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Separate constraint creation from activation; add sign/polarity to constraints (#5217)

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* Separate constraint creation from activation

* Basic recursive handling of disjunctive lemmas for unit tests

* Set learned constraint to true immediately

* Preliminary support for negated constraints
This commit is contained in:
Jakob Rath 2021-04-26 18:55:58 +02:00 • committed by GitHub
parent 2fac9e6e66
commit 9e505d60f0
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GPG key ID: 4AEE18F83AFDEB23
12 changed files with 244 additions and 73 deletions
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7
src/math/polysat/ule_constraint.h
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@ -21,8 +21,8 @@ namespace polysat {
pdd m_lhs;
pdd m_rhs;
public:
ule_constraint(unsigned lvl, pdd const& l, pdd const& r, p_dependency_ref& dep):
constraint(lvl, dep, ckind_t::ule_t), m_lhs(l), m_rhs(r) {
ule_constraint(unsigned lvl, bool_var bvar, csign_t sign, pdd const& l, pdd const& r, p_dependency_ref& dep):
constraint(lvl, bvar, sign, dep, ckind_t::ule_t), m_lhs(l), m_rhs(r) {
m_vars.append(l.free_vars());
for (auto v : r.free_vars())
if (!m_vars.contains(v))
@ -34,9 +34,10 @@ namespace polysat {
std::ostream& display(std::ostream& out) const override;
bool propagate(solver& s, pvar v) override;
constraint* resolve(solver& s, pvar v) override;
static bool is_always_false(pdd const& lhs, pdd const& rhs);
bool is_always_false(pdd const& lhs, pdd const& rhs);
bool is_always_false() override;
bool is_currently_false(solver& s) override;
bool is_currently_true(solver& s) override;
void narrow(solver& s) override;
};