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https://github.com/Z3Prover/z3
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@ -563,18 +563,15 @@ bool core::var_is_fixed(lpvar j) const {
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bool core::var_is_free(lpvar j) const {
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return lra.column_is_free(j);
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}
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std::ostream & core::print_ineq(const ineq & in, std::ostream & out) const {
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lra.print_term_as_indices(in.term(), out);
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out << " " << lconstraint_kind_string(in.cmp()) << " " << in.rs();
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return out;
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return out << " " << lconstraint_kind_string(in.cmp()) << " " << in.rs();
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}
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std::ostream & core::print_var(lpvar j, std::ostream & out) const {
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if (is_monic_var(j)) {
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if (is_monic_var(j))
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print_monic(m_emons[j], out);
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}
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lra.print_column_info(j, out);
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signed_var jr = m_evars.find(j);
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@ -1524,9 +1521,11 @@ void core::add_bounds() {
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lpvar i = m_to_refine[(k + r) % sz];
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auto const& m = m_emons[i];
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for (lpvar j : m.vars()) {
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if (!var_is_free(j)) continue;
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if (!var_is_free(j))
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continue;
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// split the free variable (j <= 0, or j > 0), and return
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m_literals.push_back(ineq(j, lp::lconstraint_kind::EQ, rational::zero()));
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m_literals.push_back(ineq(j, lp::lconstraint_kind::EQ, rational::zero()));
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TRACE("nla_solver", print_ineq(m_literals.back(), tout) << "\n");
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++lp_settings().stats().m_nla_add_bounds;
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return;
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}
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@ -1443,7 +1443,6 @@ namespace arith {
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case lp::NE: is_eq = true; sign = true; break;
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default: UNREACHABLE();
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}
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TRACE("arith", tout << "is_lower: " << is_lower << " sign " << sign << "\n";);
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// TBD utility: lp::lar_term term = mk_term(ineq.m_poly);
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// then term is used instead of ineq.m_term
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sat::literal lit;
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@ -1452,6 +1451,7 @@ namespace arith {
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else
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lit = ctx.expr2literal(mk_bound(ineq.term(), ineq.rs(), is_lower));
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TRACE("arith", tout << "is_lower: " << is_lower << " sign " << sign << " " << ctx.literal2expr(lit) << "\n";);
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return sign ? ~lit : lit;
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}
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@ -1488,6 +1488,14 @@ namespace arith {
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auto lit = mk_ineq_literal(ineq);
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ctx.mark_relevant(lit);
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s().set_phase(lit);
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// force trichotomy axiom for equality literals
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if (ineq.cmp() == lp::EQ) {
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nla::lemma l;
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l.push_back(ineq);
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l.push_back(nla::ineq(lp::LT, ineq.term(), ineq.rs()));
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l.push_back(nla::ineq(lp::GT, ineq.term(), ineq.rs()));
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false_case_of_check_nla(l);
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}
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}
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for (const nla::lemma& l : m_nla->lemmas())
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false_case_of_check_nla(l);
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