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fix bug in sat-solver where frozen clauses get re-attached

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-07-05 12:19:03 -07:00
parent eceb92f5ef
commit 1918395f0e
2 changed files with 10 additions and 6 deletions
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4
src/sat/sat_solver.h
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@ -682,10 +682,10 @@ namespace sat {
bool m_deleted;
public:
scoped_detach(solver& s, clause& c): s(s), c(c), m_deleted(false) {
s.detach_clause(c);
if (!c.frozen()) s.detach_clause(c);
}
~scoped_detach() {
if (!m_deleted) s.attach_clause(c);
if (!m_deleted && !c.frozen()) s.attach_clause(c);
}
void del_clause() {