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Try to evaluate constraints whenever one of its variables is changed

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This commit is contained in:
Jakob Rath 2023-03-17 22:19:46 +01:00
parent f82f18efda
commit 526a55f116
2 changed files with 40 additions and 1 deletions
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18
src/math/polysat/solver.h
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@ -196,14 +196,32 @@ namespace polysat {
unsigned_vector m_base_levels; // External clients can push/pop scope.
// Cache literals that evaluate to true in the current assignment.
// TODO: convert to proper pvalue caching. decouple trail from qhead. push size on trail when a pvar is assigned, because that's the point where evaluations can change.
sat::literal_set m_ptrue_lits;
sat::literal_vector m_ptrue_lits_trail;
unsigned_vector m_ptrue_lits_size_trail;
void push_qhead() {
m_trail.push_back(trail_instr_t::qhead_i);
m_qhead_trail.push_back(m_qhead);
//
SASSERT(m_ptrue_lits.size() == m_ptrue_lits_trail.size());
m_ptrue_lits_size_trail.push_back(m_ptrue_lits_trail.size());
}
void pop_qhead() {
m_qhead = m_qhead_trail.back();
m_qhead_trail.pop_back();
//
unsigned sz = m_ptrue_lits_size_trail.back();
m_ptrue_lits_size_trail.pop_back();
while (m_ptrue_lits_trail.size() > sz) {
sat::literal lit = m_ptrue_lits_trail.back();
m_ptrue_lits.remove(lit);
m_ptrue_lits_trail.pop_back();
}
SASSERT(m_ptrue_lits.size() == m_ptrue_lits_trail.size());
}
unsigned size(pvar v) const { return m_size[v]; }