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fix #4577

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-07-20 14:40:45 -07:00
parent 61b85d7123
commit ebce0b3612
1 changed files with 14 additions and 1 deletions
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15
src/ast/rewriter/array_rewriter.cpp
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@ -691,16 +691,29 @@ expr_ref array_rewriter::expand_store(expr* s) {
br_status array_rewriter::mk_eq_core(expr * lhs, expr * rhs, expr_ref & result) {
TRACE("array_rewriter", tout << mk_bounded_pp(lhs, m(), 2) << " " << mk_bounded_pp(rhs, m(), 2) << "\n";);
expr* v = nullptr;
expr* v = nullptr, *w = nullptr;
if (m_util.is_const(rhs) && is_lambda(lhs)) {
std::swap(lhs, rhs);
}
if (m_util.is_const(rhs) && m_util.is_store(lhs)) {
std::swap(lhs, rhs);
}
if (m_util.is_const(lhs, v) && m_util.is_const(rhs, w)) {
result = m().mk_eq(v, w);
return BR_REWRITE1;
}
if (m_util.is_const(lhs, v) && is_lambda(rhs)) {
quantifier* lam = to_quantifier(rhs);
expr_ref e(m().mk_eq(lam->get_expr(), v), m());
result = m().update_quantifier(lam, quantifier_kind::forall_k, e);
return BR_REWRITE2;
}
if (m_util.is_const(lhs, v) && m_util.is_store(rhs)) {
expr_ref eq1(m().mk_eq(v, to_app(rhs)->get_arg(to_app(rhs)->get_num_args()-1)), m());
expr_ref eq2(m().mk_eq(lhs, to_app(rhs)->get_arg(0)), m());
result = m().mk_and(eq1, eq2);
return BR_REWRITE3;
}
expr_ref lh1(m()), rh1(m());
if (m_expand_nested_stores) {
if (is_expandable_store(lhs)) {