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bug fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-10-27 05:51:42 +01:00
parent c832802183
commit d847a28589
10 changed files with 118 additions and 76 deletions
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20
src/ast/rewriter/finite_set_axioms.cpp
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@ -27,7 +27,10 @@ Revision History:
std::ostream& operator<<(std::ostream& out, theory_axiom const& ax) {
return out << "axiom";
auto &m = ax.clause.get_manager();
for (auto e : ax.clause)
out << mk_pp(e, m) << " ";
return out;
}
// a ~ set.empty => not (x in a)
@ -36,7 +39,8 @@ void finite_set_axioms::in_empty_axiom(expr *x) {
// Generate: not (x in empty_set)
// where empty_set is the empty set of x's type
sort* elem_sort = x->get_sort();
expr_ref empty_set(u.mk_empty(elem_sort), m);
sort *set_sort = u.mk_finite_set_sort(elem_sort);
expr_ref empty_set(u.mk_empty(set_sort), m);
expr_ref x_in_empty(u.mk_in(x, empty_set), m);
theory_axiom* ax = alloc(theory_axiom, m, "in-empty", x);
@ -357,7 +361,7 @@ void finite_set_axioms::subset_axiom(expr* a) {
void finite_set_axioms::extensionality_axiom(expr *a, expr* b) {
// a != b => set.in (set.diff(a, b) a) != set.in (set.diff(a, b) b)
expr_ref diff_ab(u.mk_difference(a, b), m);
expr_ref diff_ab(u.mk_ext(a, b), m);
expr_ref a_eq_b(m.mk_eq(a, b), m);
expr_ref diff_in_a(u.mk_in(diff_ab, a), m);
@ -370,9 +374,9 @@ void finite_set_axioms::extensionality_axiom(expr *a, expr* b) {
ax->clause.push_back(m.mk_not(diff_in_b));
m_add_clause(ax);
theory_axiom* ax2 = alloc(theory_axiom, m, "extensionality", a, b);
ax2->clause.push_back(m.mk_not(a_eq_b));
ax2->clause.push_back(diff_in_a);
ax2->clause.push_back(diff_in_b);
m_add_clause(ax2);
ax = alloc(theory_axiom, m, "extensionality", a, b);
ax->clause.push_back(a_eq_b);
ax->clause.push_back(diff_in_a);
ax->clause.push_back(diff_in_b);
m_add_clause(ax);
}