ostream& output(ostream& str) const
{
CALLM(_name,"output(ostream& str) const");
str << '{';
for (const CarrierType* el = _registered.begin(); el < _registered.end(); el++)
{
str << scoreOf(*el) << '*' << *el;
if (el != _registered.last()) str << ' ';
};
return str << '}';
};
void Solver::decideLiteral() {
// establish another decision stack level
stack_.push_back(
StackLevel(stack_.top().currentRemainingComponent(),
literal_stack_.size(),
component_analyzer_.component_stack_size()));
float score;
float max_score_remembered = -1;
float max_score_forgotten = -1;
unsigned max_score_var = 0;
unsigned max_score_var_remembered = 0;
unsigned max_score_var_forgotten = 0;
for (auto it =
component_analyzer_.superComponentOf(stack_.top()).varsBegin();
*it != varsSENTINEL; it++) {
score = scoreOf(*it);
if (rememberedVarNums.find(*it) != rememberedVarNums.end()) {
if (score > max_score_remembered) {
max_score_remembered = score;
max_score_var_remembered = *it;
}
} else {
if (score > max_score_forgotten) {
max_score_forgotten = score;
max_score_var_forgotten = *it;
}
}
}
if (max_score_var_remembered != 0 ) {
max_score_var = max_score_var_remembered;
} else if (max_score_var_forgotten != 0 ) {
max_score_var = max_score_var_forgotten;
} else assert(0);
// this assert should always hold,
// if not then there is a bug in the logic of countSAT();
assert(max_score_var != 0);
LiteralID theLit(max_score_var,
literal(LiteralID(max_score_var, true)).activity_score_
> literal(LiteralID(max_score_var, false)).activity_score_);
setLiteralIfFree(theLit);
statistics_.num_decisions_++;
if (statistics_.num_decisions_ % 128 == 0)
decayActivities();
assert(
stack_.top().remaining_components_ofs() <= component_analyzer_.component_stack_size());
}