diff options
Diffstat (limited to 'src/aig/gia')
-rw-r--r-- | src/aig/gia/gia.h | 4 | ||||
-rw-r--r-- | src/aig/gia/giaCSat.c | 497 | ||||
-rw-r--r-- | src/aig/gia/giaCSatOld.c | 797 | ||||
-rw-r--r-- | src/aig/gia/giaRetime.c | 1 | ||||
-rw-r--r-- | src/aig/gia/giaSim.c | 2 | ||||
-rw-r--r-- | src/aig/gia/module.make | 1 |
6 files changed, 1148 insertions, 154 deletions
diff --git a/src/aig/gia/gia.h b/src/aig/gia/gia.h index 87c85516..5395f361 100644 --- a/src/aig/gia/gia.h +++ b/src/aig/gia/gia.h @@ -459,8 +459,10 @@ extern Aig_Man_t * Gia_ManToAig( Gia_Man_t * p ); extern Gia_Man_t * Gia_ReadAiger( char * pFileName, int fCheck ); extern void Gia_WriteAiger( Gia_Man_t * p, char * pFileName, int fWriteSymbols, int fCompact ); extern void Gia_DumpAiger( Gia_Man_t * p, char * pFilePrefix, int iFileNum, int nFileNumDigits ); +/*=== giaCsatOld.c ============================================================*/ +extern Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pGia, int nConfs, Vec_Str_t ** pvStatus, int fVerbose ); /*=== giaCsat.c ============================================================*/ -extern Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pGia, int nConfs, Vec_Str_t ** pvStatus ); +extern Vec_Int_t * Cbs_ManSolveMiterNc( Gia_Man_t * pGia, int nConfs, Vec_Str_t ** pvStatus, int fVerbose ); /*=== giaCof.c =============================================================*/ extern void Gia_ManPrintFanio( Gia_Man_t * pGia, int nNodes ); extern Gia_Man_t * Gia_ManDupCof( Gia_Man_t * p, int iVar ); diff --git a/src/aig/gia/giaCSat.c b/src/aig/gia/giaCSat.c index 5fa9f40f..15faea72 100644 --- a/src/aig/gia/giaCSat.c +++ b/src/aig/gia/giaCSat.c @@ -32,6 +32,7 @@ struct Cbs_Par_t_ int nJustLimit; // limit on the size of justification queue // current parameters int nBTThis; // number of conflicts + int nBTThisNc; // number of conflicts int nJustThis; // max size of the frontier int nBTTotal; // total number of conflicts int nJustTotal; // total size of the frontier @@ -48,7 +49,7 @@ struct Cbs_Que_t_ { int iHead; // beginning of the queue int iTail; // end of the queue - int nSize; // allocated size + int nSize; // allocated size Gia_Obj_t ** pData; // nodes stored in the queue }; @@ -59,7 +60,11 @@ struct Cbs_Man_t_ Gia_Man_t * pAig; // AIG manager Cbs_Que_t pProp; // propagation queue Cbs_Que_t pJust; // justification queue + Cbs_Que_t pClauses; // clause queue + Gia_Obj_t ** pIter; // iterator through clause vars + Vec_Int_t * vLevReas; // levels and decisions Vec_Int_t * vModel; // satisfying assignment + Vec_Ptr_t * vTemp; // temporary storage // SAT calls statistics int nSatUnsat; // the number of proofs int nSatSat; // the number of failure @@ -78,16 +83,26 @@ struct Cbs_Man_t_ static inline int Cbs_VarIsAssigned( Gia_Obj_t * pVar ) { return pVar->fMark0; } static inline void Cbs_VarAssign( Gia_Obj_t * pVar ) { assert(!pVar->fMark0); pVar->fMark0 = 1; } -static inline void Cbs_VarUnassign( Gia_Obj_t * pVar ) { assert(pVar->fMark0); pVar->fMark0 = 0; pVar->fMark1 = 0; } +static inline void Cbs_VarUnassign( Gia_Obj_t * pVar ) { assert(pVar->fMark0); pVar->fMark0 = 0; pVar->fMark1 = 0; pVar->Value = ~0; } static inline int Cbs_VarValue( Gia_Obj_t * pVar ) { assert(pVar->fMark0); return pVar->fMark1; } static inline void Cbs_VarSetValue( Gia_Obj_t * pVar, int v ) { assert(pVar->fMark0); pVar->fMark1 = v; } static inline int Cbs_VarIsJust( Gia_Obj_t * pVar ) { return Gia_ObjIsAnd(pVar) && !Cbs_VarIsAssigned(Gia_ObjFanin0(pVar)) && !Cbs_VarIsAssigned(Gia_ObjFanin1(pVar)); } static inline int Cbs_VarFanin0Value( Gia_Obj_t * pVar ) { return !Cbs_VarIsAssigned(Gia_ObjFanin0(pVar)) ? 2 : (Cbs_VarValue(Gia_ObjFanin0(pVar)) ^ Gia_ObjFaninC0(pVar)); } static inline int Cbs_VarFanin1Value( Gia_Obj_t * pVar ) { return !Cbs_VarIsAssigned(Gia_ObjFanin1(pVar)) ? 2 : (Cbs_VarValue(Gia_ObjFanin1(pVar)) ^ Gia_ObjFaninC1(pVar)); } -#define Cbs_QueForEachEntry( Que, pObj, i ) \ +static inline int Cbs_VarDecLevel( Cbs_Man_t * p, Gia_Obj_t * pVar ) { assert( pVar->Value != ~0 ); return Vec_IntEntry(p->vLevReas, 3*pVar->Value); } +static inline Gia_Obj_t * Cbs_VarReason0( Cbs_Man_t * p, Gia_Obj_t * pVar ) { assert( pVar->Value != ~0 ); return pVar + Vec_IntEntry(p->vLevReas, 3*pVar->Value+1); } +static inline Gia_Obj_t * Cbs_VarReason1( Cbs_Man_t * p, Gia_Obj_t * pVar ) { assert( pVar->Value != ~0 ); return pVar + Vec_IntEntry(p->vLevReas, 3*pVar->Value+2); } +static inline int Cbs_ClauseDecLevel( Cbs_Man_t * p, int hClause ) { return Cbs_VarDecLevel( p, p->pClauses.pData[hClause] ); } + +#define Cbs_QueForEachEntry( Que, pObj, i ) \ for ( i = (Que).iHead; (i < (Que).iTail) && ((pObj) = (Que).pData[i]); i++ ) +#define Cbs_ClauseForEachVar( p, hClause, pObj ) \ + for ( (p)->pIter = (p)->pClauses.pData + hClause; (pObj = *pIter); (p)->pIter++ ) +#define Cbs_ClauseForEachVar1( p, hClause, pObj ) \ + for ( (p)->pIter = (p)->pClauses.pData+hClause+1; (pObj = *pIter); (p)->pIter++ ) + //////////////////////////////////////////////////////////////////////// /// FUNCTION DEFINITIONS /// //////////////////////////////////////////////////////////////////////// @@ -129,10 +144,14 @@ Cbs_Man_t * Cbs_ManAlloc() { Cbs_Man_t * p; p = ABC_CALLOC( Cbs_Man_t, 1 ); - p->pProp.nSize = p->pJust.nSize = 10000; + p->pProp.nSize = p->pJust.nSize = p->pClauses.nSize = 10000; p->pProp.pData = ABC_ALLOC( Gia_Obj_t *, p->pProp.nSize ); p->pJust.pData = ABC_ALLOC( Gia_Obj_t *, p->pJust.nSize ); - p->vModel = Vec_IntAlloc( 1000 ); + p->pClauses.pData = ABC_ALLOC( Gia_Obj_t *, p->pClauses.nSize ); + p->pClauses.iHead = p->pClauses.iTail = 1; + p->vModel = Vec_IntAlloc( 1000 ); + p->vLevReas = Vec_IntAlloc( 1000 ); + p->vTemp = Vec_PtrAlloc( 1000 ); Cbs_SetDefaultParams( &p->Pars ); return p; } @@ -150,7 +169,10 @@ Cbs_Man_t * Cbs_ManAlloc() ***********************************************************************/ void Cbs_ManStop( Cbs_Man_t * p ) { + Vec_IntFree( p->vLevReas ); Vec_IntFree( p->vModel ); + Vec_PtrFree( p->vTemp ); + ABC_FREE( p->pClauses.pData ); ABC_FREE( p->pProp.pData ); ABC_FREE( p->pJust.pData ); ABC_FREE( p ); @@ -310,6 +332,26 @@ static inline void Cbs_QueRestore( Cbs_Que_t * p, int iHeadOld, int iTailOld ) p->iTail = iTailOld; } +/**Function************************************************************* + + Synopsis [Finalized the clause.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs_QueFinish( Cbs_Que_t * p ) +{ + int iHeadOld = p->iHead; + assert( p->iHead < p->iTail ); + Cbs_QuePush( p, NULL ); + p->iHead = p->iTail; + return iHeadOld; +} + /**Function************************************************************* @@ -400,7 +442,7 @@ static inline Gia_Obj_t * Cbs_ManDecideMaxFF( Cbs_Man_t * p ) pObjMax = pObj; } } - return pObjMax; + return pObjMax; } @@ -425,6 +467,7 @@ static inline void Cbs_ManCancelUntil( Cbs_Man_t * p, int iBound ) Cbs_QueForEachEntry( p->pProp, pVar, i ) Cbs_VarUnassign( pVar ); p->pProp.iTail = iBound; + Vec_IntShrink( p->vLevReas, 3*iBound ); } /**Function************************************************************* @@ -438,28 +481,244 @@ static inline void Cbs_ManCancelUntil( Cbs_Man_t * p, int iBound ) SeeAlso [] ***********************************************************************/ -static inline void Cbs_ManAssign( Cbs_Man_t * p, Gia_Obj_t * pObj ) +static inline void Cbs_ManAssign( Cbs_Man_t * p, Gia_Obj_t * pObj, int Level, Gia_Obj_t * pRes0, Gia_Obj_t * pRes1 ) { Gia_Obj_t * pObjR = Gia_Regular(pObj); assert( Gia_ObjIsCand(pObjR) ); assert( !Cbs_VarIsAssigned(pObjR) ); Cbs_VarAssign( pObjR ); Cbs_VarSetValue( pObjR, !Gia_IsComplement(pObj) ); + assert( pObjR->Value == ~0 ); + pObjR->Value = p->pProp.iTail; Cbs_QuePush( &p->pProp, pObjR ); + Vec_IntPush( p->vLevReas, Level ); + Vec_IntPush( p->vLevReas, pRes0 ? pRes0-pObjR : 0 ); + Vec_IntPush( p->vLevReas, pRes1 ? pRes1-pObjR : 0 ); + assert( Vec_IntSize(p->vLevReas) == 3 * p->pProp.iTail ); +} + + +/**Function************************************************************* + + Synopsis [Returns clause size.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs_ManClauseSize( Cbs_Man_t * p, int hClause ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t ** pIter; + for ( pIter = pQue->pData + hClause; *pIter; pIter++ ); + return pIter - pQue->pData - hClause ; +} + +/**Function************************************************************* + + Synopsis [Prints conflict clause.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs_ManPrintClause( Cbs_Man_t * p, int Level, int hClause ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t * pObj; + int i; + assert( Cbs_QueIsEmpty( pQue ) ); + printf( "Level %2d : ", Level ); + for ( i = hClause; (pObj = pQue->pData[i]); i++ ) + printf( "%d=%d(%d) ", Gia_ObjId(p->pAig, pObj), Cbs_VarValue(pObj), Cbs_VarDecLevel(p, pObj) ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Prints conflict clause.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs_ManPrintClauseNew( Cbs_Man_t * p, int Level, int hClause ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t * pObj; + int i; + assert( Cbs_QueIsEmpty( pQue ) ); + printf( "Level %2d : ", Level ); + for ( i = hClause; (pObj = pQue->pData[i]); i++ ) + printf( "%c%d ", Cbs_VarValue(pObj)? '+':'-', Gia_ObjId(p->pAig, pObj) ); + printf( "\n" ); +} + +/**Function************************************************************* + + Synopsis [Returns conflict clause.] + + Description [Performs conflict analysis.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs_ManDeriveReason( Cbs_Man_t * p, int Level ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t * pObj, * pReason; + int i, k, iLitLevel; + assert( pQue->pData[pQue->iHead] == NULL ); + assert( pQue->iHead + 1 < pQue->iTail ); +/* + for ( i = pQue->iHead + 1; i < pQue->iTail; i++ ) + { + pObj = pQue->pData[i]; + assert( pObj->fMark0 == 1 ); + } +*/ + // compact literals + Vec_PtrClear( p->vTemp ); + for ( i = k = pQue->iHead + 1; i < pQue->iTail; i++ ) + { + pObj = pQue->pData[i]; + if ( !pObj->fMark0 ) // unassigned - seen again + continue; + // assigned - seen first time + pObj->fMark0 = 0; + Vec_PtrPush( p->vTemp, pObj ); + // check decision level + iLitLevel = Cbs_VarDecLevel( p, pObj ); + if ( iLitLevel < Level ) + { + pQue->pData[k++] = pObj; + continue; + } + assert( iLitLevel == Level ); + pReason = Cbs_VarReason0( p, pObj ); + if ( pReason == pObj ) // no reason + { + assert( pQue->pData[pQue->iHead] == NULL ); + pQue->pData[pQue->iHead] = pObj; + continue; + } + Cbs_QuePush( pQue, pReason ); + pReason = Cbs_VarReason1( p, pObj ); + if ( pReason != pObj ) // second reason + Cbs_QuePush( pQue, pReason ); + } + assert( pQue->pData[pQue->iHead] != NULL ); + pQue->iTail = k; + // clear the marks + Vec_PtrForEachEntry( p->vTemp, pObj, i ) + pObj->fMark0 = 1; +} + +/**Function************************************************************* + + Synopsis [Returns conflict clause.] + + Description [Performs conflict analysis.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs_ManAnalyze( Cbs_Man_t * p, int Level, Gia_Obj_t * pVar, Gia_Obj_t * pFan0, Gia_Obj_t * pFan1 ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + assert( Cbs_VarIsAssigned(pVar) ); + assert( Cbs_VarIsAssigned(pFan0) ); + assert( pFan1 == NULL || Cbs_VarIsAssigned(pFan1) ); + assert( Cbs_QueIsEmpty( pQue ) ); + Cbs_QuePush( pQue, NULL ); + Cbs_QuePush( pQue, pVar ); + Cbs_QuePush( pQue, pFan0 ); + if ( pFan1 ) + Cbs_QuePush( pQue, pFan1 ); + Cbs_ManDeriveReason( p, Level ); + return Cbs_QueFinish( pQue ); +} + + +/**Function************************************************************* + + Synopsis [Performs resolution of two clauses.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs_ManResolve( Cbs_Man_t * p, int Level, int hClause0, int hClause1 ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t * pObj; + int i, LevelMax = -1, LevelCur; + assert( pQue->pData[hClause0] != NULL ); + assert( pQue->pData[hClause0] == pQue->pData[hClause1] ); +/* + for ( i = hClause0 + 1; (pObj = pQue->pData[i]); i++ ) + assert( pObj->fMark0 == 1 ); + for ( i = hClause1 + 1; (pObj = pQue->pData[i]); i++ ) + assert( pObj->fMark0 == 1 ); +*/ + assert( Cbs_QueIsEmpty( pQue ) ); + Cbs_QuePush( pQue, NULL ); + for ( i = hClause0 + 1; (pObj = pQue->pData[i]); i++ ) + { + if ( !pObj->fMark0 ) // unassigned - seen again + continue; + // assigned - seen first time + pObj->fMark0 = 0; + Cbs_QuePush( pQue, pObj ); + LevelCur = Cbs_VarDecLevel( p, pObj ); + if ( LevelMax < LevelCur ) + LevelMax = LevelCur; + } + for ( i = hClause1 + 1; (pObj = pQue->pData[i]); i++ ) + { + if ( !pObj->fMark0 ) // unassigned - seen again + continue; + // assigned - seen first time + pObj->fMark0 = 0; + Cbs_QuePush( pQue, pObj ); + LevelCur = Cbs_VarDecLevel( p, pObj ); + if ( LevelMax < LevelCur ) + LevelMax = LevelCur; + } + for ( i = pQue->iHead + 1; i < pQue->iTail; i++ ) + pQue->pData[i]->fMark0 = 1; + Cbs_ManDeriveReason( p, LevelMax ); + return Cbs_QueFinish( pQue ); } /**Function************************************************************* Synopsis [Propagates a variable.] - Description [Returns 1 if conflict; 0 if no conflict.] + Description [Returns clause handle if conflict; 0 if no conflict.] SideEffects [] SeeAlso [] ***********************************************************************/ -static inline int Cbs_ManPropagateOne( Cbs_Man_t * p, Gia_Obj_t * pVar ) +static inline int Cbs_ManPropagateOne( Cbs_Man_t * p, Gia_Obj_t * pVar, int Level ) { int Value0, Value1; assert( !Gia_IsComplement(pVar) ); @@ -472,24 +731,31 @@ static inline int Cbs_ManPropagateOne( Cbs_Man_t * p, Gia_Obj_t * pVar ) if ( Cbs_VarValue(pVar) ) { // value is 1 if ( Value0 == 0 || Value1 == 0 ) // one is 0 - return 1; + { + if ( Value0 == 0 && Value1 != 0 ) + return Cbs_ManAnalyze( p, Level, pVar, Gia_ObjFanin0(pVar), NULL ); + if ( Value0 != 0 && Value1 == 0 ) + return Cbs_ManAnalyze( p, Level, pVar, Gia_ObjFanin1(pVar), NULL ); + assert( Value0 == 0 && Value1 == 0 ); + return Cbs_ManAnalyze( p, Level, pVar, Gia_ObjFanin0(pVar), Gia_ObjFanin1(pVar) ); + } if ( Value0 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_ObjChild0(pVar) ); + Cbs_ManAssign( p, Gia_ObjChild0(pVar), Level, pVar, NULL ); if ( Value1 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_ObjChild1(pVar) ); + Cbs_ManAssign( p, Gia_ObjChild1(pVar), Level, pVar, NULL ); return 0; } // value is 0 if ( Value0 == 0 || Value1 == 0 ) // one is 0 return 0; if ( Value0 == 1 && Value1 == 1 ) // both are 1 - return 1; + return Cbs_ManAnalyze( p, Level, pVar, Gia_ObjFanin0(pVar), Gia_ObjFanin1(pVar) ); if ( Value0 == 1 || Value1 == 1 ) // one is 1 { if ( Value0 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); - if ( Value1 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); + Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)), Level, pVar, Gia_ObjFanin1(pVar) ); + if ( Value1 == 2 ) // second is unassigned + Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)), Level, pVar, Gia_ObjFanin0(pVar) ); return 0; } assert( Cbs_VarIsJust(pVar) ); @@ -509,7 +775,7 @@ static inline int Cbs_ManPropagateOne( Cbs_Man_t * p, Gia_Obj_t * pVar ) SeeAlso [] ***********************************************************************/ -static inline int Cbs_ManPropagateTwo( Cbs_Man_t * p, Gia_Obj_t * pVar ) +static inline int Cbs_ManPropagateTwo( Cbs_Man_t * p, Gia_Obj_t * pVar, int Level ) { int Value0, Value1; assert( !Gia_IsComplement(pVar) ); @@ -522,12 +788,12 @@ static inline int Cbs_ManPropagateTwo( Cbs_Man_t * p, Gia_Obj_t * pVar ) if ( Value0 == 0 || Value1 == 0 ) // one is 0 return 0; if ( Value0 == 1 && Value1 == 1 ) // both are 1 - return 1; + return Cbs_ManAnalyze( p, Level, pVar, Gia_ObjFanin0(pVar), Gia_ObjFanin1(pVar) ); assert( Value0 == 1 || Value1 == 1 ); if ( Value0 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); + Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)), Level, pVar, Gia_ObjFanin1(pVar) ); if ( Value1 == 2 ) // first is unassigned - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); + Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)), Level, pVar, Gia_ObjFanin0(pVar) ); return 0; } @@ -542,16 +808,17 @@ static inline int Cbs_ManPropagateTwo( Cbs_Man_t * p, Gia_Obj_t * pVar ) SeeAlso [] ***********************************************************************/ -int Cbs_ManPropagate( Cbs_Man_t * p ) +int Cbs_ManPropagate( Cbs_Man_t * p, int Level ) { + int hClause; Gia_Obj_t * pVar; int i, k; while ( 1 ) { Cbs_QueForEachEntry( p->pProp, pVar, i ) { - if ( Cbs_ManPropagateOne( p, pVar ) ) - return 1; + if ( (hClause = Cbs_ManPropagateOne( p, pVar, Level )) ) + return hClause; } p->pProp.iHead = p->pProp.iTail; k = p->pJust.iHead; @@ -559,8 +826,8 @@ int Cbs_ManPropagate( Cbs_Man_t * p ) { if ( Cbs_VarIsJust( pVar ) ) p->pJust.pData[k++] = pVar; - else if ( Cbs_ManPropagateTwo( p, pVar ) ) - return 1; + else if ( (hClause = Cbs_ManPropagateTwo( p, pVar, Level )) ) + return hClause; } if ( k == p->pJust.iTail ) break; @@ -573,30 +840,31 @@ int Cbs_ManPropagate( Cbs_Man_t * p ) Synopsis [Solve the problem recursively.] - Description [Returns 1 if unsat or undecided; 0 if satisfiable.] + Description [Returns learnt clause if unsat, NULL if sat or undecided.] SideEffects [] SeeAlso [] - + ***********************************************************************/ -int Cbs_ManSolve_rec( Cbs_Man_t * p ) -{ - Gia_Obj_t * pVar; +int Cbs_ManSolve_rec( Cbs_Man_t * p, int Level ) +{ + Cbs_Que_t * pQue = &(p->pClauses); + Gia_Obj_t * pVar, * pDecVar; + int hClause, hLearn0, hLearn1; int iPropHead, iJustHead, iJustTail; // propagate assignments assert( !Cbs_QueIsEmpty(&p->pProp) ); - if ( Cbs_ManPropagate( p ) ) - return 1; + if ( (hClause = Cbs_ManPropagate( p, Level )) ) + return hClause; // check for satisfying assignment assert( Cbs_QueIsEmpty(&p->pProp) ); if ( Cbs_QueIsEmpty(&p->pJust) ) return 0; // quit using resource limits - p->Pars.nBTThis++; p->Pars.nJustThis = ABC_MAX( p->Pars.nJustThis, p->pJust.iTail - p->pJust.iHead ); if ( Cbs_ManCheckLimits( p ) ) - return 1; + return 0; // remember the state before branching iPropHead = p->pProp.iHead; Cbs_QueStore( &p->pJust, &iJustHead, &iJustTail ); @@ -609,38 +877,31 @@ int Cbs_ManSolve_rec( Cbs_Man_t * p ) pVar = Cbs_ManDecideMaxFF( p ); else assert( 0 ); assert( Cbs_VarIsJust( pVar ) ); - // decide using fanout count! - if ( Gia_ObjRefs(p->pAig, Gia_ObjFanin0(pVar)) < Gia_ObjRefs(p->pAig, Gia_ObjFanin1(pVar)) ) - { - // decide on first fanin - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); - if ( !Cbs_ManSolve_rec( p ) ) - return 0; - if ( Cbs_ManCheckLimits( p ) ) - return 1; - Cbs_ManCancelUntil( p, iPropHead ); - Cbs_QueRestore( &p->pJust, iJustHead, iJustTail ); - // decide on second fanin - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); - } + // chose decision variable using fanout count + if ( Gia_ObjRefs(p->pAig, Gia_ObjFanin0(pVar)) > Gia_ObjRefs(p->pAig, Gia_ObjFanin1(pVar)) ) + pDecVar = Gia_Not(Gia_ObjChild0(pVar)); else - { - // decide on first fanin - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); - if ( !Cbs_ManSolve_rec( p ) ) - return 0; - if ( Cbs_ManCheckLimits( p ) ) - return 1; - Cbs_ManCancelUntil( p, iPropHead ); - Cbs_QueRestore( &p->pJust, iJustHead, iJustTail ); - // decide on second fanin - Cbs_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); - } - if ( !Cbs_ManSolve_rec( p ) ) + pDecVar = Gia_Not(Gia_ObjChild1(pVar)); + // decide on first fanin + Cbs_ManAssign( p, pDecVar, Level+1, NULL, NULL ); + if ( !(hLearn0 = Cbs_ManSolve_rec( p, Level+1 )) ) return 0; - if ( Cbs_ManCheckLimits( p ) ) - return 1; - return 1; + if ( pQue->pData[hLearn0] != Gia_Regular(pDecVar) ) + return hLearn0; + Cbs_ManCancelUntil( p, iPropHead ); + Cbs_QueRestore( &p->pJust, iJustHead, iJustTail ); + // decide on second fanin + Cbs_ManAssign( p, Gia_Not(pDecVar), Level+1, NULL, NULL ); + if ( !(hLearn1 = Cbs_ManSolve_rec( p, Level+1 )) ) + return 0; + if ( pQue->pData[hLearn1] != Gia_Regular(pDecVar) ) + return hLearn1; + hClause = Cbs_ManResolve( p, Level, hLearn0, hLearn1 ); +// Cbs_ManPrintClauseNew( p, Level, hClause ); +// if ( Level > Cbs_ClauseDecLevel(p, hClause) ) +// p->Pars.nBTThisNc++; + p->Pars.nBTThis++; + return hClause; } /**Function************************************************************* @@ -658,103 +919,28 @@ int Cbs_ManSolve_rec( Cbs_Man_t * p ) ***********************************************************************/ int Cbs_ManSolve( Cbs_Man_t * p, Gia_Obj_t * pObj ) { -// Gia_Obj_t * pTemp; -// int i; - int RetValue; -// Gia_ManForEachObj( p->pAig, pTemp, i ) -// assert( pTemp->fMark0 == 0 ); + int RetValue = 0; assert( !p->pProp.iHead && !p->pProp.iTail ); assert( !p->pJust.iHead && !p->pJust.iTail ); - p->Pars.nBTThis = p->Pars.nJustThis = 0; - Cbs_ManAssign( p, pObj ); - RetValue = Cbs_ManSolve_rec( p ); - if ( RetValue == 0 ) + assert( p->pClauses.iHead == 1 && p->pClauses.iTail == 1 ); + p->Pars.nBTThis = p->Pars.nJustThis = p->Pars.nBTThisNc = 0; + Cbs_ManAssign( p, pObj, 0, NULL, NULL ); + if ( !Cbs_ManSolve_rec(p, 0) && !Cbs_ManCheckLimits(p) ) Cbs_ManSaveModel( p, p->vModel ); + else + RetValue = 1; Cbs_ManCancelUntil( p, 0 ); p->pJust.iHead = p->pJust.iTail = 0; + p->pClauses.iHead = p->pClauses.iTail = 1; p->Pars.nBTTotal += p->Pars.nBTThis; p->Pars.nJustTotal = ABC_MAX( p->Pars.nJustTotal, p->Pars.nJustThis ); if ( Cbs_ManCheckLimits( p ) ) - return -1; + RetValue = -1; return RetValue; } /**Function************************************************************* - Synopsis [Procedure to test the new SAT solver.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Cbs_ManSolveTest( Gia_Man_t * pGia ) -{ - extern void Gia_SatVerifyPattern( Gia_Man_t * p, Gia_Obj_t * pRoot, Vec_Int_t * vCex, Vec_Int_t * vVisit ); - int nConfsMax = 1000; - int CountUnsat, CountSat, CountUndec; - Cbs_Man_t * p; - Vec_Int_t * vCex; - Vec_Int_t * vVisit; - Gia_Obj_t * pRoot; - int i, RetValue, clk = clock(); - Gia_ManCreateRefs( pGia ); - // create logic network - p = Cbs_ManAlloc(); - p->pAig = pGia; - // prepare AIG - Gia_ManCleanValue( pGia ); - Gia_ManCleanMark0( pGia ); - Gia_ManCleanMark1( pGia ); -// vCex = Vec_IntAlloc( 100 ); - vVisit = Vec_IntAlloc( 100 ); - // solve for each output - CountUnsat = CountSat = CountUndec = 0; - Gia_ManForEachCo( pGia, pRoot, i ) - { - if ( Gia_ObjIsConst0(Gia_ObjFanin0(pRoot)) ) - continue; - -// Gia_ManIncrementTravId( pGia ); - -//printf( "Output %6d : ", i ); -// iLit = Gia_Var2Lit( Gia_ObjHandle(Gia_ObjFanin0(pRoot)), Gia_ObjFaninC0(pRoot) ); -// RetValue = Cbs_ManSolve( p, &iLit, 1, nConfsMax, vCex ); - RetValue = Cbs_ManSolve( p, Gia_ObjChild0(pRoot) ); - if ( RetValue == 1 ) - CountUnsat++; - else if ( RetValue == -1 ) - CountUndec++; - else - { -// int iLit, k; - vCex = Cbs_ReadModel( p ); - -// printf( "complemented = %d. ", Gia_ObjFaninC0(pRoot) ); -//printf( "conflicts = %6d max-frontier = %6d \n", p->Pars.nBTThis, p->Pars.nJustThis ); -// Vec_IntForEachEntry( vCex, iLit, k ) -// printf( "%s%d ", Gia_LitIsCompl(iLit)? "!": "", Gia_ObjCioId(Gia_ManObj(pGia,Gia_Lit2Var(iLit))) ); -// printf( "\n" ); - - Gia_SatVerifyPattern( pGia, pRoot, vCex, vVisit ); - assert( RetValue == 0 ); - CountSat++; - } -// Gia_ManCheckMark0( p ); -// Gia_ManCheckMark1( p ); - } - Cbs_ManStop( p ); -// Vec_IntFree( vCex ); - Vec_IntFree( vVisit ); - printf( "Unsat = %d. Sat = %d. Undec = %d. ", CountUnsat, CountSat, CountUndec ); - ABC_PRT( "Time", clock() - clk ); -} - - -/**Function************************************************************* - Synopsis [Prints statistics of the manager.] Description [] @@ -793,7 +979,7 @@ void Cbs_ManSatPrintStats( Cbs_Man_t * p ) SeeAlso [] ***********************************************************************/ -Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStatus ) +Vec_Int_t * Cbs_ManSolveMiterNc( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStatus, int fVerbose ) { extern void Cec_ManSatAddToStore( Vec_Int_t * vCexStore, Vec_Int_t * vCex, int Out ); Cbs_Man_t * p; @@ -806,6 +992,7 @@ Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStat Gia_ManCreateRefs( pAig ); Gia_ManCleanMark0( pAig ); Gia_ManCleanMark1( pAig ); + Gia_ManFillValue( pAig ); // maps nodes into trail ids // create logic network p = Cbs_ManAlloc(); p->Pars.nBTLimit = nConfs; @@ -829,7 +1016,7 @@ Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStat } else { - printf( "Constant 0 output of SRM!!!\n" ); +// printf( "Constant 0 output of SRM!!!\n" ); Vec_StrPush( vStatus, 1 ); } continue; @@ -838,12 +1025,15 @@ Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStat p->Pars.fUseHighest = 1; p->Pars.fUseLowest = 0; status = Cbs_ManSolve( p, Gia_ObjChild0(pRoot) ); +// printf( "\n" ); +/* if ( status == -1 ) { p->Pars.fUseHighest = 0; p->Pars.fUseLowest = 1; status = Cbs_ManSolve( p, Gia_ObjChild0(pRoot) ); } +*/ Vec_StrPush( vStatus, (char)status ); if ( status == -1 ) { @@ -861,7 +1051,7 @@ Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStat continue; } p->nSatSat++; - p->nConfUnsat += p->Pars.nBTThis; + p->nConfSat += p->Pars.nBTThis; // Gia_SatVerifyPattern( pAig, pRoot, vCex, vVisit ); Cec_ManSatAddToStore( vCexStore, vCex, i ); p->timeSatSat += clock() - clk; @@ -869,9 +1059,12 @@ Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStat Vec_IntFree( vVisit ); p->nSatTotal = Gia_ManPoNum(pAig); p->timeTotal = clock() - clkTotal; -// Cbs_ManSatPrintStats( p ); + if ( fVerbose ) + Cbs_ManSatPrintStats( p ); +// printf( "RecCalls = %8d. RecClause = %8d. RecNonChro = %8d.\n", p->nRecCall, p->nRecClause, p->nRecNonChro ); Cbs_ManStop( p ); *pvStatus = vStatus; + // printf( "Total number of cex literals = %d. (Ave = %d)\n", // Vec_IntSize(vCexStore)-2*p->nSatUndec-2*p->nSatSat, // (Vec_IntSize(vCexStore)-2*p->nSatUndec-2*p->nSatSat)/p->nSatSat ); diff --git a/src/aig/gia/giaCSatOld.c b/src/aig/gia/giaCSatOld.c new file mode 100644 index 00000000..409af56c --- /dev/null +++ b/src/aig/gia/giaCSatOld.c @@ -0,0 +1,797 @@ +/**CFile**************************************************************** + + FileName [giaCSat.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Scalable AIG package.] + + Synopsis [A simple circuit-based solver.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: giaCSat.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "gia.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +typedef struct Cbs0_Par_t_ Cbs0_Par_t; +struct Cbs0_Par_t_ +{ + // conflict limits + int nBTLimit; // limit on the number of conflicts + int nJustLimit; // limit on the size of justification queue + // current parameters + int nBTThis; // number of conflicts + int nJustThis; // max size of the frontier + int nBTTotal; // total number of conflicts + int nJustTotal; // total size of the frontier + // decision heuristics + int fUseHighest; // use node with the highest ID + int fUseLowest; // use node with the highest ID + int fUseMaxFF; // use node with the largest fanin fanout + // other + int fVerbose; +}; + +typedef struct Cbs0_Que_t_ Cbs0_Que_t; +struct Cbs0_Que_t_ +{ + int iHead; // beginning of the queue + int iTail; // end of the queue + int nSize; // allocated size + Gia_Obj_t ** pData; // nodes stored in the queue +}; + +typedef struct Cbs0_Man_t_ Cbs0_Man_t; +struct Cbs0_Man_t_ +{ + Cbs0_Par_t Pars; // parameters + Gia_Man_t * pAig; // AIG manager + Cbs0_Que_t pProp; // propagation queue + Cbs0_Que_t pJust; // justification queue + Vec_Int_t * vModel; // satisfying assignment + // SAT calls statistics + int nSatUnsat; // the number of proofs + int nSatSat; // the number of failure + int nSatUndec; // the number of timeouts + int nSatTotal; // the number of calls + // conflicts + int nConfUnsat; // conflicts in unsat problems + int nConfSat; // conflicts in sat problems + int nConfUndec; // conflicts in undec problems + // runtime stats + int timeSatUnsat; // unsat + int timeSatSat; // sat + int timeSatUndec; // undecided + int timeTotal; // total runtime +}; + +static inline int Cbs0_VarIsAssigned( Gia_Obj_t * pVar ) { return pVar->fMark0; } +static inline void Cbs0_VarAssign( Gia_Obj_t * pVar ) { assert(!pVar->fMark0); pVar->fMark0 = 1; } +static inline void Cbs0_VarUnassign( Gia_Obj_t * pVar ) { assert(pVar->fMark0); pVar->fMark0 = 0; pVar->fMark1 = 0; } +static inline int Cbs0_VarValue( Gia_Obj_t * pVar ) { assert(pVar->fMark0); return pVar->fMark1; } +static inline void Cbs0_VarSetValue( Gia_Obj_t * pVar, int v ) { assert(pVar->fMark0); pVar->fMark1 = v; } +static inline int Cbs0_VarIsJust( Gia_Obj_t * pVar ) { return Gia_ObjIsAnd(pVar) && !Cbs0_VarIsAssigned(Gia_ObjFanin0(pVar)) && !Cbs0_VarIsAssigned(Gia_ObjFanin1(pVar)); } +static inline int Cbs0_VarFanin0Value( Gia_Obj_t * pVar ) { return !Cbs0_VarIsAssigned(Gia_ObjFanin0(pVar)) ? 2 : (Cbs0_VarValue(Gia_ObjFanin0(pVar)) ^ Gia_ObjFaninC0(pVar)); } +static inline int Cbs0_VarFanin1Value( Gia_Obj_t * pVar ) { return !Cbs0_VarIsAssigned(Gia_ObjFanin1(pVar)) ? 2 : (Cbs0_VarValue(Gia_ObjFanin1(pVar)) ^ Gia_ObjFaninC1(pVar)); } + +#define Cbs0_QueForEachEntry( Que, pObj, i ) \ + for ( i = (Que).iHead; (i < (Que).iTail) && ((pObj) = (Que).pData[i]); i++ ) + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Sets default values of the parameters.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cbs0_SetDefaultParams( Cbs0_Par_t * pPars ) +{ + memset( pPars, 0, sizeof(Cbs0_Par_t) ); + pPars->nBTLimit = 1000; // limit on the number of conflicts + pPars->nJustLimit = 100; // limit on the size of justification queue + pPars->fUseHighest = 1; // use node with the highest ID + pPars->fUseLowest = 0; // use node with the highest ID + pPars->fUseMaxFF = 0; // use node with the largest fanin fanout + pPars->fVerbose = 1; // print detailed statistics +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Cbs0_Man_t * Cbs0_ManAlloc() +{ + Cbs0_Man_t * p; + p = ABC_CALLOC( Cbs0_Man_t, 1 ); + p->pProp.nSize = p->pJust.nSize = 10000; + p->pProp.pData = ABC_ALLOC( Gia_Obj_t *, p->pProp.nSize ); + p->pJust.pData = ABC_ALLOC( Gia_Obj_t *, p->pJust.nSize ); + p->vModel = Vec_IntAlloc( 1000 ); + Cbs0_SetDefaultParams( &p->Pars ); + return p; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cbs0_ManStop( Cbs0_Man_t * p ) +{ + Vec_IntFree( p->vModel ); + ABC_FREE( p->pProp.pData ); + ABC_FREE( p->pJust.pData ); + ABC_FREE( p ); +} + +/**Function************************************************************* + + Synopsis [Returns satisfying assignment.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Cbs0_ReadModel( Cbs0_Man_t * p ) +{ + return p->vModel; +} + + + + +/**Function************************************************************* + + Synopsis [Returns 1 if the solver is out of limits.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_ManCheckLimits( Cbs0_Man_t * p ) +{ + return p->Pars.nJustThis > p->Pars.nJustLimit || p->Pars.nBTThis > p->Pars.nBTLimit; +} + +/**Function************************************************************* + + Synopsis [Saves the satisfying assignment as an array of literals.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_ManSaveModel( Cbs0_Man_t * p, Vec_Int_t * vCex ) +{ + Gia_Obj_t * pVar; + int i; + Vec_IntClear( vCex ); + p->pProp.iHead = 0; + Cbs0_QueForEachEntry( p->pProp, pVar, i ) + if ( Gia_ObjIsCi(pVar) ) +// Vec_IntPush( vCex, Gia_Var2Lit(Gia_ObjId(p->pAig,pVar), !Cbs0_VarValue(pVar)) ); + Vec_IntPush( vCex, Gia_Var2Lit(Gia_ObjCioId(pVar), !Cbs0_VarValue(pVar)) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_QueIsEmpty( Cbs0_Que_t * p ) +{ + return p->iHead == p->iTail; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_QuePush( Cbs0_Que_t * p, Gia_Obj_t * pObj ) +{ + if ( p->iTail == p->nSize ) + { + p->nSize *= 2; + p->pData = ABC_REALLOC( Gia_Obj_t *, p->pData, p->nSize ); + } + p->pData[p->iTail++] = pObj; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if the object in the queue.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_QueHasNode( Cbs0_Que_t * p, Gia_Obj_t * pObj ) +{ + Gia_Obj_t * pTemp; + int i; + Cbs0_QueForEachEntry( *p, pTemp, i ) + if ( pTemp == pObj ) + return 1; + return 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_QueStore( Cbs0_Que_t * p, int * piHeadOld, int * piTailOld ) +{ + int i; + *piHeadOld = p->iHead; + *piTailOld = p->iTail; + for ( i = *piHeadOld; i < *piTailOld; i++ ) + Cbs0_QuePush( p, p->pData[i] ); + p->iHead = *piTailOld; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_QueRestore( Cbs0_Que_t * p, int iHeadOld, int iTailOld ) +{ + p->iHead = iHeadOld; + p->iTail = iTailOld; +} + + +/**Function************************************************************* + + Synopsis [Max number of fanins fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_VarFaninFanoutMax( Cbs0_Man_t * p, Gia_Obj_t * pObj ) +{ + int Count0, Count1; + assert( !Gia_IsComplement(pObj) ); + assert( Gia_ObjIsAnd(pObj) ); + Count0 = Gia_ObjRefs( p->pAig, Gia_ObjFanin0(pObj) ); + Count1 = Gia_ObjRefs( p->pAig, Gia_ObjFanin1(pObj) ); + return ABC_MAX( Count0, Count1 ); +} + +/**Function************************************************************* + + Synopsis [Find variable with the highest ID.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Gia_Obj_t * Cbs0_ManDecideHighest( Cbs0_Man_t * p ) +{ + Gia_Obj_t * pObj, * pObjMax = NULL; + int i; + Cbs0_QueForEachEntry( p->pJust, pObj, i ) + if ( pObjMax == NULL || pObjMax < pObj ) + pObjMax = pObj; + return pObjMax; +} + +/**Function************************************************************* + + Synopsis [Find variable with the lowest ID.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Gia_Obj_t * Cbs0_ManDecideLowest( Cbs0_Man_t * p ) +{ + Gia_Obj_t * pObj, * pObjMin = NULL; + int i; + Cbs0_QueForEachEntry( p->pJust, pObj, i ) + if ( pObjMin == NULL || pObjMin > pObj ) + pObjMin = pObj; + return pObjMin; +} + +/**Function************************************************************* + + Synopsis [Find variable with the maximum number of fanin fanouts.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline Gia_Obj_t * Cbs0_ManDecideMaxFF( Cbs0_Man_t * p ) +{ + Gia_Obj_t * pObj, * pObjMax = NULL; + int i, iMaxFF = 0, iCurFF; + assert( p->pAig->pRefs != NULL ); + Cbs0_QueForEachEntry( p->pJust, pObj, i ) + { + iCurFF = Cbs0_VarFaninFanoutMax( p, pObj ); + assert( iCurFF > 0 ); + if ( iMaxFF < iCurFF ) + { + iMaxFF = iCurFF; + pObjMax = pObj; + } + } + return pObjMax; +} + + + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_ManCancelUntil( Cbs0_Man_t * p, int iBound ) +{ + Gia_Obj_t * pVar; + int i; + assert( iBound <= p->pProp.iTail ); + p->pProp.iHead = iBound; + Cbs0_QueForEachEntry( p->pProp, pVar, i ) + Cbs0_VarUnassign( pVar ); + p->pProp.iTail = iBound; +} + +/**Function************************************************************* + + Synopsis [Assigns the variables a value.] + + Description [Returns 1 if conflict; 0 if no conflict.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Cbs0_ManAssign( Cbs0_Man_t * p, Gia_Obj_t * pObj ) +{ + Gia_Obj_t * pObjR = Gia_Regular(pObj); + assert( Gia_ObjIsCand(pObjR) ); + assert( !Cbs0_VarIsAssigned(pObjR) ); + Cbs0_VarAssign( pObjR ); + Cbs0_VarSetValue( pObjR, !Gia_IsComplement(pObj) ); + Cbs0_QuePush( &p->pProp, pObjR ); +} + +/**Function************************************************************* + + Synopsis [Propagates a variable.] + + Description [Returns 1 if conflict; 0 if no conflict.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_ManPropagateOne( Cbs0_Man_t * p, Gia_Obj_t * pVar ) +{ + int Value0, Value1; + assert( !Gia_IsComplement(pVar) ); + assert( Cbs0_VarIsAssigned(pVar) ); + if ( Gia_ObjIsCi(pVar) ) + return 0; + assert( Gia_ObjIsAnd(pVar) ); + Value0 = Cbs0_VarFanin0Value(pVar); + Value1 = Cbs0_VarFanin1Value(pVar); + if ( Cbs0_VarValue(pVar) ) + { // value is 1 + if ( Value0 == 0 || Value1 == 0 ) // one is 0 + return 1; + if ( Value0 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_ObjChild0(pVar) ); + if ( Value1 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_ObjChild1(pVar) ); + return 0; + } + // value is 0 + if ( Value0 == 0 || Value1 == 0 ) // one is 0 + return 0; + if ( Value0 == 1 && Value1 == 1 ) // both are 1 + return 1; + if ( Value0 == 1 || Value1 == 1 ) // one is 1 + { + if ( Value0 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); + if ( Value1 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); + return 0; + } + assert( Cbs0_VarIsJust(pVar) ); + assert( !Cbs0_QueHasNode( &p->pJust, pVar ) ); + Cbs0_QuePush( &p->pJust, pVar ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Propagates a variable.] + + Description [Returns 1 if conflict; 0 if no conflict.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Cbs0_ManPropagateTwo( Cbs0_Man_t * p, Gia_Obj_t * pVar ) +{ + int Value0, Value1; + assert( !Gia_IsComplement(pVar) ); + assert( Gia_ObjIsAnd(pVar) ); + assert( Cbs0_VarIsAssigned(pVar) ); + assert( !Cbs0_VarValue(pVar) ); + Value0 = Cbs0_VarFanin0Value(pVar); + Value1 = Cbs0_VarFanin1Value(pVar); + // value is 0 + if ( Value0 == 0 || Value1 == 0 ) // one is 0 + return 0; + if ( Value0 == 1 && Value1 == 1 ) // both are 1 + return 1; + assert( Value0 == 1 || Value1 == 1 ); + if ( Value0 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_Not(Gia_ObjChild0(pVar)) ); + if ( Value1 == 2 ) // first is unassigned + Cbs0_ManAssign( p, Gia_Not(Gia_ObjChild1(pVar)) ); + return 0; +} + +/**Function************************************************************* + + Synopsis [Propagates all variables.] + + Description [Returns 1 if conflict; 0 if no conflict.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cbs0_ManPropagate( Cbs0_Man_t * p ) +{ + Gia_Obj_t * pVar; + int i, k; + while ( 1 ) + { + Cbs0_QueForEachEntry( p->pProp, pVar, i ) + { + if ( Cbs0_ManPropagateOne( p, pVar ) ) + return 1; + } + p->pProp.iHead = p->pProp.iTail; + k = p->pJust.iHead; + Cbs0_QueForEachEntry( p->pJust, pVar, i ) + { + if ( Cbs0_VarIsJust( pVar ) ) + p->pJust.pData[k++] = pVar; + else if ( Cbs0_ManPropagateTwo( p, pVar ) ) + return 1; + } + if ( k == p->pJust.iTail ) + break; + p->pJust.iTail = k; + } + return 0; +} + +/**Function************************************************************* + + Synopsis [Solve the problem recursively.] + + Description [Returns 1 if unsat or undecided; 0 if satisfiable.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cbs0_ManSolve_rec( Cbs0_Man_t * p ) +{ + Gia_Obj_t * pVar, * pDecVar; + int iPropHead, iJustHead, iJustTail; + // propagate assignments + assert( !Cbs0_QueIsEmpty(&p->pProp) ); + if ( Cbs0_ManPropagate( p ) ) + return 1; + // check for satisfying assignment + assert( Cbs0_QueIsEmpty(&p->pProp) ); + if ( Cbs0_QueIsEmpty(&p->pJust) ) + return 0; + // quit using resource limits + p->Pars.nJustThis = ABC_MAX( p->Pars.nJustThis, p->pJust.iTail - p->pJust.iHead ); + if ( Cbs0_ManCheckLimits( p ) ) + return 0; + // remember the state before branching + iPropHead = p->pProp.iHead; + Cbs0_QueStore( &p->pJust, &iJustHead, &iJustTail ); + // find the decision variable + if ( p->Pars.fUseHighest ) + pVar = Cbs0_ManDecideHighest( p ); + else if ( p->Pars.fUseLowest ) + pVar = Cbs0_ManDecideLowest( p ); + else if ( p->Pars.fUseMaxFF ) + pVar = Cbs0_ManDecideMaxFF( p ); + else assert( 0 ); + assert( Cbs0_VarIsJust( pVar ) ); + // chose decision variable using fanout count + if ( Gia_ObjRefs(p->pAig, Gia_ObjFanin0(pVar)) > Gia_ObjRefs(p->pAig, Gia_ObjFanin1(pVar)) ) + pDecVar = Gia_Not(Gia_ObjChild0(pVar)); + else + pDecVar = Gia_Not(Gia_ObjChild1(pVar)); + // decide on first fanin + Cbs0_ManAssign( p, pDecVar ); + if ( !Cbs0_ManSolve_rec( p ) ) + return 0; + Cbs0_ManCancelUntil( p, iPropHead ); + Cbs0_QueRestore( &p->pJust, iJustHead, iJustTail ); + // decide on second fanin + Cbs0_ManAssign( p, Gia_Not(pDecVar) ); + if ( !Cbs0_ManSolve_rec( p ) ) + return 0; + p->Pars.nBTThis++; + return 1; +} + +/**Function************************************************************* + + Synopsis [Looking for a satisfying assignment of the node.] + + Description [Assumes that each node has flag pObj->fMark0 set to 0. + Returns 1 if unsatisfiable, 0 if satisfiable, and -1 if undecided. + The node may be complemented. ] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Cbs0_ManSolve( Cbs0_Man_t * p, Gia_Obj_t * pObj ) +{ + int RetValue; + assert( !p->pProp.iHead && !p->pProp.iTail ); + assert( !p->pJust.iHead && !p->pJust.iTail ); + p->Pars.nBTThis = p->Pars.nJustThis = 0; + Cbs0_ManAssign( p, pObj ); + RetValue = Cbs0_ManSolve_rec( p ); + if ( RetValue == 0 && !Cbs0_ManCheckLimits(p) ) + Cbs0_ManSaveModel( p, p->vModel ); + Cbs0_ManCancelUntil( p, 0 ); + p->pJust.iHead = p->pJust.iTail = 0; + p->Pars.nBTTotal += p->Pars.nBTThis; + p->Pars.nJustTotal = ABC_MAX( p->Pars.nJustTotal, p->Pars.nJustThis ); + if ( Cbs0_ManCheckLimits( p ) ) + RetValue = -1; +// printf( "Outcome = %2d. Confs = %6d. Decision level max = %3d.\n", +// RetValue, p->Pars.nBTThis, p->DecLevelMax ); + return RetValue; +} + +/**Function************************************************************* + + Synopsis [Prints statistics of the manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Cbs0_ManSatPrintStats( Cbs0_Man_t * p ) +{ + printf( "CO = %6d ", Gia_ManCoNum(p->pAig) ); + printf( "Conf = %5d ", p->Pars.nBTLimit ); + printf( "JustMax = %5d ", p->Pars.nJustLimit ); + printf( "\n" ); + printf( "Unsat calls %6d (%6.2f %%) Ave conf = %8.1f ", + p->nSatUnsat, 100.0*p->nSatUnsat/p->nSatTotal, p->nSatUnsat? 1.0*p->nConfUnsat/p->nSatUnsat :0.0 ); + ABC_PRTP( "Time", p->timeSatUnsat, p->timeTotal ); + printf( "Sat calls %6d (%6.2f %%) Ave conf = %8.1f ", + p->nSatSat, 100.0*p->nSatSat/p->nSatTotal, p->nSatSat? 1.0*p->nConfSat/p->nSatSat : 0.0 ); + ABC_PRTP( "Time", p->timeSatSat, p->timeTotal ); + printf( "Undef calls %6d (%6.2f %%) Ave conf = %8.1f ", + p->nSatUndec, 100.0*p->nSatUndec/p->nSatTotal, p->nSatUndec? 1.0*p->nConfUndec/p->nSatUndec : 0.0 ); + ABC_PRTP( "Time", p->timeSatUndec, p->timeTotal ); + ABC_PRT( "Total time", p->timeTotal ); +} + +/**Function************************************************************* + + Synopsis [Procedure to test the new SAT solver.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Cbs_ManSolveMiter( Gia_Man_t * pAig, int nConfs, Vec_Str_t ** pvStatus, int fVerbose ) +{ + extern void Cec_ManSatAddToStore( Vec_Int_t * vCexStore, Vec_Int_t * vCex, int Out ); + Cbs0_Man_t * p; + Vec_Int_t * vCex, * vVisit, * vCexStore; + Vec_Str_t * vStatus; + Gia_Obj_t * pRoot; + int i, status, clk, clkTotal = clock(); + assert( Gia_ManRegNum(pAig) == 0 ); + // prepare AIG + Gia_ManCreateRefs( pAig ); + Gia_ManCleanMark0( pAig ); + Gia_ManCleanMark1( pAig ); + // create logic network + p = Cbs0_ManAlloc(); + p->Pars.nBTLimit = nConfs; + p->pAig = pAig; + // create resulting data-structures + vStatus = Vec_StrAlloc( Gia_ManPoNum(pAig) ); + vCexStore = Vec_IntAlloc( 10000 ); + vVisit = Vec_IntAlloc( 100 ); + vCex = Cbs0_ReadModel( p ); + // solve for each output + Gia_ManForEachCo( pAig, pRoot, i ) + { + Vec_IntClear( vCex ); + if ( Gia_ObjIsConst0(Gia_ObjFanin0(pRoot)) ) + { + if ( Gia_ObjFaninC0(pRoot) ) + { + printf( "Constant 1 output of SRM!!!\n" ); + Cec_ManSatAddToStore( vCexStore, vCex, i ); // trivial counter-example + Vec_StrPush( vStatus, 0 ); + } + else + { +// printf( "Constant 0 output of SRM!!!\n" ); + Vec_StrPush( vStatus, 1 ); + } + continue; + } + clk = clock(); + p->Pars.fUseHighest = 1; + p->Pars.fUseLowest = 0; + status = Cbs0_ManSolve( p, Gia_ObjChild0(pRoot) ); +/* + if ( status == -1 ) + { + p->Pars.fUseHighest = 0; + p->Pars.fUseLowest = 1; + status = Cbs0_ManSolve( p, Gia_ObjChild0(pRoot) ); + } +*/ + Vec_StrPush( vStatus, (char)status ); + if ( status == -1 ) + { + p->nSatUndec++; + p->nConfUndec += p->Pars.nBTThis; + Cec_ManSatAddToStore( vCexStore, NULL, i ); // timeout + p->timeSatUndec += clock() - clk; + continue; + } + if ( status == 1 ) + { + p->nSatUnsat++; + p->nConfUnsat += p->Pars.nBTThis; + p->timeSatUnsat += clock() - clk; + continue; + } + p->nSatSat++; + p->nConfSat += p->Pars.nBTThis; +// Gia_SatVerifyPattern( pAig, pRoot, vCex, vVisit ); + Cec_ManSatAddToStore( vCexStore, vCex, i ); + p->timeSatSat += clock() - clk; + } + Vec_IntFree( vVisit ); + p->nSatTotal = Gia_ManPoNum(pAig); + p->timeTotal = clock() - clkTotal; + if ( fVerbose ) + Cbs0_ManSatPrintStats( p ); + Cbs0_ManStop( p ); + *pvStatus = vStatus; +// printf( "Total number of cex literals = %d. (Ave = %d)\n", +// Vec_IntSize(vCexStore)-2*p->nSatUndec-2*p->nSatSat, +// (Vec_IntSize(vCexStore)-2*p->nSatUndec-2*p->nSatSat)/p->nSatSat ); + return vCexStore; +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + diff --git a/src/aig/gia/giaRetime.c b/src/aig/gia/giaRetime.c index 4f2c6e08..965b5981 100644 --- a/src/aig/gia/giaRetime.c +++ b/src/aig/gia/giaRetime.c @@ -243,6 +243,7 @@ Gia_Man_t * Gia_ManRetimeForwardOne( Gia_Man_t * p, int * pnRegFixed, int * pnRe // finally derive the new manager pNew = Gia_ManRetimeDupForward( p, vCut ); Vec_PtrFree( vCut ); + if ( vObjClasses ) Vec_IntFree( vObjClasses ); pNew->vFlopClasses = vFlopClasses; return pNew; diff --git a/src/aig/gia/giaSim.c b/src/aig/gia/giaSim.c index 7ee0ddc4..020683ad 100644 --- a/src/aig/gia/giaSim.c +++ b/src/aig/gia/giaSim.c @@ -405,7 +405,7 @@ int Gia_ManSimSimulate( Gia_Man_t * pAig, Gia_ParSim_t * pPars ) if ( pPars->fVerbose ) { printf( "Frame %4d out of %4d and timeout %3d sec. ", i+1, pPars->nIters, pPars->TimeLimit ); - printf( "Time = %7.2f sec\r", (1.0*clock()-clkTotal)/CLOCKS_PER_SEC ); + printf( "Time = %7.2f sec\r", (1.0*clock()-clk)/CLOCKS_PER_SEC ); } if ( pPars->fCheckMiter && Gia_ManCheckPos( p, &iOut, &iPat ) ) { diff --git a/src/aig/gia/module.make b/src/aig/gia/module.make index 055d7580..916414fc 100644 --- a/src/aig/gia/module.make +++ b/src/aig/gia/module.make @@ -2,6 +2,7 @@ SRC += src/aig/gia/gia.c \ src/aig/gia/giaAig.c \ src/aig/gia/giaAiger.c \ src/aig/gia/giaCof.c \ + src/aig/gia/giaCSatOld.c \ src/aig/gia/giaCSat.c \ src/aig/gia/giaDfs.c \ src/aig/gia/giaDup.c \ |