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/**CFile****************************************************************
FileName [abcVerify.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Combinational and sequential verification for two networks.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcVerify.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
#include "fraig.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static int * Abc_NtkVerifyGetCleanModel( Abc_Ntk_t * pNtk );
static int * Abc_NtkVerifySimulatePattern( Abc_Ntk_t * pNtk, int * pModel );
static void Abc_NtkVerifyReportError( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int * pModel );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Verifies combinational equivalence by brute-force SAT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkCecSat( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds )
{
Abc_Ntk_t * pMiter;
Abc_Ntk_t * pCnf;
int RetValue;
// get the miter of the two networks
pMiter = Abc_NtkMiter( pNtk1, pNtk2, 1 );
if ( pMiter == NULL )
{
printf( "Miter computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pMiter );
if ( RetValue == 0 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
// report the error
pMiter->pModel = Abc_NtkVerifyGetCleanModel( pMiter );
Abc_NtkVerifyReportError( pNtk1, pNtk2, pMiter->pModel );
FREE( pMiter->pModel );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are equivalent after structural hashing.\n" );
return;
}
// convert the miter into a CNF
pCnf = Abc_NtkRenode( pMiter, 0, 100, 1, 0, 0 );
Abc_NtkDelete( pMiter );
if ( pCnf == NULL )
{
printf( "Renoding for CNF has failed.\n" );
return;
}
// solve the CNF using the SAT solver
RetValue = Abc_NtkMiterSat( pCnf, nSeconds, 0 );
if ( RetValue == -1 )
printf( "Networks are undecided (SAT solver timed out).\n" );
else if ( RetValue == 0 )
printf( "Networks are NOT EQUIVALENT after SAT.\n" );
else
printf( "Networks are equivalent after SAT.\n" );
if ( pCnf->pModel )
Abc_NtkVerifyReportError( pNtk1, pNtk2, pCnf->pModel );
FREE( pCnf->pModel );
Abc_NtkDelete( pCnf );
}
/**Function*************************************************************
Synopsis [Verifies sequential equivalence by fraiging followed by SAT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkCecFraig( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int fVerbose )
{
Fraig_Params_t Params;
Fraig_Man_t * pMan;
Abc_Ntk_t * pMiter;
int RetValue;
// get the miter of the two networks
pMiter = Abc_NtkMiter( pNtk1, pNtk2, 1 );
if ( pMiter == NULL )
{
printf( "Miter computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pMiter );
if ( RetValue == 0 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
// report the error
pMiter->pModel = Abc_NtkVerifyGetCleanModel( pMiter );
Abc_NtkVerifyReportError( pNtk1, pNtk2, pMiter->pModel );
FREE( pMiter->pModel );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are equivalent after structural hashing.\n" );
return;
}
// convert the miter into a FRAIG
Fraig_ParamsSetDefault( &Params );
Params.fVerbose = fVerbose;
Params.nSeconds = nSeconds;
pMan = Abc_NtkToFraig( pMiter, &Params, 0 );
Fraig_ManProveMiter( pMan );
// analyze the result
RetValue = Fraig_ManCheckMiter( pMan );
// report the result
if ( RetValue == -1 )
printf( "Networks are undecided (SAT solver timed out on the final miter).\n" );
else if ( RetValue == 1 )
printf( "Networks are equivalent after fraiging.\n" );
else if ( RetValue == 0 )
{
printf( "Networks are NOT EQUIVALENT after fraiging.\n" );
Abc_NtkVerifyReportError( pNtk1, pNtk2, Fraig_ManReadModel(pMan) );
}
else assert( 0 );
// delete the fraig manager
Fraig_ManFree( pMan );
// delete the miter
Abc_NtkDelete( pMiter );
}
/**Function*************************************************************
Synopsis [Verifies sequential equivalence by brute-force SAT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkSecSat( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int nFrames )
{
Abc_Ntk_t * pMiter;
Abc_Ntk_t * pFrames;
Abc_Ntk_t * pCnf;
int RetValue;
// get the miter of the two networks
pMiter = Abc_NtkMiter( pNtk1, pNtk2, 0 );
if ( pMiter == NULL )
{
printf( "Miter computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pMiter );
if ( RetValue == 0 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are equivalent after structural hashing.\n" );
return;
}
// create the timeframes
pFrames = Abc_NtkFrames( pMiter, nFrames, 1 );
Abc_NtkDelete( pMiter );
if ( pFrames == NULL )
{
printf( "Frames computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pFrames );
if ( RetValue == 0 )
{
Abc_NtkDelete( pFrames );
printf( "Networks are NOT EQUIVALENT after framing.\n" );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pFrames );
printf( "Networks are equivalent after framing.\n" );
return;
}
// convert the miter into a CNF
pCnf = Abc_NtkRenode( pFrames, 0, 100, 1, 0, 0 );
Abc_NtkDelete( pFrames );
if ( pCnf == NULL )
{
printf( "Renoding for CNF has failed.\n" );
return;
}
// solve the CNF using the SAT solver
RetValue = Abc_NtkMiterSat( pCnf, nSeconds, 0 );
if ( RetValue == -1 )
printf( "Networks are undecided (SAT solver timed out).\n" );
else if ( RetValue == 0 )
printf( "Networks are NOT EQUIVALENT after SAT.\n" );
else
printf( "Networks are equivalent after SAT.\n" );
Abc_NtkDelete( pCnf );
}
/**Function*************************************************************
Synopsis [Verifies combinational equivalence by fraiging followed by SAT]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkSecFraig( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int nSeconds, int nFrames, int fVerbose )
{
Fraig_Params_t Params;
Fraig_Man_t * pMan;
Abc_Ntk_t * pMiter;
Abc_Ntk_t * pFrames;
int RetValue;
// get the miter of the two networks
pMiter = Abc_NtkMiter( pNtk1, pNtk2, 0 );
if ( pMiter == NULL )
{
printf( "Miter computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pMiter );
if ( RetValue == 0 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are NOT EQUIVALENT after structural hashing.\n" );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pMiter );
printf( "Networks are equivalent after structural hashing.\n" );
return;
}
// create the timeframes
pFrames = Abc_NtkFrames( pMiter, nFrames, 1 );
Abc_NtkDelete( pMiter );
if ( pFrames == NULL )
{
printf( "Frames computation has failed.\n" );
return;
}
RetValue = Abc_NtkMiterIsConstant( pFrames );
if ( RetValue == 0 )
{
Abc_NtkDelete( pFrames );
printf( "Networks are NOT EQUIVALENT after framing.\n" );
return;
}
if ( RetValue == 1 )
{
Abc_NtkDelete( pFrames );
printf( "Networks are equivalent after framing.\n" );
return;
}
// convert the miter into a FRAIG
Fraig_ParamsSetDefault( &Params );
Params.fVerbose = fVerbose;
Params.nSeconds = nSeconds;
pMan = Abc_NtkToFraig( pFrames, &Params, 0 );
Fraig_ManProveMiter( pMan );
// analyze the result
RetValue = Fraig_ManCheckMiter( pMan );
// report the result
if ( RetValue == -1 )
printf( "Networks are undecided (SAT solver timed out on the final miter).\n" );
else if ( RetValue == 1 )
printf( "Networks are equivalent after fraiging.\n" );
else if ( RetValue == 0 )
{
printf( "Networks are NOT EQUIVALENT after fraiging.\n" );
// Abc_NtkVerifyReportError( pNtk1, pNtk2, Fraig_ManReadModel(pMan) );
}
else assert( 0 );
// delete the fraig manager
Fraig_ManFree( pMan );
// delete the miter
Abc_NtkDelete( pFrames );
}
/**Function*************************************************************
Synopsis [Reports mismatch between the two networks.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkVerifyReportError( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int * pModel )
{
Vec_Ptr_t * vNodes;
Abc_Obj_t * pNode;
int * pValues1, * pValues2;
int nMisses, nPrinted, i, iNode = -1;
assert( Abc_NtkCiNum(pNtk1) == Abc_NtkCiNum(pNtk2) );
assert( Abc_NtkCoNum(pNtk1) == Abc_NtkCoNum(pNtk2) );
// get the CO values under this model
pValues1 = Abc_NtkVerifySimulatePattern( pNtk1, pModel );
pValues2 = Abc_NtkVerifySimulatePattern( pNtk2, pModel );
// count the mismatches
nMisses = 0;
for ( i = 0; i < Abc_NtkCoNum(pNtk1); i++ )
nMisses += (int)( pValues1[i] != pValues2[i] );
printf( "Verification failed for %d outputs: ", nMisses );
// print the first 3 outputs
nPrinted = 0;
for ( i = 0; i < Abc_NtkCoNum(pNtk1); i++ )
if ( pValues1[i] != pValues2[i] )
{
if ( iNode == -1 )
iNode = i;
printf( " %s", Abc_ObjName(Abc_NtkCo(pNtk1,i)) );
if ( ++nPrinted == 3 )
break;
}
if ( nPrinted != nMisses )
printf( " ..." );
printf( "\n" );
// report mismatch for the first output
if ( iNode >= 0 )
{
printf( "Output %s: Value in Network1 = %d. Value in Network2 = %d.\n",
Abc_ObjName(Abc_NtkCo(pNtk1,iNode)), pValues1[iNode], pValues2[iNode] );
printf( "Input pattern: " );
// collect PIs in the cone
pNode = Abc_NtkCo(pNtk1,iNode);
vNodes = Abc_NtkNodeSupport( pNtk1, &pNode, 1 );
// set the PI numbers
Abc_NtkForEachCi( pNtk1, pNode, i )
pNode->pCopy = (void*)i;
// print the model
Vec_PtrForEachEntry( vNodes, pNode, i )
{
assert( Abc_ObjIsCi(pNode) );
printf( " %s=%d", Abc_ObjName(pNode), pModel[(int)pNode->pCopy] );
}
printf( "\n" );
Vec_PtrFree( vNodes );
}
free( pValues1 );
free( pValues2 );
}
/**Function*************************************************************
Synopsis [Returns a dummy pattern full of zeros.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int * Abc_NtkVerifyGetCleanModel( Abc_Ntk_t * pNtk )
{
int * pModel = ALLOC( int, Abc_NtkCiNum(pNtk) );
memset( pModel, 0, sizeof(int) * Abc_NtkCiNum(pNtk) );
return pModel;
}
/**Function*************************************************************
Synopsis [Returns the PO values under the given input pattern.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int * Abc_NtkVerifySimulatePattern( Abc_Ntk_t * pNtk, int * pModel )
{
Vec_Ptr_t * vNodes;
Abc_Obj_t * pNode;
int * pValues, Value0, Value1, i;
int fStrashed = 0;
if ( !Abc_NtkIsStrash(pNtk) )
{
pNtk = Abc_NtkStrash(pNtk, 0, 0);
fStrashed = 1;
}
// increment the trav ID
Abc_NtkIncrementTravId( pNtk );
// set the CI values
Abc_NtkForEachCi( pNtk, pNode, i )
pNode->pCopy = (void *)pModel[i];
// simulate in the topological order
vNodes = Abc_NtkDfs( pNtk, 1 );
Vec_PtrForEachEntry( vNodes, pNode, i )
{
if ( Abc_NodeIsConst(pNode) )
pNode->pCopy = NULL;
else
{
Value0 = ((int)Abc_ObjFanin0(pNode)->pCopy) ^ Abc_ObjFaninC0(pNode);
Value1 = ((int)Abc_ObjFanin1(pNode)->pCopy) ^ Abc_ObjFaninC1(pNode);
pNode->pCopy = (void *)(Value0 & Value1);
}
}
Vec_PtrFree( vNodes );
// fill the output values
pValues = ALLOC( int, Abc_NtkCoNum(pNtk) );
Abc_NtkForEachCo( pNtk, pNode, i )
pValues[i] = ((int)Abc_ObjFanin0(pNode)->pCopy) ^ Abc_ObjFaninC0(pNode);
if ( fStrashed )
Abc_NtkDelete( pNtk );
return pValues;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
