mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-23 17:15:31 +00:00
Code Activity

fix #2643 - fuzzers are here to get you @lorisdanton

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-10-12 18:19:13 -07:00
parent cc26d49060
commit a921b4ff4a
2 changed files with 10 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/math/automata/symbolic_automata_def.h
View file

@ -381,11 +381,14 @@ typename symbolic_automata<T, M>::automaton_t* symbolic_automata<T, M>::mk_produ
unsigned_vector final;
unsigned_vector a_init, b_init;
a.get_epsilon_closure(a.init(), a_init);
bool a_init_is_final = false, b_init_is_final = false;
for (unsigned ia : a_init) {
if (a.is_final_state(ia)) {
a_init_is_final = true;
b.get_epsilon_closure(b.init(), b_init);
for (unsigned ib : b_init) {
if (b.is_final_state(ib)) {
b_init_is_final = true;
final.push_back(0);
break;
}
@ -438,8 +441,8 @@ typename symbolic_automata<T, M>::automaton_t* symbolic_automata<T, M>::mk_produ
}
svector<bool> back_reachable(n, false);
for (unsigned i = 0; i < final.size(); ++i) {
back_reachable[final[i]] = true;
for (unsigned f : final) {
back_reachable[f] = true;
}
unsigned_vector stack(final);
@ -464,7 +467,7 @@ typename symbolic_automata<T, M>::automaton_t* symbolic_automata<T, M>::mk_produ
}
}
if (mvs1.empty()) {
if (a.is_final_state(a.init()) && b.is_final_state(b.init())) {
if (a_init_is_final && b_init_is_final) {
// special case: automaton has no moves, but the initial state is final on both sides
// this results in the automaton which accepts the empty sequence and nothing else
final.clear();