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|
/**CFile****************************************************************
FileName [giaAbs.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Scalable AIG package.]
Synopsis [Counter-example-guided abstraction refinement.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: giaAbs.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "gia.h"
#include "giaAig.h"
#include "giaAbs.h"
#include "saig.h"
#ifndef _WIN32
#include <unistd.h>
#endif
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern Vec_Int_t * Saig_ManProofAbstractionFlops( Aig_Man_t * p, Gia_ParAbs_t * pPars );
extern Vec_Int_t * Saig_ManCexAbstractionFlops( Aig_Man_t * p, Gia_ParAbs_t * pPars );
extern int Saig_ManCexRefineStep( Aig_Man_t * p, Vec_Int_t * vFlops, Abc_Cex_t * pCex, int fTryFour, int fSensePath, int fVerbose );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [This procedure sets default parameters.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManAbsSetDefaultParams( Gia_ParAbs_t * p )
{
memset( p, 0, sizeof(Gia_ParAbs_t) );
p->Algo = 0; // algorithm: CBA
p->nFramesMax = 10; // timeframes for PBA
p->nConfMax = 10000; // conflicts for PBA
p->fDynamic = 1; // dynamic unfolding for PBA
p->fConstr = 0; // use constraints
p->nFramesBmc = 250; // timeframes for BMC
p->nConfMaxBmc = 5000; // conflicts for BMC
p->nStableMax = 1000000; // the number of stable frames to quit
p->nRatio = 10; // ratio of flops to quit
p->nBobPar = 1000000; // the number of frames before trying to quit
p->fUseBdds = 0; // use BDDs to refine abstraction
p->fUseDprove = 0; // use 'dprove' to refine abstraction
p->fUseStart = 1; // use starting frame
p->fVerbose = 0; // verbose output
p->fVeryVerbose= 0; // printing additional information
p->Status = -1; // the problem status
p->nFramesDone = -1; // the number of rames covered
}
/**Function*************************************************************
Synopsis [Transform flop list into flop map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManFlops2Classes( Gia_Man_t * pGia, Vec_Int_t * vFlops )
{
Vec_Int_t * vFlopClasses;
int i, Entry;
vFlopClasses = Vec_IntStart( Gia_ManRegNum(pGia) );
Vec_IntForEachEntry( vFlops, Entry, i )
Vec_IntWriteEntry( vFlopClasses, Entry, 1 );
return vFlopClasses;
}
/**Function*************************************************************
Synopsis [Transform flop map into flop list.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManClasses2Flops( Vec_Int_t * vFlopClasses )
{
Vec_Int_t * vFlops;
int i, Entry;
vFlops = Vec_IntAlloc( 100 );
Vec_IntForEachEntry( vFlopClasses, Entry, i )
if ( Entry )
Vec_IntPush( vFlops, i );
return vFlops;
}
/**Function*************************************************************
Synopsis [Performs abstraction on the AIG manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManCexAbstraction( Gia_Man_t * p, Vec_Int_t * vFlops )
{
Gia_Man_t * pGia;
Aig_Man_t * pNew, * pTemp;
pNew = Gia_ManToAig( p, 0 );
pNew = Saig_ManDeriveAbstraction( pTemp = pNew, vFlops );
Aig_ManStop( pTemp );
pGia = Gia_ManFromAig( pNew );
// pGia->vCiNumsOrig = pNew->vCiNumsOrig;
// pNew->vCiNumsOrig = NULL;
Aig_ManStop( pNew );
return pGia;
}
/**Function*************************************************************
Synopsis [Computes abstracted flops for the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManCexAbstractionFlops( Gia_Man_t * p, Gia_ParAbs_t * pPars )
{
Vec_Int_t * vFlops;
Aig_Man_t * pNew;
pNew = Gia_ManToAig( p, 0 );
vFlops = Saig_ManCexAbstractionFlops( pNew, pPars );
p->pCexSeq = pNew->pSeqModel; pNew->pSeqModel = NULL;
Aig_ManStop( pNew );
return vFlops;
}
/**Function*************************************************************
Synopsis [Computes abstracted flops for the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManProofAbstractionFlops( Gia_Man_t * p, Gia_ParAbs_t * pPars )
{
Vec_Int_t * vFlops;
Aig_Man_t * pNew;
pNew = Gia_ManToAig( p, 0 );
vFlops = Saig_ManProofAbstractionFlops( pNew, pPars );
p->pCexSeq = pNew->pSeqModel; pNew->pSeqModel = NULL;
Aig_ManStop( pNew );
return vFlops;
}
/**Function*************************************************************
Synopsis [Starts abstraction by computing latch map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManCexAbstractionStart( Gia_Man_t * p, Gia_ParAbs_t * pPars )
{
Vec_Int_t * vFlops;
if ( p->vFlopClasses != NULL )
{
printf( "Gia_ManCexAbstractionStart(): Abstraction latch map is present but will be rederived.\n" );
Vec_IntFreeP( &p->vFlopClasses );
}
vFlops = Gia_ManCexAbstractionFlops( p, pPars );
if ( vFlops )
{
p->vFlopClasses = Gia_ManFlops2Classes( p, vFlops );
Vec_IntFree( vFlops );
}
}
/**Function*************************************************************
Synopsis [Derives abstraction using the latch map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManCexAbstractionDerive( Gia_Man_t * pGia )
{
Vec_Int_t * vFlops;
Gia_Man_t * pAbs = NULL;
if ( pGia->vFlopClasses == NULL )
{
printf( "Gia_ManCexAbstractionDerive(): Abstraction latch map is missing.\n" );
return NULL;
}
vFlops = Gia_ManClasses2Flops( pGia->vFlopClasses );
pAbs = Gia_ManCexAbstraction( pGia, vFlops );
Vec_IntFree( vFlops );
return pAbs;
}
/**Function*************************************************************
Synopsis [Refines abstraction using the latch map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Gia_ManCexAbstractionRefine( Gia_Man_t * pGia, Abc_Cex_t * pCex, int fTryFour, int fSensePath, int fVerbose )
{
Aig_Man_t * pNew;
Vec_Int_t * vFlops;
if ( pGia->vFlopClasses == NULL )
{
printf( "Gia_ManCexAbstractionRefine(): Abstraction latch map is missing.\n" );
return -1;
}
pNew = Gia_ManToAig( pGia, 0 );
vFlops = Gia_ManClasses2Flops( pGia->vFlopClasses );
if ( !Saig_ManCexRefineStep( pNew, vFlops, pCex, fTryFour, fSensePath, fVerbose ) )
{
pGia->pCexSeq = pNew->pSeqModel; pNew->pSeqModel = NULL;
Vec_IntFree( vFlops );
Aig_ManStop( pNew );
return 0;
}
Vec_IntFree( pGia->vFlopClasses );
pGia->vFlopClasses = Gia_ManFlops2Classes( pGia, vFlops );
Vec_IntFree( vFlops );
Aig_ManStop( pNew );
return -1;
}
/**Function*************************************************************
Synopsis [Starts abstraction by computing latch map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManProofAbstractionStart( Gia_Man_t * pGia, Gia_ParAbs_t * pPars )
{
Vec_Int_t * vFlops;
if ( pGia->vFlopClasses != NULL )
{
printf( "Gia_ManProofAbstractionStart(): Abstraction latch map is present but will be rederived.\n" );
Vec_IntFreeP( &pGia->vFlopClasses );
}
vFlops = Gia_ManProofAbstractionFlops( pGia, pPars );
if ( vFlops )
{
pGia->vFlopClasses = Gia_ManFlops2Classes( pGia, vFlops );
Vec_IntFree( vFlops );
}
}
/**Function*************************************************************
Synopsis [Read flop map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Str_t * Gia_ManReadFile( char * pFileName )
{
FILE * pFile;
Vec_Str_t * vStr;
int c;
pFile = fopen( pFileName, "r" );
if ( pFile == NULL )
{
printf( "Cannot open file \"%s\".\n", pFileName );
return NULL;
}
vStr = Vec_StrAlloc( 100 );
while ( (c = fgetc(pFile)) != EOF )
Vec_StrPush( vStr, (char)c );
Vec_StrPush( vStr, '\0' );
fclose( pFile );
return vStr;
}
/**Function*************************************************************
Synopsis [Read flop map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManReadBinary( char * pFileName, char * pToken )
{
Vec_Int_t * vMap = NULL;
Vec_Str_t * vStr;
char * pStr;
int i, Length;
vStr = Gia_ManReadFile( pFileName );
if ( vStr == NULL )
return NULL;
pStr = Vec_StrArray( vStr );
pStr = strstr( pStr, pToken );
if ( pStr != NULL )
{
pStr += strlen( pToken );
vMap = Vec_IntAlloc( 100 );
Length = strlen( pStr );
for ( i = 0; i < Length; i++ )
{
if ( pStr[i] == '0' )
Vec_IntPush( vMap, 0 );
else if ( pStr[i] == '1' )
Vec_IntPush( vMap, 1 );
if ( ('a' <= pStr[i] && pStr[i] <= 'z') ||
('A' <= pStr[i] && pStr[i] <= 'Z') )
break;
}
}
Vec_StrFree( vStr );
return vMap;
}
/**Function*************************************************************
Synopsis [Read flop map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Gia_ManReadInteger( char * pFileName, char * pToken )
{
int Result = -1;
Vec_Str_t * vStr;
char * pStr;
vStr = Gia_ManReadFile( pFileName );
if ( vStr == NULL )
return -1;
pStr = Vec_StrArray( vStr );
pStr = strstr( pStr, pToken );
if ( pStr != NULL )
Result = atoi( pStr + strlen(pToken) );
Vec_StrFree( vStr );
return Result;
}
/**Function*************************************************************
Synopsis [Starts abstraction by computing latch map.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManCexAbstractionStartNew( Gia_Man_t * pGia, Gia_ParAbs_t * pPars )
{
char BufTimeOut[100];
char BufTimeOutVT[100];
char Command[1000];
char * pFileNameIn = "cex_abstr_in_.aig";
char * pFileNameOut = "cex_abstr_out_.txt";
FILE * pFile;
Vec_Int_t * vCex;
int RetValue, clk;
if ( pGia->vFlopClasses != NULL )
{
printf( "Gia_ManCexAbstractionStartNew(): Abstraction latch map is present but will be rederived.\n" );
Vec_IntFreeP( &pGia->vFlopClasses );
}
Gia_WriteAiger( pGia, pFileNameIn, 0, 0 );
sprintf( BufTimeOut, "-timeout=%d", pPars->TimeOut );
sprintf( BufTimeOutVT, "-vt=%d", pPars->TimeOutVT );
//ABC switch => cex_abstr switch
//-cba => <input> <output>
//-pba => ,bmc -pba-soft <input> <output>
//-cba-then-pba => -pba-soft <input> <output>
//-cba-with-pba => -pba <input> <output>
if ( pPars->Algo == 0 )
{
sprintf( Command, "cex_abstr %s %s -depth=%d -stable=%d -confl=%d -bob=%d %s %s %s %s",
pPars->fVerbose? "":"-quiet",
pPars->fVeryVerbose? "-sat-verbosity=1":"",
pPars->nFramesBmc, pPars->nStableMax, pPars->nConfMaxBmc, pPars->nBobPar,
pPars->TimeOut? BufTimeOut : "",
pPars->TimeOutVT? BufTimeOutVT : "",
pFileNameIn, pFileNameOut );
}
else if ( pPars->Algo == 1 )
{
sprintf( Command, "cex_abstr %s %s -depth=%d -confl=%d -bob=%d ,bmc -pba-soft %s %s %s %s",
pPars->fVerbose? "":"-quiet",
pPars->fVeryVerbose? "-sat-verbosity=1":"",
pPars->nFramesBmc, pPars->nConfMaxBmc, pPars->nBobPar,
pPars->TimeOut? BufTimeOut : "",
pPars->TimeOutVT? BufTimeOutVT : "",
pFileNameIn, pFileNameOut );
}
else if ( pPars->Algo == 2 )
{
sprintf( Command, "cex_abstr %s %s -depth=%d -stable=%d -confl=%d -bob=%d -pba-soft %s %s %s %s",
pPars->fVerbose? "":"-quiet",
pPars->fVeryVerbose? "-sat-verbosity=1":"",
pPars->nFramesBmc, pPars->nStableMax, pPars->nConfMaxBmc, pPars->nBobPar,
pPars->TimeOut? BufTimeOut : "",
pPars->TimeOutVT? BufTimeOutVT : "",
pFileNameIn, pFileNameOut );
}
else if ( pPars->Algo == 3 )
{
sprintf( Command, "cex_abstr %s %s -depth=%d -stable=%d -confl=%d -bob=%d -pba %s %s %s %s",
pPars->fVerbose? "":"-quiet",
pPars->fVeryVerbose? "-sat-verbosity=1":"",
pPars->nFramesBmc, pPars->nStableMax, pPars->nConfMaxBmc, pPars->nBobPar,
pPars->TimeOut? BufTimeOut : "",
pPars->TimeOutVT? BufTimeOutVT : "",
pFileNameIn, pFileNameOut );
}
else
{
printf( "Unnknown option (algo=%d). CBA (algo=0) is assumed.\n", pPars->Algo );
sprintf( Command, "cex_abstr %s %s -depth=%d -stable=%d -confl=%d -bob=%d %s %s %s %s",
pPars->fVerbose? "":"-quiet",
pPars->fVeryVerbose? "-sat-verbosity=1":"",
pPars->nFramesBmc, pPars->nStableMax, pPars->nConfMaxBmc, pPars->nBobPar,
pPars->TimeOut? BufTimeOut : "",
pPars->TimeOutVT? BufTimeOutVT : "",
pFileNameIn, pFileNameOut );
}
// run the command
printf( "Executing command line \"%s\"\n", Command );
clk = clock();
RetValue = system( Command );
clk = clock() - clk;
#ifdef WIN32
_unlink( pFileNameIn );
#else
unlink( pFileNameIn );
#endif
if ( RetValue == -1 )
{
fprintf( stdout, "Command \"%s\" did not succeed.\n", Command );
return;
}
// check that the input PostScript file is okay
if ( (pFile = fopen( pFileNameOut, "r" )) == NULL )
{
fprintf( stdout, "Cannot open intermediate file \"%s\".\n", pFileNameOut );
return;
}
fclose( pFile );
pPars->nFramesDone = Gia_ManReadInteger( pFileNameOut, "depth:" );
if ( pPars->nFramesDone == -1 )
printf( "Gia_ManCexAbstractionStartNew(): Cannot read the number of frames covered by BMC.\n" );
pGia->vFlopClasses = Gia_ManReadBinary( pFileNameOut, "abstraction:" );
vCex = Gia_ManReadBinary( pFileNameOut, "counter-example:" );
if ( vCex )
{
int nFrames = (Vec_IntSize(vCex) - Gia_ManRegNum(pGia)) / Gia_ManPiNum(pGia);
int nRemain = (Vec_IntSize(vCex) - Gia_ManRegNum(pGia)) % Gia_ManPiNum(pGia);
if ( nRemain != 0 )
{
printf( "Counter example has a wrong length.\n" );
}
else
{
printf( "Problem is satisfiable. Found counter-example in frame %d. ", nFrames-1 );
Abc_PrintTime( 1, "Time", clk );
pGia->pCexSeq = Abc_CexCreate( Gia_ManRegNum(pGia), Gia_ManPiNum(pGia), Vec_IntArray(vCex), nFrames-1, 0, 0 );
if ( !Gia_ManVerifyCex( pGia, pGia->pCexSeq, 0 ) )
Abc_Print( 1, "Generated counter-example is INVALID.\n" );
pPars->Status = 0;
}
Vec_IntFreeP( &vCex );
}
#ifdef WIN32
_unlink( pFileNameOut );
#else
unlink( pFileNameOut );
#endif
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
