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adding checks for #570

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-05-03 11:09:05 -07:00
parent 6895cc7cc6
commit 91af947863
2 changed files with 25 additions and 9 deletions
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8
src/sat/sat_clause_set.cpp
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@ -35,6 +35,8 @@ namespace sat {
unsigned id = c.id();
if (id >= m_id2pos.size())
return;
if (empty())
return;
unsigned pos = m_id2pos[id];
if (pos == UINT_MAX)
return;
@ -52,7 +54,11 @@ namespace sat {
clause & clause_set::erase() {
SASSERT(!empty());
clause & c = *m_set.back();
m_id2pos[c.id()] = UINT_MAX;
SASSERT(c.id() < m_id2pos.size());
SASSERT(m_id2pos[c.id()] == m_set.size()-1);
if (c.id() < m_id2pos.size()) {
m_id2pos[c.id()] = UINT_MAX;
}
m_set.pop_back();
return c;
}