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apply rewriting if result of destructive equality resolution is simplified

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This commit is contained in:
Nikolaj Bjorner 2023-02-19 11:03:04 -08:00
parent bc6037464d
commit 6454e7fa3f
1 changed files with 15 additions and 4 deletions
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19
src/ast/rewriter/th_rewriter.cpp
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@ -821,17 +821,28 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
result_pr = m().mk_transitivity(p1, p2); result_pr = m().mk_transitivity(p1, p2);
} }
TRACE("reduce_quantifier", tout << "after elim_unused_vars:\n" << result << " " << result_pr << "\n" ;);
proof_ref p2(m());
expr_ref r(m());
bool der_change = false;
if (is_quantifier(result)) { if (is_quantifier(result)) {
proof_ref p2(m());
expr_ref r(m());
m_der(to_quantifier(result), r, p2); m_der(to_quantifier(result), r, p2);
der_change = result.get() != r.get();
if (m().proofs_enabled() && der_change)
result_pr = m().mk_transitivity(result_pr, p2);
result = r;
}
if (der_change) {
th_rewriter rw(m());
rw(result, r, p2);
if (m().proofs_enabled() && result.get() != r.get()) if (m().proofs_enabled() && result.get() != r.get())
result_pr = m().mk_transitivity(result_pr, p2); result_pr = m().mk_transitivity(result_pr, p2);
result = r; result = r;
} }
TRACE("reduce_quantifier", tout << "after elim_unused_vars:\n" << result << " " << result_pr << "\n" ;);
SASSERT(old_q->get_sort() == result->get_sort()); SASSERT(old_q->get_sort() == result->get_sort());
return true; return true;
} }