API to return number of conflicts and decisions after hitting resource limits

[amatuag]

Hi Armin,

This is Siddharth here. I am requesting an enhancement for this as discussed.

int get_resource(const char * name); // name = "conflicts"/"decisions"

This would be useful in an example incremental flow as shown below,

solver->limit("conflicts",);
solver->limit("decisions",);
//Add clauses
solver->assume(..);
int conflicts,decisions;
if ( solver->solve() == 0 ) { //aborted due to resource limit
conflicts = solver->get_resource("conflicts");
decisionss = solver->get_resource("decisions");
}
//Adjust limits based on conflicts/decisions reached before next incremental call

I was able to get this info with a minor change in solver.cpp (get_resource declared in cadical.hpp)

int Solver::get_resource (const char * arg) {
    if ( !is_valid_limit(arg) ) return 0;
    //strcmp returns 0 if strings are equal
    if ( strcmp(arg,"conflicts") == 0 ) return internal->stats.conflicts;
    if ( strcmp(arg,"decisions") == 0 ) return internal->stats.decisions;
    return 0;
}

Thanks