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-rw-r--r--src/aig/ssw_old/sswSim.c1334
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diff --git a/src/aig/ssw_old/sswSim.c b/src/aig/ssw_old/sswSim.c
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+++ b/src/aig/ssw_old/sswSim.c
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+/**CFile****************************************************************
+
+ FileName [sswSim.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [Inductive prover with constraints.]
+
+ Synopsis [Sequential simulator used by the inductive prover.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - September 1, 2008.]
+
+ Revision [$Id: sswSim.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "sswInt.h"
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+// simulation manager
+struct Ssw_Sml_t_
+{
+ Aig_Man_t * pAig; // the original AIG manager
+ int nPref; // the number of timeframes in the prefix
+ int nFrames; // the number of timeframes
+ int nWordsFrame; // the number of words in each timeframe
+ int nWordsTotal; // the total number of words at a node
+ int nWordsPref; // the number of word in the prefix
+ int fNonConstOut; // have seen a non-const-0 output during simulation
+ int nSimRounds; // statistics
+ int timeSim; // statistics
+ unsigned pData[0]; // simulation data for the nodes
+};
+
+static inline unsigned * Ssw_ObjSim( Ssw_Sml_t * p, int Id ) { return p->pData + p->nWordsTotal * Id; }
+static inline unsigned Ssw_ObjRandomSim() { return Aig_ManRandom(0); }
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Computes hash value of the node using its simulation info.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+unsigned Ssw_SmlObjHashWord( Ssw_Sml_t * p, Aig_Obj_t * pObj )
+{
+ static int s_SPrimes[128] = {
+ 1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459,
+ 1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997,
+ 2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543,
+ 2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089,
+ 3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671,
+ 3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243,
+ 4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871,
+ 4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471,
+ 5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073,
+ 6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689,
+ 6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309,
+ 7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933,
+ 8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147
+ };
+ unsigned * pSims;
+ unsigned uHash;
+ int i;
+ assert( p->nWordsTotal <= 128 );
+ uHash = 0;
+ pSims = Ssw_ObjSim(p, pObj->Id);
+ for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
+ uHash ^= pSims[i] * s_SPrimes[i & 0x7F];
+ return uHash;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if simulation info is composed of all zeros.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlObjIsConstWord( Ssw_Sml_t * p, Aig_Obj_t * pObj )
+{
+ unsigned * pSims;
+ int i;
+ pSims = Ssw_ObjSim(p, pObj->Id);
+ for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
+ if ( pSims[i] )
+ return 0;
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if simulation infos are equal.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlObjsAreEqualWord( Ssw_Sml_t * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 )
+{
+ unsigned * pSims0, * pSims1;
+ int i;
+ pSims0 = Ssw_ObjSim(p, pObj0->Id);
+ pSims1 = Ssw_ObjSim(p, pObj1->Id);
+ for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
+ if ( pSims0[i] != pSims1[i] )
+ return 0;
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if the node appears to be constant 1 candidate.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlObjIsConstBit( void * p, Aig_Obj_t * pObj )
+{
+ return pObj->fPhase == pObj->fMarkB;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if the nodes appear equal.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlObjsAreEqualBit( void * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 )
+{
+ return (pObj0->fPhase == pObj1->fPhase) == (pObj0->fMarkB == pObj1->fMarkB);
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Counts the number of 1s in the XOR of simulation data.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlNodeNotEquWeight( Ssw_Sml_t * p, int Left, int Right )
+{
+ unsigned * pSimL, * pSimR;
+ int k, Counter = 0;
+ pSimL = Ssw_ObjSim( p, Left );
+ pSimR = Ssw_ObjSim( p, Right );
+ for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
+ Counter += Aig_WordCountOnes( pSimL[k] ^ pSimR[k] );
+ return Counter;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if simulation info is composed of all zeros.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlNodeIsZero( Ssw_Sml_t * p, Aig_Obj_t * pObj )
+{
+ unsigned * pSims;
+ int i;
+ pSims = Ssw_ObjSim(p, pObj->Id);
+ for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
+ if ( pSims[i] )
+ return 0;
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Counts the number of one's in the patten of the output.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlNodeCountOnes( Ssw_Sml_t * p, Aig_Obj_t * pObj )
+{
+ unsigned * pSims;
+ int i, Counter = 0;
+ pSims = Ssw_ObjSim(p, pObj->Id);
+ for ( i = 0; i < p->nWordsTotal; i++ )
+ Counter += Aig_WordCountOnes( pSims[i] );
+ return Counter;
+}
+
+
+
+/**Function*************************************************************
+
+ Synopsis [Generated const 0 pattern.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlSavePattern0( Ssw_Man_t * p, int fInit )
+{
+ memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords );
+}
+
+/**Function*************************************************************
+
+ Synopsis [[Generated const 1 pattern.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlSavePattern1( Ssw_Man_t * p, int fInit )
+{
+ Aig_Obj_t * pObj;
+ int i, k, nTruePis;
+ memset( p->pPatWords, 0xff, sizeof(unsigned) * p->nPatWords );
+ if ( !fInit )
+ return;
+ // clear the state bits to correspond to all-0 initial state
+ nTruePis = Saig_ManPiNum(p->pAig);
+ k = 0;
+ Saig_ManForEachLo( p->pAig, pObj, i )
+ Aig_InfoXorBit( p->pPatWords, nTruePis * p->nFrames + k++ );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Copy pattern from the solver into the internal storage.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlSavePattern( Ssw_Man_t * p )
+{
+ Aig_Obj_t * pObj;
+ int i;
+ memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords );
+ Aig_ManForEachPi( p->pFrames, pObj, i )
+ if ( p->pSat->model.ptr[Ssw_ObjSatNum(p, pObj)] == l_True )
+ Aig_InfoSetBit( p->pPatWords, i );
+/*
+ if ( p->vCex )
+ {
+ Vec_IntClear( p->vCex );
+ for ( i = 0; i < Saig_ManPiNum(p->pAig); i++ )
+ Vec_IntPush( p->vCex, Aig_InfoHasBit( p->pPatWords, i ) );
+ for ( i = Saig_ManPiNum(p->pFrames); i < Aig_ManPiNum(p->pFrames); i++ )
+ Vec_IntPush( p->vCex, Aig_InfoHasBit( p->pPatWords, i ) );
+ }
+*/
+
+/*
+ printf( "Pattern: " );
+ Aig_ManForEachPi( p->pFrames, pObj, i )
+ printf( "%d", Aig_InfoHasBit( p->pPatWords, i ) );
+ printf( "\n" );
+*/
+}
+
+
+
+/**Function*************************************************************
+
+ Synopsis [Creates the counter-example from the successful pattern.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int * Ssw_SmlCheckOutputSavePattern( Ssw_Sml_t * p, Aig_Obj_t * pObjPo )
+{
+ Aig_Obj_t * pFanin, * pObjPi;
+ unsigned * pSims;
+ int i, k, BestPat, * pModel;
+ // find the word of the pattern
+ pFanin = Aig_ObjFanin0(pObjPo);
+ pSims = Ssw_ObjSim(p, pFanin->Id);
+ for ( i = 0; i < p->nWordsTotal; i++ )
+ if ( pSims[i] )
+ break;
+ assert( i < p->nWordsTotal );
+ // find the bit of the pattern
+ for ( k = 0; k < 32; k++ )
+ if ( pSims[i] & (1 << k) )
+ break;
+ assert( k < 32 );
+ // determine the best pattern
+ BestPat = i * 32 + k;
+ // fill in the counter-example data
+ pModel = ALLOC( int, Aig_ManPiNum(p->pAig)+1 );
+ Aig_ManForEachPi( p->pAig, pObjPi, i )
+ {
+ pModel[i] = Aig_InfoHasBit(Ssw_ObjSim(p, pObjPi->Id), BestPat);
+// printf( "%d", pModel[i] );
+ }
+ pModel[Aig_ManPiNum(p->pAig)] = pObjPo->Id;
+// printf( "\n" );
+ return pModel;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Returns 1 if the one of the output is already non-constant 0.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int * Ssw_SmlCheckOutput( Ssw_Sml_t * p )
+{
+ Aig_Obj_t * pObj;
+ int i;
+ // make sure the reference simulation pattern does not detect the bug
+ pObj = Aig_ManPo( p->pAig, 0 );
+ assert( Aig_ObjFanin0(pObj)->fPhase == (unsigned)Aig_ObjFaninC0(pObj) );
+ Aig_ManForEachPo( p->pAig, pObj, i )
+ {
+ if ( !Ssw_SmlObjIsConstWord( p, Aig_ObjFanin0(pObj) ) )
+ {
+ // create the counter-example from this pattern
+ return Ssw_SmlCheckOutputSavePattern( p, pObj );
+ }
+ }
+ return NULL;
+}
+
+
+
+/**Function*************************************************************
+
+ Synopsis [Assigns random patterns to the PI node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlAssignRandom( Ssw_Sml_t * p, Aig_Obj_t * pObj )
+{
+ unsigned * pSims;
+ int i;
+ assert( Aig_ObjIsPi(pObj) );
+ pSims = Ssw_ObjSim( p, pObj->Id );
+ for ( i = 0; i < p->nWordsTotal; i++ )
+ pSims[i] = Ssw_ObjRandomSim();
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assigns random patterns to the PI node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlAssignRandomFrame( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
+{
+ unsigned * pSims;
+ int i;
+ assert( Aig_ObjIsPi(pObj) );
+ pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = Ssw_ObjRandomSim();
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assigns constant patterns to the PI node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlObjAssignConst( Ssw_Sml_t * p, Aig_Obj_t * pObj, int fConst1, int iFrame )
+{
+ unsigned * pSims;
+ int i;
+ assert( Aig_ObjIsPi(pObj) );
+ pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = fConst1? ~(unsigned)0 : 0;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assigns constant patterns to the PI node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+unsigned Ssw_SmlObjGetWord( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iWord, int iFrame )
+{
+ unsigned * pSims;
+// assert( Aig_ObjIsPi(pObj) );
+ pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
+ return pSims[iWord];
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assigns constant patterns to the PI node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlObjSetWord( Ssw_Sml_t * p, Aig_Obj_t * pObj, unsigned Word, int iWord, int iFrame )
+{
+ unsigned * pSims;
+ assert( Aig_ObjIsPi(pObj) );
+ pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
+ pSims[iWord] = Word;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assings random simulation info for the PIs.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlInitialize( Ssw_Sml_t * p, int fInit )
+{
+ Aig_Obj_t * pObj;
+ int i;
+ if ( fInit )
+ {
+ assert( Aig_ManRegNum(p->pAig) > 0 );
+ assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) );
+ // assign random info for primary inputs
+ Saig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlAssignRandom( p, pObj );
+ // assign the initial state for the latches
+ Saig_ManForEachLo( p->pAig, pObj, i )
+ Ssw_SmlObjAssignConst( p, pObj, 0, 0 );
+ }
+ else
+ {
+ Aig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlAssignRandom( p, pObj );
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assings distance-1 simulation info for the PIs.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlAssignDist1( Ssw_Sml_t * p, unsigned * pPat )
+{
+ Aig_Obj_t * pObj;
+ int f, i, k, Limit, nTruePis;
+ assert( p->nFrames > 0 );
+ if ( p->nFrames == 1 )
+ {
+ // copy the PI info
+ Aig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlObjAssignConst( p, pObj, Aig_InfoHasBit(pPat, i), 0 );
+ // flip one bit
+ Limit = AIG_MIN( Aig_ManPiNum(p->pAig), p->nWordsTotal * 32 - 1 );
+ for ( i = 0; i < Limit; i++ )
+ Aig_InfoXorBit( Ssw_ObjSim( p, Aig_ManPi(p->pAig,i)->Id ), i+1 );
+ }
+ else
+ {
+ int fUseDist1 = 0;
+
+ // copy the PI info for each frame
+ nTruePis = Aig_ManPiNum(p->pAig) - Aig_ManRegNum(p->pAig);
+ for ( f = 0; f < p->nFrames; f++ )
+ Saig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlObjAssignConst( p, pObj, Aig_InfoHasBit(pPat, nTruePis * f + i), f );
+ // copy the latch info
+ k = 0;
+ Saig_ManForEachLo( p->pAig, pObj, i )
+ Ssw_SmlObjAssignConst( p, pObj, Aig_InfoHasBit(pPat, nTruePis * p->nFrames + k++), 0 );
+// assert( p->pFrames == NULL || nTruePis * p->nFrames + k == Aig_ManPiNum(p->pFrames) );
+
+ // flip one bit of the last frame
+ if ( fUseDist1 ) //&& p->nFrames == 2 )
+ {
+ Limit = AIG_MIN( nTruePis, p->nWordsFrame * 32 - 1 );
+ for ( i = 0; i < Limit; i++ )
+ Aig_InfoXorBit( Ssw_ObjSim( p, Aig_ManPi(p->pAig, i)->Id ) + p->nWordsFrame*(p->nFrames-1), i+1 );
+ }
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Assings distance-1 simulation info for the PIs.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlAssignDist1Plus( Ssw_Sml_t * p, unsigned * pPat )
+{
+ Aig_Obj_t * pObj;
+ int f, i, Limit;
+ assert( p->nFrames > 0 );
+
+ // copy the pattern into the primary inputs
+ Aig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlObjAssignConst( p, pObj, Aig_InfoHasBit(pPat, i), 0 );
+/*
+ // set distance one PIs for the first frame
+ Limit = AIG_MIN( Saig_ManPiNum(p->pAig), p->nWordsFrame * 32 - 1 );
+ for ( i = 0; i < Limit; i++ )
+ Aig_InfoXorBit( Ssw_ObjSim( p, Aig_ManPi(p->pAig, i)->Id ), i+1 );
+*/
+ // create random info for the remaining timeframes
+ for ( f = 1; f < p->nFrames; f++ )
+ Saig_ManForEachPi( p->pAig, pObj, i )
+ Ssw_SmlAssignRandomFrame( p, pObj, f );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates one node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlNodeSimulate( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
+{
+ unsigned * pSims, * pSims0, * pSims1;
+ int fCompl, fCompl0, fCompl1, i;
+ assert( !Aig_IsComplement(pObj) );
+ assert( Aig_ObjIsNode(pObj) );
+ assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
+ // get hold of the simulation information
+ pSims = Ssw_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame;
+ pSims0 = Ssw_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame;
+ pSims1 = Ssw_ObjSim(p, Aig_ObjFanin1(pObj)->Id) + p->nWordsFrame * iFrame;
+ // get complemented attributes of the children using their random info
+ fCompl = pObj->fPhase;
+ fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj));
+ fCompl1 = Aig_ObjPhaseReal(Aig_ObjChild1(pObj));
+ // simulate
+ if ( fCompl0 && fCompl1 )
+ {
+ if ( fCompl )
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (pSims0[i] | pSims1[i]);
+ else
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = ~(pSims0[i] | pSims1[i]);
+ }
+ else if ( fCompl0 && !fCompl1 )
+ {
+ if ( fCompl )
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (pSims0[i] | ~pSims1[i]);
+ else
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (~pSims0[i] & pSims1[i]);
+ }
+ else if ( !fCompl0 && fCompl1 )
+ {
+ if ( fCompl )
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (~pSims0[i] | pSims1[i]);
+ else
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (pSims0[i] & ~pSims1[i]);
+ }
+ else // if ( !fCompl0 && !fCompl1 )
+ {
+ if ( fCompl )
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = ~(pSims0[i] & pSims1[i]);
+ else
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = (pSims0[i] & pSims1[i]);
+ }
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates one node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlNodesCompareInFrame( Ssw_Sml_t * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1, int iFrame0, int iFrame1 )
+{
+ unsigned * pSims0, * pSims1;
+ int i;
+ assert( !Aig_IsComplement(pObj0) );
+ assert( !Aig_IsComplement(pObj1) );
+ assert( iFrame0 == 0 || p->nWordsFrame < p->nWordsTotal );
+ assert( iFrame1 == 0 || p->nWordsFrame < p->nWordsTotal );
+ // get hold of the simulation information
+ pSims0 = Ssw_ObjSim(p, pObj0->Id) + p->nWordsFrame * iFrame0;
+ pSims1 = Ssw_ObjSim(p, pObj1->Id) + p->nWordsFrame * iFrame1;
+ // compare
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ if ( pSims0[i] != pSims1[i] )
+ return 0;
+ return 1;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates one node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlNodeCopyFanin( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
+{
+ unsigned * pSims, * pSims0;
+ int fCompl, fCompl0, i;
+ assert( !Aig_IsComplement(pObj) );
+ assert( Aig_ObjIsPo(pObj) );
+ assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
+ // get hold of the simulation information
+ pSims = Ssw_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame;
+ pSims0 = Ssw_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame;
+ // get complemented attributes of the children using their random info
+ fCompl = pObj->fPhase;
+ fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj));
+ // copy information as it is
+ if ( fCompl0 )
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = ~pSims0[i];
+ else
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims[i] = pSims0[i];
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates one node.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlNodeTransferNext( Ssw_Sml_t * p, Aig_Obj_t * pOut, Aig_Obj_t * pIn, int iFrame )
+{
+ unsigned * pSims0, * pSims1;
+ int i;
+ assert( !Aig_IsComplement(pOut) );
+ assert( !Aig_IsComplement(pIn) );
+ assert( Aig_ObjIsPo(pOut) );
+ assert( Aig_ObjIsPi(pIn) );
+ assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
+ // get hold of the simulation information
+ pSims0 = Ssw_ObjSim(p, pOut->Id) + p->nWordsFrame * iFrame;
+ pSims1 = Ssw_ObjSim(p, pIn->Id) + p->nWordsFrame * (iFrame+1);
+ // copy information as it is
+ for ( i = 0; i < p->nWordsFrame; i++ )
+ pSims1[i] = pSims0[i];
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Check if any of the POs becomes non-constant.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlCheckNonConstOutputs( Ssw_Sml_t * p )
+{
+ Aig_Obj_t * pObj;
+ int i;
+ Saig_ManForEachPo( p->pAig, pObj, i )
+ if ( !Ssw_SmlNodeIsZero(p, pObj) )
+ return 1;
+ return 0;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates AIG manager.]
+
+ Description [Assumes that the PI simulation info is attached.]
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlSimulateOne( Ssw_Sml_t * p )
+{
+ Aig_Obj_t * pObj, * pObjLi, * pObjLo;
+ int f, i, clk;
+clk = clock();
+ for ( f = 0; f < p->nFrames; f++ )
+ {
+ // simulate the nodes
+ Aig_ManForEachNode( p->pAig, pObj, i )
+ Ssw_SmlNodeSimulate( p, pObj, f );
+ // copy simulation info into outputs
+ Saig_ManForEachPo( p->pAig, pObj, i )
+ Ssw_SmlNodeCopyFanin( p, pObj, f );
+ // quit if this is the last timeframe
+ if ( f == p->nFrames - 1 )
+ break;
+ // copy simulation info into outputs
+ Saig_ManForEachLi( p->pAig, pObj, i )
+ Ssw_SmlNodeCopyFanin( p, pObj, f );
+ // copy simulation info into the inputs
+ Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
+ Ssw_SmlNodeTransferNext( p, pObjLi, pObjLo, f );
+ }
+p->timeSim += clock() - clk;
+p->nSimRounds++;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Simulates AIG manager.]
+
+ Description [Assumes that the PI simulation info is attached.]
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlSimulateOneFrame( Ssw_Sml_t * p )
+{
+ Aig_Obj_t * pObj, * pObjLi, * pObjLo;
+ int i, clk;
+clk = clock();
+ // simulate the nodes
+ Aig_ManForEachNode( p->pAig, pObj, i )
+ Ssw_SmlNodeSimulate( p, pObj, 0 );
+ // copy simulation info into outputs
+ Saig_ManForEachLi( p->pAig, pObj, i )
+ Ssw_SmlNodeCopyFanin( p, pObj, 0 );
+ // copy simulation info into the inputs
+ Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
+ Ssw_SmlNodeTransferNext( p, pObjLi, pObjLo, 0 );
+p->timeSim += clock() - clk;
+p->nSimRounds++;
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Allocates simulation manager.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Sml_t * Ssw_SmlStart( Aig_Man_t * pAig, int nPref, int nFrames, int nWordsFrame )
+{
+ Ssw_Sml_t * p;
+ p = (Ssw_Sml_t *)malloc( sizeof(Ssw_Sml_t) + sizeof(unsigned) * Aig_ManObjNumMax(pAig) * (nPref + nFrames) * nWordsFrame );
+ memset( p, 0, sizeof(Ssw_Sml_t) + sizeof(unsigned) * (nPref + nFrames) * nWordsFrame );
+ p->pAig = pAig;
+ p->nPref = nPref;
+ p->nFrames = nPref + nFrames;
+ p->nWordsFrame = nWordsFrame;
+ p->nWordsTotal = (nPref + nFrames) * nWordsFrame;
+ p->nWordsPref = nPref * nWordsFrame;
+ return p;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Allocates simulation manager.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlClean( Ssw_Sml_t * p )
+{
+ memset( p->pData, 0, sizeof(unsigned) * Aig_ManObjNumMax(p->pAig) * p->nWordsTotal );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Deallocates simulation manager.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlStop( Ssw_Sml_t * p )
+{
+ free( p );
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Performs simulation of the uninitialized circuit.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Sml_t * Ssw_SmlSimulateComb( Aig_Man_t * pAig, int nWords )
+{
+ Ssw_Sml_t * p;
+ p = Ssw_SmlStart( pAig, 0, 1, nWords );
+ Ssw_SmlInitialize( p, 0 );
+ Ssw_SmlSimulateOne( p );
+ return p;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Performs simulation of the initialized circuit.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Sml_t * Ssw_SmlSimulateSeq( Aig_Man_t * pAig, int nPref, int nFrames, int nWords )
+{
+ Ssw_Sml_t * p;
+ p = Ssw_SmlStart( pAig, nPref, nFrames, nWords );
+ Ssw_SmlInitialize( p, 1 );
+ Ssw_SmlSimulateOne( p );
+ p->fNonConstOut = Ssw_SmlCheckNonConstOutputs( p );
+ return p;
+}
+
+
+
+/**Function*************************************************************
+
+ Synopsis [Allocates a counter-example.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Cex_t * Ssw_SmlAllocCounterExample( int nRegs, int nRealPis, int nFrames )
+{
+ Ssw_Cex_t * pCex;
+ int nWords = Aig_BitWordNum( nRegs + nRealPis * nFrames );
+ pCex = (Ssw_Cex_t *)malloc( sizeof(Ssw_Cex_t) + sizeof(unsigned) * nWords );
+ memset( pCex, 0, sizeof(Ssw_Cex_t) + sizeof(unsigned) * nWords );
+ pCex->nRegs = nRegs;
+ pCex->nPis = nRealPis;
+ pCex->nBits = nRegs + nRealPis * nFrames;
+ return pCex;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Frees the counter-example.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Ssw_SmlFreeCounterExample( Ssw_Cex_t * pCex )
+{
+ free( pCex );
+}
+
+/**Function*************************************************************
+
+ Synopsis [Resimulates the counter-example.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlRunCounterExample( Aig_Man_t * pAig, Ssw_Cex_t * p )
+{
+ Ssw_Sml_t * pSml;
+ Aig_Obj_t * pObj;
+ int RetValue, i, k, iBit;
+ assert( Aig_ManRegNum(pAig) > 0 );
+ assert( Aig_ManRegNum(pAig) < Aig_ManPiNum(pAig) );
+ // start a new sequential simulator
+ pSml = Ssw_SmlStart( pAig, 0, p->iFrame+1, 1 );
+ // assign simulation info for the registers
+ iBit = 0;
+ Saig_ManForEachLo( pAig, pObj, i )
+ Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), 0 );
+ // assign simulation info for the primary inputs
+ for ( i = 0; i <= p->iFrame; i++ )
+ Saig_ManForEachPi( pAig, pObj, k )
+ Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), i );
+ assert( iBit == p->nBits );
+ // run random simulation
+ Ssw_SmlSimulateOne( pSml );
+ // check if the given output has failed
+ RetValue = !Ssw_SmlNodeIsZero( pSml, Aig_ManPo(pAig, p->iPo) );
+ Ssw_SmlStop( pSml );
+ return RetValue;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Resimulates the counter-example.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlFindOutputCounterExample( Aig_Man_t * pAig, Ssw_Cex_t * p )
+{
+ Ssw_Sml_t * pSml;
+ Aig_Obj_t * pObj;
+ int i, k, iBit, iOut;
+ assert( Aig_ManRegNum(pAig) > 0 );
+ assert( Aig_ManRegNum(pAig) < Aig_ManPiNum(pAig) );
+ // start a new sequential simulator
+ pSml = Ssw_SmlStart( pAig, 0, p->iFrame+1, 1 );
+ // assign simulation info for the registers
+ iBit = 0;
+ Saig_ManForEachLo( pAig, pObj, i )
+ Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), 0 );
+ // assign simulation info for the primary inputs
+ for ( i = 0; i <= p->iFrame; i++ )
+ Saig_ManForEachPi( pAig, pObj, k )
+ Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), i );
+ assert( iBit == p->nBits );
+ // run random simulation
+ Ssw_SmlSimulateOne( pSml );
+ // check if the given output has failed
+ iOut = -1;
+ Saig_ManForEachPo( pAig, pObj, k )
+ if ( !Ssw_SmlNodeIsZero( pSml, Aig_ManPo(pAig, k) ) )
+ {
+ iOut = k;
+ break;
+ }
+ Ssw_SmlStop( pSml );
+ return iOut;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Creates sequential counter-example from the simulation info.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Cex_t * Ssw_SmlGetCounterExample( Ssw_Sml_t * p )
+{
+ Ssw_Cex_t * pCex;
+ Aig_Obj_t * pObj;
+ unsigned * pSims;
+ int iPo, iFrame, iBit, i, k;
+
+ // make sure the simulation manager has it
+ assert( p->fNonConstOut );
+
+ // find the first output that failed
+ iPo = -1;
+ iBit = -1;
+ iFrame = -1;
+ Saig_ManForEachPo( p->pAig, pObj, iPo )
+ {
+ if ( Ssw_SmlNodeIsZero(p, pObj) )
+ continue;
+ pSims = Ssw_ObjSim( p, pObj->Id );
+ for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
+ if ( pSims[i] )
+ {
+ iFrame = i / p->nWordsFrame;
+ iBit = 32 * (i % p->nWordsFrame) + Aig_WordFindFirstBit( pSims[i] );
+ break;
+ }
+ break;
+ }
+ assert( iPo < Aig_ManPoNum(p->pAig)-Aig_ManRegNum(p->pAig) );
+ assert( iFrame < p->nFrames );
+ assert( iBit < 32 * p->nWordsFrame );
+
+ // allocate the counter example
+ pCex = Ssw_SmlAllocCounterExample( Aig_ManRegNum(p->pAig), Aig_ManPiNum(p->pAig) - Aig_ManRegNum(p->pAig), iFrame + 1 );
+ pCex->iPo = iPo;
+ pCex->iFrame = iFrame;
+
+ // copy the bit data
+ Saig_ManForEachLo( p->pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim( p, pObj->Id );
+ if ( Aig_InfoHasBit( pSims, iBit ) )
+ Aig_InfoSetBit( pCex->pData, k );
+ }
+ for ( i = 0; i <= iFrame; i++ )
+ {
+ Saig_ManForEachPi( p->pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim( p, pObj->Id );
+ if ( Aig_InfoHasBit( pSims, 32 * p->nWordsFrame * i + iBit ) )
+ Aig_InfoSetBit( pCex->pData, pCex->nRegs + pCex->nPis * i + k );
+ }
+ }
+ // verify the counter example
+ if ( !Ssw_SmlRunCounterExample( p->pAig, pCex ) )
+ {
+ printf( "Ssw_SmlGetCounterExample(): Counter-example is invalid.\n" );
+ Ssw_SmlFreeCounterExample( pCex );
+ pCex = NULL;
+ }
+ return pCex;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Generates seq counter-example from the combinational one.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Cex_t * Ssw_SmlCopyCounterExample( Aig_Man_t * pAig, Aig_Man_t * pFrames, int * pModel )
+{
+ Ssw_Cex_t * pCex;
+ Aig_Obj_t * pObj;
+ int i, nFrames, nTruePis, nTruePos, iPo, iFrame;
+ // get the number of frames
+ assert( Aig_ManRegNum(pAig) > 0 );
+ assert( Aig_ManRegNum(pFrames) == 0 );
+ nTruePis = Aig_ManPiNum(pAig)-Aig_ManRegNum(pAig);
+ nTruePos = Aig_ManPoNum(pAig)-Aig_ManRegNum(pAig);
+ nFrames = Aig_ManPiNum(pFrames) / nTruePis;
+ assert( nTruePis * nFrames == Aig_ManPiNum(pFrames) );
+ assert( nTruePos * nFrames == Aig_ManPoNum(pFrames) );
+ // find the PO that failed
+ iPo = -1;
+ iFrame = -1;
+ Aig_ManForEachPo( pFrames, pObj, i )
+ if ( pObj->Id == pModel[Aig_ManPiNum(pFrames)] )
+ {
+ iPo = i % nTruePos;
+ iFrame = i / nTruePos;
+ break;
+ }
+ assert( iPo >= 0 );
+ // allocate the counter example
+ pCex = Ssw_SmlAllocCounterExample( Aig_ManRegNum(pAig), nTruePis, iFrame + 1 );
+ pCex->iPo = iPo;
+ pCex->iFrame = iFrame;
+
+ // copy the bit data
+ for ( i = 0; i < Aig_ManPiNum(pFrames); i++ )
+ {
+ if ( pModel[i] )
+ Aig_InfoSetBit( pCex->pData, pCex->nRegs + i );
+ if ( pCex->nRegs + i == pCex->nBits - 1 )
+ break;
+ }
+
+ // verify the counter example
+ if ( !Ssw_SmlRunCounterExample( pAig, pCex ) )
+ {
+ printf( "Ssw_SmlGetCounterExample(): Counter-example is invalid.\n" );
+ Ssw_SmlFreeCounterExample( pCex );
+ pCex = NULL;
+ }
+ return pCex;
+
+}
+
+/**Function*************************************************************
+
+ Synopsis [Make the trivial counter-example for the trivially asserted output.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Cex_t * Ssw_SmlTrivCounterExample( Aig_Man_t * pAig, int iFrameOut )
+{
+ Ssw_Cex_t * pCex;
+ int nTruePis, nTruePos, iPo, iFrame;
+ assert( Aig_ManRegNum(pAig) > 0 );
+ nTruePis = Aig_ManPiNum(pAig)-Aig_ManRegNum(pAig);
+ nTruePos = Aig_ManPoNum(pAig)-Aig_ManRegNum(pAig);
+ iPo = iFrameOut % nTruePos;
+ iFrame = iFrameOut / nTruePos;
+ // allocate the counter example
+ pCex = Ssw_SmlAllocCounterExample( Aig_ManRegNum(pAig), nTruePis, iFrame + 1 );
+ pCex->iPo = iPo;
+ pCex->iFrame = iFrame;
+ return pCex;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Make the trivial counter-example for the trivially asserted output.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+Ssw_Cex_t * Ssw_SmlDupCounterExample( Ssw_Cex_t * p, int nRegsNew )
+{
+ Ssw_Cex_t * pCex;
+ int i;
+ pCex = Ssw_SmlAllocCounterExample( nRegsNew, p->nPis, p->iFrame+1 );
+ pCex->iPo = p->iPo;
+ pCex->iFrame = p->iFrame;
+ for ( i = p->nRegs; i < p->nBits; i++ )
+ if ( Aig_InfoHasBit(p->pData, i) )
+ Aig_InfoSetBit( pCex->pData, pCex->nRegs + i - p->nRegs );
+ return pCex;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Resimulates the counter-example.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+int Ssw_SmlWriteCounterExample( FILE * pFile, Aig_Man_t * pAig, Ssw_Cex_t * p )
+{
+ Ssw_Sml_t * pSml;
+ Aig_Obj_t * pObj;
+ int RetValue, i, k, iBit;
+ unsigned * pSims;
+ assert( Aig_ManRegNum(pAig) > 0 );
+ assert( Aig_ManRegNum(pAig) < Aig_ManPiNum(pAig) );
+ // start a new sequential simulator
+ pSml = Ssw_SmlStart( pAig, 0, p->iFrame+1, 1 );
+ // assign simulation info for the registers
+ iBit = 0;
+ Saig_ManForEachLo( pAig, pObj, i )
+// Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), 0 );
+ Ssw_SmlObjAssignConst( pSml, pObj, 0, 0 );
+ // assign simulation info for the primary inputs
+ iBit = p->nRegs;
+ for ( i = 0; i <= p->iFrame; i++ )
+ Saig_ManForEachPi( pAig, pObj, k )
+ Ssw_SmlObjAssignConst( pSml, pObj, Aig_InfoHasBit(p->pData, iBit++), i );
+ assert( iBit == p->nBits );
+ // run random simulation
+ Ssw_SmlSimulateOne( pSml );
+ // check if the given output has failed
+ RetValue = !Ssw_SmlNodeIsZero( pSml, Aig_ManPo(pAig, p->iPo) );
+
+ // write the output file
+ for ( i = 0; i <= p->iFrame; i++ )
+ {
+/*
+ Saig_ManForEachLo( pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim(pSml, pObj->Id);
+ fprintf( pFile, "%d", (int)(pSims[i] != 0) );
+ }
+ fprintf( pFile, " " );
+*/
+ Saig_ManForEachPi( pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim(pSml, pObj->Id);
+ fprintf( pFile, "%d", (int)(pSims[i] != 0) );
+ }
+/*
+ fprintf( pFile, " " );
+ Saig_ManForEachPo( pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim(pSml, pObj->Id);
+ fprintf( pFile, "%d", (int)(pSims[i] != 0) );
+ }
+ fprintf( pFile, " " );
+ Saig_ManForEachLi( pAig, pObj, k )
+ {
+ pSims = Ssw_ObjSim(pSml, pObj->Id);
+ fprintf( pFile, "%d", (int)(pSims[i] != 0) );
+ }
+*/
+ fprintf( pFile, "\n" );
+ }
+
+ Ssw_SmlStop( pSml );
+ return RetValue;
+}
+
+
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 19:56:07 +0000