int InstStrategyCegqi::process( Node f, Theory::Effort effort, int e ) {
if( e<2 ){
return STATUS_UNFINISHED;
}else if( e==2 ){
CegInstantiator * cinst;
std::map< Node, CegInstantiator * >::iterator it = d_cinst.find( f );
if( it==d_cinst.end() ){
cinst = new CegInstantiator( d_quantEngine, d_out );
if( d_n_delta.isNull() ){
d_n_delta = NodeManager::currentNM()->mkSkolem( "delta", NodeManager::currentNM()->realType(), "delta for cegqi inst strategy" );
Node delta_lem = NodeManager::currentNM()->mkNode( GT, d_n_delta, NodeManager::currentNM()->mkConst( Rational( 0 ) ) );
d_quantEngine->getOutputChannel().lemma( delta_lem );
}
cinst->d_n_delta = d_n_delta;
for( int i=0; i<d_quantEngine->getTermDatabase()->getNumInstantiationConstants( f ); i++ ){
cinst->d_vars.push_back( d_quantEngine->getTermDatabase()->getInstantiationConstant( f, i ) );
}
d_cinst[f] = cinst;
}else{
cinst = it->second;
}
if( d_check_delta_lemma ){
Trace("inst-alg") << "-> Get delta lemmas for cegqi..." << std::endl;
d_check_delta_lemma = false;
std::vector< Node > dlemmas;
cinst->getDeltaLemmas( dlemmas );
Trace("inst-alg") << "...got " << dlemmas.size() << " delta lemmas." << std::endl;
if( !dlemmas.empty() ){
bool addedLemma = false;
for( unsigned i=0; i<dlemmas.size(); i++ ){
if( addLemma( dlemmas[i] ) ){
addedLemma = true;
}
}
if( addedLemma ){
return STATUS_UNKNOWN;
}
}
}
Trace("inst-alg") << "-> Run cegqi for " << f << std::endl;
d_curr_quant = f;
cinst->check();
d_curr_quant = Node::null();
}
return STATUS_UNKNOWN;
}
