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add facility to experiment with nla justified conflicts from Grobner equations

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-10-16 00:40:24 -07:00
parent bdac86501d
commit 18fc6914d3
3 changed files with 38 additions and 12 deletions
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40
src/math/lp/nla_grobner.cpp
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@ -36,7 +36,7 @@ namespace nla {
if (m_quota == 0)
m_quota = c().params().arith_nl_gr_q();
if (m_quota == 1)
if (false && m_quota == 1)
return;
lp_settings().stats().m_grobner_calls++;
@ -316,7 +316,11 @@ namespace nla {
c().m_intervals.display(tout << "j" << j << " ", a); tout << " ";
}
tout << "\n");
#if 0
if (add_nla_conflict(e))
return true;
#endif
return false;
}
eval.get_interval<dd::w_dep::with_deps>(e.poly(), i_wd);
@ -329,6 +333,10 @@ namespace nla {
return true;
}
else {
#if 0
if (add_nla_conflict(e))
return true;
#endif
TRACE("grobner", m_solver.display(tout << "no conflict ", e) << "\n");
return false;
}
@ -567,14 +575,30 @@ namespace nla {
tout << "\n");
}
void grobner::check_missing_propagation(const dd::solver::equation& e) {
bool grobner::is_nla_conflict(const dd::solver::equation& eq) {
vector<dd::pdd> eqs;
eqs.push_back(e.poly());
lbool r = c().m_nra.check(eqs);
CTRACE("grobner", r == l_false, m_solver.display(tout << "missed conflict ", e););
if (r != l_true)
eqs.push_back(eq.poly());
return l_false == c().m_nra.check(eqs);
}
bool grobner::add_nla_conflict(const dd::solver::equation& eq) {
if (is_nla_conflict(eq)) {
new_lemma lemma(m_core,"nla-conflict");
lp::explanation exp;
explain(eq, exp);
lemma &= exp;
return true;
}
return false;
}
void grobner::check_missing_propagation(const dd::solver::equation& e) {
bool is_confl = is_nla_conflict(e);
CTRACE("grobner", is_confl, m_solver.display(tout << "missed conflict ", e););
if (is_confl)
return;
r = c().m_nra.check_tight(e.poly());
lbool r = c().m_nra.check_tight(e.poly());
CTRACE("grobner", r == l_false, m_solver.display(tout << "tight equality ", e););
}