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author | Yen-Sheng Ho <ysho@berkeley.edu> | 2017-03-16 16:14:45 -0700 |
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committer | Yen-Sheng Ho <ysho@berkeley.edu> | 2017-03-16 16:14:45 -0700 |
commit | ddd349cf96875baa1194f5f3ba8dcc5304f99572 (patch) | |
tree | 47f51b3fa9dec721b64d3cd0391c189044670f90 /src | |
parent | b9971b2348cd8940cf74db7b3d6e0c7146db6af2 (diff) | |
download | abc-ddd349cf96875baa1194f5f3ba8dcc5304f99572.tar.gz abc-ddd349cf96875baa1194f5f3ba8dcc5304f99572.tar.bz2 abc-ddd349cf96875baa1194f5f3ba8dcc5304f99572.zip |
%pdra: created a new manager; refactored
Diffstat (limited to 'src')
-rw-r--r-- | src/base/wlc/wlcAbs.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/src/base/wlc/wlcAbs.c b/src/base/wlc/wlcAbs.c index 23e60b0d..d5a6ca91 100644 --- a/src/base/wlc/wlcAbs.c +++ b/src/base/wlc/wlcAbs.c @@ -45,6 +45,33 @@ struct Int_Pair_t_ int second; }; +typedef struct Wla_Man_t_ Wla_Man_t; +struct Wla_Man_t_ +{ + Pdr_Man_t * pPdr; + Pdr_Par_t * pPdrPars; + Vec_Vec_t * vClauses; + Vec_Int_t * vBlacks; + Aig_Man_t * pAig; + Abc_Cex_t * pCex; + Vec_Int_t * vPisNew; + Vec_Int_t * vRefine; + Gia_Man_t * pGia; + Wlc_Ntk_t * pAbs; + Wlc_Ntk_t * p; + Wlc_Par_t * pPars; + Vec_Bit_t * vUnmark; + + int nIters; + int nTotalCla; + int nDisj; + int nNDisj; + + abctime tPdr; + abctime tCbr; + abctime tPbr; +}; + int IntPairPtrCompare ( Int_Pair_t ** a, Int_Pair_t ** b ) { return (*a)->second < (*b)->second; @@ -1178,9 +1205,307 @@ Vec_Int_t * Wlc_NtkFlopsRemap( Wlc_Ntk_t * p, Vec_Int_t * vFfOld, Vec_Int_t * vF SeeAlso [] ***********************************************************************/ + +Wlc_Ntk_t * Wla_ManCreateAbs( Wla_Man_t * pWla ) +{ + // get abstracted GIA and the set of pseudo-PIs (vPisNew) + if ( pWla->vBlacks == NULL ) + pWla->vBlacks = Wlc_NtkGetBlacks( pWla->p, pWla->pPars ); + else + Wlc_NtkUpdateBlacks( pWla->p, pWla->pPars, &pWla->vBlacks, pWla->vUnmark ); + pWla->pAbs = Wlc_NtkAbs2( pWla->p, pWla->vBlacks, NULL ); + pWla->vPisNew = Vec_IntDup( pWla->vBlacks ); + + return pWla->pAbs; +} + +Aig_Man_t * Wla_ManBitBlast( Wla_Man_t * pWla ) +{ + int nDcFlops; + Gia_Man_t * pTemp; + + pWla->pGia = Wlc_NtkBitBlast( pWla->pAbs, NULL, -1, 0, 0, 0, 0 ); + + // if the abstraction has flops with DC-init state, + // new PIs were introduced by bit-blasting at the end of the PI list + // here we move these variables to be *before* PPIs, because + // PPIs are supposed to be at the end of the PI list for refinement + nDcFlops = Wlc_NtkDcFlopNum(pWla->pAbs); + if ( nDcFlops > 0 ) // DC-init flops are present + { + pWla->pGia = Gia_ManPermuteInputs( pTemp = pWla->pGia, Wlc_NtkCountObjBits(pWla->p, pWla->vPisNew), nDcFlops ); + Gia_ManStop( pTemp ); + } + // if the word-level outputs have to be XORs, this is a place to do it + if ( pWla->pPars->fXorOutput ) + { + pWla->pGia = Gia_ManTransformMiter2( pTemp = pWla->pGia ); + Gia_ManStop( pTemp ); + } + if ( pWla->pPars->fVerbose ) + { + printf( "Derived abstraction with %d objects and %d PPIs. Bit-blasted AIG stats are:\n", Wlc_NtkObjNum(pWla->pAbs), Vec_IntSize(pWla->vPisNew) ); + Gia_ManPrintStats( pWla->pGia, NULL ); + } + + // try to prove abstracted GIA by converting it to AIG and calling PDR + pWla->pAig = Gia_ManToAigSimple( pWla->pGia ); + + Wlc_NtkFree( pWla->pAbs ); + + return pWla->pAig; +} + +int Wla_ManSolve( Wla_Man_t * pWla ) +{ + abctime clk; + int RetValue = -1; + + if ( pWla->vClauses && pWla->pPars->fCheckCombUnsat ) + { + Pdr_Man_t * pPdr2; + + if ( Aig_ManAndNum( pWla->pAig ) <= 20000 ) + { + Aig_Man_t * pAigScorr; + Ssw_Pars_t ScorrPars, * pScorrPars = &ScorrPars; + int nAnds; + + clk = Abc_Clock(); + + Ssw_ManSetDefaultParams( pScorrPars ); + pScorrPars->fStopWhenGone = 1; + pScorrPars->nFramesK = 1; + pAigScorr = Ssw_SignalCorrespondence( pWla->pAig, pScorrPars ); + assert ( pAigScorr ); + nAnds = Aig_ManAndNum( pAigScorr); + Aig_ManStop( pAigScorr ); + + if ( nAnds == 0 ) + { + if ( pWla->pPars->fVerbose ) + Abc_PrintTime( 1, "SCORR proved UNSAT. Time", Abc_Clock() - clk ); + return 1; + } + else if ( pWla->pPars->fVerbose ) + { + Abc_Print( 1, "SCORR failed with %d ANDs. ", nAnds); + Abc_PrintTime( 1, "Time", Abc_Clock() - clk ); + } + } + + clk = Abc_Clock(); + + pWla->pPdrPars->fVerbose = 0; + pPdr2 = Pdr_ManStart( pWla->pAig, pWla->pPdrPars, NULL ); + RetValue = IPdr_ManCheckCombUnsat( pPdr2 ); + Pdr_ManStop( pPdr2 ); + pWla->pPdrPars->fVerbose = pWla->pPars->fPdrVerbose; + + pWla->tPdr += Abc_Clock() - clk; + + if ( RetValue == 1 ) + { + if ( pWla->pPars->fVerbose ) + Abc_PrintTime( 1, "ABS becomes combinationally UNSAT. Time", Abc_Clock() - clk ); + return 1; + } + + if ( pWla->pPars->fVerbose ) + Abc_PrintTime( 1, "Check comb. unsat failed. Time", Abc_Clock() - clk ); + } + + clk = Abc_Clock(); + pWla->pPdr = Pdr_ManStart( pWla->pAig, pWla->pPdrPars, NULL ); + if ( pWla->vClauses ) { + assert( Vec_VecSize( pWla->vClauses) >= 2 ); + IPdr_ManRestore( pWla->pPdr, pWla->vClauses, NULL ); + } + + if ( !pWla->vClauses || RetValue != 1 ) + RetValue = IPdr_ManSolveInt( pWla->pPdr, pWla->pPars->fCheckClauses, pWla->pPars->fPushClauses ); + pWla->pPdr->tTotal += Abc_Clock() - clk; + pWla->tPdr += pWla->pPdr->tTotal; + + pWla->pCex = pWla->pAig->pSeqModel; + pWla->pAig->pSeqModel = NULL; + + // consider outcomes + if ( pWla->pCex == NULL ) + { + assert( RetValue ); // proved or undecided + return RetValue; + } + + // verify CEX + if ( Wlc_NtkCexIsReal( pWla->p, pWla->pCex ) ) + return 0; + + return -1; +} + +void Wla_ManRefine( Wla_Man_t * pWla ) +{ + abctime clk; + int nNodes; + // perform refinement + if ( pWla->pPars->fHybrid || !pWla->pPars->fProofRefine ) + { + clk = Abc_Clock(); + pWla->vRefine = Wlc_NtkAbsRefinement( pWla->p, pWla->pGia, pWla->pCex, pWla->vPisNew ); + pWla->tCbr += Abc_Clock() - clk; + } + else // proof-based only + { + pWla->vRefine = Vec_IntDup( pWla->vPisNew ); + } + if ( pWla->pPars->fProofRefine ) + { + clk = Abc_Clock(); + Wlc_NtkProofRefine( pWla->p, pWla->pPars, pWla->pCex, pWla->vPisNew, &pWla->vRefine ); + pWla->tPbr += Abc_Clock() - clk; + } + + pWla->vClauses = IPdr_ManSaveClauses( pWla->pPdr, 0 ); + if ( pWla->vClauses && pWla->pPars->fVerbose ) + { + int i; + Vec_Ptr_t * vVec; + Vec_VecForEachLevel( pWla->vClauses, vVec, i ) + pWla->nTotalCla += Vec_PtrSize( vVec ); + } + + // update the set of objects to be un-abstracted + clk = Abc_Clock(); + if ( pWla->pPars->fMFFC ) + { + nNodes = Wlc_NtkRemoveFromAbstraction( pWla->p, pWla->vRefine, pWla->vUnmark ); + if ( pWla->pPars->fVerbose ) + printf( "Refinement of CEX in frame %d came up with %d un-abstacted PPIs, whose MFFCs include %d objects.\n", pWla->pCex->iFrame, Vec_IntSize(pWla->vRefine), nNodes ); + } + else + { + nNodes = Wlc_NtkUnmarkRefinement( pWla->p, pWla->vRefine, pWla->vUnmark ); + if ( pWla->pPars->fVerbose ) + printf( "Refinement of CEX in frame %d came up with %d un-abstacted PPIs.\n", pWla->pCex->iFrame, Vec_IntSize(pWla->vRefine) ); + + } + Wlc_NtkAbsAnalyzeRefine( pWla->p, pWla->vBlacks, pWla->vUnmark, &pWla->nDisj, &pWla->nNDisj ); + if ( pWla->pPars->fVerbose ) + Abc_Print( 1, "Refine analysis (total): %d disjoint PPIs and %d non-disjoint PPIs\n", pWla->nDisj, pWla->nNDisj ); + pWla->tCbr += Abc_Clock() - clk; + + Pdr_ManStop( pWla->pPdr ); pWla->pPdr = NULL; + Gia_ManStop( pWla->pGia ); pWla->pGia = NULL; + Vec_IntFree( pWla->vPisNew ); pWla->vPisNew = NULL; + Vec_IntFree( pWla->vRefine ); pWla->vRefine = NULL; + Abc_CexFree( pWla->pCex ); pWla->pCex = NULL; + Aig_ManStop( pWla->pAig ); pWla->pAig = NULL; +} + +Wla_Man_t * Wla_ManStart( Wlc_Ntk_t * pNtk, Wlc_Par_t * pPars ) +{ + Wla_Man_t * p = ABC_CALLOC( Wla_Man_t, 1 ); + Pdr_Par_t * pPdrPars; + p->p = pNtk; + p->pPars = pPars; + p->vUnmark = Vec_BitStart( Wlc_NtkObjNumMax(pNtk) ); + + pPdrPars = ABC_CALLOC( Pdr_Par_t, 1 ); + Pdr_ManSetDefaultParams( pPdrPars ); + pPdrPars->fVerbose = pPars->fPdrVerbose; + pPdrPars->fVeryVerbose = 0; + if ( pPars->fPdra ) + { + pPdrPars->fUseAbs = 1; // use 'pdr -t' (on-the-fly abstraction) + pPdrPars->fCtgs = 1; // use 'pdr -nc' (improved generalization) + pPdrPars->fSkipDown = 0; // use 'pdr -nc' (improved generalization) + pPdrPars->nRestLimit = 500; // reset queue or proof-obligations when it gets larger than this + } + p->pPdrPars = pPdrPars; + + p->nIters = 1; + p->nTotalCla = 0; + p->nDisj = 0; + p->nNDisj = 0; + + return p; +} + +void Wla_ManStop( Wla_Man_t * p ) +{ + if ( p->vBlacks ) Vec_IntFree( p->vBlacks ); + if ( p->pPdr ) Pdr_ManStop( p->pPdr ); + if ( p->pGia ) Gia_ManStop( p->pGia ); + if ( p->vPisNew ) Vec_IntFree( p->vPisNew ); + if ( p->vRefine ) Vec_IntFree( p->vRefine ); + if ( p->pCex ) Abc_CexFree( p->pCex ); + if ( p->pAig ) Aig_ManStop( p->pAig ); + Vec_BitFree( p->vUnmark ); + ABC_FREE( p->pPdrPars ); + ABC_FREE( p ); +} + int Wlc_NtkPdrAbs( Wlc_Ntk_t * p, Wlc_Par_t * pPars ) { abctime clk = Abc_Clock(); + abctime tTotal; + Wla_Man_t * pWla = NULL; + int RetValue = -1; + + pWla = Wla_ManStart( p, pPars ); + + // perform refinement iterations + for ( pWla->nIters = 1; pWla->nIters < pPars->nIterMax; ++pWla->nIters ) + { + if ( pPars->fVerbose ) + printf( "\nIteration %d:\n", pWla->nIters ); + + Wla_ManCreateAbs( pWla ); + Wla_ManBitBlast( pWla ); + + RetValue = Wla_ManSolve( pWla ); + + if ( RetValue != -1 ) + break; + + Wla_ManRefine( pWla ); + } + + // report the result + if ( pPars->fVerbose ) + printf( "\n" ); + printf( "Abstraction " ); + if ( RetValue == 0 ) + printf( "resulted in a real CEX" ); + else if ( RetValue == 1 ) + printf( "is successfully proved" ); + else + printf( "timed out" ); + printf( " after %d iterations. ", pWla->nIters ); + tTotal = Abc_Clock() - clk; + Abc_PrintTime( 1, "Time", tTotal ); + + if ( pPars->fVerbose ) + Abc_Print( 1, "PDRA reused %d clauses.\n", pWla->nTotalCla ); + if ( pPars->fVerbose ) + { + ABC_PRTP( "PDR ", pWla->tPdr, tTotal ); + ABC_PRTP( "CEX Refine ", pWla->tCbr, tTotal ); + ABC_PRTP( "Proof Refine ", pWla->tPbr, tTotal ); + ABC_PRTP( "Misc. ", tTotal - pWla->tPdr - pWla->tCbr - pWla->tPbr, tTotal ); + ABC_PRTP( "Total ", tTotal, tTotal ); + } + + Wla_ManStop( pWla ); + + return RetValue; +} + +/* +int Wlc_NtkPdrAbs2( Wlc_Ntk_t * p, Wlc_Par_t * pPars ) +{ + abctime clk = Abc_Clock(); abctime clk2; abctime tPdr = 0, tCbr = 0, tPbr = 0, tTotal = 0; Pdr_Man_t * pPdr; @@ -1476,6 +1801,7 @@ int Wlc_NtkPdrAbs( Wlc_Ntk_t * p, Wlc_Par_t * pPars ) return RetValue; } +*/ /**Function************************************************************* |