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fix bug in definition of rewrite rule for replace, tighten constraints for tightest-prefix

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-23 18:41:56 -08:00
parent 12458b1a84
commit d5383e2387
3 changed files with 15 additions and 11 deletions
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9
src/ast/rewriter/seq_rewriter.cpp
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@ -444,11 +444,12 @@ br_status seq_rewriter::mk_seq_contains(expr* a, expr* b, expr_ref& result) {
bool found = false;
for (unsigned i = 0; !found && i < as.size(); ++i) {
if (bs.size() > as.size() - i) break;
all_values &= m().is_value(as[i].get());
unsigned j = 0;
for (; j < bs.size() && as[j+i].get() == bs[j].get(); ++j) {};
found = j == bs.size();
if (bs.size() <= as.size() - i) {
unsigned j = 0;
for (; j < bs.size() && as[j+i].get() == bs[j].get(); ++j) {};
found = j == bs.size();
}
}
if (found) {
result = m().mk_true();