void BacktrackEnumerator::undoLevel(Solver& s) {
while (!nogoods_.empty() && nogoods_.back().second >= s.decisionLevel()) {
Clause* c = (Clause*)nogoods_.back().first;
nogoods_.pop_back();
*c->end() = posLit(0);
c->removeWatches(s);
c->destroy();
}
}
void RecordEnumerator::addSolution(Solver& s) {
solution_.clear(); solution_.setSolver(s);
if (minimize() && minimize()->mode() == MinimizeConstraint::compare_less) return;
solution_.start(Constraint_t::learnt_conflict);
for (uint32 x = s.decisionLevel(); x != 0; --x) {
solution_.add(~s.decision(x));
}
if (minimize() && minimize()->models() == 1) {
ConstraintDB::size_type i, end, j = 0;
for (i = 0, end = nogoods_.size(); i != end; ++i) {
Clause* c = (Clause*)nogoods_[i];
if (c->locked(s)) {
nogoods_[j++] = c;
}
else {
c->removeWatches(s);
c->destroy();
}
}
nogoods_.erase(nogoods_.begin()+j, nogoods_.end());
}
}