From 6e74c46bcfbf48029d17835754fd570f283fb9d8 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Wed, 13 Apr 2011 22:41:54 -0700
Subject: Enabled new BDD-based reachability engine 'reachy'.
---
abclib.dsp | 60 +++
src/aig/aig/aigDoms.c | 66 +++-
src/aig/aig/aigPack.c | 6 +-
src/aig/gia/gia.h | 4 +
src/aig/llb/llb4Image.c | 770 ++++++++++++++++++++++++++++++++++++++
src/aig/llb/llb4Map.c | 123 ++++++
src/aig/llb/llb4Nonlin.c | 914 +++++++++++++++++++++++++++++++++++++++++++++
src/aig/llb/llbInt.h | 10 +-
src/aig/llb/module.make | 4 +-
src/base/abci/abc.c | 139 +++++++
src/base/abci/abcIf.c | 2 +-
src/bdd/cudd/cuddCompose.c | 3 +
src/misc/vec/vecVec.h | 4 +
13 files changed, 2096 insertions(+), 9 deletions(-)
create mode 100644 src/aig/llb/llb4Image.c
create mode 100644 src/aig/llb/llb4Map.c
create mode 100644 src/aig/llb/llb4Nonlin.c
diff --git a/abclib.dsp b/abclib.dsp
index eaef81e2..c027d0d8 100644
--- a/abclib.dsp
+++ b/abclib.dsp
@@ -4163,6 +4163,18 @@ SOURCE=.\src\aig\llb\llb3Nonlin.c
# End Source File
# Begin Source File
+SOURCE=.\src\aig\llb\llb4Image.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\llb\llb4Map.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\llb\llb4Nonlin.c
+# End Source File
+# Begin Source File
+
SOURCE=.\src\aig\llb\llbInt.h
# End Source File
# End Group
@@ -4305,6 +4317,54 @@ SOURCE=.\src\aig\au\auUtil.c
# Begin Group "ssm"
# PROP Default_Filter ""
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssm.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssm.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmApi.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmClock.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmInt.h
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmRandom.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmRead.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmReset.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmSchedule.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmSimple.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmSimulate.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\src\aig\ssm\ssmWrite.c
+# End Source File
# End Group
# End Group
# End Group
diff --git a/src/aig/aig/aigDoms.c b/src/aig/aig/aigDoms.c
index e909ac41..0ac2b358 100644
--- a/src/aig/aig/aigDoms.c
+++ b/src/aig/aig/aigDoms.c
@@ -207,9 +207,9 @@ void Aig_ManDomPrint( Aig_Sto_t * pSto )
{
Aig_Obj_t * pObj;
int i;
- Saig_ManForEachLo( pSto->pAig, pObj, i )
+ Saig_ManForEachPi( pSto->pAig, pObj, i )
{
- printf( "*** LO %4d %4d :\n", i, pObj->Id );
+ printf( "*** PI %4d %4d :\n", i, pObj->Id );
Aig_ObjDomVecPrint( pSto, (Vec_Ptr_t *)Vec_PtrEntry(pSto->vDoms, pObj->Id) );
}
}
@@ -647,6 +647,45 @@ Aig_Sto_t * Aig_ManComputeDomsFlops( Aig_Man_t * pAig, int Limit )
return pSto;
}
+/**Function*************************************************************
+
+ Synopsis [Computes multi-node dominators.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Aig_Sto_t * Aig_ManComputeDomsPis( Aig_Man_t * pAig, int Limit )
+{
+ Aig_Sto_t * pSto;
+ Vec_Ptr_t * vNodes;
+ Aig_Obj_t * pObj;
+ int i, clk = clock();
+ pSto = Aig_ManDomStart( pAig, Limit );
+ // initialize flop inputs
+ Aig_ManForEachPo( pAig, pObj, i )
+ Aig_ObjAddTriv( pSto, pObj->Id, Vec_PtrAlloc(1) );
+ // compute internal nodes
+ vNodes = Aig_ManDfsReverse( pAig );
+ Aig_ManMarkFlopTfi( pAig );
+ Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i )
+ if ( Aig_ObjIsTravIdCurrent(pSto->pAig, pObj) )
+ Aig_ObjDomCompute( pSto, pObj );
+ Vec_PtrFree( vNodes );
+ // compute combinational inputs
+ Saig_ManForEachPi( pAig, pObj, i )
+ Aig_ObjDomCompute( pSto, pObj );
+ // print statistics
+ printf( "Nodes =%4d. PIs =%4d. Doms =%9d. Ave =%8.2f. ",
+ pSto->nDomNodes, Saig_ManPiNum(pSto->pAig), pSto->nDomsTotal,
+// pSto->nDomsFilter1, pSto->nDomsFilter2,
+ 1.0 * pSto->nDomsTotal / (pSto->nDomNodes + Saig_ManPiNum(pSto->pAig)) );
+ Abc_PrintTime( 1, "Time", clock() - clk );
+ return pSto;
+}
/**Function*************************************************************
@@ -971,7 +1010,7 @@ void Aig_ObjDomFindGood( Aig_Sto_t * pSto )
SeeAlso []
***********************************************************************/
-void Aig_ManComputeDomsTest( Aig_Man_t * pAig, int Num )
+void Aig_ManComputeDomsTest2( Aig_Man_t * pAig, int Num )
{
Aig_Sto_t * pSto;
// int i;
@@ -988,6 +1027,27 @@ void Aig_ManComputeDomsTest( Aig_Man_t * pAig, int Num )
Aig_ManFanoutStop( pAig );
}
+/**Function*************************************************************
+
+ Synopsis [Computes multi-node dominators.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Aig_ManComputeDomsTest( Aig_Man_t * pAig )
+{
+ Aig_Sto_t * pSto;
+ Aig_ManFanoutStart( pAig );
+ pSto = Aig_ManComputeDomsPis( pAig, 1 );
+ Aig_ManDomPrint( pSto );
+ Aig_ManDomStop( pSto );
+ Aig_ManFanoutStop( pAig );
+}
+
diff --git a/src/aig/aig/aigPack.c b/src/aig/aig/aigPack.c
index 493e4995..0ecbf533 100644
--- a/src/aig/aig/aigPack.c
+++ b/src/aig/aig/aigPack.c
@@ -113,10 +113,10 @@ void Aig_ManPackPrintCare( Aig_ManPack_t * p )
Aig_ManForEachPi( p->pAig, pObj, i )
{
Sign = Vec_WrdEntry( p->vPiCare, i );
- Extra_PrintBinary( stdout, (unsigned *)&Sign, 64 );
- printf( "\n" );
+// Extra_PrintBinary( stdout, (unsigned *)&Sign, 64 );
+// printf( "\n" );
}
- printf( "\n" );
+// printf( "\n" );
}
diff --git a/src/aig/gia/gia.h b/src/aig/gia/gia.h
index 4059153d..16259a1e 100644
--- a/src/aig/gia/gia.h
+++ b/src/aig/gia/gia.h
@@ -316,6 +316,10 @@ static inline void Gia_ObjSetValue( Gia_Obj_t * pObj, int i ) {
static inline int Gia_ObjPhase( Gia_Obj_t * pObj ) { return pObj->fPhase; }
static inline int Gia_ObjPhaseReal( Gia_Obj_t * pObj ) { return Gia_Regular(pObj)->fPhase ^ Gia_IsComplement(pObj); }
+static inline int Gia_ManIdToCioId( Gia_Man_t * p, int Id ) { return Gia_ObjCioId( Gia_ManObj(p, Id) ); }
+static inline int Gia_ManCiIdToId( Gia_Man_t * p, int CiId ) { return Gia_ObjId( p, Gia_ManCi(p, CiId) ); }
+static inline int Gia_ManCoIdToId( Gia_Man_t * p, int CoId ) { return Gia_ObjId( p, Gia_ManCo(p, CoId) ); }
+
static inline int Gia_ObjIsPi( Gia_Man_t * p, Gia_Obj_t * pObj ) { return Gia_ObjIsCi(pObj) && Gia_ObjCioId(pObj) < Gia_ManPiNum(p); }
static inline int Gia_ObjIsPo( Gia_Man_t * p, Gia_Obj_t * pObj ) { return Gia_ObjIsCo(pObj) && Gia_ObjCioId(pObj) < Gia_ManPoNum(p); }
static inline int Gia_ObjIsRo( Gia_Man_t * p, Gia_Obj_t * pObj ) { return Gia_ObjIsCi(pObj) && Gia_ObjCioId(pObj) >= Gia_ManPiNum(p); }
diff --git a/src/aig/llb/llb4Image.c b/src/aig/llb/llb4Image.c
new file mode 100644
index 00000000..b882ac65
--- /dev/null
+++ b/src/aig/llb/llb4Image.c
@@ -0,0 +1,770 @@
+/**CFile****************************************************************
+
+ FileName [llb3Image.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [BDD based reachability.]
+
+ Synopsis [Computes image using partitioned structure.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - June 20, 2005.]
+
+ Revision [$Id: llb3Image.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "llbInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+typedef struct Llb_Var_t_ Llb_Var_t;
+struct Llb_Var_t_
+{
+ int iVar; // variable number
+ int nScore; // variable score
+ Vec_Int_t * vParts; // partitions
+};
+
+typedef struct Llb_Prt_t_ Llb_Prt_t;
+struct Llb_Prt_t_
+{
+ int iPart; // partition number
+ int nSize; // the number of BDD nodes
+ DdNode * bFunc; // the partition
+ Vec_Int_t * vVars; // support
+};
+
+typedef struct Llb_Mgr_t_ Llb_Mgr_t;
+struct Llb_Mgr_t_
+{
+ DdManager * dd; // working BDD manager
+ Vec_Int_t * vVars2Q; // variables to quantify
+ // internal
+ Llb_Prt_t ** pParts; // partitions
+ Llb_Var_t ** pVars; // variables
+ int iPartFree; // next free partition
+ int nVars; // the number of BDD variables
+ int nSuppMax; // maximum support size
+ // temporary
+ int * pSupp; // temporary support storage
+};
+
+static inline Llb_Var_t * Llb_MgrVar( Llb_Mgr_t * p, int i ) { return p->pVars[i]; }
+static inline Llb_Prt_t * Llb_MgrPart( Llb_Mgr_t * p, int i ) { return p->pParts[i]; }
+
+// iterator over vars
+#define Llb_MgrForEachVar( p, pVar, i ) \
+ for ( i = 0; (i < p->nVars) && (((pVar) = Llb_MgrVar(p, i)), 1); i++ ) if ( pVar == NULL ) {} else
+// iterator over parts
+#define Llb_MgrForEachPart( p, pPart, i ) \
+ for ( i = 0; (i < p->iPartFree) && (((pPart) = Llb_MgrPart(p, i)), 1); i++ ) if ( pPart == NULL ) {} else
+
+// iterator over vars of one partition
+#define Llb_PartForEachVar( p, pPart, pVar, i ) \
+ for ( i = 0; (i < Vec_IntSize(pPart->vVars)) && (((pVar) = Llb_MgrVar(p, Vec_IntEntry(pPart->vVars,i))), 1); i++ )
+// iterator over parts of one variable
+#define Llb_VarForEachPart( p, pVar, pPart, i ) \
+ for ( i = 0; (i < Vec_IntSize(pVar->vParts)) && (((pPart) = Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,i))), 1); i++ )
+
+// statistics
+//int timeBuild, timeAndEx, timeOther;
+//int nSuppMax;
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Removes one variable.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4RemoveVar( Llb_Mgr_t * p, Llb_Var_t * pVar )
+{
+ assert( p->pVars[pVar->iVar] == pVar );
+ p->pVars[pVar->iVar] = NULL;
+ Vec_IntFree( pVar->vParts );
+ ABC_FREE( pVar );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Removes one partition.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4RemovePart( Llb_Mgr_t * p, Llb_Prt_t * pPart )
+{
+ assert( p->pParts[pPart->iPart] == pPart );
+ p->pParts[pPart->iPart] = NULL;
+ Vec_IntFree( pPart->vVars );
+ Cudd_RecursiveDeref( p->dd, pPart->bFunc );
+ ABC_FREE( pPart );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Create cube with singleton variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4CreateCube1( Llb_Mgr_t * p, Llb_Prt_t * pPart )
+{
+ DdNode * bCube, * bTemp;
+ Llb_Var_t * pVar;
+ int i, TimeStop;
+ TimeStop = p->dd->TimeStop; p->dd->TimeStop = 0;
+ bCube = Cudd_ReadOne(p->dd); Cudd_Ref( bCube );
+ Llb_PartForEachVar( p, pPart, pVar, i )
+ {
+ assert( Vec_IntSize(pVar->vParts) > 0 );
+ if ( Vec_IntSize(pVar->vParts) != 1 )
+ continue;
+ assert( Vec_IntEntry(pVar->vParts, 0) == pPart->iPart );
+ bCube = Cudd_bddAnd( p->dd, bTemp = bCube, Cudd_bddIthVar(p->dd, pVar->iVar) ); Cudd_Ref( bCube );
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ }
+ Cudd_Deref( bCube );
+ p->dd->TimeStop = TimeStop;
+ return bCube;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Create cube of variables appearing only in two partitions.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4CreateCube2( Llb_Mgr_t * p, Llb_Prt_t * pPart1, Llb_Prt_t * pPart2 )
+{
+ DdNode * bCube, * bTemp;
+ Llb_Var_t * pVar;
+ int i, TimeStop;
+ TimeStop = p->dd->TimeStop; p->dd->TimeStop = 0;
+ bCube = Cudd_ReadOne(p->dd); Cudd_Ref( bCube );
+ Llb_PartForEachVar( p, pPart1, pVar, i )
+ {
+ assert( Vec_IntSize(pVar->vParts) > 0 );
+ if ( Vec_IntSize(pVar->vParts) != 2 )
+ continue;
+ if ( (Vec_IntEntry(pVar->vParts, 0) == pPart1->iPart && Vec_IntEntry(pVar->vParts, 1) == pPart2->iPart) ||
+ (Vec_IntEntry(pVar->vParts, 0) == pPart2->iPart && Vec_IntEntry(pVar->vParts, 1) == pPart1->iPart) )
+ {
+ bCube = Cudd_bddAnd( p->dd, bTemp = bCube, Cudd_bddIthVar(p->dd, pVar->iVar) ); Cudd_Ref( bCube );
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ }
+ }
+ Cudd_Deref( bCube );
+ p->dd->TimeStop = TimeStop;
+ return bCube;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if partition has singleton variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4HasSingletonVars( Llb_Mgr_t * p, Llb_Prt_t * pPart )
+{
+ Llb_Var_t * pVar;
+ int i;
+ Llb_PartForEachVar( p, pPart, pVar, i )
+ if ( Vec_IntSize(pVar->vParts) == 1 )
+ return 1;
+ return 0;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if partition has singleton variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4Print( Llb_Mgr_t * p )
+{
+ Llb_Prt_t * pPart;
+ Llb_Var_t * pVar;
+ int i, k;
+ printf( "\n" );
+ Llb_MgrForEachVar( p, pVar, i )
+ {
+ printf( "Var %3d : ", i );
+ Llb_VarForEachPart( p, pVar, pPart, k )
+ printf( "%d ", pPart->iPart );
+ printf( "\n" );
+ }
+ Llb_MgrForEachPart( p, pPart, i )
+ {
+ printf( "Part %3d : ", i );
+ Llb_PartForEachVar( p, pPart, pVar, k )
+ printf( "%d ", pVar->iVar );
+ printf( "\n" );
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Quantifies singles belonging to one partition.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4Quantify1( Llb_Mgr_t * p, Llb_Prt_t * pPart )
+{
+ Llb_Var_t * pVar;
+ Llb_Prt_t * pTemp;
+ Vec_Ptr_t * vSingles;
+ DdNode * bCube, * bTemp;
+ int i, RetValue, nSizeNew;
+ // create cube to be quantified
+ bCube = Llb_Nonlin4CreateCube1( p, pPart ); Cudd_Ref( bCube );
+ assert( !Cudd_IsConstant(bCube) );
+ // derive new function
+ pPart->bFunc = Cudd_bddExistAbstract( p->dd, bTemp = pPart->bFunc, bCube ); Cudd_Ref( pPart->bFunc );
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ Cudd_RecursiveDeref( p->dd, bCube );
+ // get support
+ vSingles = Vec_PtrAlloc( 0 );
+ nSizeNew = Cudd_DagSize(pPart->bFunc);
+ Extra_SupportArray( p->dd, pPart->bFunc, p->pSupp );
+ Llb_PartForEachVar( p, pPart, pVar, i )
+ if ( p->pSupp[pVar->iVar] )
+ {
+ assert( Vec_IntSize(pVar->vParts) > 1 );
+ pVar->nScore -= pPart->nSize - nSizeNew;
+ }
+ else
+ {
+ RetValue = Vec_IntRemove( pVar->vParts, pPart->iPart );
+ assert( RetValue );
+ pVar->nScore -= pPart->nSize;
+ if ( Vec_IntSize(pVar->vParts) == 0 )
+ Llb_Nonlin4RemoveVar( p, pVar );
+ else if ( Vec_IntSize(pVar->vParts) == 1 )
+ Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) );
+ }
+
+ // update partition
+ pPart->nSize = nSizeNew;
+ Vec_IntClear( pPart->vVars );
+ for ( i = 0; i < p->nVars; i++ )
+ if ( p->pSupp[i] && Vec_IntEntry(p->vVars2Q, i) )
+ Vec_IntPush( pPart->vVars, i );
+ // remove other variables
+ Vec_PtrForEachEntry( Llb_Prt_t *, vSingles, pTemp, i )
+ Llb_Nonlin4Quantify1( p, pTemp );
+ Vec_PtrFree( vSingles );
+ return 0;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Quantifies singles belonging to one partition.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4Quantify2( Llb_Mgr_t * p, Llb_Prt_t * pPart1, Llb_Prt_t * pPart2 )
+{
+ int fVerbose = 0;
+ Llb_Var_t * pVar;
+ Llb_Prt_t * pTemp;
+ Vec_Ptr_t * vSingles;
+ DdNode * bCube, * bFunc;
+ int i, RetValue, nSuppSize;
+ int iPart1 = pPart1->iPart;
+ int iPart2 = pPart2->iPart;
+
+ // create cube to be quantified
+ bCube = Llb_Nonlin4CreateCube2( p, pPart1, pPart2 ); Cudd_Ref( bCube );
+if ( fVerbose )
+{
+printf( "\n" );
+printf( "\n" );
+Llb_Nonlin4Print( p );
+printf( "Conjoining partitions %d and %d.\n", pPart1->iPart, pPart2->iPart );
+Extra_bddPrintSupport( p->dd, bCube ); printf( "\n" );
+}
+ bFunc = Cudd_bddAndAbstract( p->dd, pPart1->bFunc, pPart2->bFunc, bCube );
+ if ( bFunc == NULL )
+ {
+ Cudd_RecursiveDeref( p->dd, bCube );
+ return 0;
+ }
+ Cudd_Ref( bFunc );
+ Cudd_RecursiveDeref( p->dd, bCube );
+
+ // create new partition
+ pTemp = p->pParts[p->iPartFree] = ABC_CALLOC( Llb_Prt_t, 1 );
+ pTemp->iPart = p->iPartFree++;
+ pTemp->nSize = Cudd_DagSize(bFunc);
+ pTemp->bFunc = bFunc;
+ pTemp->vVars = Vec_IntAlloc( 8 );
+ // update variables
+ Llb_PartForEachVar( p, pPart1, pVar, i )
+ {
+ RetValue = Vec_IntRemove( pVar->vParts, pPart1->iPart );
+ assert( RetValue );
+ pVar->nScore -= pPart1->nSize;
+ }
+ // update variables
+ Llb_PartForEachVar( p, pPart2, pVar, i )
+ {
+ RetValue = Vec_IntRemove( pVar->vParts, pPart2->iPart );
+ assert( RetValue );
+ pVar->nScore -= pPart2->nSize;
+ }
+ // add variables to the new partition
+ nSuppSize = 0;
+ Extra_SupportArray( p->dd, bFunc, p->pSupp );
+ for ( i = 0; i < p->nVars; i++ )
+ {
+ nSuppSize += p->pSupp[i];
+ if ( p->pSupp[i] && Vec_IntEntry(p->vVars2Q, i) )
+ {
+ pVar = Llb_MgrVar( p, i );
+ pVar->nScore += pTemp->nSize;
+ Vec_IntPush( pVar->vParts, pTemp->iPart );
+ Vec_IntPush( pTemp->vVars, i );
+ }
+ }
+ p->nSuppMax = ABC_MAX( p->nSuppMax, nSuppSize );
+ // remove variables and collect partitions with singleton variables
+ vSingles = Vec_PtrAlloc( 0 );
+ Llb_PartForEachVar( p, pPart1, pVar, i )
+ {
+ if ( Vec_IntSize(pVar->vParts) == 0 )
+ Llb_Nonlin4RemoveVar( p, pVar );
+ else if ( Vec_IntSize(pVar->vParts) == 1 )
+ {
+ if ( fVerbose )
+ printf( "Adding partition %d because of var %d.\n",
+ Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0))->iPart, pVar->iVar );
+ Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) );
+ }
+ }
+ Llb_PartForEachVar( p, pPart2, pVar, i )
+ {
+ if ( pVar == NULL )
+ continue;
+ if ( Vec_IntSize(pVar->vParts) == 0 )
+ Llb_Nonlin4RemoveVar( p, pVar );
+ else if ( Vec_IntSize(pVar->vParts) == 1 )
+ {
+ if ( fVerbose )
+ printf( "Adding partition %d because of var %d.\n",
+ Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0))->iPart, pVar->iVar );
+ Vec_PtrPushUnique( vSingles, Llb_MgrPart(p, Vec_IntEntry(pVar->vParts,0)) );
+ }
+ }
+ // remove partitions
+ Llb_Nonlin4RemovePart( p, pPart1 );
+ Llb_Nonlin4RemovePart( p, pPart2 );
+ // remove other variables
+if ( fVerbose )
+Llb_Nonlin4Print( p );
+ Vec_PtrForEachEntry( Llb_Prt_t *, vSingles, pTemp, i )
+ {
+if ( fVerbose )
+printf( "Updating partitiong %d with singlton vars.\n", pTemp->iPart );
+ Llb_Nonlin4Quantify1( p, pTemp );
+ }
+if ( fVerbose )
+Llb_Nonlin4Print( p );
+ Vec_PtrFree( vSingles );
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Computes volume of the cut.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4CutNodes_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vNodes )
+{
+ if ( Aig_ObjIsTravIdCurrent(p, pObj) )
+ return;
+ Aig_ObjSetTravIdCurrent(p, pObj);
+ if ( Saig_ObjIsLi(p, pObj) )
+ {
+ Llb_Nonlin4CutNodes_rec(p, Aig_ObjFanin0(pObj), vNodes);
+ return;
+ }
+ if ( Aig_ObjIsConst1(pObj) )
+ return;
+ assert( Aig_ObjIsNode(pObj) );
+ Llb_Nonlin4CutNodes_rec(p, Aig_ObjFanin0(pObj), vNodes);
+ Llb_Nonlin4CutNodes_rec(p, Aig_ObjFanin1(pObj), vNodes);
+ Vec_PtrPush( vNodes, pObj );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Computes volume of the cut.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Ptr_t * Llb_Nonlin4CutNodes( Aig_Man_t * p, Vec_Ptr_t * vLower, Vec_Ptr_t * vUpper )
+{
+ Vec_Ptr_t * vNodes;
+ Aig_Obj_t * pObj;
+ int i;
+ // mark the lower cut with the traversal ID
+ Aig_ManIncrementTravId(p);
+ Vec_PtrForEachEntry( Aig_Obj_t *, vLower, pObj, i )
+ Aig_ObjSetTravIdCurrent( p, pObj );
+ // count the upper cut
+ vNodes = Vec_PtrAlloc( 100 );
+ Vec_PtrForEachEntry( Aig_Obj_t *, vUpper, pObj, i )
+ Llb_Nonlin4CutNodes_rec( p, pObj, vNodes );
+ return vNodes;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Starts non-linear quantification scheduling.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4AddPair( Llb_Mgr_t * p, int iPart, int iVar )
+{
+ if ( p->pVars[iVar] == NULL )
+ {
+ p->pVars[iVar] = ABC_CALLOC( Llb_Var_t, 1 );
+ p->pVars[iVar]->iVar = iVar;
+ p->pVars[iVar]->nScore = 0;
+ p->pVars[iVar]->vParts = Vec_IntAlloc( 8 );
+ }
+ Vec_IntPush( p->pVars[iVar]->vParts, iPart );
+ Vec_IntPush( p->pParts[iPart]->vVars, iVar );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Starts non-linear quantification scheduling.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4AddPartition( Llb_Mgr_t * p, int i, DdNode * bFunc )
+{
+ int k, nSuppSize;
+ assert( !Cudd_IsConstant(bFunc) );
+ // create partition
+ p->pParts[i] = ABC_CALLOC( Llb_Prt_t, 1 );
+ p->pParts[i]->iPart = i;
+ p->pParts[i]->bFunc = bFunc; Cudd_Ref( bFunc );
+ p->pParts[i]->vVars = Vec_IntAlloc( 8 );
+ // add support dependencies
+ nSuppSize = 0;
+ Extra_SupportArray( p->dd, bFunc, p->pSupp );
+ for ( k = 0; k < p->nVars; k++ )
+ {
+ nSuppSize += p->pSupp[k];
+ if ( p->pSupp[k] && Vec_IntEntry(p->vVars2Q, k) )
+ Llb_Nonlin4AddPair( p, i, k );
+ }
+ p->nSuppMax = ABC_MAX( p->nSuppMax, nSuppSize );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Checks that each var appears in at least one partition.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+**********************************************************************/
+void Llb_Nonlin4CheckVars( Llb_Mgr_t * p )
+{
+ Llb_Var_t * pVar;
+ int i;
+ Llb_MgrForEachVar( p, pVar, i )
+ assert( Vec_IntSize(pVar->vParts) > 1 );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Find next partition to quantify]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4NextPartitions( Llb_Mgr_t * p, Llb_Prt_t ** ppPart1, Llb_Prt_t ** ppPart2 )
+{
+ Llb_Var_t * pVar, * pVarBest = NULL;
+ Llb_Prt_t * pPart, * pPart1Best = NULL, * pPart2Best = NULL;
+ int i;
+ Llb_Nonlin4CheckVars( p );
+ // find variable with minimum score
+ Llb_MgrForEachVar( p, pVar, i )
+ if ( pVarBest == NULL || pVarBest->nScore > pVar->nScore )
+ pVarBest = pVar;
+ if ( pVarBest == NULL )
+ return 0;
+ // find two partitions with minimum size
+ Llb_VarForEachPart( p, pVarBest, pPart, i )
+ {
+ if ( pPart1Best == NULL )
+ pPart1Best = pPart;
+ else if ( pPart2Best == NULL )
+ pPart2Best = pPart;
+ else if ( pPart1Best->nSize > pPart->nSize || pPart2Best->nSize > pPart->nSize )
+ {
+ if ( pPart1Best->nSize > pPart2Best->nSize )
+ pPart1Best = pPart;
+ else
+ pPart2Best = pPart;
+ }
+ }
+ *ppPart1 = pPart1Best;
+ *ppPart2 = pPart2Best;
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Recomputes scores after variable reordering.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4RecomputeScores( Llb_Mgr_t * p )
+{
+ Llb_Prt_t * pPart;
+ Llb_Var_t * pVar;
+ int i, k;
+ Llb_MgrForEachPart( p, pPart, i )
+ pPart->nSize = Cudd_DagSize(pPart->bFunc);
+ Llb_MgrForEachVar( p, pVar, i )
+ {
+ pVar->nScore = 0;
+ Llb_VarForEachPart( p, pVar, pPart, k )
+ pVar->nScore += pPart->nSize;
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Recomputes scores after variable reordering.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4VerifyScores( Llb_Mgr_t * p )
+{
+ Llb_Prt_t * pPart;
+ Llb_Var_t * pVar;
+ int i, k, nScore;
+ Llb_MgrForEachPart( p, pPart, i )
+ assert( pPart->nSize == Cudd_DagSize(pPart->bFunc) );
+ Llb_MgrForEachVar( p, pVar, i )
+ {
+ nScore = 0;
+ Llb_VarForEachPart( p, pVar, pPart, k )
+ nScore += pPart->nSize;
+ assert( nScore == pVar->nScore );
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Starts non-linear quantification scheduling.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Llb_Mgr_t * Llb_Nonlin4Alloc( DdManager * dd, Vec_Ptr_t * vParts, DdNode * bCurrent, Vec_Int_t * vVars2Q )
+{
+ Llb_Mgr_t * p;
+ DdNode * bFunc;
+ int i;
+ p = ABC_CALLOC( Llb_Mgr_t, 1 );
+ p->dd = dd;
+ p->vVars2Q = vVars2Q;
+ p->nVars = Cudd_ReadSize(dd);
+ p->iPartFree = Vec_PtrSize(vParts);
+ p->pVars = ABC_CALLOC( Llb_Var_t *, p->nVars );
+ p->pParts = ABC_CALLOC( Llb_Prt_t *, 2 * p->iPartFree + 2 );
+ p->pSupp = ABC_ALLOC( int, Cudd_ReadSize(dd) );
+ // add pairs (refs are consumed inside)
+ Vec_PtrForEachEntry( DdNode *, vParts, bFunc, i )
+ Llb_Nonlin4AddPartition( p, i, bFunc );
+ // add partition
+ Llb_Nonlin4AddPartition( p, p->iPartFree++, bCurrent );
+ return p;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Stops non-linear quantification scheduling.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4Free( Llb_Mgr_t * p )
+{
+ Llb_Prt_t * pPart;
+ Llb_Var_t * pVar;
+ int i;
+ Llb_MgrForEachVar( p, pVar, i )
+ Llb_Nonlin4RemoveVar( p, pVar );
+ Llb_MgrForEachPart( p, pPart, i )
+ Llb_Nonlin4RemovePart( p, pPart );
+ ABC_FREE( p->pVars );
+ ABC_FREE( p->pParts );
+ ABC_FREE( p->pSupp );
+ ABC_FREE( p );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Performs image computation.]
+
+ Description [Computes image of BDDs (vFuncs).]
+
+ SideEffects [BDDs in vFuncs are derefed inside. The result is refed.]
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4Image( DdManager * dd, Vec_Ptr_t * vParts, DdNode * bCurrent, Vec_Int_t * vVars2Q )
+{
+ Llb_Prt_t * pPart, * pPart1, * pPart2;
+ Llb_Mgr_t * p;
+ DdNode * bFunc, * bTemp;
+ int i, nReorders;
+ // start the manager
+ p = Llb_Nonlin4Alloc( dd, vParts, bCurrent, vVars2Q );
+ // remove singles
+ Llb_MgrForEachPart( p, pPart, i )
+ if ( Llb_Nonlin4HasSingletonVars(p, pPart) )
+ Llb_Nonlin4Quantify1( p, pPart );
+ // compute scores
+ Llb_Nonlin4RecomputeScores( p );
+ // iteratively quantify variables
+ while ( Llb_Nonlin4NextPartitions(p, &pPart1, &pPart2) )
+ {
+ nReorders = Cudd_ReadReorderings(dd);
+ if ( !Llb_Nonlin4Quantify2( p, pPart1, pPart2 ) )
+ {
+ Llb_Nonlin4Free( p );
+ return NULL;
+ }
+ if ( nReorders < Cudd_ReadReorderings(dd) )
+ Llb_Nonlin4RecomputeScores( p );
+ else
+ Llb_Nonlin4VerifyScores( p );
+ }
+ // load partitions
+ bFunc = Cudd_ReadOne(p->dd); Cudd_Ref( bFunc );
+ Llb_MgrForEachPart( p, pPart, i )
+ {
+ bFunc = Cudd_bddAnd( p->dd, bTemp = bFunc, pPart->bFunc ); Cudd_Ref( bFunc );
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ }
+// nSuppMax = p->nSuppMax;
+ Llb_Nonlin4Free( p );
+ // return
+ Cudd_Deref( bFunc );
+ return bFunc;
+}
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/aig/llb/llb4Map.c b/src/aig/llb/llb4Map.c
new file mode 100644
index 00000000..9dabb19d
--- /dev/null
+++ b/src/aig/llb/llb4Map.c
@@ -0,0 +1,123 @@
+/**CFile****************************************************************
+
+ FileName [llb2Map.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [BDD based reachability.]
+
+ Synopsis [Non-linear quantification scheduling.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - June 20, 2005.]
+
+ Revision [$Id: llb2Map.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "llbInt.h"
+#include "abc.h"
+#include "if.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Returns internal nodes used in the mapping.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Int_t * Llb_AigMap( Aig_Man_t * pAig, int nLutSize, int nLutMin )
+{
+ extern Abc_Ntk_t * Abc_NtkFromAigPhase( Aig_Man_t * pMan );
+ extern If_Man_t * Abc_NtkToIf( Abc_Ntk_t * pNtk, If_Par_t * pPars );
+ extern void Gia_ManSetIfParsDefault( If_Par_t * pPars );
+ If_Par_t Pars, * pPars = &Pars;
+ If_Man_t * pIfMan;
+ If_Obj_t * pAnd;
+ Abc_Ntk_t * pNtk;
+ Abc_Obj_t * pNode;
+ Vec_Int_t * vNodes;
+ Aig_Obj_t * pObj;
+ int i;
+
+ // create ABC network
+ pNtk = Abc_NtkFromAigPhase( pAig );
+ assert( Abc_NtkIsStrash(pNtk) );
+
+ // derive mapping parameters
+ Gia_ManSetIfParsDefault( pPars );
+ pPars->nLutSize = nLutSize;
+
+ // get timing information
+ pPars->pTimesArr = Abc_NtkGetCiArrivalFloats(pNtk);
+ pPars->pTimesReq = NULL;
+
+ // perform LUT mapping
+ pIfMan = Abc_NtkToIf( pNtk, pPars );
+ if ( pIfMan == NULL )
+ {
+ Abc_NtkDelete( pNtk );
+ return NULL;
+ }
+ if ( !If_ManPerformMapping( pIfMan ) )
+ {
+ Abc_NtkDelete( pNtk );
+ If_ManStop( pIfMan );
+ return NULL;
+ }
+
+ // mark nodes in the AIG used in the mapping
+ Aig_ManCleanMarkA( pAig );
+ Aig_ManForEachNode( pAig, pObj, i )
+ {
+ pNode = (Abc_Obj_t *)pObj->pData;
+ if ( pNode == NULL )
+ continue;
+ pAnd = (If_Obj_t *)pNode->pCopy;
+ if ( pAnd == NULL )
+ continue;
+ if ( pAnd->nRefs > 0 && (int)If_ObjCutBest(pAnd)->nLeaves >= nLutMin )
+ pObj->fMarkA = 1;
+ }
+ Abc_NtkDelete( pNtk );
+ If_ManStop( pIfMan );
+
+ // unmark flop drivers
+ Saig_ManForEachLi( pAig, pObj, i )
+ Aig_ObjFanin0(pObj)->fMarkA = 0;
+
+ // collect mapping
+ vNodes = Vec_IntAlloc( 100 );
+ Aig_ManForEachNode( pAig, pObj, i )
+ if ( pObj->fMarkA )
+ Vec_IntPush( vNodes, Aig_ObjId(pObj) );
+ Aig_ManCleanMarkA( pAig );
+ return vNodes;
+}
+
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/aig/llb/llb4Nonlin.c b/src/aig/llb/llb4Nonlin.c
new file mode 100644
index 00000000..1a6f538c
--- /dev/null
+++ b/src/aig/llb/llb4Nonlin.c
@@ -0,0 +1,914 @@
+/**CFile****************************************************************
+
+ FileName [llb2Nonlin.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [BDD based reachability.]
+
+ Synopsis [Non-linear quantification scheduling.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - June 20, 2005.]
+
+ Revision [$Id: llb2Nonlin.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "llbInt.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+typedef struct Llb_Mnx_t_ Llb_Mnx_t;
+struct Llb_Mnx_t_
+{
+ // user info
+ Aig_Man_t * pAig; // AIG manager
+ Gia_ParLlb_t * pPars; // parameters
+
+ // intermediate BDDs
+ DdManager * dd; // BDD manager
+ DdNode * bBad; // bad states in terms of CIs
+ DdNode * bReached; // reached states
+ DdNode * bCurrent; // from states
+ DdNode * bNext; // to states
+ Vec_Ptr_t * vRings; // onion rings in ddR
+ Vec_Ptr_t * vRoots; // BDDs for partitions
+
+ // structural info
+ Vec_Int_t * vOrder; // for each object ID, its BDD variable number or -1
+ Vec_Int_t * vVars2Q; // 1 if variable is quantifiable; 0 othervise
+
+ int timeImage;
+ int timeRemap;
+ int timeReo;
+ int timeOther;
+ int timeTotal;
+};
+
+static inline int Llb_MnxBddVar( Vec_Int_t * vOrder, Aig_Obj_t * pObj ) { return Vec_IntEntry(vOrder, Aig_ObjId(pObj)); }
+
+//extern int timeBuild, timeAndEx, timeOther;
+//extern int nSuppMax;
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Computes bad in working manager.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4ComputeBad( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder )
+{
+ Vec_Ptr_t * vNodes;
+ DdNode * bBdd, * bBdd0, * bBdd1, * bTemp, * bResult;
+ Aig_Obj_t * pObj;
+ int i;
+ Aig_ManCleanData( pAig );
+ // assign elementary variables
+ Aig_ManConst1(pAig)->pData = Cudd_ReadOne(dd);
+ Aig_ManForEachPi( pAig, pObj, i )
+ pObj->pData = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObj) );
+ // compute internal nodes
+ vNodes = Aig_ManDfsNodes( pAig, (Aig_Obj_t **)Vec_PtrArray(pAig->vPos), Saig_ManPoNum(pAig) );
+ Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i )
+ {
+ if ( !Aig_ObjIsNode(pObj) )
+ continue;
+ bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) );
+ bBdd1 = Cudd_NotCond( (DdNode *)Aig_ObjFanin1(pObj)->pData, Aig_ObjFaninC1(pObj) );
+ bBdd = Cudd_bddAnd( dd, bBdd0, bBdd1 );
+ if ( bBdd == NULL )
+ {
+ Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i )
+ if ( Aig_ObjIsNode(pObj) && pObj->pData != NULL )
+ Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData );
+ Vec_PtrFree( vNodes );
+ return NULL;
+ }
+ Cudd_Ref( bBdd );
+ pObj->pData = bBdd;
+ }
+ // quantify PIs of each PO
+ bResult = Cudd_ReadLogicZero( dd ); Cudd_Ref( bResult );
+ Saig_ManForEachPo( pAig, pObj, i )
+ {
+ bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) );
+ bResult = Cudd_bddOr( dd, bTemp = bResult, bBdd0 );
+ if ( bResult == NULL )
+ {
+ Cudd_RecursiveDeref( dd, bTemp );
+ break;
+ }
+ Cudd_Ref( bResult );
+ Cudd_RecursiveDeref( dd, bTemp );
+ }
+ // deref
+ Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i )
+ if ( Aig_ObjIsNode(pObj) && pObj->pData != NULL )
+ Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData );
+ Vec_PtrFree( vNodes );
+ if ( bResult )
+ Cudd_Deref( bResult );
+//if ( bResult )
+//printf( "Bad state = %d.\n", Cudd_DagSize(bResult) );
+ return bResult;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Derives BDDs for the partitions.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Ptr_t * Llb_Nonlin4DerivePartitions( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder )
+{
+ Vec_Ptr_t * vRoots;
+ Aig_Obj_t * pObj;
+ DdNode * bBdd, * bBdd0, * bBdd1, * bPart;
+ int i;
+ Aig_ManCleanData( pAig );
+ // assign elementary variables
+ Aig_ManConst1(pAig)->pData = Cudd_ReadOne(dd);
+ Aig_ManForEachPi( pAig, pObj, i )
+ pObj->pData = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObj) );
+ Aig_ManForEachNode( pAig, pObj, i )
+ if ( Llb_MnxBddVar(vOrder, pObj) >= 0 )
+ {
+ pObj->pData = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObj) );
+ Cudd_Ref( (DdNode *)pObj->pData );
+ }
+ Saig_ManForEachLi( pAig, pObj, i )
+ pObj->pData = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObj) );
+ // compute intermediate BDDs
+ vRoots = Vec_PtrAlloc( 100 );
+ Aig_ManForEachNode( pAig, pObj, i )
+ {
+ bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) );
+ bBdd1 = Cudd_NotCond( (DdNode *)Aig_ObjFanin1(pObj)->pData, Aig_ObjFaninC1(pObj) );
+ bBdd = Cudd_bddAnd( dd, bBdd0, bBdd1 );
+ if ( bBdd == NULL )
+ goto finish;
+ Cudd_Ref( bBdd );
+ if ( pObj->pData == NULL )
+ {
+ pObj->pData = bBdd;
+ continue;
+ }
+ // create new partition
+ bPart = Cudd_bddXnor( dd, (DdNode *)pObj->pData, bBdd );
+ if ( bPart == NULL )
+ goto finish;
+ Cudd_Ref( bPart );
+ Cudd_RecursiveDeref( dd, bBdd );
+ Vec_PtrPush( vRoots, bPart );
+//printf( "%d ", Cudd_DagSize(bPart) );
+ }
+ // compute register output BDDs
+ Saig_ManForEachLi( pAig, pObj, i )
+ {
+ bBdd0 = Cudd_NotCond( (DdNode *)Aig_ObjFanin0(pObj)->pData, Aig_ObjFaninC0(pObj) );
+ bPart = Cudd_bddXnor( dd, (DdNode *)pObj->pData, bBdd0 );
+ if ( bPart == NULL )
+ goto finish;
+ Cudd_Ref( bPart );
+ Vec_PtrPush( vRoots, bPart );
+//printf( "%d ", Cudd_DagSize(bPart) );
+ }
+//printf( "\n" );
+ Aig_ManForEachNode( pAig, pObj, i )
+ Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData );
+ return vRoots;
+ // early termination
+finish:
+ Aig_ManForEachNode( pAig, pObj, i )
+ if ( pObj->pData )
+ Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData );
+ Vec_PtrForEachEntry( DdNode *, vRoots, bPart, i )
+ Cudd_RecursiveDeref( dd, bPart );
+ Vec_PtrFree( vRoots );
+ return NULL;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Find simple variable ordering.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Int_t * Llb_Nonlin4CreateOrderSimple( Aig_Man_t * pAig )
+{
+ Vec_Int_t * vOrder;
+ Aig_Obj_t * pObj;
+ int i, Counter = 0;
+ vOrder = Vec_IntStartFull( Aig_ManObjNumMax(pAig) );
+ Aig_ManForEachPi( pAig, pObj, i )
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), Counter++ );
+ Saig_ManForEachLi( pAig, pObj, i )
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), Counter++ );
+ return vOrder;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Find good static variable ordering.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4CreateOrderSmart_rec( Aig_Man_t * pAig, Aig_Obj_t * pObj, Vec_Int_t * vOrder, int * pCounter )
+{
+ Aig_Obj_t * pFanin0, * pFanin1;
+ if ( Aig_ObjIsTravIdCurrent(pAig, pObj) )
+ return;
+ Aig_ObjSetTravIdCurrent( pAig, pObj );
+ assert( Llb_MnxBddVar(vOrder, pObj) < 0 );
+ if ( Aig_ObjIsPi(pObj) )
+ {
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), (*pCounter)++ );
+ return;
+ }
+ // try fanins with higher level first
+ pFanin0 = Aig_ObjFanin0(pObj);
+ pFanin1 = Aig_ObjFanin1(pObj);
+// if ( pFanin0->Level > pFanin1->Level || (pFanin0->Level == pFanin1->Level && pFanin0->Id < pFanin1->Id) )
+ if ( pFanin0->Level > pFanin1->Level )
+ {
+ Llb_Nonlin4CreateOrderSmart_rec( pAig, pFanin0, vOrder, pCounter );
+ Llb_Nonlin4CreateOrderSmart_rec( pAig, pFanin1, vOrder, pCounter );
+ }
+ else
+ {
+ Llb_Nonlin4CreateOrderSmart_rec( pAig, pFanin1, vOrder, pCounter );
+ Llb_Nonlin4CreateOrderSmart_rec( pAig, pFanin0, vOrder, pCounter );
+ }
+ if ( pObj->fMarkA )
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), (*pCounter)++ );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Collect nodes with the given fanout count.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Int_t * Llb_Nonlin4CollectHighRefNodes( Aig_Man_t * pAig, int nFans )
+{
+ Vec_Int_t * vNodes;
+ Aig_Obj_t * pObj;
+ int i;
+ Aig_ManCleanMarkA( pAig );
+ Aig_ManForEachNode( pAig, pObj, i )
+ if ( Aig_ObjRefs(pObj) >= nFans )
+ pObj->fMarkA = 1;
+ // unmark flop drivers
+ Saig_ManForEachLi( pAig, pObj, i )
+ Aig_ObjFanin0(pObj)->fMarkA = 0;
+ // collect mapping
+ vNodes = Vec_IntAlloc( 100 );
+ Aig_ManForEachNode( pAig, pObj, i )
+ if ( pObj->fMarkA )
+ Vec_IntPush( vNodes, Aig_ObjId(pObj) );
+ Aig_ManCleanMarkA( pAig );
+ return vNodes;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Find good static variable ordering.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Int_t * Llb_Nonlin4CreateOrderSmart( Aig_Man_t * pAig )
+{
+ Vec_Int_t * vNodes = NULL;
+ Vec_Int_t * vOrder;
+ Aig_Obj_t * pObj;
+ int i, Counter = 0;
+/*
+ // mark internal nodes to be used
+ Aig_ManCleanMarkA( pAig );
+ vNodes = Llb_Nonlin4CollectHighRefNodes( pAig, 4 );
+ Aig_ManForEachNodeVec( pAig, vNodes, pObj, i )
+ pObj->fMarkA = 1;
+printf( "Techmapping added %d pivots.\n", Vec_IntSize(vNodes) );
+*/
+
+ // collect nodes in the order
+ vOrder = Vec_IntStartFull( Aig_ManObjNumMax(pAig) );
+ Aig_ManIncrementTravId( pAig );
+ Aig_ObjSetTravIdCurrent( pAig, Aig_ManConst1(pAig) );
+ Saig_ManForEachLi( pAig, pObj, i )
+ {
+ Llb_Nonlin4CreateOrderSmart_rec( pAig, Aig_ObjFanin0(pObj), vOrder, &Counter );
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), Counter++ );
+ }
+ Aig_ManForEachPi( pAig, pObj, i )
+ if ( Llb_MnxBddVar(vOrder, pObj) < 0 )
+ Vec_IntWriteEntry( vOrder, Aig_ObjId(pObj), Counter++ );
+ assert( Counter <= Aig_ManPiNum(pAig) + Aig_ManRegNum(pAig) + (vNodes?Vec_IntSize(vNodes):0) );
+ Aig_ManCleanMarkA( pAig );
+ Vec_IntFreeP( &vNodes );
+ return vOrder;
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Creates quantifiable varaibles for both types of traversal.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Vec_Int_t * Llb_Nonlin4CreateVars2Q( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder, int fForward )
+{
+ Vec_Int_t * vVars2Q;
+ Aig_Obj_t * pObj;
+ int i;
+ vVars2Q = Vec_IntAlloc( 0 );
+ Vec_IntFill( vVars2Q, Cudd_ReadSize(dd), 1 );
+ if ( fForward )
+ {
+ Saig_ManForEachLi( pAig, pObj, i )
+ Vec_IntWriteEntry( vVars2Q, Llb_MnxBddVar(vOrder, pObj), 0 );
+ }
+ else
+ {
+ Aig_ManForEachPi( pAig, pObj, i )
+ Vec_IntWriteEntry( vVars2Q, Llb_MnxBddVar(vOrder, pObj), 0 );
+ }
+ return vVars2Q;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Compute initial state in terms of current state variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4SetupVarMap( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder )
+{
+ DdNode ** pVarsX, ** pVarsY;
+ Aig_Obj_t * pObjLo, * pObjLi;
+ int i;
+ pVarsX = ABC_ALLOC( DdNode *, Cudd_ReadSize(dd) );
+ pVarsY = ABC_ALLOC( DdNode *, Cudd_ReadSize(dd) );
+ Saig_ManForEachLiLo( pAig, pObjLo, pObjLi, i )
+ {
+ pVarsX[i] = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObjLo) );
+ pVarsY[i] = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObjLi) );
+ }
+ Cudd_SetVarMap( dd, pVarsX, pVarsY, Aig_ManRegNum(pAig) );
+ ABC_FREE( pVarsX );
+ ABC_FREE( pVarsY );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Compute initial state in terms of current state variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4ComputeInitState( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder )
+{
+ Aig_Obj_t * pObj;
+ DdNode * bRes, * bVar, * bTemp;
+ int i, TimeStop;
+ TimeStop = dd->TimeStop; dd->TimeStop = 0;
+ bRes = Cudd_ReadOne( dd ); Cudd_Ref( bRes );
+ Saig_ManForEachLo( pAig, pObj, i )
+ {
+ bVar = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObj) );
+ bRes = Cudd_bddAnd( dd, bTemp = bRes, Cudd_Not(bVar) ); Cudd_Ref( bRes );
+ Cudd_RecursiveDeref( dd, bTemp );
+ }
+ Cudd_Deref( bRes );
+ dd->TimeStop = TimeStop;
+ return bRes;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Compute initial state in terms of current state variables.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+DdNode * Llb_Nonlin4ComputeCube( DdManager * dd, Aig_Man_t * pAig, Vec_Int_t * vOrder, char * pValues )
+{
+ Aig_Obj_t * pObj, * pObjLi;
+ DdNode * bRes, * bVar, * bTemp;
+ int i, TimeStop;
+ TimeStop = dd->TimeStop; dd->TimeStop = 0;
+ bRes = Cudd_ReadOne( dd ); Cudd_Ref( bRes );
+ Saig_ManForEachLo( pAig, pObj, i )
+ {
+ if ( pValues[Llb_MnxBddVar(vOrder, pObj)] == 2 )
+ continue;
+ // get the correspoding flop input variable
+ pObjLi = Saig_ObjLoToLi(pAig, pObj);
+ bVar = Cudd_bddIthVar( dd, Llb_MnxBddVar(vOrder, pObjLi) );
+ if ( pValues[Llb_MnxBddVar(vOrder, pObj)] == 0 )
+ bVar = Cudd_Not(bVar);
+ // create cube
+ bRes = Cudd_bddAnd( dd, bTemp = bRes, bVar ); Cudd_Ref( bRes );
+ Cudd_RecursiveDeref( dd, bTemp );
+ }
+ Cudd_Deref( bRes );
+ dd->TimeStop = TimeStop;
+ return bRes;
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Derives counter-example by backward reachability.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Abc_Cex_t * Llb_Nonlin4DeriveCex( Llb_Mnx_t * p )
+{
+ Abc_Cex_t * pCex;
+ Aig_Obj_t * pObj;
+ DdNode * bState, * bImage, * bOneCube, * bRing;
+ int i, v, RetValue, nPiOffset;
+ char * pValues = ABC_ALLOC( char, Cudd_ReadSize(p->dd) );
+ assert( Vec_PtrSize(p->vRings) > 0 );
+ // disable the timeout
+ p->dd->TimeStop = 0;
+
+ // update quantifiable vars
+ Vec_IntFreeP( &p->vVars2Q );
+ p->vVars2Q = Llb_Nonlin4CreateVars2Q( p->dd, p->pAig, p->vOrder, 0 );
+
+ // allocate room for the counter-example
+ pCex = Abc_CexAlloc( Saig_ManRegNum(p->pAig), Saig_ManPiNum(p->pAig), Vec_PtrSize(p->vRings) );
+ pCex->iFrame = Vec_PtrSize(p->vRings) - 1;
+ pCex->iPo = -1;
+
+ // get the last cube
+ bOneCube = Cudd_bddIntersect( p->dd, (DdNode *)Vec_PtrEntryLast(p->vRings), p->bBad ); Cudd_Ref( bOneCube );
+ RetValue = Cudd_bddPickOneCube( p->dd, bOneCube, pValues );
+ Cudd_RecursiveDeref( p->dd, bOneCube );
+ assert( RetValue );
+
+ // write PIs of counter-example
+ nPiOffset = Saig_ManRegNum(p->pAig) + Saig_ManPiNum(p->pAig) * (Vec_PtrSize(p->vRings) - 1);
+ Saig_ManForEachPi( p->pAig, pObj, i )
+ if ( pValues[Llb_MnxBddVar(p->vOrder, pObj)] == 1 )
+ Aig_InfoSetBit( pCex->pData, nPiOffset + i );
+
+ // write state in terms of NS variables
+ if ( Vec_PtrSize(p->vRings) > 1 )
+ {
+ bState = Llb_Nonlin4ComputeCube( p->dd, p->pAig, p->vOrder, pValues ); Cudd_Ref( bState );
+ }
+ // perform backward analysis
+ Vec_PtrForEachEntryReverse( DdNode *, p->vRings, bRing, v )
+ {
+ if ( v == Vec_PtrSize(p->vRings) - 1 )
+ continue;
+ // compute the next states
+ bImage = Llb_Nonlin4Image( p->dd, p->vRoots, bState, p->vVars2Q );
+ assert( bImage != NULL );
+ Cudd_Ref( bImage );
+ Cudd_RecursiveDeref( p->dd, bState );
+
+ // intersect with the previous set
+ bOneCube = Cudd_bddIntersect( p->dd, bImage, bRing ); Cudd_Ref( bOneCube );
+ Cudd_RecursiveDeref( p->dd, bImage );
+
+ // find any assignment of the BDD
+ RetValue = Cudd_bddPickOneCube( p->dd, bOneCube, pValues );
+ Cudd_RecursiveDeref( p->dd, bOneCube );
+ assert( RetValue );
+
+ // write PIs of counter-example
+ nPiOffset -= Saig_ManPiNum(p->pAig);
+ Saig_ManForEachPi( p->pAig, pObj, i )
+ if ( pValues[Llb_MnxBddVar(p->vOrder, pObj)] == 1 )
+ Aig_InfoSetBit( pCex->pData, nPiOffset + i );
+
+ // check that we get the init state
+ if ( v == 0 )
+ {
+ Saig_ManForEachLo( p->pAig, pObj, i )
+ assert( pValues[Llb_MnxBddVar(p->vOrder, pObj)] == 0 );
+ break;
+ }
+
+ // write state in terms of NS variables
+ bState = Llb_Nonlin4ComputeCube( p->dd, p->pAig, p->vOrder, pValues ); Cudd_Ref( bState );
+ }
+ assert( nPiOffset == Saig_ManRegNum(p->pAig) );
+ // update the output number
+//Abc_CexPrint( pCex );
+ RetValue = Saig_ManFindFailedPoCex( p->pAig, pCex );
+ assert( RetValue >= 0 && RetValue < Saig_ManPoNum(p->pAig) ); // invalid CEX!!!
+ pCex->iPo = RetValue;
+ // cleanup
+ ABC_FREE( pValues );
+ return pCex;
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Perform reachability with hints.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4Reachability( Llb_Mnx_t * p )
+{
+ DdNode * bAux;
+ int nIters, nBddSizeFr, nBddSizeTo, nBddSizeTo2;
+ int clkTemp, clkIter, clk = clock();
+ assert( Aig_ManRegNum(p->pAig) > 0 );
+
+ // compute time to stop
+ if ( p->pPars->TimeLimit )
+ p->pPars->TimeTarget = clock() + p->pPars->TimeLimit * CLOCKS_PER_SEC;
+ else
+ p->pPars->TimeTarget = 0;
+ // set the stop time parameter
+ p->dd->TimeStop = p->pPars->TimeTarget;
+
+ // create bad state in the ring manager
+ if ( !p->pPars->fSkipOutCheck )
+ {
+ p->bBad = Llb_Nonlin4ComputeBad( p->dd, p->pAig, p->vOrder );
+ if ( p->bBad == NULL )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during constructing the bad states.\n", p->pPars->TimeLimit );
+ p->pPars->iFrame = -1;
+ return -1;
+ }
+ Cudd_Ref( p->bBad );
+ }
+
+ // compute the starting set of states
+ p->bCurrent = Llb_Nonlin4ComputeInitState( p->dd, p->pAig, p->vOrder ); Cudd_Ref( p->bCurrent );
+ p->bReached = p->bCurrent; Cudd_Ref( p->bCurrent );
+ for ( nIters = 0; nIters < p->pPars->nIterMax; nIters++ )
+ {
+ clkIter = clock();
+ // check the runtime limit
+ if ( p->pPars->TimeLimit && clock() >= p->pPars->TimeTarget )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during image computation.\n", p->pPars->TimeLimit );
+ p->pPars->iFrame = nIters - 1;
+ return -1;
+ }
+
+ // save the onion ring
+ Vec_PtrPush( p->vRings, p->bCurrent ); Cudd_Ref( p->bCurrent );
+
+ // check it for bad states
+ if ( !p->pPars->fSkipOutCheck && !Cudd_bddLeq( p->dd, p->bCurrent, Cudd_Not(p->bBad) ) )
+ {
+ assert( p->pAig->pSeqModel == NULL );
+ if ( !p->pPars->fBackward )
+ p->pAig->pSeqModel = Llb_Nonlin4DeriveCex( p );
+ if ( !p->pPars->fSilent )
+ {
+ if ( !p->pPars->fBackward )
+ printf( "Output %d was asserted in frame %d (use \"write_counter\" to dump a witness). ", p->pAig->pSeqModel->iPo, nIters );
+ else
+ printf( "Output ??? was asserted in frame %d (counter-example is not produced). ", nIters );
+ Abc_PrintTime( 1, "Time", clock() - clk );
+ }
+ p->pPars->iFrame = nIters - 1;
+ return 0;
+ }
+
+ // compute the next states
+ clkTemp = clock();
+ p->bNext = Llb_Nonlin4Image( p->dd, p->vRoots, p->bCurrent, p->vVars2Q );
+ if ( p->bNext == NULL )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during image computation in quantification.\n", p->pPars->TimeLimit );
+ p->pPars->iFrame = nIters - 1;
+ return -1;
+ }
+ Cudd_Ref( p->bNext );
+ p->timeImage += clock() - clkTemp;
+
+ // remap into current states
+ clkTemp = clock();
+ p->bNext = Cudd_bddVarMap( p->dd, bAux = p->bNext );
+ if ( p->bNext == NULL )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during remapping next states.\n", p->pPars->TimeLimit );
+ Cudd_RecursiveDeref( p->dd, bAux );
+ p->pPars->iFrame = nIters - 1;
+ return -1;
+ }
+ Cudd_Ref( p->bNext );
+ Cudd_RecursiveDeref( p->dd, bAux );
+ p->timeRemap += clock() - clkTemp;
+
+ // collect statistics
+ if ( p->pPars->fVerbose )
+ {
+ nBddSizeFr = Cudd_DagSize( p->bCurrent );
+ nBddSizeTo = Cudd_DagSize( bAux );
+ nBddSizeTo2 = Cudd_DagSize( p->bNext );
+ }
+ Cudd_RecursiveDeref( p->dd, p->bCurrent ); p->bCurrent = NULL;
+
+ // derive new states
+ p->bCurrent = Cudd_bddAnd( p->dd, p->bNext, Cudd_Not(p->bReached) );
+ if ( p->bCurrent == NULL )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during image computation in transfer 1.\n", p->pPars->TimeLimit );
+ p->pPars->iFrame = nIters - 1;
+ return -1;
+ }
+ Cudd_Ref( p->bCurrent );
+ Cudd_RecursiveDeref( p->dd, p->bNext ); p->bNext = NULL;
+ if ( Cudd_IsConstant(p->bCurrent) )
+ break;
+
+ // add to the reached set
+ p->bReached = Cudd_bddOr( p->dd, bAux = p->bReached, p->bCurrent );
+ if ( p->bReached == NULL )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached timeout (%d seconds) during image computation in transfer 1.\n", p->pPars->TimeLimit );
+ p->pPars->iFrame = nIters - 1;
+ Cudd_RecursiveDeref( p->dd, bAux );
+ return -1;
+ }
+ Cudd_Ref( p->bReached );
+ Cudd_RecursiveDeref( p->dd, bAux );
+
+ // report the results
+ if ( p->pPars->fVerbose )
+ {
+ printf( "I =%5d : ", nIters );
+ printf( "Fr =%7d ", nBddSizeFr );
+ printf( "ImNs =%7d ", nBddSizeTo );
+ printf( "ImCs =%7d ", nBddSizeTo2 );
+ printf( "Rea =%7d ", Cudd_DagSize(p->bReached) );
+ printf( "(%4d %4d) ", Cudd_ReadReorderings(p->dd), Cudd_ReadGarbageCollections(p->dd) );
+ Abc_PrintTime( 1, "T", clock() - clkIter );
+ }
+/*
+ if ( pPars->fVerbose )
+ {
+ double nMints = Cudd_CountMinterm(p->dd, bReached, Saig_ManRegNum(p->pAig) );
+// Extra_bddPrint( p->dd, bReached );printf( "\n" );
+ printf( "Reachable states = %.0f. (Ratio = %.4f %%)\n", nMints, 100.0*nMints/pow(2.0, Saig_ManRegNum(p->pAig)) );
+ fflush( stdout );
+ }
+*/
+ if ( nIters == p->pPars->nIterMax - 1 )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Reached limit on the number of timeframes (%d).\n", p->pPars->nIterMax );
+ p->pPars->iFrame = nIters;
+ return -1;
+ }
+ }
+
+ // report the stats
+ if ( p->pPars->fVerbose )
+ {
+ double nMints = Cudd_CountMinterm(p->dd, p->bReached, Saig_ManRegNum(p->pAig) );
+ if ( p->bCurrent && Cudd_IsConstant(p->bCurrent) )
+ printf( "Reachability analysis completed after %d frames.\n", nIters );
+ else
+ printf( "Reachability analysis is stopped after %d frames.\n", nIters );
+ printf( "Reachable states = %.0f. (Ratio = %.4f %%)\n", nMints, 100.0*nMints/pow(2.0, Saig_ManRegNum(p->pAig)) );
+ fflush( stdout );
+ }
+ if ( p->bCurrent == NULL || !Cudd_IsConstant(p->bCurrent) )
+ {
+ if ( !p->pPars->fSilent )
+ printf( "Verified only for states reachable in %d frames. ", nIters );
+ p->pPars->iFrame = p->pPars->nIterMax;
+ return -1; // undecided
+ }
+ // report
+ if ( !p->pPars->fSilent )
+ printf( "The miter is proved unreachable after %d iterations. ", nIters );
+ p->pPars->iFrame = nIters - 1;
+ Abc_PrintTime( 1, "Time", clock() - clk );
+ return 1; // unreachable
+}
+
+/**Function*************************************************************
+
+ Synopsis [Reorders BDDs in the working manager.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_Nonlin4Reorder( DdManager * dd, int fTwice, int fVerbose )
+{
+ int clk = clock();
+ if ( fVerbose )
+ Abc_Print( 1, "Reordering... Before =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
+ Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 100 );
+ if ( fVerbose )
+ Abc_Print( 1, "After =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
+ if ( fTwice )
+ {
+ Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 100 );
+ if ( fVerbose )
+ Abc_Print( 1, "After =%5d. ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
+ }
+ if ( fVerbose )
+ Abc_PrintTime( 1, "Time", clock() - clk );
+}
+
+/**Function*************************************************************
+
+ Synopsis []
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Llb_Mnx_t * Llb_MnxStart( Aig_Man_t * pAig, Gia_ParLlb_t * pPars )
+{
+ Llb_Mnx_t * p;
+ p = ABC_CALLOC( Llb_Mnx_t, 1 );
+ p->pAig = pAig;
+ p->pPars = pPars;
+// p->vOrder = Llb_Nonlin4CreateOrderSimple( pAig );
+ p->vOrder = Llb_Nonlin4CreateOrderSmart( pAig );
+ p->dd = Cudd_Init( Vec_IntSize(p->vOrder), 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
+ Llb_Nonlin4SetupVarMap( p->dd, pAig, p->vOrder );
+ Cudd_AutodynEnable( p->dd, CUDD_REORDER_SYMM_SIFT );
+ p->vVars2Q = Llb_Nonlin4CreateVars2Q( p->dd, pAig, p->vOrder, 1 );
+ p->vRoots = Llb_Nonlin4DerivePartitions( p->dd, pAig, p->vOrder );
+ p->vRings = Vec_PtrAlloc( 100 );
+ if ( pPars->fReorder )
+ Llb_Nonlin4Reorder( p->dd, 0, 1 );
+ return p;
+}
+
+/**Function*************************************************************
+
+ Synopsis []
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Llb_MnxStop( Llb_Mnx_t * p )
+{
+ DdNode * bTemp;
+ int i;
+ if ( p->pPars->fVerbose )
+ {
+ p->timeReo = Cudd_ReadReorderingTime(p->dd);
+ p->timeOther = p->timeTotal - p->timeImage - p->timeRemap;
+ ABC_PRTP( "Image ", p->timeImage, p->timeTotal );
+ ABC_PRTP( "Remap ", p->timeRemap, p->timeTotal );
+ ABC_PRTP( "Other ", p->timeOther, p->timeTotal );
+ ABC_PRTP( "TOTAL ", p->timeTotal, p->timeTotal );
+ ABC_PRTP( " reo ", p->timeReo, p->timeTotal );
+ }
+ // remove BDDs
+ if ( p->bBad )
+ Cudd_RecursiveDeref( p->dd, p->bBad );
+ if ( p->bReached )
+ Cudd_RecursiveDeref( p->dd, p->bReached );
+ if ( p->bCurrent )
+ Cudd_RecursiveDeref( p->dd, p->bCurrent );
+ if ( p->bNext )
+ Cudd_RecursiveDeref( p->dd, p->bNext );
+ Vec_PtrForEachEntry( DdNode *, p->vRings, bTemp, i )
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ Vec_PtrForEachEntry( DdNode *, p->vRoots, bTemp, i )
+ Cudd_RecursiveDeref( p->dd, bTemp );
+ // remove arrays
+ Vec_PtrFree( p->vRings );
+ Vec_PtrFree( p->vRoots );
+ Extra_StopManager( p->dd );
+ Vec_IntFreeP( &p->vOrder );
+ Vec_IntFreeP( &p->vVars2Q );
+ ABC_FREE( p );
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Finds balanced cut.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Llb_Nonlin4CoreReach( Aig_Man_t * pAig, Gia_ParLlb_t * pPars )
+{
+ Llb_Mnx_t * pMnn;
+ int RetValue = -1;
+ if ( pPars->fVerbose )
+ Aig_ManPrintStats( pAig );
+ if ( !pPars->fSkipReach )
+ {
+ int clk = clock();
+ pMnn = Llb_MnxStart( pAig, pPars );
+ RetValue = Llb_Nonlin4Reachability( pMnn );
+ pMnn->timeTotal = clock() - clk;
+ Llb_MnxStop( pMnn );
+ }
+ return RetValue;
+}
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/aig/llb/llbInt.h b/src/aig/llb/llbInt.h
index 496d975d..357ddb5c 100644
--- a/src/aig/llb/llbInt.h
+++ b/src/aig/llb/llbInt.h
@@ -176,12 +176,20 @@ extern DdManager * Llb_NonlinImageStart( Aig_Man_t * pAig, Vec_Ptr_t * vLeav
extern DdNode * Llb_NonlinImageCompute( DdNode * bCurrent, int fReorder, int fDrop, int fVerbose, int * pOrder );
extern void Llb_NonlinImageQuit();
-/*=== llb3Image.c ======================================================*/
+/*=== llb3Image.c =======================================================*/
extern DdNode * Llb_NonlinImage( Aig_Man_t * pAig, Vec_Ptr_t * vLeaves, Vec_Ptr_t * vRoots, int * pVars2Q,
DdManager * dd, DdNode * bCurrent, int fReorder, int fVerbose, int * pOrder, int Limit, int TimeTarget );
/*=== llb3Nonlin.c ======================================================*/
extern DdNode * Llb_NonlinComputeInitState( Aig_Man_t * pAig, DdManager * dd );
+/*=== llb4Image.c =======================================================*/
+extern DdNode * Llb_Nonlin4Image( DdManager * dd, Vec_Ptr_t * vParts, DdNode * bCurrent, Vec_Int_t * vVars2Q );
+/*=== llb4Map.c =========================================================*/
+//extern Vec_Int_t * Llb_AigMap( Aig_Man_t * pAig, int nLutSize, int nLutMin );
+/*=== llb4Nonlin.c ======================================================*/
+extern int Llb_Nonlin4CoreReach( Aig_Man_t * pAig, Gia_ParLlb_t * pPars );
+
+
ABC_NAMESPACE_HEADER_END
diff --git a/src/aig/llb/module.make b/src/aig/llb/module.make
index 56beca25..028e9fe4 100644
--- a/src/aig/llb/module.make
+++ b/src/aig/llb/module.make
@@ -16,4 +16,6 @@ SRC += src/aig/llb/llb.c \
src/aig/llb/llb2Flow.c \
src/aig/llb/llb2Image.c \
src/aig/llb/llb3Image.c \
- src/aig/llb/llb3Nonlin.c
+ src/aig/llb/llb3Nonlin.c \
+ src/aig/llb/llb4Image.c \
+ src/aig/llb/llb4Nonlin.c
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index b100ba19..99d44937 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -373,6 +373,7 @@ static int Abc_CommandAbc9Posplit ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandAbc9ReachM ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReachP ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9ReachN ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int Abc_CommandAbc9ReachY ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Undo ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Test ( Abc_Frame_t * pAbc, int argc, char ** argv );
@@ -784,6 +785,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "ABC9", "&reachm", Abc_CommandAbc9ReachM, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&reachp", Abc_CommandAbc9ReachP, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&reachn", Abc_CommandAbc9ReachN, 0 );
+ Cmd_CommandAdd( pAbc, "ABC9", "&reachy", Abc_CommandAbc9ReachY, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&undo", Abc_CommandAbc9Undo, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&test", Abc_CommandAbc9Test, 0 );
@@ -8528,6 +8530,12 @@ int Abc_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
Aig_ManTerSimulate( pAig );
Aig_ManStop( pAig );
}
+*/
+/*
+{
+ extern void Ssm_ManExperiment( char * pFileIn, char * pFileOut );
+ Ssm_ManExperiment( "m\\big1.ssim", "m\\big1_.ssim" );
+}
*/
return 0;
usage:
@@ -27957,6 +27965,137 @@ usage:
return 1;
}
+/**Function*************************************************************
+
+ Synopsis []
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Abc_CommandAbc9ReachY( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+ Gia_ParLlb_t Pars, * pPars = &Pars;
+ Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
+ Aig_Man_t * pMan;
+ char * pLogFileName = NULL;
+ int c;
+ extern int Llb_Nonlin4CoreReach( Aig_Man_t * pAig, Gia_ParLlb_t * pPars );
+
+ // set defaults
+ Llb_ManSetDefaultParams( pPars );
+ pPars->fReorder = 0;
+ Extra_UtilGetoptReset();
+ while ( ( c = Extra_UtilGetopt( argc, argv, "BFTLryzvwh" ) ) != EOF )
+ {
+ switch ( c )
+ {
+ case 'B':
+ if ( globalUtilOptind >= argc )
+ {
+ Abc_Print( -1, "Command line switch \"-B\" should be followed by an integer.\n" );
+ goto usage;
+ }
+ pPars->nBddMax = atoi(argv[globalUtilOptind]);
+ globalUtilOptind++;
+ if ( pPars->nBddMax < 0 )
+ goto usage;
+ break;
+ case 'F':
+ if ( globalUtilOptind >= argc )
+ {
+ Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
+ goto usage;
+ }
+ pPars->nIterMax = atoi(argv[globalUtilOptind]);
+ globalUtilOptind++;
+ if ( pPars->nIterMax < 0 )
+ goto usage;
+ break;
+ case 'T':
+ if ( globalUtilOptind >= argc )
+ {
+ Abc_Print( -1, "Command line switch \"-T\" should be followed by an integer.\n" );
+ goto usage;
+ }
+ pPars->TimeLimit = atoi(argv[globalUtilOptind]);
+ globalUtilOptind++;
+ if ( pPars->TimeLimit < 0 )
+ goto usage;
+ break;
+ case 'L':
+ if ( globalUtilOptind >= argc )
+ {
+ Abc_Print( -1, "Command line switch \"-L\" should be followed by a file name.\n" );
+ goto usage;
+ }
+ pLogFileName = argv[globalUtilOptind];
+ globalUtilOptind++;
+ break;
+ case 'r':
+ pPars->fReorder ^= 1;
+ break;
+ case 'y':
+ pPars->fSkipOutCheck ^= 1;
+ break;
+ case 'z':
+ pPars->fSkipReach ^= 1;
+ break;
+ case 'v':
+ pPars->fVerbose ^= 1;
+ break;
+ case 'w':
+ pPars->fVeryVerbose ^= 1;
+ break;
+ case 'h':
+ goto usage;
+ default:
+ goto usage;
+ }
+ }
+ if ( pAbc->pGia == NULL )
+ {
+ Abc_Print( -1, "Abc_CommandAbc9ReachN(): There is no AIG.\n" );
+ return 1;
+ }
+ if ( Gia_ManRegNum(pAbc->pGia) == 0 )
+ {
+ Abc_Print( -1, "Abc_CommandAbc9ReachN(): The current AIG has no latches.\n" );
+ return 0;
+ }
+ if ( Gia_ManObjNum(pAbc->pGia) >= (1<<16) )
+ {
+ Abc_Print( -1, "Abc_CommandAbc9ReachN(): Currently cannot handle AIGs with more than %d objects.\n", (1<<16) );
+ return 0;
+ }
+ pMan = Gia_ManToAigSimple( pAbc->pGia );
+ pAbc->Status = Llb_Nonlin4CoreReach( pMan, pPars );
+ pAbc->nFrames = pPars->iFrame;
+ Abc_FrameReplaceCex( pAbc, &pMan->pSeqModel );
+ if ( pLogFileName )
+ Abc_NtkWriteLogFile( pLogFileName, pAbc->pCex, pAbc->Status, pAbc->nFrames, "&reachn" );
+ Aig_ManStop( pMan );
+ return 0;
+
+usage:
+ Abc_Print( -2, "usage: &reachy [-BFT num] [-L file] [-ryzvh]\n" );
+ Abc_Print( -2, "\t model checking via BDD-based reachability (non-linear-QS-based)\n" );
+ Abc_Print( -2, "\t-B num : the BDD node increase when hints kick in [default = %d]\n", pPars->nBddMax );
+ Abc_Print( -2, "\t-F num : max number of reachability iterations [default = %d]\n", pPars->nIterMax );
+ Abc_Print( -2, "\t-T num : approximate time limit in seconds (0=infinite) [default = %d]\n", pPars->TimeLimit );
+ Abc_Print( -2, "\t-L file: the log file name [default = %s]\n", pLogFileName ? pLogFileName : "no logging" );
+ Abc_Print( -2, "\t-r : enable additional BDD var reordering before image [default = %s]\n", pPars->fReorder? "yes": "no" );
+ Abc_Print( -2, "\t-y : skip checking property outputs [default = %s]\n", pPars->fSkipOutCheck? "yes": "no" );
+ Abc_Print( -2, "\t-z : skip reachability (run preparation phase only) [default = %s]\n", pPars->fSkipReach? "yes": "no" );
+ Abc_Print( -2, "\t-v : prints verbose information [default = %s]\n", pPars->fVerbose? "yes": "no" );
+// Abc_Print( -2, "\t-w : prints additional information [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );
+ Abc_Print( -2, "\t-h : print the command usage\n");
+ return 1;
+}
+
/**Function*************************************************************
Synopsis []
diff --git a/src/base/abci/abcIf.c b/src/base/abci/abcIf.c
index ce1366de..7f7c68c4 100644
--- a/src/base/abci/abcIf.c
+++ b/src/base/abci/abcIf.c
@@ -30,7 +30,7 @@ ABC_NAMESPACE_IMPL_START
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
-static If_Man_t * Abc_NtkToIf( Abc_Ntk_t * pNtk, If_Par_t * pPars );
+extern If_Man_t * Abc_NtkToIf( Abc_Ntk_t * pNtk, If_Par_t * pPars );
static Abc_Ntk_t * Abc_NtkFromIf( If_Man_t * pIfMan, Abc_Ntk_t * pNtk );
extern Abc_Obj_t * Abc_NodeFromIf_rec( Abc_Ntk_t * pNtkNew, If_Man_t * pIfMan, If_Obj_t * pIfObj, Vec_Int_t * vCover );
static Hop_Obj_t * Abc_NodeIfToHop( Hop_Man_t * pHopMan, If_Man_t * pIfMan, If_Obj_t * pIfObj );
diff --git a/src/bdd/cudd/cuddCompose.c b/src/bdd/cudd/cuddCompose.c
index e3b2e556..8dd8f8c5 100644
--- a/src/bdd/cudd/cuddCompose.c
+++ b/src/bdd/cudd/cuddCompose.c
@@ -1251,6 +1251,9 @@ cuddBddVarMapRecur(
return(Cudd_NotCond(res,F != f));
}
+ if ( manager->TimeStop && manager->TimeStop < clock() )
+ return NULL;
+
/* Split and recur on children of this node. */
T = cuddBddVarMapRecur(manager,cuddT(F));
if (T == NULL) return(NULL);
diff --git a/src/misc/vec/vecVec.h b/src/misc/vec/vecVec.h
index 83c334b4..cb3b3445 100644
--- a/src/misc/vec/vecVec.h
+++ b/src/misc/vec/vecVec.h
@@ -64,6 +64,8 @@ struct Vec_Vec_t_
for ( i = Vec_VecSize(vGlob)-1; (i >= 0) && (((vVec) = (Vec_Ptr_t*)Vec_VecEntry(vGlob, i)), 1); i-- )
#define Vec_VecForEachLevelReverseStartStop( vGlob, vVec, i, LevelStart, LevelStop ) \
for ( i = LevelStart-1; (i >= LevelStop) && (((vVec) = (Vec_Ptr_t*)Vec_VecEntry(vGlob, i)), 1); i-- )
+#define Vec_VecForEachLevelTwo( vGlob1, vGlob2, vVec1, vVec2, i ) \
+ for ( i = 0; (i < Vec_VecSize(vGlob1)) && (((vVec1) = (Vec_Ptr_t*)Vec_VecEntry(vGlob1, i)), 1) && (((vVec2) = (Vec_Ptr_t*)Vec_VecEntry(vGlob2, i)), 1); i++ )
// iterators through levels
#define Vec_VecForEachLevelInt( vGlob, vVec, i ) \
@@ -78,6 +80,8 @@ struct Vec_Vec_t_
for ( i = Vec_VecSize(vGlob)-1; (i >= 0) && (((vVec) = (Vec_Int_t*)Vec_VecEntry(vGlob, i)), 1); i-- )
#define Vec_VecForEachLevelIntReverseStartStop( vGlob, vVec, i, LevelStart, LevelStop ) \
for ( i = LevelStart-1; (i >= LevelStop) && (((vVec) = (Vec_Int_t*)Vec_VecEntry(vGlob, i)), 1); i-- )
+#define Vec_VecForEachLevelIntTwo( vGlob1, vGlob2, vVec1, vVec2, i ) \
+ for ( i = 0; (i < Vec_VecSize(vGlob1)) && (((vVec1) = (Vec_Int_t*)Vec_VecEntry(vGlob1, i)), 1) && (((vVec2) = (Vec_Int_t*)Vec_VecEntry(vGlob2, i)), 1); i++ )
// iteratores through entries
#define Vec_VecForEachEntry( Type, vGlob, pEntry, i, k ) \
--
cgit v1.2.3