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add simplification rule to concatentations of regex to avoid stack overflow in derivatives of very long expressions

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-04-20 18:19:16 +02:00
parent 41412293fe
commit e172aa370d
2 changed files with 7 additions and 0 deletions
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2
src/smt/seq/seq_nielsen.cpp
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@ -1502,6 +1502,8 @@ namespace seq {
IF_VERBOSE(1, display(verbose_stream(), node));
CTRACE(seq, !ext, display(tout, node) << to_dot() << "\n");
if (!ext) {
std::cout << "No extensions generated for node " << node->id() << ", but not satisfied or conflict?!"
<< std::endl;
node->to_html(std::cout, m);
std::cout << std::endl;
display(std::cout, node);