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fix is-unit test in seq rewriter

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-21 17:08:33 -08:00
parent 0c1408b30e
commit 7b2590c026
2 changed files with 40 additions and 23 deletions
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32
src/ast/rewriter/seq_rewriter.cpp
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@ -677,8 +677,22 @@ br_status seq_rewriter::mk_seq_contains(expr* a, expr* b, expr_ref& result) {
}
// check if subsequence of a is in b.
expr_ref_vector as(m()), bs(m());
m_util.str.get_concat(a, as);
m_util.str.get_concat(b, bs);
if (m_util.str.is_string(a, c)) {
for (unsigned i = 0; i < c.length(); ++i) {
as.push_back(m_util.str.mk_unit(m_util.str.mk_char(c, i)));
}
}
else {
m_util.str.get_concat(a, as);
}
if (m_util.str.is_string(b, d)) {
for (unsigned i = 0; i < d.length(); ++i) {
bs.push_back(m_util.str.mk_unit(m_util.str.mk_char(d, i)));
}
}
else {
m_util.str.get_concat(b, bs);
}
bool all_values = true;
TRACE("seq", tout << mk_pp(a, m()) << " contains " << mk_pp(b, m()) << "\n";);
@ -719,7 +733,6 @@ br_status seq_rewriter::mk_seq_contains(expr* a, expr* b, expr_ref& result) {
}
}
if (as.empty()) {
result = m().mk_eq(b, m_util.str.mk_empty(m().get_sort(b)));
return BR_REWRITE2;
@ -755,14 +768,10 @@ br_status seq_rewriter::mk_seq_contains(expr* a, expr* b, expr_ref& result) {
result = m().mk_true();
return BR_DONE;
}
bool all_units = true;
for (unsigned i = 0; i < bs.size(); ++i) {
all_units = m_util.str.is_unit(bs[i].get());
}
for (unsigned i = 0; i < as.size(); ++i) {
all_units = m_util.str.is_unit(as[i].get());
}
if (all_units) {
std::function<bool(expr*)> is_unit = [&](expr *e) { return m_util.str.is_unit(e); };
if (bs.forall(is_unit) && as.forall(is_unit)) {
if (as.size() < bs.size()) {
result = m().mk_false();
return BR_DONE;
@ -1595,6 +1604,7 @@ br_status seq_rewriter::mk_eq_core(expr * l, expr * r, expr_ref & result) {
return BR_REWRITE3;
}
bool seq_rewriter::reduce_eq(expr_ref_vector& ls, expr_ref_vector& rs, expr_ref_vector& lhs, expr_ref_vector& rhs, bool& change) {
expr* a, *b;
zstring s;