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fix bug in non-emptiness witness extraction

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-03-24 12:34:40 -07:00
parent da9d8c8694
commit 5803c6f202
7 changed files with 198 additions and 61 deletions
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22
src/ast/rewriter/bool_rewriter.cpp
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@ -1185,4 +1185,26 @@ void bool_rewriter::mk_ge2(expr* a, expr* b, expr* c, expr_ref& r) {
}
bool bool_rewriter::decompose_ite(expr *r, expr_ref &c, expr_ref &th, expr_ref &el) {
expr *cond = nullptr, *r1 = nullptr, *r2 = nullptr;
if (m().is_ite(r, cond, r1, r2)) {
c = cond;
th = r1;
el = r2;
return true;
}
for (expr *e : subterms::ground(expr_ref(r, m()))) {
if (m().is_ite(e, cond, r1, r2)) {
c = cond;
th = r1;
el = r2;
return true;
}
}
return false;
}
template class rewriter_tpl<bool_rewriter_cfg>;