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fix unsat core extraction code in smt_context

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-30 11:22:34 -07:00
parent d32019f4c9
commit 7346098895
3 changed files with 19 additions and 14 deletions
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9
src/smt/smt_context.cpp
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@ -3044,7 +3044,7 @@ namespace smt {
SASSERT(m_assumptions.empty());
return;
}
obj_hashtable<expr> already_found_assumptions;
uint_set already_found_assumptions;
literal_vector::const_iterator it = m_conflict_resolution->begin_unsat_core();
literal_vector::const_iterator end = m_conflict_resolution->end_unsat_core();
for (; it != end; ++it) {
@ -3053,10 +3053,9 @@ namespace smt {
SASSERT(get_bdata(l.var()).m_assumption);
if (!m_literal2assumption.contains(l.index())) l.neg();
SASSERT(m_literal2assumption.contains(l.index()));
expr * a = m_literal2assumption[l.index()];
if (!already_found_assumptions.contains(a)) {
already_found_assumptions.insert(a);
m_unsat_core.push_back(a);
if (!already_found_assumptions.contains(l.index())) {
already_found_assumptions.insert(l.index());
m_unsat_core.push_back(m_literal2assumption[l.index()]);
}
}
reset_assumptions();