mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-24 01:25:31 +00:00
Code Activity

fix #3930

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-16 16:11:00 -07:00
parent dd3e574f81
commit 19f655c693
4 changed files with 27 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/smt/theory_seq.cpp
View file

@ -3918,6 +3918,8 @@ void theory_seq::add_itos_axiom(expr* e) {
add_axiom(eq1, ge0);
add_axiom(mk_literal(m_autil.mk_ge(mk_len(e), m_autil.mk_int(0))));
// n >= 0 => stoi(itos(n)) = n
app_ref stoi(m_util.str.mk_stoi(e), m);
@ -3954,7 +3956,8 @@ bool theory_seq::add_itos_val_axiom(expr* e) {
}
add_length_to_eqc(e);
if (get_length(e, val) && val.is_pos() && val.is_unsigned() && (!m_si_axioms.find(e, val2) || val != val2)) {
if (get_length(e, val) && val.is_pos() && val.is_unsigned() &&
(!m_si_axioms.find(e, val2) || val != val2)) {
add_si_axiom(e, n, val.get_unsigned());
m_si_axioms.insert(e, val);
m_trail_stack.push(push_replay(alloc(replay_is_axiom, m, e)));
@ -3977,7 +3980,8 @@ bool theory_seq::add_stoi_val_axiom(expr* e) {
}
add_length_to_eqc(n);
if (get_length(n, val) && val.is_pos() && val.is_unsigned() && (!m_si_axioms.find(e, val2) || val2 != val)) {
if (get_length(n, val) && val.is_pos() && val.is_unsigned() &&
(!m_si_axioms.find(e, val2) || val2 != val)) {
add_si_axiom(n, e, val.get_unsigned());
m_si_axioms.insert(e, val);
m_trail_stack.push(push_replay(alloc(replay_is_axiom, m, e)));
@ -4013,6 +4017,7 @@ expr_ref theory_seq::digit2int(expr* ch) {
// 10^k <= n < 10^{k+1}-1 => len(e) => k
void theory_seq::add_si_axiom(expr* e, expr* n, unsigned k) {
context& ctx = get_context();
zstring s;
expr_ref ith_char(m), num(m), coeff(m);