From 429f52ce15d1c10e71d98d8c1388b93809a425e1 Mon Sep 17 00:00:00 2001 From: Alan Mishchenko Date: Sat, 18 Feb 2017 14:20:10 -0800 Subject: Experiments with SAT sweeping. --- abclib.dsp | 4 + src/aig/gia/gia.h | 14 +- src/aig/gia/giaEquiv.c | 2 +- src/aig/gia/giaUtil.c | 19 + src/base/wlc/wlcSim.c | 22 +- src/misc/util/utilTruth.h | 16 + src/proof/cec/cecSat.c | 862 ++++++++++++++++++++++++++++++++++++++++++++ src/proof/cec/module.make | 1 + src/sat/bmc/bmcGen.c | 18 +- src/sat/satoko/satoko.h | 2 +- src/sat/satoko/solver_api.c | 4 +- 11 files changed, 936 insertions(+), 28 deletions(-) create mode 100644 src/proof/cec/cecSat.c diff --git a/abclib.dsp b/abclib.dsp index 23c57506..99ade15e 100644 --- a/abclib.dsp +++ b/abclib.dsp @@ -5027,6 +5027,10 @@ SOURCE=.\src\proof\cec\cecPat.c # End Source File # Begin Source File +SOURCE=.\src\proof\cec\cecSat.c +# End Source File +# Begin Source File + SOURCE=.\src\proof\cec\cecSeq.c # End Source File # Begin Source File diff --git a/src/aig/gia/gia.h b/src/aig/gia/gia.h index c183432a..10804850 100644 --- a/src/aig/gia/gia.h +++ b/src/aig/gia/gia.h @@ -194,6 +194,7 @@ struct Gia_Man_t_ int MappedDelay; // delay after mapping // bit-parallel simulation int iPatsPi; + int nSimWords; Vec_Wrd_t * vSims; Vec_Wrd_t * vSimsPi; Vec_Int_t * vClassOld; @@ -982,24 +983,26 @@ static inline void Gia_ObjSetNext( Gia_Man_t * p, int Id, int Num ) { p static inline int Gia_ObjIsConst( Gia_Man_t * p, int Id ) { return Gia_ObjRepr(p, Id) == 0; } static inline int Gia_ObjIsHead( Gia_Man_t * p, int Id ) { return Gia_ObjRepr(p, Id) == GIA_VOID && Gia_ObjNext(p, Id) > 0; } -static inline int Gia_ObjIsNone( Gia_Man_t * p, int Id ) { return Gia_ObjRepr(p, Id) == GIA_VOID && Gia_ObjNext(p, Id) == 0; } -static inline int Gia_ObjIsTail( Gia_Man_t * p, int Id ) { return (Gia_ObjRepr(p, Id) > 0 && Gia_ObjRepr(p, Id) != GIA_VOID) && Gia_ObjNext(p, Id) == 0; } +static inline int Gia_ObjIsNone( Gia_Man_t * p, int Id ) { return Gia_ObjRepr(p, Id) == GIA_VOID && Gia_ObjNext(p, Id) <= 0; } +static inline int Gia_ObjIsTail( Gia_Man_t * p, int Id ) { return (Gia_ObjRepr(p, Id) > 0 && Gia_ObjRepr(p, Id) != GIA_VOID) && Gia_ObjNext(p, Id) <= 0; } static inline int Gia_ObjIsClass( Gia_Man_t * p, int Id ) { return (Gia_ObjRepr(p, Id) > 0 && Gia_ObjRepr(p, Id) != GIA_VOID) || Gia_ObjNext(p, Id) > 0; } static inline int Gia_ObjHasSameRepr( Gia_Man_t * p, int i, int k ) { assert( k ); return i? (Gia_ObjRepr(p, i) == Gia_ObjRepr(p, k) && Gia_ObjRepr(p, i) != GIA_VOID) : Gia_ObjRepr(p, k) == 0; } static inline int Gia_ObjIsFailedPair( Gia_Man_t * p, int i, int k ) { assert( k ); return i? (Gia_ObjFailed(p, i) || Gia_ObjFailed(p, k)) : Gia_ObjFailed(p, k); } -static inline int Gia_ClassIsPair( Gia_Man_t * p, int i ) { assert( Gia_ObjIsHead(p, i) ); assert( Gia_ObjNext(p, i) ); return Gia_ObjNext(p, Gia_ObjNext(p, i)) == 0; } +static inline int Gia_ClassIsPair( Gia_Man_t * p, int i ) { assert( Gia_ObjIsHead(p, i) ); assert( Gia_ObjNext(p, i) ); return Gia_ObjNext(p, Gia_ObjNext(p, i)) <= 0; } static inline void Gia_ClassUndoPair( Gia_Man_t * p, int i ) { assert( Gia_ClassIsPair(p,i) ); Gia_ObjSetRepr(p, Gia_ObjNext(p, i), GIA_VOID); Gia_ObjSetNext(p, i, 0); } #define Gia_ManForEachConst( p, i ) \ for ( i = 1; i < Gia_ManObjNum(p); i++ ) if ( !Gia_ObjIsConst(p, i) ) {} else #define Gia_ManForEachClass( p, i ) \ for ( i = 1; i < Gia_ManObjNum(p); i++ ) if ( !Gia_ObjIsHead(p, i) ) {} else +#define Gia_ManForEachClass0( p, i ) \ + for ( i = 0; i < Gia_ManObjNum(p); i++ ) if ( !Gia_ObjIsHead(p, i) ) {} else #define Gia_ManForEachClassReverse( p, i ) \ for ( i = Gia_ManObjNum(p) - 1; i > 0; i-- ) if ( !Gia_ObjIsHead(p, i) ) {} else #define Gia_ClassForEachObj( p, i, iObj ) \ - for ( assert(Gia_ObjIsHead(p, i)), iObj = i; iObj; iObj = Gia_ObjNext(p, iObj) ) + for ( assert(Gia_ObjIsHead(p, i)), iObj = i; iObj > 0; iObj = Gia_ObjNext(p, iObj) ) #define Gia_ClassForEachObj1( p, i, iObj ) \ - for ( assert(Gia_ObjIsHead(p, i)), iObj = Gia_ObjNext(p, i); iObj; iObj = Gia_ObjNext(p, iObj) ) + for ( assert(Gia_ObjIsHead(p, i)), iObj = Gia_ObjNext(p, i); iObj > 0; iObj = Gia_ObjNext(p, iObj) ) static inline int Gia_ObjFoffsetId( Gia_Man_t * p, int Id ) { return Vec_IntEntry( p->vFanout, Id ); } @@ -1585,6 +1588,7 @@ extern void Gia_ManSwapPos( Gia_Man_t * p, int i ); extern Vec_Int_t * Gia_ManSaveValue( Gia_Man_t * p ); extern void Gia_ManLoadValue( Gia_Man_t * p, Vec_Int_t * vValues ); extern Vec_Int_t * Gia_ManFirstFanouts( Gia_Man_t * p ); +extern void Gia_ManDetectMuxes( Gia_Man_t * p ); /*=== giaCTas.c ===========================================================*/ typedef struct Tas_Man_t_ Tas_Man_t; diff --git a/src/aig/gia/giaEquiv.c b/src/aig/gia/giaEquiv.c index 1b0bce07..f41db898 100644 --- a/src/aig/gia/giaEquiv.c +++ b/src/aig/gia/giaEquiv.c @@ -485,7 +485,7 @@ void Gia_ManEquivPrintClasses( Gia_Man_t * p, int fVerbose, float Mem ) if ( fVerbose ) { // int Ent; - Abc_Print( 1, "Const0 = " ); + Abc_Print( 1, "Const0 (%d) = ", Counter0 ); Gia_ManForEachConst( p, i ) Abc_Print( 1, "%d ", i ); Abc_Print( 1, "\n" ); diff --git a/src/aig/gia/giaUtil.c b/src/aig/gia/giaUtil.c index c7af642e..d64c53fa 100644 --- a/src/aig/gia/giaUtil.c +++ b/src/aig/gia/giaUtil.c @@ -2050,6 +2050,25 @@ void Gia_AigerWriteLut( Gia_Man_t * p, char * pFileName ) Vec_WrdFree( vTruths ); } +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Gia_ManDetectMuxes( Gia_Man_t * p ) +{ + Gia_Obj_t * pObj, * pNodeT, * pNodeE; int i; + Gia_ManForEachObj( p, pObj, i ); + if ( Gia_ObjIsAnd(pObj) && Gia_ObjRecognizeMux(pObj, &pNodeT, &pNodeE) ) + pObj->fMark0 = 1; +} + //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// diff --git a/src/base/wlc/wlcSim.c b/src/base/wlc/wlcSim.c index 20ac8c61..e2fcd1f8 100644 --- a/src/base/wlc/wlcSim.c +++ b/src/base/wlc/wlcSim.c @@ -43,13 +43,13 @@ ABC_NAMESPACE_IMPL_START ***********************************************************************/ static inline word * Wlc_ObjSim( Gia_Man_t * p, int iObj ) { - return Vec_WrdEntryP( p->vSims, p->iPatsPi * iObj ); + return Vec_WrdEntryP( p->vSims, p->nSimWords * iObj ); } static inline void Wlc_ObjSimPi( Gia_Man_t * p, int iObj ) { int w; word * pSim = Wlc_ObjSim( p, iObj ); - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSim[w] = Gia_ManRandomW( 0 ); } static inline void Wlc_ObjSimRo( Gia_Man_t * p, int iObj ) @@ -57,7 +57,7 @@ static inline void Wlc_ObjSimRo( Gia_Man_t * p, int iObj ) int w; word * pSimRo = Wlc_ObjSim( p, iObj ); word * pSimRi = Wlc_ObjSim( p, Gia_ObjRoToRiId(p, iObj) ); - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSimRo[w] = pSimRi[w]; } static inline void Wlc_ObjSimCo( Gia_Man_t * p, int iObj ) @@ -67,10 +67,10 @@ static inline void Wlc_ObjSimCo( Gia_Man_t * p, int iObj ) word * pSimCo = Wlc_ObjSim( p, iObj ); word * pSimDri = Wlc_ObjSim( p, Gia_ObjFaninId0(pObj, iObj) ); if ( Gia_ObjFaninC0(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSimCo[w] = ~pSimDri[w]; else - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSimCo[w] = pSimDri[w]; } static inline void Wlc_ObjSimAnd( Gia_Man_t * p, int iObj ) @@ -81,16 +81,16 @@ static inline void Wlc_ObjSimAnd( Gia_Man_t * p, int iObj ) word * pSim0 = Wlc_ObjSim( p, Gia_ObjFaninId0(pObj, iObj) ); word * pSim1 = Wlc_ObjSim( p, Gia_ObjFaninId1(pObj, iObj) ); if ( Gia_ObjFaninC0(pObj) && Gia_ObjFaninC1(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSim[w] = ~pSim0[w] & ~pSim1[w]; else if ( Gia_ObjFaninC0(pObj) && !Gia_ObjFaninC1(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSim[w] = ~pSim0[w] & pSim1[w]; else if ( !Gia_ObjFaninC0(pObj) && Gia_ObjFaninC1(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSim[w] = pSim0[w] & ~pSim1[w]; else - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSim[w] = pSim0[w] & pSim1[w]; } @@ -135,7 +135,7 @@ Vec_Ptr_t * Wlc_NtkSimulate( Wlc_Ntk_t * p, Vec_Int_t * vNodes, int nWords, int // allocate simulation info for one timeframe Vec_WrdFreeP( &pGia->vSims ); pGia->vSims = Vec_WrdStart( Gia_ManObjNum(pGia) * nWords ); - pGia->iPatsPi = nWords; + pGia->nSimWords = nWords; // allocate resulting simulation info vRes = Vec_PtrAlloc( Vec_IntSize(vNodes) ); Wlc_NtkForEachObjVec( vNodes, p, pWlcObj, i ) @@ -188,7 +188,7 @@ Vec_Ptr_t * Wlc_NtkSimulate( Wlc_Ntk_t * p, Vec_Int_t * vNodes, int nWords, int printf( "Replaced %d dangling internal bits with constant 0.\n", Counter ); } Vec_WrdFreeP( &pGia->vSims ); - pGia->iPatsPi = 0; + pGia->nSimWords = 0; Gia_ManStop( pGia ); return vRes; } diff --git a/src/misc/util/utilTruth.h b/src/misc/util/utilTruth.h index d77ed64d..e04ffbc9 100644 --- a/src/misc/util/utilTruth.h +++ b/src/misc/util/utilTruth.h @@ -1631,6 +1631,14 @@ static inline int Abc_TtFindFirstBit( word * pIn, int nVars ) return 64*w + Abc_Tt6FirstBit(pIn[w]); return -1; } +static inline int Abc_TtFindFirstBit2( word * pIn, int nWords ) +{ + int w; + for ( w = 0; w < nWords; w++ ) + if ( pIn[w] ) + return 64*w + Abc_Tt6FirstBit(pIn[w]); + return -1; +} static inline int Abc_TtFindFirstDiffBit( word * pIn1, word * pIn2, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); @@ -1639,6 +1647,14 @@ static inline int Abc_TtFindFirstDiffBit( word * pIn1, word * pIn2, int nVars ) return 64*w + Abc_Tt6FirstBit(pIn1[w] ^ pIn2[w]); return -1; } +static inline int Abc_TtFindFirstDiffBit2( word * pIn1, word * pIn2, int nWords ) +{ + int w; + for ( w = 0; w < nWords; w++ ) + if ( pIn1[w] ^ pIn2[w] ) + return 64*w + Abc_Tt6FirstBit(pIn1[w] ^ pIn2[w]); + return -1; +} static inline int Abc_TtFindFirstZero( word * pIn, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); diff --git a/src/proof/cec/cecSat.c b/src/proof/cec/cecSat.c new file mode 100644 index 00000000..9e85e49d --- /dev/null +++ b/src/proof/cec/cecSat.c @@ -0,0 +1,862 @@ +/**CFile**************************************************************** + + FileName [cecSat.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Combinational equivalence checking.] + + Synopsis [Detection of structural isomorphism.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: cecSat.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "aig/gia/gia.h" +#include "misc/util/utilTruth.h" +#include "sat/satoko/satoko.h" +#include "sat/satoko/solver.h" + +ABC_NAMESPACE_IMPL_START + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +// sweeping manager +typedef struct Cec2_Par_t_ Cec2_Par_t; +struct Cec2_Par_t_ +{ + int nSimWords; // simulation words + int nSimRounds; // simulation rounds + int nConfLimit; // SAT solver conflict limit + int fIsMiter; // this is a miter + int fVeryVerbose; // verbose stats + int fVerbose; // verbose stats +}; + +// SAT solving manager +typedef struct Cec2_Man_t_ Cec2_Man_t; +struct Cec2_Man_t_ +{ + Cec2_Par_t * pPars; // parameters + Gia_Man_t * pAig; // user's AIG + Gia_Man_t * pNew; // internal AIG + // SAT solving + satoko_t * pSat; // SAT solver + Vec_Ptr_t * vFrontier; // CNF construction + Vec_Ptr_t * vFanins; // CNF construction + Vec_Wrd_t * vSims; // CI simulation info + Vec_Int_t * vNodesNew; // nodes + Vec_Int_t * vObjSatPairs; // nodes +}; + +static inline int Cec2_ObjSatId( Gia_Man_t * p, Gia_Obj_t * pObj ) { return Gia_ObjCopyArray(p, Gia_ObjId(p, pObj)); } +static inline int Cec2_ObjSetSatId( Gia_Man_t * p, Gia_Obj_t * pObj, int Num ) { assert(Cec2_ObjSatId(p, pObj) == -1); Gia_ObjSetCopyArray(p, Gia_ObjId(p, pObj), Num); return Num; } +static inline void Cec2_ObjCleanSatId( Gia_Man_t * p, Gia_Obj_t * pObj ) { assert(Cec2_ObjSatId(p, pObj) != -1); Gia_ObjSetCopyArray(p, Gia_ObjId(p, pObj), -1); } + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Sets parameter defaults.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec2_SetDefaultParams( Cec2_Par_t * p ) +{ + memset( p, 0, sizeof(Cec2_Par_t) ); + p->nSimWords = 8; // simulation words + p->nSimRounds = 4; // simulation rounds + p->nConfLimit = 1000; // conflict limit at a node + p->fIsMiter = 0; // this is a miter + p->fVeryVerbose = 0; // verbose stats + p->fVerbose = 1; // verbose stats +} + +/**Function************************************************************* + + Synopsis [Adds clauses to the solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec2_AddClausesMux( Gia_Man_t * p, Gia_Obj_t * pNode, satoko_t * pSat ) +{ + int fPolarFlip = 0; + Gia_Obj_t * pNodeI, * pNodeT, * pNodeE; + int pLits[4], RetValue, VarF, VarI, VarT, VarE, fCompT, fCompE; + + assert( !Gia_IsComplement( pNode ) ); + assert( pNode->fMark0 ); + // get nodes (I = if, T = then, E = else) + pNodeI = Gia_ObjRecognizeMux( pNode, &pNodeT, &pNodeE ); + // get the variable numbers + VarF = Cec2_ObjSatId(p, pNode); + VarI = Cec2_ObjSatId(p, pNodeI); + VarT = Cec2_ObjSatId(p, Gia_Regular(pNodeT)); + VarE = Cec2_ObjSatId(p, Gia_Regular(pNodeE)); + // get the complementation flags + fCompT = Gia_IsComplement(pNodeT); + fCompE = Gia_IsComplement(pNodeE); + + // f = ITE(i, t, e) + + // i' + t' + f + // i' + t + f' + // i + e' + f + // i + e + f' + + // create four clauses + pLits[0] = Abc_Var2Lit(VarI, 1); + pLits[1] = Abc_Var2Lit(VarT, 1^fCompT); + pLits[2] = Abc_Var2Lit(VarF, 0); + if ( fPolarFlip ) + { + if ( pNodeI->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeT)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); + pLits[0] = Abc_Var2Lit(VarI, 1); + pLits[1] = Abc_Var2Lit(VarT, 0^fCompT); + pLits[2] = Abc_Var2Lit(VarF, 1); + if ( fPolarFlip ) + { + if ( pNodeI->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeT)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); + pLits[0] = Abc_Var2Lit(VarI, 0); + pLits[1] = Abc_Var2Lit(VarE, 1^fCompE); + pLits[2] = Abc_Var2Lit(VarF, 0); + if ( fPolarFlip ) + { + if ( pNodeI->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); + pLits[0] = Abc_Var2Lit(VarI, 0); + pLits[1] = Abc_Var2Lit(VarE, 0^fCompE); + pLits[2] = Abc_Var2Lit(VarF, 1); + if ( fPolarFlip ) + { + if ( pNodeI->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); + + // two additional clauses + // t' & e' -> f' + // t & e -> f + + // t + e + f' + // t' + e' + f + + if ( VarT == VarE ) + { +// assert( fCompT == !fCompE ); + return; + } + + pLits[0] = Abc_Var2Lit(VarT, 0^fCompT); + pLits[1] = Abc_Var2Lit(VarE, 0^fCompE); + pLits[2] = Abc_Var2Lit(VarF, 1); + if ( fPolarFlip ) + { + if ( Gia_Regular(pNodeT)->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); + pLits[0] = Abc_Var2Lit(VarT, 1^fCompT); + pLits[1] = Abc_Var2Lit(VarE, 1^fCompE); + pLits[2] = Abc_Var2Lit(VarF, 0); + if ( fPolarFlip ) + { + if ( Gia_Regular(pNodeT)->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + if ( pNode->fPhase ) pLits[2] = Abc_LitNot( pLits[2] ); + } + RetValue = satoko_add_clause( pSat, pLits, 3 ); + assert( RetValue ); +} +void Cec2_AddClausesSuper( Gia_Man_t * p, Gia_Obj_t * pNode, Vec_Ptr_t * vSuper, satoko_t * pSat ) +{ + int fPolarFlip = 0; + Gia_Obj_t * pFanin; + int * pLits, nLits, RetValue, i; + assert( !Gia_IsComplement(pNode) ); + assert( Gia_ObjIsAnd( pNode ) ); + // create storage for literals + nLits = Vec_PtrSize(vSuper) + 1; + pLits = ABC_ALLOC( int, nLits ); + // suppose AND-gate is A & B = C + // add !A => !C or A + !C + Vec_PtrForEachEntry( Gia_Obj_t *, vSuper, pFanin, i ) + { + pLits[0] = Abc_Var2Lit(Cec2_ObjSatId(p, Gia_Regular(pFanin)), Gia_IsComplement(pFanin)); + pLits[1] = Abc_Var2Lit(Cec2_ObjSatId(p, pNode), 1); + if ( fPolarFlip ) + { + if ( Gia_Regular(pFanin)->fPhase ) pLits[0] = Abc_LitNot( pLits[0] ); + if ( pNode->fPhase ) pLits[1] = Abc_LitNot( pLits[1] ); + } + RetValue = satoko_add_clause( pSat, pLits, 2 ); + assert( RetValue ); + } + // add A & B => C or !A + !B + C + Vec_PtrForEachEntry( Gia_Obj_t *, vSuper, pFanin, i ) + { + pLits[i] = Abc_Var2Lit(Cec2_ObjSatId(p, Gia_Regular(pFanin)), !Gia_IsComplement(pFanin)); + if ( fPolarFlip ) + { + if ( Gia_Regular(pFanin)->fPhase ) pLits[i] = Abc_LitNot( pLits[i] ); + } + } + pLits[nLits-1] = Abc_Var2Lit(Cec2_ObjSatId(p, pNode), 0); + if ( fPolarFlip ) + { + if ( pNode->fPhase ) pLits[nLits-1] = Abc_LitNot( pLits[nLits-1] ); + } + RetValue = satoko_add_clause( pSat, pLits, nLits ); + assert( RetValue ); + ABC_FREE( pLits ); +} + +/**Function************************************************************* + + Synopsis [Adds clauses and returns CNF variable of the node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec2_CollectSuper_rec( Gia_Obj_t * pObj, Vec_Ptr_t * vSuper, int fFirst, int fUseMuxes ) +{ + // if the new node is complemented or a PI, another gate begins + if ( Gia_IsComplement(pObj) || Gia_ObjIsCi(pObj) || + (!fFirst && Gia_ObjValue(pObj) > 1) || + (fUseMuxes && pObj->fMark0) ) + { + Vec_PtrPushUnique( vSuper, pObj ); + return; + } + // go through the branches + Cec2_CollectSuper_rec( Gia_ObjChild0(pObj), vSuper, 0, fUseMuxes ); + Cec2_CollectSuper_rec( Gia_ObjChild1(pObj), vSuper, 0, fUseMuxes ); +} +void Cec2_CollectSuper( Gia_Obj_t * pObj, int fUseMuxes, Vec_Ptr_t * vSuper ) +{ + assert( !Gia_IsComplement(pObj) ); + assert( !Gia_ObjIsCi(pObj) ); + Vec_PtrClear( vSuper ); + Cec2_CollectSuper_rec( pObj, vSuper, 1, fUseMuxes ); +} +void Cec2_ObjAddToFrontier( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Ptr_t * vFrontier, satoko_t * pSat ) +{ + assert( !Gia_IsComplement(pObj) ); + assert( !Gia_ObjIsConst0(pObj) ); + if ( Cec2_ObjSatId(p, pObj) >= 0 ) + return; + assert( Cec2_ObjSatId(p, pObj) == -1 ); + Cec2_ObjSetSatId( p, pObj, satoko_add_variable(pSat, 0) ); + if ( Gia_ObjIsAnd(pObj) ) + Vec_PtrPush( vFrontier, pObj ); +} +int Cec2_ObjGetCnfVar( Cec2_Man_t * p, int iObj ) +{ + Gia_Obj_t * pNode, * pFanin; + Gia_Obj_t * pObj = Gia_ManObj(p->pNew, iObj); + int i, k, fUseMuxes = 1; + // quit if CNF is ready + if ( Cec2_ObjSatId(p->pNew,pObj) >= 0 ) + return Cec2_ObjSatId(p->pNew,pObj); + assert( iObj > 0 ); + if ( Gia_ObjIsCi(pObj) ) + return Cec2_ObjSetSatId( p->pNew, pObj, satoko_add_variable(p->pSat, 0) ); + assert( Gia_ObjIsAnd(pObj) ); + // start the frontier + Vec_PtrClear( p->vFrontier ); + Cec2_ObjAddToFrontier( p->pNew, pObj, p->vFrontier, p->pSat ); + // explore nodes in the frontier + Vec_PtrForEachEntry( Gia_Obj_t *, p->vFrontier, pNode, i ) + { + // create the supergate + assert( Cec2_ObjSatId(p->pNew,pNode) >= 0 ); + if ( fUseMuxes && pNode->fMark0 ) + { + Vec_PtrClear( p->vFanins ); + Vec_PtrPushUnique( p->vFanins, Gia_ObjFanin0( Gia_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( p->vFanins, Gia_ObjFanin0( Gia_ObjFanin1(pNode) ) ); + Vec_PtrPushUnique( p->vFanins, Gia_ObjFanin1( Gia_ObjFanin0(pNode) ) ); + Vec_PtrPushUnique( p->vFanins, Gia_ObjFanin1( Gia_ObjFanin1(pNode) ) ); + Vec_PtrForEachEntry( Gia_Obj_t *, p->vFanins, pFanin, k ) + Cec2_ObjAddToFrontier( p->pNew, Gia_Regular(pFanin), p->vFrontier, p->pSat ); + Cec2_AddClausesMux( p->pNew, pNode, p->pSat ); + } + else + { + Cec2_CollectSuper( pNode, fUseMuxes, p->vFanins ); + Vec_PtrForEachEntry( Gia_Obj_t *, p->vFanins, pFanin, k ) + Cec2_ObjAddToFrontier( p->pNew, Gia_Regular(pFanin), p->vFrontier, p->pSat ); + Cec2_AddClausesSuper( p->pNew, pNode, p->vFanins, p->pSat ); + } + assert( Vec_PtrSize(p->vFanins) > 1 ); + } + return Cec2_ObjSatId(p->pNew,pObj); +} + + + +/**Function************************************************************* + + Synopsis [Internal simulation APIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline word * Cec2_ObjSim( Gia_Man_t * p, int iObj ) +{ + return Vec_WrdEntryP( p->vSims, p->nSimWords * iObj ); +} +static inline void Cec2_ObjSimSetPiBit( Gia_Man_t * p, int iObj, int Bit ) +{ + word * pSim = Cec2_ObjSim( p, iObj ); + p->iPatsPi = (p->iPatsPi == 64 * p->nSimWords - 1) ? 1 : p->iPatsPi + 1; + assert( p->iPatsPi > 0 && p->iPatsPi < 64 * p->nSimWords ); + if ( Abc_InfoHasBit( (unsigned*)pSim, p->iPatsPi ) != Bit ) + Abc_InfoXorBit( (unsigned*)pSim, p->iPatsPi ); +} +static inline void Cec2_ObjSimRo( Gia_Man_t * p, int iObj ) +{ + int w; + word * pSimRo = Cec2_ObjSim( p, iObj ); + word * pSimRi = Cec2_ObjSim( p, Gia_ObjRoToRiId(p, iObj) ); + for ( w = 0; w < p->nSimWords; w++ ) + pSimRo[w] = pSimRi[w]; +} +static inline void Cec2_ObjSimCo( Gia_Man_t * p, int iObj ) +{ + int w; + Gia_Obj_t * pObj = Gia_ManObj( p, iObj ); + word * pSimCo = Cec2_ObjSim( p, iObj ); + word * pSimDri = Cec2_ObjSim( p, Gia_ObjFaninId0(pObj, iObj) ); + if ( Gia_ObjFaninC0(pObj) ) + for ( w = 0; w < p->nSimWords; w++ ) + pSimCo[w] = ~pSimDri[w]; + else + for ( w = 0; w < p->nSimWords; w++ ) + pSimCo[w] = pSimDri[w]; +} +static inline void Cec2_ObjSimAnd( Gia_Man_t * p, int iObj ) +{ + int w; + Gia_Obj_t * pObj = Gia_ManObj( p, iObj ); + word * pSim = Cec2_ObjSim( p, iObj ); + word * pSim0 = Cec2_ObjSim( p, Gia_ObjFaninId0(pObj, iObj) ); + word * pSim1 = Cec2_ObjSim( p, Gia_ObjFaninId1(pObj, iObj) ); + if ( Gia_ObjFaninC0(pObj) && Gia_ObjFaninC1(pObj) ) + for ( w = 0; w < p->nSimWords; w++ ) + pSim[w] = ~pSim0[w] & ~pSim1[w]; + else if ( Gia_ObjFaninC0(pObj) && !Gia_ObjFaninC1(pObj) ) + for ( w = 0; w < p->nSimWords; w++ ) + pSim[w] = ~pSim0[w] & pSim1[w]; + else if ( !Gia_ObjFaninC0(pObj) && Gia_ObjFaninC1(pObj) ) + for ( w = 0; w < p->nSimWords; w++ ) + pSim[w] = pSim0[w] & ~pSim1[w]; + else + for ( w = 0; w < p->nSimWords; w++ ) + pSim[w] = pSim0[w] & pSim1[w]; +} +static inline int Cec2_ObjSimEqual( Gia_Man_t * p, int iObj0, int iObj1 ) +{ + int w; + word * pSim0 = Cec2_ObjSim( p, iObj0 ); + word * pSim1 = Cec2_ObjSim( p, iObj1 ); + if ( (pSim0[0] & 1) == (pSim1[0] & 1) ) + { + for ( w = 0; w < p->nSimWords; w++ ) + if ( pSim0[w] != pSim1[w] ) + return 0; + return 1; + } + else + { + for ( w = 0; w < p->nSimWords; w++ ) + if ( pSim0[w] != ~pSim1[w] ) + return 0; + return 1; + } +} +static inline void Cec2_ObjSimPi( Gia_Man_t * p, int iObj ) +{ + int w; + word * pSim = Cec2_ObjSim( p, iObj ); + for ( w = 0; w < p->nSimWords; w++ ) + pSim[w] = Gia_ManRandomW( 0 ); + pSim[0] <<= 1; +} +void Cec2_ManSimulateCis( Gia_Man_t * p ) +{ + int i, Id; + Gia_ManForEachCiId( p, Id, i ) + Cec2_ObjSimPi( p, Id ); + p->iPatsPi = 1; +} +Abc_Cex_t * Cec2_ManDeriveCex( Gia_Man_t * p, int iOut, int iPat ) +{ + Abc_Cex_t * pCex; + int i, Id; + pCex = Abc_CexAlloc( 0, Gia_ManCiNum(p), 1 ); + pCex->iPo = iOut; + if ( iPat == -1 ) + return pCex; + Gia_ManForEachCiId( p, Id, i ) + if ( Abc_InfoHasBit((unsigned *)Cec2_ObjSim(p, Id), iPat) ) + Abc_InfoSetBit( pCex->pData, i ); + return pCex; +} +int Cec2_ManSimulateCos( Gia_Man_t * p ) +{ + int i, Id; + // check outputs and generate CEX if they fail + Gia_ManForEachCoId( p, Id, i ) + { + Cec2_ObjSimCo( p, Id ); + if ( Cec2_ObjSimEqual(p, Id, 0) ) + continue; + p->pCexSeq = Cec2_ManDeriveCex( p, i, Abc_TtFindFirstBit2(Cec2_ObjSim(p, Id), p->nSimWords) ); + return 0; + } + return 1; +} +void Cec2_ManSaveCis( Gia_Man_t * p ) +{ + int w, i, Id; + assert( p->vSimsPi != NULL ); + for ( w = 0; w < p->nSimWords; w++ ) + Gia_ManForEachCiId( p, Id, i ) + Vec_WrdPush( p->vSimsPi, Cec2_ObjSim(p, Id)[w] ); +} +void Cec2_ManSimulate( Gia_Man_t * p ) +{ + extern void Cec2_ManSimClassRefineOne( Gia_Man_t * p, int iRepr ); + Gia_Obj_t * pObj; int i; + Cec2_ManSaveCis( p ); + Gia_ManForEachAnd( p, pObj, i ) + Cec2_ObjSimAnd( p, i ); + if ( p->pReprs == NULL ) + return; + Gia_ManForEachClass0( p, i ) + Cec2_ManSimClassRefineOne( p, i ); +} +void Cec2_ManSimAlloc( Gia_Man_t * p, int nWords ) +{ + Vec_WrdFreeP( &p->vSims ); + Vec_WrdFreeP( &p->vSimsPi ); + p->vSims = Vec_WrdStart( Gia_ManObjNum(p) * nWords ); + p->vSimsPi = Vec_WrdAlloc( Gia_ManCiNum(p) * nWords * 4 ); // storage for CI patterns + p->nSimWords = nWords; +} + + +/**Function************************************************************* + + Synopsis [Computes hash key of the simulation info.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cec2_ManSimHashKey( word * pSim, int nSims, int nTableSize ) +{ + static int s_Primes[16] = { + 1291, 1699, 1999, 2357, 2953, 3313, 3907, 4177, + 4831, 5147, 5647, 6343, 6899, 7103, 7873, 8147 }; + unsigned uHash = 0, * pSimU = (unsigned *)pSim; + int i, nSimsU = 2 * nSims; + if ( pSimU[0] & 1 ) + for ( i = 0; i < nSimsU; i++ ) + uHash ^= ~pSimU[i] * s_Primes[i & 0xf]; + else + for ( i = 0; i < nSimsU; i++ ) + uHash ^= pSimU[i] * s_Primes[i & 0xf]; + return (int)(uHash % nTableSize); + +} + +/**Function************************************************************* + + Synopsis [Creating initial equivalence classes.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec2_ManSimClassRefineOne( Gia_Man_t * p, int iRepr ) +{ + int iObj, iPrev = iRepr, iPrev2, iRepr2; + Gia_ClassForEachObj1( p, iRepr, iRepr2 ) + if ( Cec2_ObjSimEqual(p, iRepr, iRepr2) ) + iPrev = iRepr2; + else + break; + if ( iRepr2 <= 0 ) // no refinement + return; + // relink remaining nodes of the class + // nodes that are equal to iRepr, remain in the class of iRepr + // nodes that are not equal to iRepr, move to the class of iRepr2 + Gia_ObjSetRepr( p, iRepr2, GIA_VOID ); + iPrev2 = iRepr2; + for ( iObj = Gia_ObjNext(p, iRepr2); iObj > 0; iObj = Gia_ObjNext(p, iObj) ) + { + if ( Cec2_ObjSimEqual(p, iRepr, iObj) ) // remains with iRepr + { + Gia_ObjSetNext( p, iPrev, iObj ); + iPrev = iObj; + } + else // moves to iRepr2 + { + Gia_ObjSetRepr( p, iObj, iRepr2 ); + Gia_ObjSetNext( p, iPrev2, iObj ); + iPrev2 = iObj; + } + } + Gia_ObjSetNext( p, iPrev, -1 ); + Gia_ObjSetNext( p, iPrev2, -1 ); +} +void Cec2_ManCreateClasses( Gia_Man_t * p ) +{ + Gia_Obj_t * pObj; + int nWords = p->nSimWords; + int * pTable, nTableSize, i, Key; + // allocate representation + assert( p->pReprs == NULL ); + p->pReprs = ABC_CALLOC( Gia_Rpr_t, Gia_ManObjNum(p) ); + p->pNexts = ABC_FALLOC( int, Gia_ManObjNum(p) ); + // hash each node by its simulation info + nTableSize = Abc_PrimeCudd( Gia_ManObjNum(p) ); + pTable = ABC_FALLOC( int, nTableSize ); + Gia_ManForEachObj( p, pObj, i ) + { + p->pReprs[i].iRepr = GIA_VOID; + if ( Gia_ObjIsCo(pObj) ) + continue; + Key = Cec2_ManSimHashKey( Cec2_ObjSim(p, i), nWords, nTableSize ); + assert( Key >= 0 && Key < nTableSize ); + if ( pTable[Key] == -1 ) + pTable[Key] = i; + else + Gia_ObjSetRepr( p, i, pTable[Key] ); + } + // create classes + for ( i = Gia_ManObjNum(p) - 1; i >= 0; i-- ) + { + int iRepr = Gia_ObjRepr(p, i); + if ( iRepr == GIA_VOID ) + continue; + Gia_ObjSetNext( p, i, Gia_ObjNext(p, iRepr) ); + Gia_ObjSetNext( p, iRepr, i ); + } + ABC_FREE( pTable ); + Gia_ManForEachClass0( p, i ) + Cec2_ManSimClassRefineOne( p, i ); +} + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cec2_Man_t * Cec2_ManCreate( Gia_Man_t * pAig, Cec2_Par_t * pPars ) +{ + Cec2_Man_t * p; + Gia_Obj_t * pObj; int i; + assert( Gia_ManRegNum(pAig) == 0 ); + p = ABC_CALLOC( Cec2_Man_t, 1 ); + memset( p, 0, sizeof(Cec2_Man_t) ); + p->pPars = pPars; + p->pAig = pAig; + // create new manager + p->pNew = Gia_ManStart( Gia_ManObjNum(pAig) ); + Gia_ManFillValue( pAig ); + Gia_ManConst0(pAig)->Value = 0; + Gia_ManForEachCi( pAig, pObj, i ) + pObj->Value = Gia_ManAppendCi( p->pNew ); + Gia_ManHashAlloc( p->pNew ); + Vec_IntFill( &p->pNew->vCopies, Gia_ManObjNum(p->pNew), -1 ); + // SAT solving + p->pSat = satoko_create(); + p->vFrontier = Vec_PtrAlloc( 1000 ); + p->vFanins = Vec_PtrAlloc( 100 ); + p->vNodesNew = Vec_IntAlloc( 100 ); + p->vObjSatPairs = Vec_IntAlloc( 100 ); + // remember pointer to the solver in the AIG manager + pAig->pData = p->pSat; + return p; +} +void Cec2_ManDestroy( Cec2_Man_t * p ) +{ + Vec_WrdFreeP( &p->pAig->vSims ); + //Vec_WrdFreeP( &p->pAig->vSimsPi ); + Gia_ManCleanMark01( p->pAig ); + satoko_destroy( p->pSat ); + Gia_ManStopP( &p->pNew ); + Vec_PtrFreeP( &p->vFrontier ); + Vec_PtrFreeP( &p->vFanins ); + Vec_IntFreeP( &p->vNodesNew ); + Vec_IntFreeP( &p->vObjSatPairs ); + ABC_FREE( p ); +} + + +/**Function************************************************************* + + Synopsis [Internal simulation APIs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cec2_ManCollect_rec( Cec2_Man_t * p, int iObj ) +{ + Gia_Obj_t * pObj; + if ( Gia_ObjIsTravIdCurrentId(p->pNew, iObj) ) + return; + Gia_ObjSetTravIdCurrentId(p->pNew, iObj); + pObj = Gia_ManObj( p->pNew, iObj ); + if ( Cec2_ObjSatId(p->pNew, pObj) >= 0 ) + Vec_IntPush( p->vNodesNew, iObj ); + if ( !iObj ) + return; + if ( Gia_ObjIsAnd(pObj) ) + { + Cec2_ManCollect_rec( p, Gia_ObjFaninId0(pObj, iObj) ); + Cec2_ManCollect_rec( p, Gia_ObjFaninId1(pObj, iObj) ); + } + else + { + assert( Cec2_ObjSatId(p->pNew, pObj) >= 0 ); + Vec_IntPushTwo( p->vObjSatPairs, Gia_ManCiIdToId(p->pAig, Gia_ObjCioId(pObj)), Cec2_ObjSatId(p->pNew, pObj) ); // SAT var + } +} +int Cec2_ManSolveTwo( Cec2_Man_t * p, int iObj0, int iObj1, int fPhase ) +{ + Gia_Obj_t * pObj; + int status, i, iVar0, iVar1; + if (iObj1 < iObj0) + iObj1 ^= iObj0, iObj0 ^= iObj1, iObj1 ^= iObj0; + assert( iObj0 < iObj1 ); + assert( solver_varnum(p->pSat) == 0 ); + if ( !iObj0 ) + Cec2_ObjSetSatId( p->pNew, Gia_ManConst0(p->pNew), satoko_add_variable(p->pSat, 0) ); + iVar0 = Cec2_ObjGetCnfVar( p, iObj0 ); + iVar1 = Cec2_ObjGetCnfVar( p, iObj1 ); + // collect inputs and internal nodes + Vec_IntClear( p->vNodesNew ); + Vec_IntClear( p->vObjSatPairs ); + Gia_ManIncrementTravId( p->pNew ); + Cec2_ManCollect_rec( p, iObj0 ); + Cec2_ManCollect_rec( p, iObj1 ); + // solve direct + satoko_assump_push( p->pSat, Abc_Var2Lit(iVar0, 1) ); + satoko_assump_push( p->pSat, Abc_Var2Lit(iVar1, fPhase) ); + status = satoko_solve( p->pSat ); + satoko_assump_pop( p->pSat ); + satoko_assump_pop( p->pSat ); + if ( status == SATOKO_UNSAT && iObj0 > 0 ) + { + // solve reverse + satoko_assump_push( p->pSat, Abc_Var2Lit(iVar0, 0) ); + satoko_assump_push( p->pSat, Abc_Var2Lit(iVar1, !fPhase) ); + status = satoko_solve( p->pSat ); + satoko_assump_pop( p->pSat ); + satoko_assump_pop( p->pSat ); + } + Gia_ManForEachObjVec( p->vNodesNew, p->pNew, pObj, i ) + Cec2_ObjCleanSatId( p->pNew, pObj ); + return status; +} +int Cec2_ManSweepNode( Cec2_Man_t * p, int iObj ) +{ + int i, IdAig, IdSat, status, RetValue = 1; + Gia_Obj_t * pObj = Gia_ManObj( p->pAig, iObj ); + Gia_Obj_t * pRepr = Gia_ObjReprObj( p->pAig, iObj ); + int fCompl = Abc_LitIsCompl(pObj->Value) ^ Abc_LitIsCompl(pRepr->Value) ^ pObj->fPhase ^ pRepr->fPhase; + status = Cec2_ManSolveTwo( p, Abc_Lit2Var(pRepr->Value), Abc_Lit2Var(pObj->Value), fCompl ); + if ( status == SATOKO_SAT ) + { + Vec_IntForEachEntryDouble( p->vObjSatPairs, IdAig, IdSat, i ) + Cec2_ObjSimSetPiBit( p->pAig, IdAig, var_value(p->pSat, IdSat) == LIT_TRUE ); + RetValue = 0; + } + else if ( status == SATOKO_UNSAT ) + { + pObj->Value = Abc_LitNotCond( pRepr->Value, fCompl ); + Gia_ObjSetProved( p->pAig, iObj ); + } + else + { + assert( status == SATOKO_UNDEC ); + Gia_ObjSetFailed( p->pAig, iObj ); + assert( 0 ); + } + satoko_rollback( p->pSat ); + return RetValue; +} +int Cec2_ManPerformSweeping( Gia_Man_t * p, Cec2_Par_t * pPars ) +{ + Cec2_Man_t * pMan; + Gia_Obj_t * pObj, * pRepr, * pObjNew; + int i, fDisproved = 1; + + // check if any output trivially fails under all-0 pattern + Gia_ManSetPhase( p ); + if ( pPars->fIsMiter ) + { + Gia_ManForEachCo( p, pObj, i ) + if ( pObj->fPhase ) + { + p->pCexSeq = Cec2_ManDeriveCex( p, i, -1 ); + return 0; + } + } + // simulate one round and create classes + Cec2_ManSimAlloc( p, pPars->nSimWords ); + Cec2_ManSimulateCis( p ); + Cec2_ManSimulate( p ); + if ( pPars->fIsMiter && !Cec2_ManSimulateCos(p) ) // cex detected + return 0; + Cec2_ManCreateClasses( p ); + if ( pPars->fVerbose ) + Gia_ManEquivPrintClasses( p, pPars->fVeryVerbose, 0 ); + + // perform additinal simulation + for ( i = 0; i < pPars->nSimRounds; i++ ) + { + Cec2_ManSimulateCis( p ); + Cec2_ManSimulate( p ); + if ( pPars->fIsMiter && !Cec2_ManSimulateCos(p) ) // cex detected + return 0; + if ( pPars->fVerbose ) + Gia_ManEquivPrintClasses( p, pPars->fVeryVerbose, 0 ); + } + // perform sweeping + pMan = Cec2_ManCreate( p, pPars ); + while ( fDisproved ) + { + fDisproved = 0; + Cec2_ManSimulateCis( p ); + Gia_ManForEachAnd( p, pObj, i ) + { + pObj->fMark1 = 0; + if ( ~pObj->Value ) // skip swept nodes + continue; + assert( !Gia_ObjProved(p, i) && !Gia_ObjFailed(p, i) ); + pObj->fMark1 = Gia_ObjFanin0(pObj)->fMark1 || Gia_ObjFanin1(pObj)->fMark1; + if ( pObj->fMark1 ) // skip nodes in the TFO of a disproved one + continue; + // duplicate the node + pObj->Value = Gia_ManHashAnd( pMan->pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) ); + if ( Vec_IntSize(&pMan->pNew->vCopies) == Abc_Lit2Var(pObj->Value) ) + { + pObjNew = Gia_ManObj( pMan->pNew, Abc_Lit2Var(pObj->Value) ); + pObjNew->fMark0 = Gia_ObjIsMuxType( pObjNew ); + Vec_IntPush( &pMan->pNew->vCopies, -1 ); + } + assert( Vec_IntSize(&pMan->pNew->vCopies) == Gia_ManObjNum(pMan->pNew) ); + pRepr = Gia_ObjReprObj( p, i ); + if ( pRepr == NULL || pRepr->fMark1 ) + continue; + //if ( Gia_ObjIsConst0(pRepr) ) + // continue; + if ( Abc_Lit2Var(pObj->Value) == Abc_Lit2Var(pRepr->Value) ) + { + assert( (pObj->Value ^ pRepr->Value) == (pObj->fPhase ^ pRepr->fPhase) ); + Gia_ObjSetProved( p, i ); + continue; + } + if ( Cec2_ManSweepNode(pMan, i) ) + continue; + // mark nodes as disproved + pRepr->fMark1 = pObj->fMark1 = 1; + fDisproved = 1; + } + if ( fDisproved ) + { + Cec2_ManSimulate( p ); + if ( pPars->fIsMiter && !Cec2_ManSimulateCos(p) ) // cex detected + break; + } + if ( pPars->fVerbose ) + Gia_ManEquivPrintClasses( p, pPars->fVeryVerbose, 0 ); + } + Cec2_ManDestroy( pMan ); + return p->pCexSeq ? 0 : 1; +} +void Cec2_ManSimulateTest( Gia_Man_t * p ) +{ + abctime clk = Abc_Clock(); + Cec2_Par_t Pars, * pPars = &Pars; + Cec2_SetDefaultParams( pPars ); + Cec2_ManPerformSweeping( p, pPars ); + Abc_PrintTime( 1, "SAT sweeping time", Abc_Clock() - clk ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + +ABC_NAMESPACE_IMPL_END + diff --git a/src/proof/cec/module.make b/src/proof/cec/module.make index 82e0de74..38106e5e 100644 --- a/src/proof/cec/module.make +++ b/src/proof/cec/module.make @@ -6,6 +6,7 @@ SRC += src/proof/cec/cecCec.c \ src/proof/cec/cecIso.c \ src/proof/cec/cecMan.c \ src/proof/cec/cecPat.c \ + src/proof/cec/cecSat.c \ src/proof/cec/cecSeq.c \ src/proof/cec/cecSolve.c \ src/proof/cec/cecSplit.c \ diff --git a/src/sat/bmc/bmcGen.c b/src/sat/bmc/bmcGen.c index 5d84ce87..460c9fec 100644 --- a/src/sat/bmc/bmcGen.c +++ b/src/sat/bmc/bmcGen.c @@ -46,13 +46,13 @@ ABC_NAMESPACE_IMPL_START ***********************************************************************/ static inline word * Gia_ManMoObj( Gia_Man_t * p, int iObj ) { - return Vec_WrdEntryP( p->vSims, iObj * p->iPatsPi ); + return Vec_WrdEntryP( p->vSims, iObj * p->nSimWords ); } static inline void Gia_ManMoSetCi( Gia_Man_t * p, int iObj ) { int w; word * pSims = Gia_ManMoObj( p, iObj ); - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = Gia_ManRandomW( 0 ); } static inline void Gia_ManMoSimAnd( Gia_Man_t * p, int iObj ) @@ -65,19 +65,19 @@ static inline void Gia_ManMoSimAnd( Gia_Man_t * p, int iObj ) if ( Gia_ObjFaninC0(pObj) ) { if ( Gia_ObjFaninC1(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = ~(pSims0[w] | pSims1[w]); else - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = ~pSims0[w] & pSims1[w]; } else { if ( Gia_ObjFaninC1(pObj) ) - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = pSims0[w] & ~pSims1[w]; else - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = pSims0[w] & pSims1[w]; } } @@ -89,12 +89,12 @@ static inline void Gia_ManMoSetCo( Gia_Man_t * p, int iObj ) word * pSims0 = Gia_ManMoObj( p, Gia_ObjFaninId0(pObj, iObj) ); if ( Gia_ObjFaninC0(pObj) ) { - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = ~pSims0[w]; } else { - for ( w = 0; w < p->iPatsPi; w++ ) + for ( w = 0; w < p->nSimWords; w++ ) pSims[w] = pSims0[w]; } } @@ -102,7 +102,7 @@ void Gia_ManMoFindSimulate( Gia_Man_t * p, int nWords ) { int i, iObj; Gia_ManRandomW( 1 ); - p->iPatsPi = nWords; + p->nSimWords = nWords; if ( p->vSims ) Vec_WrdFill( p->vSims, nWords * Gia_ManObjNum(p), 0 ); else diff --git a/src/sat/satoko/satoko.h b/src/sat/satoko/satoko.h index 88070eac..7c2f3720 100644 --- a/src/sat/satoko/satoko.h +++ b/src/sat/satoko/satoko.h @@ -83,7 +83,7 @@ extern void satoko_destroy(satoko_t *); extern void satoko_default_opts(satoko_opts_t *); extern void satoko_configure(satoko_t *, satoko_opts_t *); extern int satoko_parse_dimacs(char *, satoko_t **); -extern void satoko_add_variable(satoko_t *, char); +extern int satoko_add_variable(satoko_t *, char); extern int satoko_add_clause(satoko_t *, unsigned *, unsigned); extern void satoko_assump_push(satoko_t *s, unsigned); extern void satoko_assump_pop(satoko_t *s); diff --git a/src/sat/satoko/solver_api.c b/src/sat/satoko/solver_api.c index 9cad0a14..e03cc084 100644 --- a/src/sat/satoko/solver_api.c +++ b/src/sat/satoko/solver_api.c @@ -216,7 +216,7 @@ int satoko_simplify(solver_t * s) return SATOKO_OK; } -void satoko_add_variable(solver_t *s, char sign) +int satoko_add_variable(solver_t *s, char sign) { unsigned var = vec_act_size(s->activity); vec_wl_push(s->watches); @@ -231,6 +231,7 @@ void satoko_add_variable(solver_t *s, char sign) heap_insert(s->var_order, var); if (s->marks) vec_char_push_back(s->marks, 0); + return var; } int satoko_add_clause(solver_t *s, unsigned *lits, unsigned size) @@ -351,6 +352,7 @@ void satoko_rollback(satoko_t *s) clause_unwatch(s, cdb_cref(s->all_clauses, (unsigned *)cl_to_remove[i])); cl_to_remove[i]->f_mark = 1; } + satoko_free(cl_to_remove); vec_uint_shrink(s->originals, s->book_cl_orig); vec_uint_shrink(s->learnts, s->book_cl_lrnt); /* Shrink variable related vectors */ -- cgit v1.2.3