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unsat core

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This commit is contained in:
Jakob Rath 2022-03-18 15:49:44 +01:00
parent 509a007ed7
commit fd353bff17
3 changed files with 11 additions and 2 deletions
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2
src/math/polysat/solver.cpp
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@ -518,7 +518,7 @@ namespace polysat {
break;
case dd::find_t::empty:
m_free_pvars.unassign_var_eh(v);
// TODO: get unsat core from univariate solver
auto core = m_viable_fallback.unsat_core(v); // TODO: add constraints from unsat_core to conflict
set_conflict(v);
return;
}

9
src/math/polysat/viable.cpp
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@ -791,5 +791,14 @@ namespace polysat {
return dd::find_t::empty;
}
}
signed_constraints viable_fallback::unsat_core(pvar v) {
signed_constraints cs;
for (unsigned dep : m_usolver[v]->unsat_core()) {
cs.push_back(m_constraints[v][dep]);
}
return cs;
}
}

2
src/math/polysat/viable.h
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@ -211,7 +211,7 @@ namespace polysat {
// bool check_value(pvar v, rational const& val);
dd::find_t find_viable(pvar v, rational& out_val);
// TODO: get unsat core
signed_constraints unsat_core(pvar v);
};
}