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fix #4909

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-12-20 11:53:19 -08:00
parent 8e0a2c9e77
commit cd77a4d9a5
1 changed files with 1 additions and 1 deletions
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2
src/sat/tactic/goal2sat.cpp
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@ -566,12 +566,12 @@ struct goal2sat::imp : public sat::sat_internalizer {
else {
sat::bool_var k = add_var(false, t);
sat::literal l(k, false);
m_cache.insert(t, l);
mk_clause(~l, l1, ~l2);
mk_clause(~l, ~l1, l2);
mk_clause(l, l1, l2);
mk_clause(l, ~l1, ~l2);
if (aig()) aig()->add_iff(l, l1, l2);
m_cache.insert(t, m.is_xor(t) ? ~l : l);
if (sign)
l.neg();
m_result_stack.push_back(l);