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/**CFile****************************************************************
FileName [pdrInv.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Property driven reachability.]
Synopsis [Invariant computation, printing, verification.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 20, 2010.]
Revision [$Id: pdrInv.c,v 1.00 2010/11/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "pdrInt.h"
#include "src/base/abc/abc.h" // for Abc_NtkCollectCioNames()
#include "src/base/main/main.h" // for Abc_FrameReadGlobalFrame()
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pdr_ManPrintProgress( Pdr_Man_t * p, int fClose, int Time )
{
Vec_Ptr_t * vVec;
int i, ThisSize, Length, LengthStart;
if ( Vec_PtrSize(p->vSolvers) < 2 )
return;
// count the total length of the printout
Length = 0;
Vec_VecForEachLevel( p->vClauses, vVec, i )
Length += 1 + Abc_Base10Log(Vec_PtrSize(vVec)+1);
// determine the starting point
LengthStart = Abc_MaxInt( 0, Length - 60 );
Abc_Print( 1, "%3d :", Vec_PtrSize(p->vSolvers)-1 );
ThisSize = 5;
if ( LengthStart > 0 )
{
Abc_Print( 1, " ..." );
ThisSize += 4;
}
Length = 0;
Vec_VecForEachLevel( p->vClauses, vVec, i )
{
if ( Length < LengthStart )
{
Length += 1 + Abc_Base10Log(Vec_PtrSize(vVec)+1);
continue;
}
Abc_Print( 1, " %d", Vec_PtrSize(vVec) );
Length += 1 + Abc_Base10Log(Vec_PtrSize(vVec)+1);
ThisSize += 1 + Abc_Base10Log(Vec_PtrSize(vVec)+1);
}
for ( i = ThisSize; i < 70; i++ )
Abc_Print( 1, " " );
Abc_Print( 1, "%6d", p->nQueMax );
Abc_Print( 1, " %8.2f sec", (float)(Time)/(float)(CLOCKS_PER_SEC) );
Abc_Print( 1, "%s", fClose ? "\n":"\r" );
if ( fClose )
p->nQueMax = 0;
}
/**Function*************************************************************
Synopsis [Counts how many times each flop appears in the set of cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Pdr_ManCountFlops( Pdr_Man_t * p, Vec_Ptr_t * vCubes )
{
Vec_Int_t * vFlopCount;
Pdr_Set_t * pCube;
int i, n;
vFlopCount = Vec_IntStart( Aig_ManRegNum(p->pAig) );
Vec_PtrForEachEntry( Pdr_Set_t *, vCubes, pCube, i )
for ( n = 0; n < pCube->nLits; n++ )
{
assert( pCube->Lits[n] >= 0 && pCube->Lits[n] < 2*Aig_ManRegNum(p->pAig) );
Vec_IntAddToEntry( vFlopCount, pCube->Lits[n] >> 1, 1 );
}
return vFlopCount;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Pdr_ManFindInvariantStart( Pdr_Man_t * p )
{
Vec_Ptr_t * vArrayK;
int k, kMax = Vec_PtrSize(p->vSolvers)-1;
Vec_VecForEachLevelStartStop( p->vClauses, vArrayK, k, 1, kMax+1 )
if ( Vec_PtrSize(vArrayK) == 0 )
return k;
// return -1;
// if there is no starting point (as in case of SAT or undecided), return the last frame
// Abc_Print( 1, "The last timeframe contains %d clauses.\n", Vec_PtrSize(Vec_VecEntry(p->vClauses, kMax)) );
return kMax;
}
/**Function*************************************************************
Synopsis [Counts the number of variables used in the clauses.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Pdr_ManCollectCubes( Pdr_Man_t * p, int kStart )
{
Vec_Ptr_t * vResult;
Vec_Ptr_t * vArrayK;
Pdr_Set_t * pSet;
int i, j;
vResult = Vec_PtrAlloc( 100 );
Vec_VecForEachLevelStart( p->vClauses, vArrayK, i, kStart )
Vec_PtrForEachEntry( Pdr_Set_t *, vArrayK, pSet, j )
Vec_PtrPush( vResult, pSet );
return vResult;
}
/**Function*************************************************************
Synopsis [Counts the number of variables used in the clauses.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Pdr_ManCountVariables( Pdr_Man_t * p, int kStart )
{
Vec_Int_t * vFlopCounts;
Vec_Ptr_t * vCubes;
int i, Entry, Counter = 0;
vCubes = Pdr_ManCollectCubes( p, kStart );
vFlopCounts = Pdr_ManCountFlops( p, vCubes );
Vec_IntForEachEntry( vFlopCounts, Entry, i )
Counter += (Entry > 0);
Vec_IntFreeP( &vFlopCounts );
Vec_PtrFree( vCubes );
return Counter;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pdr_ManPrintClauses( Pdr_Man_t * p, int kStart )
{
Vec_Ptr_t * vArrayK;
Pdr_Set_t * pCube;
int i, k, Counter = 0;
Vec_VecForEachLevelStart( p->vClauses, vArrayK, k, kStart )
{
Vec_PtrSort( vArrayK, (int (*)(void))Pdr_SetCompare );
Vec_PtrForEachEntry( Pdr_Set_t *, vArrayK, pCube, i )
{
Abc_Print( 1, "C=%4d. F=%4d ", Counter++, k );
Pdr_SetPrint( stdout, pCube, Aig_ManRegNum(p->pAig), NULL );
Abc_Print( 1, "\n" );
}
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pdr_ManDumpClauses( Pdr_Man_t * p, char * pFileName, int fProved )
{
int fUseSupp = 1;
FILE * pFile;
Vec_Int_t * vFlopCounts;
Vec_Ptr_t * vCubes;
Pdr_Set_t * pCube;
char ** pNamesCi;
int i, kStart;
// create file
pFile = fopen( pFileName, "w" );
if ( pFile == NULL )
{
Abc_Print( 1, "Cannot open file \"%s\" for writing invariant.\n", pFileName );
return;
}
// collect cubes
kStart = Pdr_ManFindInvariantStart( p );
vCubes = Pdr_ManCollectCubes( p, kStart );
Vec_PtrSort( vCubes, (int (*)(void))Pdr_SetCompare );
// collect variable appearances
vFlopCounts = fUseSupp ? Pdr_ManCountFlops( p, vCubes ) : NULL;
// output the header
if ( fProved )
fprintf( pFile, "# Inductive invariant for \"%s\"\n", p->pAig->pName );
else
fprintf( pFile, "# Clauses of the last timeframe for \"%s\"\n", p->pAig->pName );
fprintf( pFile, "# generated by PDR in ABC on %s\n", Aig_TimeStamp() );
fprintf( pFile, ".i %d\n", fUseSupp ? Pdr_ManCountVariables(p, kStart) : Aig_ManRegNum(p->pAig) );
fprintf( pFile, ".o 1\n" );
fprintf( pFile, ".p %d\n", Vec_PtrSize(vCubes) );
// output flop names
pNamesCi = Abc_NtkCollectCioNames( Abc_FrameReadNtk( Abc_FrameReadGlobalFrame() ), 0 );
if ( pNamesCi )
{
fprintf( pFile, ".ilb" );
for ( i = 0; i < Aig_ManRegNum(p->pAig); i++ )
if ( !fUseSupp || Vec_IntEntry( vFlopCounts, i ) )
fprintf( pFile, " %s", pNamesCi[Saig_ManPiNum(p->pAig) + i] );
fprintf( pFile, "\n" );
ABC_FREE( pNamesCi );
fprintf( pFile, ".ob inv\n" );
}
// output cubes
Vec_PtrForEachEntry( Pdr_Set_t *, vCubes, pCube, i )
{
Pdr_SetPrint( pFile, pCube, Aig_ManRegNum(p->pAig), vFlopCounts );
fprintf( pFile, " 1\n" );
}
fprintf( pFile, ".e\n\n" );
fclose( pFile );
Vec_IntFreeP( &vFlopCounts );
Vec_PtrFree( vCubes );
if ( fProved )
Abc_Print( 1, "Inductive invariant was written into file \"%s\".\n", pFileName );
else
Abc_Print( 1, "Clauses of the last timeframe were written into file \"%s\".\n", pFileName );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pdr_ManReportInvariant( Pdr_Man_t * p )
{
Vec_Ptr_t * vCubes;
int kStart = Pdr_ManFindInvariantStart( p );
vCubes = Pdr_ManCollectCubes( p, kStart );
Abc_Print( 1, "Invariant F[%d] : %d clauses with %d flops (out of %d)\n",
kStart, Vec_PtrSize(vCubes), Pdr_ManCountVariables(p, kStart), Aig_ManRegNum(p->pAig) );
Vec_PtrFree( vCubes );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pdr_ManVerifyInvariant( Pdr_Man_t * p )
{
sat_solver * pSat;
Vec_Int_t * vLits;
Vec_Ptr_t * vCubes;
Pdr_Set_t * pCube;
int i, kStart, kThis, RetValue, Counter = 0, clk = clock();
// collect cubes used in the inductive invariant
kStart = Pdr_ManFindInvariantStart( p );
vCubes = Pdr_ManCollectCubes( p, kStart );
// create solver with the cubes
kThis = Vec_PtrSize(p->vSolvers);
pSat = Pdr_ManCreateSolver( p, kThis );
// add the property output
Pdr_ManSetPropertyOutput( p, kThis );
// add the clauses
Vec_PtrForEachEntry( Pdr_Set_t *, vCubes, pCube, i )
{
vLits = Pdr_ManCubeToLits( p, kThis, pCube, 1, 0 );
RetValue = sat_solver_addclause( pSat, Vec_IntArray(vLits), Vec_IntArray(vLits) + Vec_IntSize(vLits) );
assert( RetValue );
sat_solver_compress( pSat );
}
// check each clause
Vec_PtrForEachEntry( Pdr_Set_t *, vCubes, pCube, i )
{
vLits = Pdr_ManCubeToLits( p, kThis, pCube, 0, 1 );
RetValue = sat_solver_solve( pSat, Vec_IntArray(vLits), Vec_IntArray(vLits) + Vec_IntSize(vLits), 0, 0, 0, 0 );
if ( RetValue != l_False )
{
Abc_Print( 1, "Verification of clause %d failed.\n", i );
Counter++;
}
}
if ( Counter )
Abc_Print( 1, "Verification of %d clauses has failed.\n", Counter );
else
{
Abc_Print( 1, "Verification of invariant with %d clauses was successful. ", Vec_PtrSize(vCubes) );
Abc_PrintTime( 1, "Time", clock() - clk );
}
// sat_solver_delete( pSat );
Vec_PtrFree( vCubes );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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