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fix #1471

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-02-05 18:54:14 -08:00
parent b8680f8a46
commit b2bd4dd3b4
3 changed files with 31 additions and 27 deletions
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26
src/sat/sat_solver.cpp
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@ -2641,15 +2641,22 @@ namespace sat {
clauses.shrink(j);
}
void solver::gc_bin(bool learned, literal nlit) {
m_user_bin_clauses.reset();
collect_bin_clauses(m_user_bin_clauses, learned);
for (unsigned i = 0; i < m_user_bin_clauses.size(); ++i) {
literal l1 = m_user_bin_clauses[i].first;
literal l2 = m_user_bin_clauses[i].second;
if (nlit == l1 || nlit == l2) {
detach_bin_clause(l1, l2, learned);
void solver::gc_bin(literal lit) {
bool_var v = lit.var();
for (watch_list& wlist : m_watches) {
watch_list::iterator it = wlist.begin();
watch_list::iterator it2 = wlist.begin();
watch_list::iterator end = wlist.end();
for (; it != end; ++it) {
if (it->is_binary_clause() && it->get_literal().var() == v) {
// skip
}
else {
*it2 = *it;
++it2;
}
}
wlist.set_end(it2);
}
}
@ -2724,8 +2731,7 @@ namespace sat {
gc_lit(m_learned, lit);
gc_lit(m_clauses, lit);
gc_bin(true, lit);
gc_bin(false, lit);
gc_bin(lit);
TRACE("sat", tout << "gc: " << lit << "\n"; display(tout););
--num_scopes;
for (unsigned i = 0; i < m_trail.size(); ++i) {