Version abc80130

1 files changed, 99 insertions, 1097 deletions

diff --git a/src/base/abci/abcDar.c b/src/base/abci/abcDar.c
index 42ac528b..39f58a4e 100644
--- a/src/base/abci/abcDar.c
+++ b/src/base/abci/abcDar.c
@@ -22,13 +22,16 @@
 #include "aig.h"
 #include "dar.h"
 #include "cnf.h"
-#include "fra.h"
-#include "fraig.h"
+//#include "fra.h"
+//#include "fraig.h"
 
 ////////////////////////////////////////////////////////////////////////
 ///                        DECLARATIONS                              ///
 ////////////////////////////////////////////////////////////////////////
 
+#define Vec_PtrForEachEntryStop( vVec, pEntry, i, Stop )                                     \
+    for ( i = 0; (i < Stop) && (((pEntry) = Vec_PtrEntry(vVec, i)), 1); i++ )
+
 ////////////////////////////////////////////////////////////////////////
 ///                     FUNCTION DEFINITIONS                         ///
 ////////////////////////////////////////////////////////////////////////
@@ -53,25 +56,6 @@ Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fRegisters )
     // make sure the latches follow PIs/POs
     if ( fRegisters ) 
     { 
-        assert( Abc_NtkBoxNum(pNtk) == Abc_NtkLatchNum(pNtk) );
-        Abc_NtkForEachCi( pNtk, pObj, i )
-            if ( i < Abc_NtkPiNum(pNtk) )
-            {
-                assert( Abc_ObjIsPi(pObj) );
-                if ( !Abc_ObjIsPi(pObj) )
-                    printf( "Abc_NtkToDar(): Temporary bug: The PI ordering is wrong!\n" );
-            }
-            else
-                assert( Abc_ObjIsBo(pObj) );
-        Abc_NtkForEachCo( pNtk, pObj, i )
-            if ( i < Abc_NtkPoNum(pNtk) )
-            {
-                assert( Abc_ObjIsPo(pObj) );
-                if ( !Abc_ObjIsPo(pObj) )
-                    printf( "Abc_NtkToDar(): Temporary bug: The PO ordering is wrong!\n" );
-            }
-            else
-                assert( Abc_ObjIsBi(pObj) );
         // print warning about initial values
         nDontCares = 0;
         Abc_NtkForEachLatch( pNtk, pObj, i )
@@ -90,7 +74,7 @@ Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fRegisters )
     }
     // create the manager
     pMan = Aig_ManStart( Abc_NtkNodeNum(pNtk) + 100 );
-    pMan->pName = Extra_UtilStrsav( pNtk->pName );
+    pMan->pName = util_strsav( pNtk->pName );
     // save the number of registers
     if ( fRegisters )
     {
@@ -99,7 +83,7 @@ Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fRegisters )
         pMan->vFlopNums = NULL;
     }
     // transfer the pointers to the basic nodes
-    Abc_AigConst1(pNtk)->pCopy = (Abc_Obj_t *)Aig_ManConst1(pMan);
+    Abc_AigConst1(pNtk->pManFunc)->pCopy = (Abc_Obj_t *)Aig_ManConst1(pMan);
     Abc_NtkForEachCi( pNtk, pObj, i )
         pObj->pCopy = (Abc_Obj_t *)Aig_ObjCreatePi(pMan);
     // complement the 1-values registers
@@ -111,6 +95,8 @@ Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fRegisters )
 //    pMan->fAddStrash = 1;
     Abc_NtkForEachNode( pNtk, pObj, i )
     {
+        if ( Abc_ObjFaninNum(pObj) == 0 )
+            continue;
         pObj->pCopy = (Abc_Obj_t *)Aig_And( pMan, (Aig_Obj_t *)Abc_ObjChild0Copy(pObj), (Aig_Obj_t *)Abc_ObjChild1Copy(pObj) );
 //        printf( "%d->%d ", pObj->Id, ((Aig_Obj_t *)pObj->pCopy)->Id );
     }
@@ -121,7 +107,8 @@ Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fRegisters )
     // complement the 1-valued registers
     if ( fRegisters )
         Aig_ManForEachLiSeq( pMan, pObjNew, i )
-            if ( Abc_LatchIsInit1(Abc_ObjFanout0(Abc_NtkCo(pNtk,i))) )
+//            if ( Abc_LatchIsInit1(Abc_ObjFanout0(Abc_NtkCo(pNtk,i))) )
+            if ( Abc_LatchIsInit1(Abc_NtkCo(pNtk,i)) )
                 pObjNew->pFanin0 = Aig_Not(pObjNew->pFanin0);
     // remove dangling nodes
     if ( nNodes = Aig_ManCleanup( pMan ) )
@@ -151,14 +138,14 @@ Abc_Ntk_t * Abc_NtkFromDar( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
 {
     Vec_Ptr_t * vNodes;
     Abc_Ntk_t * pNtkNew;
-    Abc_Obj_t * pObjNew;
+//    Abc_Obj_t * pObjNew;
     Aig_Obj_t * pObj;
     int i;
 //    assert( Aig_ManRegNum(pMan) == Abc_NtkLatchNum(pNtkOld) );
     // perform strashing
-    pNtkNew = Abc_NtkStartFrom( pNtkOld, ABC_NTK_STRASH, ABC_FUNC_AIG );
+    pNtkNew = Abc_NtkStartFrom( pNtkOld, ABC_TYPE_STRASH, ABC_FUNC_AIG );
     // transfer the pointers to the basic nodes
-    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew);
+    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew->pManFunc);
     Aig_ManForEachPi( pMan, pObj, i )
         pObj->pData = Abc_NtkCi(pNtkNew, i);
     // rebuild the AIG
@@ -176,6 +163,7 @@ Abc_Ntk_t * Abc_NtkFromDar( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
             break;
         Abc_ObjAddFanin( Abc_NtkCo(pNtkNew, i), (Abc_Obj_t *)Aig_ObjChild0Copy(pObj) );
     }
+/*
     // if there are assertions, add them
     if ( pMan->nAsserts > 0 )
         Aig_ManForEachAssert( pMan, pObj, i )
@@ -184,6 +172,7 @@ Abc_Ntk_t * Abc_NtkFromDar( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
             Abc_ObjAssignName( pObjNew, "assert_", Abc_ObjName(pObjNew) );
             Abc_ObjAddFanin( pObjNew, (Abc_Obj_t *)Aig_ObjChild0Copy(pObj) );
         }
+*/
     if ( !Abc_NtkCheck( pNtkNew ) )
         fprintf( stdout, "Abc_NtkFromDar(): Network check has failed.\n" );
     return pNtkNew;
@@ -191,6 +180,30 @@ Abc_Ntk_t * Abc_NtkFromDar( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
 
 /**Function*************************************************************
 
+  Synopsis    [Adds dummy names.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Abc_NtkAddDummyLatchNames( Abc_Ntk_t * pNtk )
+{
+    char Buffer[100];
+    Abc_Obj_t * pObj;
+    int nDigits, i;
+    nDigits = Extra_Base10Log( Abc_NtkLatchNum(pNtk) );
+    Abc_NtkForEachLatch( pNtk, pObj, i )
+    {
+        sprintf( Buffer, "L%0*d", nDigits, i );
+        Abc_NtkLogicStoreName( pObj, Buffer );
+    }
+}
+
+/**Function*************************************************************
+
   Synopsis    [Converts the network from the AIG manager into ABC.]
 
   Description [This procedure should be called after seq sweeping, 
@@ -204,52 +217,38 @@ Abc_Ntk_t * Abc_NtkFromDar( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
 Abc_Ntk_t * Abc_NtkFromDarSeqSweep( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
 {
     Vec_Ptr_t * vNodes;
-    Abc_Ntk_t * pNtkNew;
-    Abc_Obj_t * pObjNew, * pLatch;
+    Abc_Ntk_t * pNtkNew; 
+    Abc_Obj_t * pObjOld, * pObjNew;
     Aig_Obj_t * pObj, * pObjLo, * pObjLi;
-    int i, iNodeId;
-//    assert( Aig_ManRegNum(pMan) != Abc_NtkLatchNum(pNtkOld) );
-    // perform strashing
-    pNtkNew = Abc_NtkStartFromNoLatches( pNtkOld, ABC_NTK_STRASH, ABC_FUNC_AIG );
-    // consider the case of target enlargement
-    if ( Abc_NtkCiNum(pNtkNew) < Aig_ManPiNum(pMan) - Aig_ManRegNum(pMan) )
+    int i;
+    // start the network
+    pNtkNew = Abc_NtkAlloc( ABC_TYPE_STRASH, ABC_FUNC_AIG );
+    // duplicate the name and the spec
+    pNtkNew->pName = util_strsav(pNtkOld->pName);
+    pNtkNew->pSpec = util_strsav(pNtkOld->pSpec);
+    // create PIs/POs/latches
+    Abc_NtkForEachPi( pNtkOld, pObjOld, i )
     {
-        for ( i = Aig_ManPiNum(pMan) - Aig_ManRegNum(pMan) - Abc_NtkCiNum(pNtkNew); i > 0; i-- )
-        {
-            pObjNew = Abc_NtkCreatePi( pNtkNew );
-            Abc_ObjAssignName( pObjNew, Abc_ObjName(pObjNew), NULL );
-        }
-        Abc_NtkOrderCisCos( pNtkNew );
+        pObjNew = Abc_NtkDupObj( pNtkNew, pObjOld );
+        Abc_NtkLogicStoreName( pObjNew, Abc_ObjName(pObjOld) );
+    }
+    Abc_NtkForEachPo( pNtkOld, pObjOld, i )
+    {
+        pObjNew = Abc_NtkDupObj( pNtkNew, pObjOld );
+        Abc_NtkLogicStoreName( pObjNew, Abc_ObjName(pObjOld) );
     }
-    assert( Abc_NtkCiNum(pNtkNew) == Aig_ManPiNum(pMan) - Aig_ManRegNum(pMan) );
-    assert( Abc_NtkCoNum(pNtkNew) == Aig_ManPoNum(pMan) - Aig_ManRegNum(pMan) );
-    // transfer the pointers to the basic nodes
-    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew);
-    Aig_ManForEachPiSeq( pMan, pObj, i )
-        pObj->pData = Abc_NtkCi(pNtkNew, i);
-    // create as many latches as there are registers in the manager
     Aig_ManForEachLiLoSeq( pMan, pObjLi, pObjLo, i )
     {
         pObjNew = Abc_NtkCreateLatch( pNtkNew );
-        pObjLi->pData = Abc_NtkCreateBi( pNtkNew );
-        pObjLo->pData = Abc_NtkCreateBo( pNtkNew );
-        Abc_ObjAddFanin( pObjNew, pObjLi->pData );
-        Abc_ObjAddFanin( pObjLo->pData, pObjNew );
+        Vec_PtrPush( pNtkNew->vCis, pObjNew );
+        Vec_PtrPush( pNtkNew->vCos, pObjNew );
         Abc_LatchSetInit0( pObjNew );
     }
-    if ( pMan->vFlopNums == NULL )
-        Abc_NtkAddDummyBoxNames( pNtkNew );
-    else
-    {
-        assert( Abc_NtkBoxNum(pNtkOld) == Abc_NtkLatchNum(pNtkOld) );
-        Abc_NtkForEachLatch( pNtkNew, pObjNew, i )
-        {
-            pLatch = Abc_NtkBox( pNtkOld, Vec_IntEntry( pMan->vFlopNums, i ) );
-            Abc_ObjAssignName( pObjNew, Abc_ObjName(pLatch), NULL );
-            Abc_ObjAssignName( Abc_ObjFanin0(pObjNew),  Abc_ObjName(Abc_ObjFanin0(pLatch)), NULL );
-            Abc_ObjAssignName( Abc_ObjFanout0(pObjNew), Abc_ObjName(Abc_ObjFanout0(pLatch)), NULL );
-        }
-    }
+    Abc_NtkAddDummyLatchNames( pNtkNew );
+    // transfer the pointers to the basic nodes
+    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew->pManFunc);
+    Aig_ManForEachPi( pMan, pObj, i )
+        pObj->pData = Abc_NtkCi(pNtkNew, i);
     // rebuild the AIG
     vNodes = Aig_ManDfs( pMan );
     Vec_PtrForEachEntry( vNodes, pObj, i )
@@ -261,23 +260,9 @@ Abc_Ntk_t * Abc_NtkFromDarSeqSweep( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
     // connect the PO nodes
     Aig_ManForEachPo( pMan, pObj, i )
     {
-        if ( pMan->nAsserts && i == Aig_ManPoNum(pMan) - pMan->nAsserts )
-            break;
-        iNodeId = Nm_ManFindIdByNameTwoTypes( pNtkNew->pManName, Abc_ObjName(Abc_NtkCo(pNtkNew, i)), ABC_OBJ_PI, ABC_OBJ_BO );
-        if ( iNodeId >= 0 )
-            pObjNew = Abc_NtkObj( pNtkNew, iNodeId );
-        else
-            pObjNew = (Abc_Obj_t *)Aig_ObjChild0Copy(pObj);
+        pObjNew = (Abc_Obj_t *)Aig_ObjChild0Copy(pObj);
         Abc_ObjAddFanin( Abc_NtkCo(pNtkNew, i), pObjNew );
     }
-    // if there are assertions, add them
-    if ( pMan->nAsserts > 0 )
-        Aig_ManForEachAssert( pMan, pObj, i )
-        {
-            pObjNew = Abc_NtkCreateAssert(pNtkNew);
-            Abc_ObjAssignName( pObjNew, "assert_", Abc_ObjName(pObjNew) );
-            Abc_ObjAddFanin( pObjNew, (Abc_Obj_t *)Aig_ObjChild0Copy(pObj) );
-        }
     if ( !Abc_NtkCheck( pNtkNew ) )
         fprintf( stdout, "Abc_NtkFromDar(): Network check has failed.\n" );
     return pNtkNew;
@@ -303,9 +288,9 @@ Abc_Ntk_t * Abc_NtkFromDarChoices( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
     assert( pMan->pEquivs != NULL );
     assert( Aig_ManBufNum(pMan) == 0 );
     // perform strashing
-    pNtkNew = Abc_NtkStartFrom( pNtkOld, ABC_NTK_STRASH, ABC_FUNC_AIG );
+    pNtkNew = Abc_NtkStartFrom( pNtkOld, ABC_TYPE_STRASH, ABC_FUNC_AIG );
     // transfer the pointers to the basic nodes
-    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew);
+    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew->pManFunc);
     Aig_ManForEachPi( pMan, pObj, i )
         pObj->pData = Abc_NtkCi(pNtkNew, i);
 
@@ -336,154 +321,6 @@ Abc_Ntk_t * Abc_NtkFromDarChoices( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
 
 /**Function*************************************************************
 
-  Synopsis    [Converts the network from the AIG manager into ABC.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkFromDarSeq( Abc_Ntk_t * pNtkOld, Aig_Man_t * pMan )
-{
-    Vec_Ptr_t * vNodes;
-    Abc_Ntk_t * pNtkNew;
-    Abc_Obj_t * pObjNew, * pFaninNew, * pFaninNew0, * pFaninNew1;
-    Aig_Obj_t * pObj;
-    int i;
-//    assert( Aig_ManLatchNum(pMan) > 0 );
-    // perform strashing
-    pNtkNew = Abc_NtkStartFromNoLatches( pNtkOld, ABC_NTK_STRASH, ABC_FUNC_AIG );
-    // transfer the pointers to the basic nodes
-    Aig_ManConst1(pMan)->pData = Abc_AigConst1(pNtkNew);
-    Aig_ManForEachPi( pMan, pObj, i )
-        pObj->pData = Abc_NtkPi(pNtkNew, i);
-    // create latches of the new network
-    Aig_ManForEachObj( pMan, pObj, i )
-    {
-        if ( !Aig_ObjIsLatch(pObj) )
-            continue;
-        pObjNew = Abc_NtkCreateLatch( pNtkNew );
-        pFaninNew0 = Abc_NtkCreateBi( pNtkNew );
-        pFaninNew1 = Abc_NtkCreateBo( pNtkNew );
-        Abc_ObjAddFanin( pObjNew, pFaninNew0 );
-        Abc_ObjAddFanin( pFaninNew1, pObjNew );
-        Abc_LatchSetInit0( pObjNew );
-        pObj->pData = Abc_ObjFanout0( pObjNew );
-    }
-    Abc_NtkAddDummyBoxNames( pNtkNew );
-    // rebuild the AIG
-    vNodes = Aig_ManDfs( pMan );
-    Vec_PtrForEachEntry( vNodes, pObj, i )
-    {
-        // add the first fanin
-        pObj->pData = pFaninNew0 = (Abc_Obj_t *)Aig_ObjChild0Copy(pObj);
-        if ( Aig_ObjIsBuf(pObj) )
-            continue;
-        // add the second fanin
-        pFaninNew1 = (Abc_Obj_t *)Aig_ObjChild1Copy(pObj);
-        // create the new node
-        if ( Aig_ObjIsExor(pObj) )
-            pObj->pData = pObjNew = Abc_AigXor( pNtkNew->pManFunc, pFaninNew0, pFaninNew1 );
-        else
-            pObj->pData = pObjNew = Abc_AigAnd( pNtkNew->pManFunc, pFaninNew0, pFaninNew1 );
-    }
-    Vec_PtrFree( vNodes );
-    // connect the PO nodes
-    Aig_ManForEachPo( pMan, pObj, i )
-    {
-        pFaninNew = (Abc_Obj_t *)Aig_ObjChild0Copy( pObj );
-        Abc_ObjAddFanin( Abc_NtkPo(pNtkNew, i), pFaninNew );
-    }
-    // connect the latches
-    Aig_ManForEachObj( pMan, pObj, i )
-    {
-        if ( !Aig_ObjIsLatch(pObj) )
-            continue;
-        pFaninNew = (Abc_Obj_t *)Aig_ObjChild0Copy( pObj );
-        Abc_ObjAddFanin( Abc_ObjFanin0(Abc_ObjFanin0(pObj->pData)), pFaninNew );
-    }
-    if ( !Abc_NtkCheck( pNtkNew ) )
-        fprintf( stdout, "Abc_NtkFromIvySeq(): Network check has failed.\n" );
-    return pNtkNew;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Collect latch values.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Vec_Int_t * Abc_NtkGetLatchValues( Abc_Ntk_t * pNtk )
-{
-    Vec_Int_t * vInits;
-    Abc_Obj_t * pLatch;
-    int i;
-    vInits = Vec_IntAlloc( Abc_NtkLatchNum(pNtk) );
-    Abc_NtkForEachLatch( pNtk, pLatch, i )
-    {
-        assert( Abc_LatchIsInit1(pLatch) == 0 );
-        Vec_IntPush( vInits, Abc_LatchIsInit1(pLatch) );
-    }
-    return vInits;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Performs verification after retiming.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Abc_NtkSecRetime( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2 )
-{
-    int fRemove1, fRemove2;
-    Aig_Man_t * pMan1, * pMan2;
-    int * pArray;
-
-    fRemove1 = (!Abc_NtkIsStrash(pNtk1)) && (pNtk1 = Abc_NtkStrash(pNtk1, 0, 0, 0));
-    fRemove2 = (!Abc_NtkIsStrash(pNtk2)) && (pNtk2 = Abc_NtkStrash(pNtk2, 0, 0, 0));
-
-
-    pMan1 = Abc_NtkToDar( pNtk1, 0 );
-    pMan2 = Abc_NtkToDar( pNtk2, 0 );
-
-    Aig_ManPrintStats( pMan1 );
-    Aig_ManPrintStats( pMan2 );
-
-//    pArray = Abc_NtkGetLatchValues(pNtk1);
-    pArray = NULL;
-    Aig_ManSeqStrash( pMan1, Abc_NtkLatchNum(pNtk1), pArray );
-    free( pArray );
-
-//    pArray = Abc_NtkGetLatchValues(pNtk2);
-    pArray = NULL;
-    Aig_ManSeqStrash( pMan2, Abc_NtkLatchNum(pNtk2), pArray );
-    free( pArray );
-
-    Aig_ManPrintStats( pMan1 );
-    Aig_ManPrintStats( pMan2 );
-
-    Aig_ManStop( pMan1 );
-    Aig_ManStop( pMan2 );
-
-
-    if ( fRemove1 )  Abc_NtkDelete( pNtk1 );
-    if ( fRemove2 )  Abc_NtkDelete( pNtk2 );
-}
-
-/**Function*************************************************************
-
   Synopsis    [Gives the current ABC network to AIG manager for processing.]
 
   Description []
@@ -520,7 +357,6 @@ Abc_Ntk_t * Abc_NtkDar( Abc_Ntk_t * pNtk )
     return pNtkAig;
 }
 
-
 /**Function*************************************************************
 
   Synopsis    [Gives the current ABC network to AIG manager for processing.]
@@ -532,483 +368,59 @@ Abc_Ntk_t * Abc_NtkDar( Abc_Ntk_t * pNtk )
   SeeAlso     []
 
 ***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarFraig( Abc_Ntk_t * pNtk, int nConfLimit, int fDoSparse, int fProve, int fTransfer, int fSpeculate, int fChoicing, int fVerbose )
-{
-    Fra_Par_t Pars, * pPars = &Pars; 
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan, * pTemp;
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-    Fra_ParamsDefault( pPars );
-    pPars->nBTLimitNode = nConfLimit;
-    pPars->fChoicing    = fChoicing;
-    pPars->fDoSparse    = fDoSparse;
-    pPars->fSpeculate   = fSpeculate;
-    pPars->fProve       = fProve;
-    pPars->fVerbose     = fVerbose;
-    pMan = Fra_FraigPerform( pTemp = pMan, pPars );
-    if ( fChoicing )
-        pNtkAig = Abc_NtkFromDarChoices( pNtk, pMan );
-    else
-        pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pTemp );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkCSweep( Abc_Ntk_t * pNtk, int nCutsMax, int nLeafMax, int fVerbose )
-{
-    extern Aig_Man_t * Csw_Sweep( Aig_Man_t * pAig, int nCutsMax, int nLeafMax, int fVerbose );
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan, * pTemp;
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-    pMan = Csw_Sweep( pTemp = pMan, nCutsMax, nLeafMax, fVerbose );
-    pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pTemp );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDRewrite( Abc_Ntk_t * pNtk, Dar_RwrPar_t * pPars )
+Abc_Ntk_t * Abc_NtkDarLatchSweep( Abc_Ntk_t * pNtk, int fLatchSweep, int fVerbose )
 {
-    Aig_Man_t * pMan, * pTemp;
     Abc_Ntk_t * pNtkAig;
-    int clk;
-    assert( Abc_NtkIsStrash(pNtk) );
-    pMan = Abc_NtkToDar( pNtk, 0 );
+    Aig_Man_t * pMan;
+    pMan = Abc_NtkToDar( pNtk, 1 );
     if ( pMan == NULL )
         return NULL;
-//    Aig_ManPrintStats( pMan );
-/*
-//    Aig_ManSupports( pMan );
+    Aig_ManSeqCleanup( pMan );
+    if ( fLatchSweep )
     {
-        Vec_Vec_t * vParts;
-        vParts = Aig_ManPartitionSmart( pMan, 50, 1, NULL );
-        Vec_VecFree( vParts );
+        if ( pMan->nRegs )
+            pMan = Aig_ManReduceLaches( pMan, fVerbose );
+        if ( pMan->nRegs )
+            pMan = Aig_ManConstReduce( pMan, fVerbose );
     }
-*/
-    Dar_ManRewrite( pMan, pPars );
-//    pMan = Dar_ManBalance( pTemp = pMan, pPars->fUpdateLevel );
-//    Aig_ManStop( pTemp );
-
-clk = clock();
-    pMan = Aig_ManDup( pTemp = pMan, 0 ); 
-    Aig_ManStop( pTemp );
-//PRT( "time", clock() - clk );
-
-//    Aig_ManPrintStats( pMan );
-    pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDRefactor( Abc_Ntk_t * pNtk, Dar_RefPar_t * pPars )
-{
-    Aig_Man_t * pMan, * pTemp;
-    Abc_Ntk_t * pNtkAig;
-    int clk;
-    assert( Abc_NtkIsStrash(pNtk) );
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-//    Aig_ManPrintStats( pMan );
-
-    Dar_ManRefactor( pMan, pPars );
-//    pMan = Dar_ManBalance( pTemp = pMan, pPars->fUpdateLevel );
-//    Aig_ManStop( pTemp );
-
-clk = clock();
-    pMan = Aig_ManDup( pTemp = pMan, 0 ); 
-    Aig_ManStop( pTemp );
-//PRT( "time", clock() - clk );
-
-//    Aig_ManPrintStats( pMan );
-    pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDCompress2( Abc_Ntk_t * pNtk, int fBalance, int fUpdateLevel, int fVerbose )
-{
-    Aig_Man_t * pMan, * pTemp;
-    Abc_Ntk_t * pNtkAig;
-    int clk;
-    assert( Abc_NtkIsStrash(pNtk) );
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-//    Aig_ManPrintStats( pMan );
-
-clk = clock();
-    pMan = Dar_ManCompress2( pTemp = pMan, fBalance, fUpdateLevel, fVerbose ); 
-    Aig_ManStop( pTemp );
-//PRT( "time", clock() - clk );
-
-//    Aig_ManPrintStats( pMan );
-    pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDChoice( Abc_Ntk_t * pNtk, int fBalance, int fUpdateLevel, int fVerbose )
-{
-    Aig_Man_t * pMan, * pTemp;
-    Abc_Ntk_t * pNtkAig;
-    assert( Abc_NtkIsStrash(pNtk) );
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-    pMan = Dar_ManChoice( pTemp = pMan, fBalance, fUpdateLevel, fVerbose );
-    Aig_ManStop( pTemp );
-    pNtkAig = Abc_NtkFromDarChoices( pNtk, pMan );
+    pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
     Aig_ManStop( pMan );
     return pNtkAig;
 }
 
 /**Function*************************************************************
 
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
+  Synopsis    [Computes latch correspondence.]
 
   Description []
                
   SideEffects []
 
   SeeAlso     []
-
+ 
 ***********************************************************************/
-Abc_Ntk_t * Abc_NtkDrwsat( Abc_Ntk_t * pNtk, int fBalance, int fVerbose )
+Abc_Ntk_t * Abc_NtkDarLcorr( Abc_Ntk_t * pNtk, int nFramesP, int nConfMax, int fVerbose )
 {
+    extern Aig_Man_t * Fra_FraigLatchCorrespondence( Aig_Man_t * pAig, int nFramesP, int nConfMax, int fProve, int fVerbose, int * pnIter );
     Aig_Man_t * pMan, * pTemp;
     Abc_Ntk_t * pNtkAig;
-    int clk;
-    assert( Abc_NtkIsStrash(pNtk) );
-    pMan = Abc_NtkToDar( pNtk, 0 );
+    pMan = Abc_NtkToDar( pNtk, 1 );
     if ( pMan == NULL )
         return NULL;
-//    Aig_ManPrintStats( pMan );
-
-clk = clock();
-    pMan = Dar_ManRwsat( pTemp = pMan, fBalance, fVerbose ); 
+    pMan = Fra_FraigLatchCorrespondence( pTemp = pMan, nFramesP, nConfMax, 0, fVerbose, NULL );
     Aig_ManStop( pTemp );
-//PRT( "time", clock() - clk );
-
-//    Aig_ManPrintStats( pMan );
-    pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkConstructFromCnf( Abc_Ntk_t * pNtk, Cnf_Man_t * p, Vec_Ptr_t * vMapped )
-{
-    Abc_Ntk_t * pNtkNew;
-    Abc_Obj_t * pNode, * pNodeNew;
-    Aig_Obj_t * pObj, * pLeaf;
-    Cnf_Cut_t * pCut;
-    Vec_Int_t * vCover;
-    unsigned uTruth;
-    int i, k, nDupGates;
-    // create the new network
-    pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_SOP );
-    // make the mapper point to the new network
-    Aig_ManConst1(p->pManAig)->pData = Abc_NtkCreateNodeConst1(pNtkNew);
-    Abc_NtkForEachCi( pNtk, pNode, i )
-        Aig_ManPi(p->pManAig, i)->pData = pNode->pCopy;
-    // process the nodes in topological order
-    vCover = Vec_IntAlloc( 1 << 16 );
-    Vec_PtrForEachEntry( vMapped, pObj, i )
-    {
-        // create new node
-        pNodeNew = Abc_NtkCreateNode( pNtkNew );
-        // add fanins according to the cut
-        pCut = pObj->pData;
-        Cnf_CutForEachLeaf( p->pManAig, pCut, pLeaf, k )
-            Abc_ObjAddFanin( pNodeNew, pLeaf->pData );
-        // add logic function
-        if ( pCut->nFanins < 5 )
-        {
-            uTruth = 0xFFFF & *Cnf_CutTruth(pCut);
-            Cnf_SopConvertToVector( p->pSops[uTruth], p->pSopSizes[uTruth], vCover );
-            pNodeNew->pData = Abc_SopCreateFromIsop( pNtkNew->pManFunc, pCut->nFanins, vCover );
-        }
-        else
-            pNodeNew->pData = Abc_SopCreateFromIsop( pNtkNew->pManFunc, pCut->nFanins, pCut->vIsop[1] );
-        // save the node
-        pObj->pData = pNodeNew;
-    }
-    Vec_IntFree( vCover );
-    // add the CO drivers
-    Abc_NtkForEachCo( pNtk, pNode, i )
-    {
-        pObj = Aig_ManPo(p->pManAig, i);
-        pNodeNew = Abc_ObjNotCond( Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) );
-        Abc_ObjAddFanin( pNode->pCopy, pNodeNew );
-    }
-
-    // remove the constant node if not used
-    pNodeNew = (Abc_Obj_t *)Aig_ManConst1(p->pManAig)->pData;
-    if ( Abc_ObjFanoutNum(pNodeNew) == 0 )
-        Abc_NtkDeleteObj( pNodeNew );
-    // minimize the node
-//    Abc_NtkSweep( pNtkNew, 0 );
-    // decouple the PO driver nodes to reduce the number of levels
-    nDupGates = Abc_NtkLogicMakeSimpleCos( pNtkNew, 1 );
-//    if ( nDupGates && If_ManReadVerbose(pIfMan) )
-//        printf( "Duplicated %d gates to decouple the CO drivers.\n", nDupGates );
-    if ( !Abc_NtkCheck( pNtkNew ) )
-        fprintf( stdout, "Abc_NtkConstructFromCnf(): Network check has failed.\n" );
-    return pNtkNew;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarToCnf( Abc_Ntk_t * pNtk, char * pFileName )
-{
-    Vec_Ptr_t * vMapped;
-    Aig_Man_t * pMan;
-    Cnf_Man_t * pManCnf;
-    Cnf_Dat_t * pCnf;
-    Abc_Ntk_t * pNtkNew = NULL;
-    assert( Abc_NtkIsStrash(pNtk) );
-
-    // convert to the AIG manager
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    if ( pMan == NULL )
-        return NULL;
-    if ( !Aig_ManCheck( pMan ) )
-    {
-        printf( "Abc_NtkDarToCnf: AIG check has failed.\n" );
-        Aig_ManStop( pMan );
-        return NULL;
-    }
-    // perform balance
-    Aig_ManPrintStats( pMan );
-
-    // derive CNF
-    pCnf = Cnf_Derive( pMan, 0 );
-    pManCnf = Cnf_ManRead();
-
-    // write the network for verification
-    vMapped = Cnf_ManScanMapping( pManCnf, 1, 0 );
-    pNtkNew = Abc_NtkConstructFromCnf( pNtk, pManCnf, vMapped );
-    Vec_PtrFree( vMapped );
-
-    // write CNF into a file
-    Cnf_DataWriteIntoFile( pCnf, pFileName, 0 );
-    Cnf_DataFree( pCnf );
-    Cnf_ClearMemory();
-
-    Aig_ManStop( pMan );
-    return pNtkNew;
-}
-
-
-/**Function*************************************************************
-
-  Synopsis    [Solves combinational miter using a SAT solver.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDSat( Abc_Ntk_t * pNtk, sint64 nConfLimit, sint64 nInsLimit, int fVerbose )
-{
-    Aig_Man_t * pMan;
-    int RetValue;//, clk = clock();
-    assert( Abc_NtkIsStrash(pNtk) );
-    assert( Abc_NtkLatchNum(pNtk) == 0 );
-    assert( Abc_NtkPoNum(pNtk) == 1 );
-    pMan = Abc_NtkToDar( pNtk, 0 );
-    RetValue = Fra_FraigSat( pMan, nConfLimit, nInsLimit, fVerbose ); 
-    pNtk->pModel = pMan->pData, pMan->pData = NULL;
-    Aig_ManStop( pMan );
-    return RetValue;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDarCec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fPartition, int fVerbose )
-{
-    Aig_Man_t * pMan, * pMan1, * pMan2;
-    Abc_Ntk_t * pMiter;
-    int RetValue, clkTotal = clock();
-
-    // cannot partition if it is already a miter
-    if ( pNtk2 == NULL && fPartition == 1 )
-    {
-        printf( "Abc_NtkDarCec(): Switching to non-partitioned CEC for the miter.\n" );
-        fPartition = 0;
-    }
-
-    // if partitioning is selected, call partitioned CEC
-    if ( fPartition )
-    {
-        pMan1 = Abc_NtkToDar( pNtk1, 0 );
-        pMan2 = Abc_NtkToDar( pNtk2, 0 );
-        RetValue = Fra_FraigCecPartitioned( pMan1, pMan2, fVerbose );
-        Aig_ManStop( pMan1 );
-        Aig_ManStop( pMan2 );
-        goto finish;
-    }
-
-    if ( pNtk2 != NULL )
-    {
-        // get the miter of the two networks
-        pMiter = Abc_NtkMiter( pNtk1, pNtk2, 0, 0 );
-        if ( pMiter == NULL )
-        {
-            printf( "Miter computation has failed.\n" );
-            return 0;
-        }
-    }
+    if ( Aig_ManRegNum(pMan) < Abc_NtkLatchNum(pNtk) )
+        pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
     else
     {
-        pMiter = Abc_NtkDup( pNtk1 );
-    }
-    RetValue = Abc_NtkMiterIsConstant( pMiter );
-    if ( RetValue == 0 )
-    {
-//        extern void Abc_NtkVerifyReportErrorSeq( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int * pModel, int nFrames );
-        printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
-        // report the error
-        if ( pNtk2 == NULL )
-            pNtk1->pModel = Abc_NtkVerifyGetCleanModel( pNtk1, 1 );
-//        pMiter->pModel = Abc_NtkVerifyGetCleanModel( pMiter, nFrames );
-//        Abc_NtkVerifyReportErrorSeq( pNtk1, pNtk2, pMiter->pModel, nFrames );
-//        FREE( pMiter->pModel );
-        Abc_NtkDelete( pMiter );
-        return 0;
-    }
-    if ( RetValue == 1 )
-    {
-        Abc_NtkDelete( pMiter );
-        printf( "Networks are equivalent after structural hashing.\n" );
-        return 1;
-    }
-
-    // derive the AIG manager
-    pMan = Abc_NtkToDar( pMiter, 0 );
-    Abc_NtkDelete( pMiter );
-    if ( pMan == NULL )
-    {
-        printf( "Converting miter into AIG has failed.\n" );
-        return -1;
+        Abc_Obj_t * pObj;
+        int i;
+        pNtkAig = Abc_NtkFromDar( pNtk, pMan );
+        Abc_NtkForEachLatch( pNtkAig, pObj, i )
+            Abc_LatchSetInit0( pObj );
     }
-    // perform verification
-    RetValue = Fra_FraigCec( &pMan, fVerbose );
-    // transfer model if given
-    if ( pNtk2 == NULL )
-        pNtk1->pModel = pMan->pData, pMan->pData = NULL;
     Aig_ManStop( pMan );
-
-finish:
-    // report the miter
-    if ( RetValue == 1 )
-    {
-        printf( "Networks are equivalent.   " );
-PRT( "Time", clock() - clkTotal );
-    }
-    else if ( RetValue == 0 )
-    {
-        printf( "Networks are NOT EQUIVALENT.   " );
-PRT( "Time", clock() - clkTotal );
-    }
-    else
-    {
-        printf( "Networks are UNDECIDED.   " );
-PRT( "Time", clock() - clkTotal );
-    }
-    fflush( stdout );
-    return RetValue;
+    return pNtkAig;
 }
 
 /**Function*************************************************************
@@ -1024,7 +436,8 @@ PRT( "Time", clock() - clkTotal );
 ***********************************************************************/
 Abc_Ntk_t * Abc_NtkDarSeqSweep( Abc_Ntk_t * pNtk, int nFramesP, int nFramesK, int nMaxImps, int nMaxLevs, int fRewrite, int fUseImps, int fLatchCorr, int fWriteImps, int fVerbose )
 {
-    Fraig_Params_t Params;
+    extern Aig_Man_t * Fra_FraigInduction( Aig_Man_t * pManAig, int nFramesP, int nFramesK, int nMaxImps, int nMaxLevs, int fRewrite, int fUseImps, int fLatchCorr, int fWriteImps, int fVerbose, int * pnIter );
+//    Fraig_Params_t Params;
     Abc_Ntk_t * pNtkAig, * pNtkFraig;
     Aig_Man_t * pMan, * pTemp;
     int clk = clock();
@@ -1032,8 +445,8 @@ Abc_Ntk_t * Abc_NtkDarSeqSweep( Abc_Ntk_t * pNtk, int nFramesP, int nFramesK, in
     // preprocess the miter by fraiging it
     // (note that for each functional class, fraiging leaves one representative;
     // so fraiging does not reduce the number of functions represented by nodes
-    Fraig_ParamsSetDefault( &Params );
-    Params.nBTLimit = 100000;
+//    Fraig_ParamsSetDefault( &Params );
+//    Params.nBTLimit = 100000;
 //    pNtkFraig = Abc_NtkFraig( pNtk, &Params, 0, 0 );
     pNtkFraig = Abc_NtkDup( pNtk );
 if ( fVerbose ) 
@@ -1065,113 +478,6 @@ PRT( "Initial fraiging time", clock() - clk );
 
 /**Function*************************************************************
 
-  Synopsis    [Computes latch correspondence.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
- 
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarLcorr( Abc_Ntk_t * pNtk, int nFramesP, int nConfMax, int fVerbose )
-{
-    Aig_Man_t * pMan, * pTemp;
-    Abc_Ntk_t * pNtkAig;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return NULL;
-    pMan = Fra_FraigLatchCorrespondence( pTemp = pMan, nFramesP, nConfMax, 0, fVerbose, NULL );
-    Aig_ManStop( pTemp );
-    if ( Aig_ManRegNum(pMan) < Abc_NtkLatchNum(pNtk) )
-        pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
-    else
-    {
-        Abc_Obj_t * pObj;
-        int i;
-        pNtkAig = Abc_NtkFromDar( pNtk, pMan );
-        Abc_NtkForEachLatch( pNtkAig, pObj, i )
-            Abc_LatchSetInit0( pObj );
-    }
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDarBmc( Abc_Ntk_t * pNtk, int nFrames, int nBTLimit, int fRewrite, int fVerbose )
-{
-    Aig_Man_t * pMan;
-    int clk = clock();
-    // derive the AIG manager
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-    {
-        printf( "Converting miter into AIG has failed.\n" );
-        return -1;
-    }
-    assert( pMan->nRegs > 0 );
-    // perform verification
-    Fra_BmcPerformSimple( pMan, nFrames, nBTLimit, fRewrite, fVerbose );
-    pNtk->pSeqModel = pMan->pSeqModel; pMan->pSeqModel = NULL;
-    if ( pNtk->pSeqModel )
-    {
-        Fra_Cex_t * pCex = pNtk->pSeqModel;
-        printf( "Output %d was asserted in frame %d (use \"write_counter\" to dump the trace). ", pCex->iPo, pCex->iFrame );
-    }
-    else
-        printf( "No output was asserted after BMC with %d frames. ", nFrames );
-PRT( "Time", clock() - clk );
-    Aig_ManStop( pMan );
-    return 1;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDarProve( Abc_Ntk_t * pNtk, int nFrames, int fRetimeFirst, int fVerbose, int fVeryVerbose )
-{
-    Aig_Man_t * pMan;
-    int RetValue;
-    // derive the AIG manager
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-    {
-        printf( "Converting miter into AIG has failed.\n" );
-        return -1;
-    }
-    assert( pMan->nRegs > 0 );
-    // perform verification
-    RetValue = Fra_FraigSec( pMan, nFrames, fRetimeFirst, fVerbose, fVeryVerbose );
-    pNtk->pSeqModel = pMan->pSeqModel; pMan->pSeqModel = NULL;
-    if ( pNtk->pSeqModel )
-    {
-        Fra_Cex_t * pCex = pNtk->pSeqModel;
-        printf( "Output %d was asserted in frame %d (use \"write_counter\" to dump the trace).\n", pCex->iPo, pCex->iFrame );
-    }
-    Aig_ManStop( pMan );
-    return RetValue;
-}
-
-/**Function*************************************************************
-
   Synopsis    [Gives the current ABC network to AIG manager for processing.]
 
   Description []
@@ -1183,13 +489,14 @@ int Abc_NtkDarProve( Abc_Ntk_t * pNtk, int nFrames, int fRetimeFirst, int fVerbo
 ***********************************************************************/
 int Abc_NtkDarSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nFrames, int fRetimeFirst, int fVerbose, int fVeryVerbose )
 {
+    extern int Fra_FraigSec( Aig_Man_t * p, int nFramesMax, int fRetimeFirst, int fVerbose, int fVeryVerbose );
 //    Fraig_Params_t Params;
     Aig_Man_t * pMan;
     Abc_Ntk_t * pMiter;//, * pTemp;
     int RetValue;
  
     // get the miter of the two networks
-    pMiter = Abc_NtkMiter( pNtk1, pNtk2, 0, 0 );
+    pMiter = Abc_NtkMiter( pNtk1, pNtk2, 0 );
     if ( pMiter == NULL )
     {
         printf( "Miter computation has failed.\n" );
@@ -1200,10 +507,12 @@ int Abc_NtkDarSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nFrames, int fRetim
     {
         extern void Abc_NtkVerifyReportErrorSeq( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int * pModel, int nFrames );
         printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
+/*
         // report the error
         pMiter->pModel = Abc_NtkVerifyGetCleanModel( pMiter, nFrames );
         Abc_NtkVerifyReportErrorSeq( pNtk1, pNtk2, pMiter->pModel, nFrames );
         FREE( pMiter->pModel );
+*/
         Abc_NtkDelete( pMiter );
         return 0;
     }
@@ -1258,314 +567,7 @@ int Abc_NtkDarSec( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nFrames, int fRetim
     return RetValue;
 }
 
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
 
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarLatchSweep( Abc_Ntk_t * pNtk, int fLatchSweep, int fVerbose )
-{
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return NULL;
-    Aig_ManSeqCleanup( pMan );
-    if ( fLatchSweep )
-    {
-        if ( pMan->nRegs )
-            pMan = Aig_ManReduceLaches( pMan, fVerbose );
-        if ( pMan->nRegs )
-            pMan = Aig_ManConstReduce( pMan, fVerbose );
-    }
-    pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarRetime( Abc_Ntk_t * pNtk, int nStepsMax, int fVerbose )
-{
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan, * pTemp;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return NULL;
-//    Aig_ManReduceLachesCount( pMan );
-    if ( pMan->vFlopNums )
-        Vec_IntFree( pMan->vFlopNums ); 
-    pMan->vFlopNums = NULL;
-
-    pMan = Rtm_ManRetime( pTemp = pMan, 1, nStepsMax, 0 );
-    Aig_ManStop( pTemp );
-
-//    pMan = Aig_ManReduceLaches( pMan, 1 );
-//    pMan = Aig_ManConstReduce( pMan, 1 );
-
-    pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarRetimeF( Abc_Ntk_t * pNtk, int nStepsMax, int fVerbose )
-{
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan, * pTemp;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return NULL;
-//    Aig_ManReduceLachesCount( pMan );
-    if ( pMan->vFlopNums )
-        Vec_IntFree( pMan->vFlopNums ); 
-    pMan->vFlopNums = NULL;
-
-    pMan = Aig_ManRetimeFrontier( pTemp = pMan, nStepsMax );
-    Aig_ManStop( pTemp );
-
-//    pMan = Aig_ManReduceLaches( pMan, 1 );
-//    pMan = Aig_ManConstReduce( pMan, 1 );
-
-    pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Abc_NtkDarHaigRecord( Abc_Ntk_t * pNtk )
-{
-    Aig_Man_t * pMan;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return;
-//    Aig_ManReduceLachesCount( pMan );
-    if ( pMan->vFlopNums )
-        Vec_IntFree( pMan->vFlopNums ); 
-    pMan->vFlopNums = NULL;
-    Aig_ManHaigRecord( pMan );
-    Aig_ManStop( pMan );
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Performs random simulation.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDarSeqSim( Abc_Ntk_t * pNtk, int nFrames, int nWords, int fVerbose )
-{
-    Aig_Man_t * pMan;
-    Fra_Sml_t * pSml;
-    Fra_Cex_t * pCex;
-    int RetValue, clk = clock();
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    pSml = Fra_SmlSimulateSeq( pMan, 0, nFrames, nWords );
-    if ( pSml->fNonConstOut )
-    {
-        pCex = Fra_SmlGetCounterExample( pSml );
-        if ( pCex )
-            printf( "Simulation of %d frames with %d words asserted output %d in frame %d. ", 
-                nFrames, nWords, pCex->iPo, pCex->iFrame );
-        pNtk->pSeqModel = pCex;
-        RetValue = 1;
-    }
-    else
-    {
-        RetValue = 0;
-        printf( "Simulation of %d frames with %d words did not assert the outputs. ", 
-            nFrames, nWords );
-    }
-    PRT( "Time", clock() - clk );
-    Fra_SmlStop( pSml );
-    Aig_ManStop( pMan );
-    return RetValue;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Gives the current ABC network to AIG manager for processing.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-int Abc_NtkDarClau( Abc_Ntk_t * pNtk, int nFrames, int nPref, int nClauses, int nLutSize, int nLevels, int nCutsMax, int nBatches, int fStepUp, int fBmc, int fRefs, int fVerbose, int fVeryVerbose )
-{
-    extern int Fra_Clau( Aig_Man_t * pMan, int nIters, int fVerbose, int fVeryVerbose );
-    extern int Fra_Claus( Aig_Man_t * pAig, int nFrames, int nPref, int nClauses, int nLutSize, int nLevels, int nCutsMax, int nBatches, int fStepUp, int fBmc, int fRefs, int fVerbose, int fVeryVerbose );
-    Aig_Man_t * pMan;
-    if ( Abc_NtkPoNum(pNtk) != 1 )
-    {
-        printf( "The number of outputs should be 1.\n" );
-        return 1;
-    }
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return 1;
-//    Aig_ManReduceLachesCount( pMan );
-    if ( pMan->vFlopNums )
-        Vec_IntFree( pMan->vFlopNums ); 
-    pMan->vFlopNums = NULL;
-
-//    Fra_Clau( pMan, nStepsMax, fVerbose, fVeryVerbose );
-    Fra_Claus( pMan, nFrames, nPref, nClauses, nLutSize, nLevels, nCutsMax, nBatches, fStepUp, fBmc, fRefs, fVerbose, fVeryVerbose );
-    Aig_ManStop( pMan );
-    return 1;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Performs targe enlargement.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkDarEnlarge( Abc_Ntk_t * pNtk, int nFrames, int fVerbose )
-{
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pMan, * pTemp;
-    pMan = Abc_NtkToDar( pNtk, 1 );
-    if ( pMan == NULL )
-        return NULL;
-    pMan = Aig_ManFrames( pTemp = pMan, nFrames, 0, 1, 1, 1, NULL );
-    Aig_ManStop( pTemp );
-    pNtkAig = Abc_NtkFromDarSeqSweep( pNtk, pMan );
-    Aig_ManStop( pMan );
-    return pNtkAig;
-}
-
-/**Function*************************************************************
-
-  Synopsis    [Interplates two networks.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkInter( Abc_Ntk_t * pNtkOn, Abc_Ntk_t * pNtkOff, int fVerbose )
-{
-    extern Aig_Man_t * Aig_ManInter( Aig_Man_t * pManOn, Aig_Man_t * pManOff, int fVerbose );
-    Abc_Ntk_t * pNtkAig;
-    Aig_Man_t * pManOn, * pManOff, * pManAig;
-    if ( Abc_NtkCoNum(pNtkOn) != 1 || Abc_NtkCoNum(pNtkOff) != 1 )
-    {
-        printf( "Currently works only for single output networks.\n" );
-        return NULL;
-    }
-    if ( Abc_NtkCiNum(pNtkOn) != Abc_NtkCiNum(pNtkOff) )
-    {
-        printf( "The number of PIs should be the same.\n" );
-        return NULL;
-    }
-    // create internal AIGs
-    pManOn = Abc_NtkToDar( pNtkOn, 0 );
-    if ( pManOn == NULL )
-        return NULL;
-    pManOff = Abc_NtkToDar( pNtkOff, 0 );
-    if ( pManOff == NULL )
-        return NULL;
-    // derive the interpolant
-    pManAig = Aig_ManInter( pManOn, pManOff, fVerbose );
-    if ( pManAig == NULL )
-    {
-        printf( "Interpolant computation failed.\n" );
-        return NULL;
-    }
-    Aig_ManStop( pManOn );
-    Aig_ManStop( pManOff );
-    // create logic network
-    pNtkAig = Abc_NtkFromDar( pNtkOn, pManAig );
-    Aig_ManStop( pManAig );
-    return pNtkAig;
-}
-
-
-#include "ntl.h"
-
-/**Function*************************************************************
-
-  Synopsis    [Performs targe enlargement.]
-
-  Description []
-               
-  SideEffects []
-
-  SeeAlso     []
-
-***********************************************************************/
-void Abc_NtkDarTestBlif( char * pFileName )
-{
-    char Buffer[1000];
-    Ntl_Man_t * p;
-    p = Ioa_ReadBlif( pFileName, 1 );
-    if ( p == NULL )
-    {
-        printf( "Abc_NtkDarTestBlif(): Reading BLIF has failed.\n" );
-        return;
-    }
-    Ntl_ManPrintStats( p );
-//    if ( !Ntl_ManInsertTest( p ) )
-    if ( !Ntl_ManInsertTestIf( p ) )
-    {
-        printf( "Abc_NtkDarTestBlif(): Tranformation of the netlist has failed.\n" );
-        return;
-    }
-//    sprintf( Buffer, "%s_.blif", p->pName );
-    sprintf( Buffer, "test_.blif", p->pName );
-    Ioa_WriteBlif( p, Buffer );
-    Ntl_ManFree( p );
-}
 
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///