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work on proof checking

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- add outline of trim routine
- streamline how proof terms are checked and how residue units are extracted.
This commit is contained in:
Nikolaj Bjorner 2022-09-30 13:04:19 -04:00
parent ccda49bad5
commit b9cba82531
10 changed files with 384 additions and 109 deletions
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14
src/sat/smt/arith_diagnostics.cpp
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@ -129,14 +129,16 @@ namespace arith {
return nullptr;
m_arith_hint.set_type(ctx, hint_type::implied_eq_h);
explain_assumptions();
m_arith_hint.set_num_le(1); // TODO
m_arith_hint.add_diseq(a, b);
return m_arith_hint.mk(ctx);
}
arith_proof_hint const* solver::explain_triangle_eq(sat::literal le, sat::literal ge, sat::literal eq) {
arith_proof_hint const* solver::explain_trichotomy(sat::literal le, sat::literal ge, sat::literal eq) {
if (!ctx.use_drat())
return nullptr;
m_arith_hint.set_type(ctx, hint_type::implied_eq_h);
m_arith_hint.set_num_le(1);
m_arith_hint.add_lit(rational(1), le);
m_arith_hint.add_lit(rational(1), ge);
m_arith_hint.add_lit(rational(1), ~eq);
@ -149,6 +151,9 @@ namespace arith {
arith_util arith(m);
solver& a = dynamic_cast<solver&>(*s.fid2solver(fid));
char const* name;
expr_ref_vector args(m);
sort_ref_vector sorts(m);
switch (m_ty) {
case hint_type::farkas_h:
name = "farkas";
@ -158,15 +163,14 @@ namespace arith {
break;
case hint_type::implied_eq_h:
name = "implied-eq";
args.push_back(arith.mk_int(m_num_le));
break;
}
rational lc(1);
for (unsigned i = m_lit_head; i < m_lit_tail; ++i)
lc = lcm(lc, denominator(a.m_arith_hint.lit(i).first));
expr_ref_vector args(m);
sort_ref_vector sorts(m);
for (unsigned i = m_lit_head; i < m_lit_tail; ++i) {
for (unsigned i = m_lit_head; i < m_lit_tail; ++i) {
auto const& [coeff, lit] = a.m_arith_hint.lit(i);
args.push_back(arith.mk_int(abs(coeff*lc)));
args.push_back(s.literal2expr(lit));