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https://github.com/Z3Prover/z3
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bug in flatten/and/or introduced when skipping sub-expressions
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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4b5ee91b44
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@ -264,8 +264,12 @@ void flatten_and(expr_ref_vector& result) {
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expr_fast_mark1 seen;
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for (unsigned i = 0; i < result.size(); ++i) {
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expr* e = result.get(i);
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if (seen.is_marked(e))
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if (seen.is_marked(e)) {
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result[i] = result.back();
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result.pop_back();
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--i;
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continue;
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}
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seen.mark(e);
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pin.push_back(e);
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if (m.is_and(e)) {
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@ -330,8 +334,12 @@ void flatten_or(expr_ref_vector& result) {
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expr_fast_mark1 seen;
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for (unsigned i = 0; i < result.size(); ++i) {
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expr* e = result.get(i);
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if (seen.is_marked(e))
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if (seen.is_marked(e)) {
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result[i] = result.back();
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result.pop_back();
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--i;
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continue;
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}
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seen.mark(e);
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pin.push_back(e);
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if (m.is_or(e)) {
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