTrans.c]
-
-  SystemName  [ABC: Logic synthesis and verification system.]
-
-  PackageName [Hierarchical word-level netlist.]
-
-  Synopsis    [Parse tree to netlist transformation.]
-
-  Author      [Alan Mishchenko]
-  
-  Affiliation [UC Berkeley]
-
-  Date        [Ver. 1.0. Started - November 29, 2014.]
-
-  Revision    [$Id: cbaPrsTrans.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
-
-***********************************************************************/
-
-#include "cba.h"
-#include "cbaPrs.h"
-
-ABC_NAMESPACE_IMPL_START
-
-////////////////////////////////////////////////////////////////////////
-///                        DECLARATIONS                              ///
-////////////////////////////////////////////////////////////////////////
-
-typedef struct Cba_Trip_t_ Cba_Trip_t;
-struct Cba_Trip_t_
-{
-    Cba_ObjType_t Type;
-    char *        pName;
-    char *        pCode;
-    char *        pSigs[6];
-};
-/*
-static Cba_Trip_t s_Types[100] =
-{ 
-    { CBA_BOX_CT       , "VERIFIC_PWR",           "1",      {"o"} },
-    { CBA_BOX_CF       , "VERIFIC_GND",           "1",      {"o"} },
-    { CBA_BOX_CX       , "VERIFIC_X",             "1",      {"o"} },
-    { CBA_BOX_CZ       , "VERIFIC_Z",             "1",      {"o"} },
-    { CBA_BOX_INV      , "VERIFIC_INV",           "11",     {"i","o"} },
-    { CBA_BOX_BUF      , "VERIFIC_BUF",           "11",     {"i","o"} },
-    { CBA_BOX_AND      , "VERIFIC_AND",           "111",    {"a0","a1","o"} },
-    { CBA_BOX_NAND     , "VERIFIC_NAND",          "111",    {"a0","a1","o"} },
-    { CBA_BOX_OR       , "VERIFIC_OR",            "111",    {"a0","a1","o"} },
-    { CBA_BOX_NOR      , "VERIFIC_NOR",           "111",    {"a0","a1","o"} },
-    { CBA_BOX_XOR      , "VERIFIC_XOR",           "111",    {"a0","a1","o"} },
-    { CBA_BOX_XNOR     , "VERIFIC_XNOR",          "111",    {"a0","a1","o"} },
-    { CBA_BOX_MUX      , "VERIFIC_MUX",           "1111",   {"c","a1","a0","o"} },                        // changed order
-    { (Cba_ObjType_t)-1, "VERIFIC_PULLUP",        "1",      {"o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_PULLDOWN",      "1",      {"o"} },
-    { CBA_BOX_TRI      , "VERIFIC_TRI",           "111",    {"i","c","o"} },
-    { CBA_BOX_LATCH    , "VERIFIC_DLATCH",        "11111",  {"d","async_val","async_cond","gate","q"} },  // changed order
-    { CBA_BOX_LATCHRS  , "VERIFIC_DLATCHRS",      "11111",  {"d","s","r","gate","q"} },                   // changed order
-    { CBA_BOX_DFF      , "VERIFIC_DFF",           "11111",  {"d","async_val","async_cond","clk","q"} },   // changed order
-    { CBA_BOX_DFFRS    , "VERIFIC_DFFRS",         "11111",  {"d","s","r","clk","q"} },                    // changed order
-    { (Cba_ObjType_t)-1, "VERIFIC_NMOS",          "111",    {"c","d","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_PMOS",          "111",    {"c","d","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_CMOS",          "1111",   {"d","nc","pc","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_TRAN",          "111",    {"inout1","inout2","control"} },
-    { CBA_BOX_ADD      , "VERIFIC_FADD",          "11111",  {"cin","a","b","o","cout"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_RCMOS",         "1111",   {"d","nc","pc","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_RNMOS",         "111",    {"c","d","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_RPMOS",         "111",    {"c","d","o"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_RTRAN",         "111",    {"inout1","inout2","control"} },
-    { (Cba_ObjType_t)-1, "VERIFIC_HDL_ASSERTION", "1",      {"condition"} },
-    { CBA_BOX_ADD      , "add_",                  "1aba1",  {"cin","a","b","o","cout"} },
-    { CBA_BOX_MUL      , "mult_",                 "ab?",    {"a","b","o"} },            // ? = a * b
-    { CBA_BOX_DIV      , "div_",                  "ab?",    {"a","b","o"} },            // ? = 
-    { CBA_BOX_MOD      , "mod_",                  "ab?",    {"a","b","o"} },            // ? =
-    { CBA_BOX_REM      , "rem_",                  "ab?",    {"a","b","o"} },            // ? =
-    { CBA_BOX_SHIL     , "shift_left_",           "1aba",   {"cin","a","amount","o"} },
-    { CBA_BOX_SHIR     , "shift_right_",          "1aba",   {"cin","a","amount","o"} },
-    { CBA_BOX_ROTL     , "rotate_left_",          "aba",    {"a","amount","o"} },
-    { CBA_BOX_ROTR     , "rotate_right_",         "aba",    {"a","amount","o"} },
-    { CBA_BOX_RAND     , "reduce_and_",           "ab1",    {"a","o"} },
-    { CBA_BOX_ROR      , "reduce_or_",            "ab1",    {"a","o"} },
-    { CBA_BOX_RXOR     , "reduce_xor_",           "ab1",    {"a","o"} },
-    { CBA_BOX_RNAND    , "reduce_nand_",          "ab1",    {"a","o"} },
-    { CBA_BOX_RNOR     , "reduce_nor_",           "ab1",    {"a","o"} },
-    { CBA_BOX_RXNOR    , "reduce_xnor_",          "ab1",    {"a","o"} },
-    { CBA_BOX_LTHAN    , "LessThan_",             "1ab1",   {"cin","a","b","o"} },
-    { CBA_BOX_NMUX     , "Mux_",                  "ab1",    {"sel","data","o"} },       
-    { CBA_BOX_SEL      , "Select_",               "aaa",    {"sel","data","o"} },
-    { CBA_BOX_DEC      , "Decoder_",              "a?",     {"a","o"} },                // ? = (1 << a)
-    { CBA_BOX_EDEC     , "EnabledDecoder_",       "1a?",    {"en","i","o"} },           // ? = (1 << a)
-    { CBA_BOX_PSEL     , "PrioSelect_",           "1aaa",   {"cin","sel","data","o"} },
-    { CBA_BOX_RAM      , "DualPortRam_",          "1abab",  {"write_enable","write_address","write_data","read_address","read_data"} },
-    { CBA_BOX_RAMR     , "ReadPort_",             "1a1b",   {"read_enable", "read_address", "RAM", "read_data" } },
-    { CBA_BOX_RAMW     , "WritePort_",            "1ab1",   {"write_enable","write_address","write_data", "RAM"} },
-    { CBA_BOX_RAMWC    , "ClockedWritePort_",     "11ab1",  {"clk","write_enable","write_address","write_data", "RAM"} },
-    { CBA_BOX_LUT      , "lut",                   "?",      {"i","o"} },
-    { CBA_BOX_AND      , "and_",                  "aaa",    {"a","b","o"} },
-    { CBA_BOX_OR       , "or_",                   "aaa",    {"a","b","o"} },
-    { CBA_BOX_XOR      , "xor_",                  "aaa",    {"a","b","o"} },
-    { CBA_BOX_NAND     , "nand_",                 "aaa",    {"a","b","o"} },
-    { CBA_BOX_NOR      , "nor_",                  "aaa",    {"a","b","o"} },
-    { CBA_BOX_XNOR     , "xnor_",                 "aaa",    {"a","b","o"} },
-    { CBA_BOX_BUF      , "buf_",                  "aa",     {"i","o"} },
-    { CBA_BOX_INV      , "inv_",                  "aa",     {"i","o"} },
-    { CBA_BOX_TRI      , "tri_",                  "a1a",    {"i","c","o"} },
-    { CBA_BOX_SUB      , "sub_",                  "aaa",    {"a","b","o"} },
-    { CBA_BOX_MIN      , "unary_minus_",          "aa",     {"i","o"} },
-    { CBA_BOX_EQU      , "equal_",                "aa1",    {"a","b","o"} },
-    { CBA_BOX_NEQU     , "not_equal_",            "aa1",    {"a","b","o"} },
-    { CBA_BOX_MUX      , "mux_",                  "1aaa",   {"cond","d1","d0","o"} },                       // changed order
-    { CBA_BOX_NMUX     , "wide_mux_",             "ab?",    {"sel","data","o"} },             // ? = b / (1 << a)
-    { CBA_BOX_SEL      , "wide_select_",          "ab?",    {"sel","data","o"} },             // ? = b / a
-    { CBA_BOX_DFF      , "wide_dff_",             "aaa1a",  {"d","async_val","async_cond","clock","q"} },
-    { CBA_BOX_DFFRS    , "wide_dlatch_",          "aaa1a",  {"d","set","reset","clock","q"} },           
-    { CBA_BOX_LATCHRS  , "wide_dffrs_",           "aaa1a",  {"d","set","reset","clock","q"} },           
-    { CBA_BOX_LATCH    , "wide_dlatchrs_",        "aaa1a",  {"d","async_val","async_cond","clock","q"} },
-    { CBA_BOX_PSEL     , "wide_prio_select_",     "ab??",   {"sel","data","carry_in","o"} },  // ? = b / a
-    { CBA_BOX_POW      , "pow_",                  "abc",    {"a","b","o"} },                  // ? = 
-    { CBA_BOX_PENC     , "PrioEncoder_",          "a?",     {"sel","o"} },
-    { CBA_BOX_ABS      , "abs",                   "aa",     {"i","o"} }
-};
-*/
-
-////////////////////////////////////////////////////////////////////////
-///                     FUNCTION DEFINITIONS                         ///
-////////////////////////////////////////////////////////////////////////
-
-/**Function*************************************************************
-
-  Synopsis    [Count range size.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-static inline int Prs_ManRangeSizeName( Prs_Ntk_t * p, int Name )
-{
-    return 1;
-}
-static inline int Prs_ManRangeSizeRange( Prs_Ntk_t * p, int Range )
-{
-    char * pStr; 
-    int Left, Right;
-    if ( Range == 0 ) 
-        return 1;
-    pStr = Prs_NtkStr( p, Range );
-    assert( pStr[0] == '[' );
-    Left = Right = atoi( pStr + 1 );
-    pStr = strstr( pStr, "=" );
-    if ( pStr )
-        Right = atoi( pStr + 1 );
-    return 1 + (Left > Right ? Left - Right : Right - Left);
-}
-static inline int Prs_ManRangeSizeConst( Prs_Ntk_t * p, int Const )
-{
-    return atoi( Prs_NtkStr(p, Const) );
-}
-static inline int Prs_ManRangeSizeConcat( Prs_Ntk_t * p, int Con )
-{
-    extern int Prs_ManRangeSizeArray( Prs_Ntk_t * p, Vec_Int_t * vSlices, int Start, int Stop );
-    Vec_Int_t * vSigs = Prs_CatSignals(p, Con);
-    return Prs_ManRangeSizeArray( p, vSigs, 0, Vec_IntSize(vSigs) );
-}
-static inline int Prs_ManRangeSizeSignal( Prs_Ntk_t * p, int Sig )
-{
-    int Value = Abc_Lit2Var2( Sig );
-    Prs_ManType_t Type = (Prs_ManType_t)Abc_Lit2Att2( Sig );
-    if ( Type == CBA_PRS_NAME )
-        return Prs_ManRangeSizeName( p, Value );
-    if ( Type == CBA_PRS_SLICE )
-        return Prs_ManRangeSizeRange( p, Prs_SliceRange(p, Value) );
-    if ( Type == CBA_PRS_CONST )
-        return Prs_ManRangeSizeConst( p, Value );
-    if ( Type == CBA_PRS_CONCAT )
-        return Prs_ManRangeSizeConcat( p, Value );
-    assert( 0 );
-    return 0;
-}
-int Prs_ManRangeSizeArray( Prs_Ntk_t * p, Vec_Int_t * vSlices, int Start, int Stop )
-{
-    int i, Sig, Count = 0;
-    assert( Vec_IntSize(vSlices) > 0 );
-    Vec_IntForEachEntryStartStop( vSlices, Sig, i, Start, Stop )
-        Count += Prs_ManRangeSizeSignal( p, Sig );
-    return Count;
-}
-
-
-/**Function*************************************************************
-
-  Synopsis    []
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-
-
-////////////////////////////////////////////////////////////////////////
-///                       END OF FILE                                ///
-////////////////////////////////////////////////////////////////////////
-
-
-ABC_NAMESPACE_IMPL_END
-
diff --git a/src/base/cba/cbaReadVer.c b/src/base/cba/cbaReadVer.c
index ed825ba1..67a7c3b7 100644
--- a/src/base/cba/cbaReadVer.c
+++ b/src/base/cba/cbaReadVer.c
@@ -447,7 +447,7 @@ static inline int Prs_ManReadSignal( Prs_Man_t * p )
         return Abc_Var2Lit2( Item, CBA_PRS_NAME );
     }
 }
-static int Prs_ManReadSignalList( Prs_Man_t * p, Vec_Int_t * vTemp, char LastSymb, int fAddForm )
+int Prs_ManReadSignalList( Prs_Man_t * p, Vec_Int_t * vTemp, char LastSymb, int fAddForm )
 {
     Vec_IntClear( vTemp );
     while ( 1 )