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fix #889

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-11-06 15:25:10 -08:00
parent 861a0745c1
commit 9d3518736b
2 changed files with 7 additions and 10 deletions
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9
src/smt/asserted_formulas.cpp
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@ -511,11 +511,14 @@ void asserted_formulas::update_substitution(expr* n, proof* pr) {
}
TRACE("propagate_values", tout << "incompatible " << mk_pp(n, m) << "\n";);
}
if (m.is_not(n, n1)) {
m_scoped_substitution.insert(n1, m.mk_false(), m.proofs_enabled() ? m.mk_iff_false(pr) : nullptr);
proof_ref pr1(m);
if (m.is_not(n, n1)) {
pr1 = m.proofs_enabled() ? m.mk_iff_false(pr) : nullptr;
m_scoped_substitution.insert(n1, m.mk_false(), pr1);
}
else {
m_scoped_substitution.insert(n, m.mk_true(), m.proofs_enabled() ? m.mk_iff_true(pr) : nullptr);
pr1 = m.proofs_enabled() ? m.mk_iff_true(pr) : nullptr;
m_scoped_substitution.insert(n, m.mk_true(), pr1);
}
}