Disallow the circiut-based solver in &scorr to run with more than 1000 conflicts.

src/proof/cec/cecCorr.c

@@ -872,6 +872,9 @@ int Cec_ManLSCorrespondenceClasses( Gia_Man_t * pAig, Cec_ParCor_t * pPars )
     Cec_ManSatSetDefaultParams( pParsSat );
     pParsSat->nBTLimit = pPars->nBTLimit;
     pParsSat->fVerbose = pPars->fVerbose;
+    // limit the number of conflicts in the circuit-based solver
+    if ( pPars->fUseCSat )
+        pParsSat->nBTLimit = Abc_MinInt( pParsSat->nBTLimit, 1000 );
     if ( pPars->fVerbose )
     {
         Abc_Print( 1, "Obj = %7d. And = %7d. Conf = %5d. Fr = %d. Lcorr = %d. Ring = %d. CSat = %d.\n",