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change to expr_ref to allow trying simplification

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This commit is contained in:
Nikolaj Bjorner 2023-11-08 13:50:48 +01:00
parent bd4d580b17
commit 0556059bdf
1 changed files with 7 additions and 7 deletions
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14
src/smt/theory_lra.cpp
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@ -1730,13 +1730,13 @@ public:
}
}
// create a bound atom representing term >= k is lower_bound is true, and term <= k if it is false
app_ref mk_bound(lp::lar_term const& term, rational const& k, bool lower_bound) {
expr_ref mk_bound(lp::lar_term const& term, rational const& k, bool lower_bound) {
rational offset;
expr_ref t(m);
return mk_bound(term, k, lower_bound, offset, t);
}
app_ref mk_bound(lp::lar_term const& term, rational const& k, bool lower_bound, rational& offset, expr_ref& t) {
expr_ref mk_bound(lp::lar_term const& term, rational const& k, bool lower_bound, rational& offset, expr_ref& t) {
offset = k;
u_map<rational> coeffs;
term2coeffs(term, coeffs);
@ -1782,7 +1782,7 @@ public:
// lp().print_term(term, tout << "term: ") << "\n";
// tout << "offset: " << offset << " gcd: " << g << "\n";);
app_ref atom(m);
expr_ref atom(m);
t = coeffs2app(coeffs, rational::zero(), is_int);
if (lower_bound) {
atom = a.mk_ge(t, a.mk_numeral(offset, is_int));
@ -1791,6 +1791,7 @@ public:
atom = a.mk_le(t, a.mk_numeral(offset, is_int));
}
// ctx().get_rewriter()(atom);
TRACE("arith", tout << t << ": " << atom << "\n";
lp().print_term(term, tout << "bound atom: ") << (lower_bound?" >= ":" <= ") << k << "\n";);
ctx().internalize(atom, true);
@ -1920,12 +1921,11 @@ public:
case lp::lia_move::branch: {
TRACE("arith", tout << "branch\n";);
app_ref b(m);
bool u = m_lia->is_upper();
auto const & k = m_lia->get_offset();
rational offset;
expr_ref t(m);
b = mk_bound(m_lia->get_term(), k, !u, offset, t);
expr_ref b = mk_bound(m_lia->get_term(), k, !u, offset, t);
if (m.has_trace_stream()) {
app_ref body(m);
body = m.mk_or(b, m.mk_not(b));
@ -1953,7 +1953,7 @@ public:
}
// The call mk_bound() can set the m_infeasible_column in lar_solver
// so the explanation is safer to take before this call.
expr_ref b(mk_bound(m_lia->get_term(), m_lia->get_offset(), !m_lia->is_upper()), m);
expr_ref b = mk_bound(m_lia->get_term(), m_lia->get_offset(), !m_lia->is_upper());
if (m.has_trace_stream()) {
th.log_axiom_instantiation(b);
m.trace_stream() << "[end-of-instance]\n";
@ -2000,7 +2000,7 @@ public:
default: UNREACHABLE();
}
TRACE("arith", tout << "is_lower: " << is_lower << " pos " << pos << "\n";);
app_ref atom(m);
expr_ref atom(m);
// TBD utility: lp::lar_term term = mk_term(ineq.m_poly);
// then term is used instead of ineq.m_term
if (is_eq)