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fix #5726

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This commit is contained in:
Nikolaj Bjorner 2021-12-20 09:21:40 -08:00
parent 9c8800bdde
commit 83b47f1859
1 changed files with 14 additions and 6 deletions
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20
src/ast/ast_util.cpp
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@ -261,14 +261,17 @@ void flatten_and(expr_ref_vector& result) {
ast_manager& m = result.get_manager();
expr* e1, *e2, *e3;
expr_fast_mark1 seen;
expr_ref_vector pin(m);
for (unsigned i = 0; i < result.size(); ++i) {
expr* e = result.get(i);
if (seen.is_marked(e))
continue;
seen.mark(e);
pin.push_back(e);
if (m.is_and(e)) {
app* a = to_app(e);
for (expr* arg : *a) result.push_back(arg);
for (expr* arg : *a)
result.push_back(arg);
result[i] = result.back();
result.pop_back();
--i;
@ -279,14 +282,15 @@ void flatten_and(expr_ref_vector& result) {
}
else if (m.is_not(e, e1) && m.is_or(e1)) {
app* a = to_app(e1);
for (expr* arg : *a) result.push_back(m.mk_not(arg));
for (expr* arg : *a)
result.push_back(mk_not(m, arg));
result[i] = result.back();
result.pop_back();
--i;
}
else if (m.is_not(e, e1) && m.is_implies(e1, e2, e3)) {
result.push_back(e2);
result[i] = m.mk_not(e3);
result[i] = mk_not(m, e3);
--i;
}
else if (m.is_true(e) ||
@ -323,14 +327,17 @@ void flatten_or(expr_ref_vector& result) {
ast_manager& m = result.get_manager();
expr* e1, *e2, *e3;
expr_fast_mark1 seen;
expr_ref_vector pin(m);
for (unsigned i = 0; i < result.size(); ++i) {
expr* e = result.get(i);
if (seen.is_marked(e))
continue;
seen.mark(e);
pin.push_back(e);
if (m.is_or(e)) {
app* a = to_app(e);
for (expr* arg : *a) result.push_back(arg);
for (expr* arg : *a)
result.push_back(arg);
result[i] = result.back();
result.pop_back();
--i;
@ -341,14 +348,15 @@ void flatten_or(expr_ref_vector& result) {
}
else if (m.is_not(e, e1) && m.is_and(e1)) {
app* a = to_app(e1);
for (expr* arg : *a) result.push_back(m.mk_not(arg));
for (expr* arg : *a)
result.push_back(mk_not(m, arg));
result[i] = result.back();
result.pop_back();
--i;
}
else if (m.is_implies(e,e2,e3)) {
result.push_back(e3);
result[i] = m.mk_not(e2);
result[i] = mk_not(m, e2);
--i;
}
else if (m.is_false(e) ||