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Polysat updates (#5524)

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* Move boolean resolution into conflict_core

* Move store() into dedup functionality

* comments

* Call gc()

* Add inference_engine sketch
This commit is contained in:
Jakob Rath 2021-08-31 17:16:45 +02:00 • committed by GitHub
parent d1118cb178
commit dde8fb0c37
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8 changed files with 172 additions and 92 deletions
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25
src/math/polysat/conflict_core.cpp
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@ -57,4 +57,29 @@ namespace polysat {
m_needs_model = true;
}
void conflict_core::resolve(sat::bool_var var, clause const& cl) {
// TODO: fix the implementation: should resolve the given clause with the current conflict core.
#if 0
DEBUG_CODE({
bool this_has_pos = std::count(begin(), end(), sat::literal(var)) > 0;
bool this_has_neg = std::count(begin(), end(), ~sat::literal(var)) > 0;
bool other_has_pos = std::count(other.begin(), other.end(), sat::literal(var)) > 0;
bool other_has_neg = std::count(other.begin(), other.end(), ~sat::literal(var)) > 0;
SASSERT(!this_has_pos || !this_has_neg); // otherwise this is tautology
SASSERT(!other_has_pos || !other_has_neg); // otherwise other is tautology
SASSERT((this_has_pos && other_has_neg) || (this_has_neg && other_has_pos));
});
// The resolved var should not be one of the new constraints
int j = 0;
for (auto lit : m_literals)
if (lit.var() != var)
m_literals[j++] = lit;
m_literals.shrink(j);
for (sat::literal lit : other)
if (lit.var() != var)
m_literals.push_back(lit);
return true;
#endif
}
}