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fix #4541

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-06-24 20:26:42 -07:00
parent 8d16a9a034
commit 85cb0293f5
3 changed files with 7 additions and 14 deletions
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16
src/sat/sat_solver.cpp
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@ -429,21 +429,13 @@ namespace sat {
bool solver::propagate_bin_clause(literal l1, literal l2) {
if (value(l2) == l_false) {
if (value(l1) == l_false) {
TRACE("sat", tout << "conflict " << l1 << " " << l2 << "\n";);
set_conflict(justification(std::max(lvl(l1), lvl(l2)), l1, l2));
}
else {
m_stats.m_bin_propagate++;
//TRACE("sat", tout << "propagate " << l1 << " <- " << ~l2 << "\n";);
assign(l1, justification(lvl(l2), l2));
}
m_stats.m_bin_propagate++;
assign(l1, justification(lvl(l2), l2));
return true;
}
else if (value(l1) == l_false) {
if (value(l1) == l_false) {
m_stats.m_bin_propagate++;
//TRACE("sat", tout << "propagate " << l2 << " <- " << ~l1 << "\n";);
assign(l2, justification(lvl(l1), l1) );
assign(l2, justification(lvl(l1), l1));
return true;
}
return false;