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disable destructive equality resolution simplification if there are patterns
- regression from F\star - reported by @mtzguido (stlc_min.smt2)
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@ -827,7 +827,7 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
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expr_ref r(m());
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bool der_change = false;
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if (is_quantifier(result)) {
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if (is_quantifier(result) && to_quantifier(result)->get_num_patterns() == 0) {
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m_der(to_quantifier(result), r, p2);
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der_change = result.get() != r.get();
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if (m().proofs_enabled() && der_change)
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