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fix bug in new core not detecting conflict, fix #6525, add tactic doc

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-01-14 17:20:37 -05:00
parent feda706d0d
commit 4f7f4376b8
14 changed files with 175 additions and 26 deletions
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13
src/sat/smt/arith_diagnostics.cpp
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@ -124,6 +124,19 @@ namespace arith {
return m_arith_hint.mk(ctx);
}
arith_proof_hint const* solver::explain_conflict(sat::literal_vector const& core, euf::enode_pair_vector const& eqs) {
arith_proof_hint* hint = nullptr;
if (ctx.use_drat()) {
m_arith_hint.set_type(ctx, hint_type::farkas_h);
for (auto lit : core)
m_arith_hint.add_lit(rational::one(), lit);
for (auto const& [a,b] : eqs)
m_arith_hint.add_eq(a, b);
hint = m_arith_hint.mk(ctx);
}
return hint;
}
arith_proof_hint const* solver::explain_implied_eq(lp::explanation const& e, euf::enode* a, euf::enode* b) {
if (!ctx.use_drat())
return nullptr;