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fix #2930

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-02-02 20:03:55 -08:00
parent 28c827fb69
commit 3760107bb8
1 changed files with 1 additions and 0 deletions
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1
src/tactic/core/reduce_invertible_tactic.cpp
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@ -236,6 +236,7 @@ private:
// TBD: could be made to be recursive, by walking multiple layers of parents.
bool is_invertible(expr* v, expr*& p, expr_ref& new_v, generic_model_converter_ref* mc, unsigned max_var = 0) {
if (m_parents.size() <= v->get_id()) return false;
p = m_parents[v->get_id()].get();
if (!p) return false;
if (m_inverted.is_marked(p)) return false;