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more resilient equality adapter

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This commit is contained in:
Nikolaj Bjorner 2020-10-12 10:35:01 -07:00
parent ae7d76767b
commit e3d1849be2
2 changed files with 14 additions and 3 deletions
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5
src/smt/smt_theory.h
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@ -524,8 +524,13 @@ namespace smt {
behavior conflicts with a convention used by the theory/family.
*/
virtual app * mk_eq_atom(expr * lhs, expr * rhs) {
ast_manager& m = get_manager();
if (lhs->get_id() > rhs->get_id())
std::swap(lhs, rhs);
if (m.are_distinct(lhs, rhs))
return m.mk_false();
if (m.are_equal(lhs, rhs))
return m.mk_true();
return get_manager().mk_eq(lhs, rhs);
}