mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-06 17:44:08 +00:00
Code Activity

fix bugs with tracking premises in user propagator in sat/smt

Browse source
This commit is contained in:
Nikolaj Bjorner 2024-05-31 11:25:00 +04:00
parent 904a50fe49
commit c0a7af4420
2 changed files with 24 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
src/sat/smt/user_solver.cpp
View file

@ -39,8 +39,10 @@ namespace user_solver {
ctx.attach_th_var(n, this, v);
expr_ref r(m);
sat::literal_vector explain;
if (ctx.is_fixed(n, r, explain))
if (ctx.is_fixed(n, r, explain)) {
m_prop.push_back(prop_info(explain, v, r));
DEBUG_CODE(for (auto lit : explain) VERIFY(s().value(lit) == l_true););
}
}
bool solver::propagate_cb(
@ -90,8 +92,20 @@ namespace user_solver {
if (!m_fixed_eh)
return;
force_push();
if (m_fixed.contains(v))
return;
m_fixed.insert(v);
ctx.push(insert_map<uint_set, unsigned>(m_fixed, v));
m_id2justification.setx(v, sat::literal_vector(num_lits, jlits), sat::literal_vector());
m_fixed_eh(m_user_context, this, var2expr(v), value);
for (unsigned i = 0; i < num_lits; ++i)
if (s().value(m_id2justification[v][i]) == l_false)
m_id2justification[v][i].neg();
try {
m_fixed_eh(m_user_context, this, var2expr(v), value);
}
catch (...) {
throw default_exception("Exception thrown in \"fixed\"-callback");
}
}
bool solver::decide(sat::bool_var& var, lbool& phase) {
@ -179,9 +193,9 @@ namespace user_solver {
sat::literal lit = ctx.internalize(prop.m_conseq, false, false);
if (s().value(lit) != l_true) {
auto j = mk_justification(m_qhead);
persist_clause(lit, j);
s().assign(lit, j);
++m_stats.m_num_propagations;
persist_clause(lit, j);
}
}
@ -193,7 +207,7 @@ namespace user_solver {
if (m_qhead == m_prop.size() && m_replay_qhead == m_clauses_to_replay.size())
return false;
force_push();
bool replayed = false;
if (m_replay_qhead < m_clauses_to_replay.size()) {
replayed = true;
@ -235,11 +249,15 @@ namespace user_solver {
clause.push_back(ctx.literal2expr(~lit));
for (auto const& [a,b] : prop.m_eqs)
clause.push_back(m.mk_not(m.mk_eq(a, b)));
clause.push_back(ctx.literal2expr(lit));
if (m.is_false(clause.back()))
clause.pop_back();
m_clauses_to_replay.push_back(clause);
if (m_replay_qhead + 1 < m_clauses_to_replay.size())
std::swap(m_clauses_to_replay[m_replay_qhead], m_clauses_to_replay[m_clauses_to_replay.size()-1]);
ctx.push(value_trail<unsigned>(m_replay_qhead));
++m_replay_qhead;
}
@ -260,6 +278,7 @@ namespace user_solver {
auto const& prop = m_prop[j.m_propagation_index];
for (unsigned id : prop.m_ids)
r.append(m_id2justification[id]);
DEBUG_CODE(for (auto lit : r) VERIFY(s().value(lit) == l_true););
for (auto const& p : prop.m_eqs)
ctx.add_eq_antecedent(probing, expr2enode(p.first), expr2enode(p.second));
}

1
src/sat/smt/user_solver.h
View file

@ -79,6 +79,7 @@ namespace user_solver {
lbool m_next_split_phase = l_undef;
vector<expr_ref_vector> m_clauses_to_replay;
unsigned m_replay_qhead = 0;
uint_set m_fixed;
struct justification {
unsigned m_propagation_index { 0 };