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address some crashes reported by Caleb

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-06-20 18:35:16 -07:00
parent 6524a70c32
commit 02f34ea4b1
3 changed files with 8 additions and 4 deletions
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3
src/smt/seq_regex.cpp
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@ -525,7 +525,8 @@ namespace smt {
lits.reset();
lits.push_back(~lit);
if (!m.is_true(cond)) {
lits.push_back(th.mk_literal(mk_forall(m, hd, mk_not(m, cond))));
expr_ref ncond(mk_not(m, cond), m);
lits.push_back(th.mk_literal(mk_forall(m, hd, ncond)));
}
expr_ref is_empty1 = sk().mk_is_empty(p.second, re().mk_union(u, r));
lits.push_back(th.mk_literal(is_empty1));

2
src/smt/smt_theory.cpp
View file

@ -128,7 +128,7 @@ namespace smt {
enode* theory::ensure_enode(expr* e) {
if (!ctx.e_internalized(e)) {
ctx.internalize(e, false);
ctx.internalize(e, is_quantifier(e));
}
enode* n = ctx.get_enode(e);
ctx.mark_as_relevant(n);

7
src/smt/theory_seq.cpp
View file

@ -720,7 +720,7 @@ bool theory_seq::is_solved() {
}
#if 0
// debug code
// debug code
for (enode* n : ctx.enodes()) {
expr* e = nullptr;
rational len1, len2;
@ -2881,8 +2881,11 @@ literal theory_seq::mk_simplified_literal(expr * _e) {
literal theory_seq::mk_literal(expr* _e) {
expr_ref e(_e, m);
bool is_not = m.is_not(_e, _e);
ensure_enode(_e);
if (!ctx.e_internalized(_e)) {
ctx.internalize(_e, is_quantifier(_e));
}
literal lit = ctx.get_literal(_e);
ctx.mark_as_relevant(lit);
if (is_not) lit.neg();
return lit;
}