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https://github.com/Z3Prover/z3
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fix variable tracking bug in explanations with literals
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@ -167,7 +167,7 @@ namespace euf {
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lit = lit2;
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}
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TRACE("euf", tout << "attach " << v << " " << mk_bounded_pp(e, m) << "\n";);
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TRACE("euf", tout << "attach v" << v << " " << mk_bounded_pp(e, m) << "\n";);
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m_bool_var2expr.reserve(v + 1, nullptr);
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if (m_bool_var2expr[v] && m_egraph.find(e)) {
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if (m_egraph.find(e)->bool_var() != v) {
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@ -83,10 +83,11 @@ namespace euf {
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expr_ref_vector eqs(m);
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unsigned nv = s().num_vars();
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auto add_lit = [&](enode_pair const& eq) {
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unsigned v = nv;
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++nv;
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eqs.push_back(m.mk_eq(eq.first->get_expr(), eq.second->get_expr()));
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set_tmp_bool_var(nv, eqs.back());
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return literal(nv, false);
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set_tmp_bool_var(v, eqs.back());
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return literal(v, false);
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};
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for (auto lit : euf::th_explain::lits(jst))
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