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Several changes:

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- Extend fixed-bit FI to both directions
- really randomized restart
- MSB for fixed-bits
- Forward propagation (band, lshift, rshift) with good justifications (strengthen during saturation)
This commit is contained in:
Clemens Eisenhofer 2023-03-07 15:21:14 +01:00
parent 5a8c0ce9c0
commit 5b35450891
18 changed files with 539 additions and 1588 deletions
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5
src/math/polysat/op_constraint.h
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@ -60,15 +60,12 @@ namespace polysat {
clause_ref lemma_lshr(solver& s, assignment const& a);
static lbool eval_lshr(pdd const& p, pdd const& q, pdd const& r);
bool propagate_bits_lshr(solver& s, bool is_positive);
clause_ref lemma_shl(solver& s, assignment const& a);
static lbool eval_shl(pdd const& p, pdd const& q, pdd const& r);
bool propagate_bits_shl(solver& s, bool is_positive);
clause_ref lemma_and(solver& s, assignment const& a);
static lbool eval_and(pdd const& p, pdd const& q, pdd const& r);
bool propagate_bits_and(solver& s, bool is_positive);
clause_ref lemma_inv(solver& s, assignment const& a);
static lbool eval_inv(pdd const& p, pdd const& r);
@ -91,12 +88,12 @@ namespace polysat {
pdd const& p() const { return m_p; }
pdd const& q() const { return m_q; }
pdd const& r() const { return m_r; }
code get_op() const { return m_op; }
std::ostream& display(std::ostream& out, lbool status) const override;
std::ostream& display(std::ostream& out) const override;
lbool eval() const override;
lbool eval(assignment const& a) const override;
void narrow(solver& s, bool is_positive, bool first) override;
bool propagate_bits(solver& s, bool is_positive) override;
virtual clause_ref produce_lemma(solver& s, assignment const& a, bool is_positive) override;
unsigned hash() const override;
bool operator==(constraint const& other) const override;