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fix #3809

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-07 11:15:34 -07:00
parent 8dac9b7b94
commit b66360d0b5
5 changed files with 84 additions and 107 deletions
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12
src/muz/spacer/spacer_context.cpp
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@ -2924,12 +2924,12 @@ expr_ref context::get_ground_sat_answer() const {
<< "Sat answer unavailable when result is false\n";);
return expr_ref(m);
}
// convert a ground refutation into a linear counterexample
// only works for linear CHC systems
expr_ref_vector cex(m);
proof_ref pf = get_ground_refutation();
proof_ref_vector premises(m);
expr_ref conclusion(m);
svector<std::pair<unsigned, unsigned>> positions;
@ -2946,18 +2946,18 @@ expr_ref context::get_ground_sat_answer() const {
} else {
pf.reset();
break;
}
}
premises.reset();
conclusion.reset();
positions.reset();
substs.reset();
}
}
SASSERT(!pf || !m.is_hyper_resolve(pf));
if (pf) {
cex.push_back(m.get_fact(pf));
}
TRACE ("spacer", tout << "ground cex\n" << cex << "\n";);
return mk_and(cex);