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unit propagate with fingerprints

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This commit is contained in:
Nikolaj Bjorner 2021-10-04 20:01:46 -07:00
parent 8a85cfdb12
commit 281fb67d88
6 changed files with 50 additions and 37 deletions
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1
src/ast/euf/euf_egraph.cpp
View file

@ -681,6 +681,7 @@ namespace euf {
void egraph::begin_explain() {
SASSERT(m_todo.empty());
m_uses_congruence = false;
DEBUG_CODE(for (enode* n : m_nodes) SASSERT(!n->is_marked1()););
}
void egraph::end_explain() {

3
src/sat/smt/array_axioms.cpp
View file

@ -621,8 +621,7 @@ namespace array {
continue;
// arrays used as indices in other arrays have to be treated as shared issue #3532, #3529
if (ctx.is_shared(r) || is_shared_arg(r))
roots.push_back(r->get_th_var(get_id()));
roots.push_back(r->get_th_var(get_id()));
r->mark1();
to_unmark.push_back(r);
}

42
src/sat/smt/q_ematch.cpp
View file

@ -218,11 +218,17 @@ namespace q {
}
};
binding* ematch::alloc_binding(unsigned n, app* pat, unsigned max_generation, unsigned min_top, unsigned max_top) {
unsigned sz = sizeof(binding) + sizeof(euf::enode* const*)*n;
binding* ematch::alloc_binding(clause& c, app* pat, euf::enode* const* _binding, unsigned max_generation, unsigned min_top, unsigned max_top) {
unsigned n = c.num_decls();
unsigned sz = sizeof(binding) + sizeof(euf::enode* const*) * n;
void* mem = ctx.get_region().allocate(sz);
return new (mem) binding(pat, max_generation, min_top, max_top);
}
binding* b = new (mem) binding(pat, max_generation, min_top, max_top);
b->init(b);
for (unsigned i = 0; i < n; ++i)
b->m_nodes[i] = _binding[i];
return b;
}
euf::enode* const* ematch::alloc_binding(clause& c, euf::enode* const* _binding) {
unsigned sz = sizeof(euf::enode* const*) * c.num_decls();
@ -232,24 +238,22 @@ namespace q {
return binding;
}
void ematch::add_binding(clause& c, app* pat, euf::enode* const* _binding, unsigned max_generation, unsigned min_top, unsigned max_top) {
unsigned n = c.num_decls();
binding* b = alloc_binding(n, pat, max_generation, min_top, max_top);
b->init(b);
for (unsigned i = 0; i < n; ++i)
b->m_nodes[i] = _binding[i];
binding::push_to_front(c.m_bindings, b);
ctx.push(remove_binding(ctx, c, b));
++m_stats.m_num_delayed_bindings;
}
void ematch::on_binding(quantifier* q, app* pat, euf::enode* const* _binding, unsigned max_generation, unsigned min_gen, unsigned max_gen) {
TRACE("q", tout << "on-binding " << mk_pp(q, m) << "\n";);
unsigned idx = m_q2clauses[q];
clause& c = *m_clauses[idx];
bool new_propagation = false;
if (!propagate(false, _binding, max_generation, c, new_propagation))
add_binding(c, pat, _binding, max_generation, min_gen, max_gen);
binding* b = alloc_binding(c, pat, _binding, max_generation, min_gen, max_gen);
fingerprint* f = add_fingerprint(c, *b, max_generation);
if (!f)
return;
if (propagate(false, _binding, max_generation, c, new_propagation))
return;
binding::push_to_front(c.m_bindings, b);
ctx.push(remove_binding(ctx, c, b));
++m_stats.m_num_delayed_bindings;
}
bool ematch::propagate(bool is_owned, euf::enode* const* binding, unsigned max_generation, clause& c, bool& propagated) {
@ -547,6 +551,10 @@ namespace q {
}
bool ematch::unit_propagate() {
return ctx.get_config().m_ematching && propagate(false);
}
bool ematch::propagate(bool flush) {
m_mam->propagate();
bool propagated = flush_prop_queue();

8
src/sat/smt/q_ematch.h
View file

@ -90,10 +90,10 @@ namespace q {
unsigned_vector m_clause_queue;
euf::enode_pair_vector m_evidence;
binding* alloc_binding(unsigned n, app* pat, unsigned max_generation, unsigned min_top, unsigned max_top);
euf::enode* const* alloc_binding(clause& c, euf::enode* const* _binding);
binding* alloc_binding(clause& c, app* pat, euf::enode* const* _bidning, unsigned max_generation, unsigned min_top, unsigned max_top);
void add_binding(clause& c, app* pat, euf::enode* const* _binding, unsigned max_generation, unsigned min_top, unsigned max_top);
sat::ext_justification_idx mk_justification(unsigned idx, clause& c, euf::enode* const* b);
void ensure_ground_enodes(expr* e);
@ -121,13 +121,15 @@ namespace q {
bool flush_prop_queue();
void propagate(bool is_conflict, unsigned idx, sat::ext_justification_idx j_idx);
bool propagate(bool flush);
public:
ematch(euf::solver& ctx, solver& s);
bool operator()();
bool propagate(bool flush);
bool unit_propagate();
// void init_search();

31
src/sat/smt/q_mam.cpp
View file

@ -1987,33 +1987,36 @@ namespace q {
m_backtrack_stack.resize(t->get_num_choices());
}
struct scoped_unmark {
code_tree* t;
scoped_unmark(code_tree* t) : t(t) {}
~scoped_unmark() {
for (enode* app : t->get_candidates())
if (app->is_marked1())
app->unmark1();
}
};
void execute(code_tree * t) {
TRACE("trigger_bug", tout << "execute for code tree:\n"; t->display(tout););
init(t);
if (t->filter_candidates()) {
for (unsigned i = 0; i < t->get_candidates().size(); ++i) {
if (t->filter_candidates()) {
scoped_unmark _unmark(t);
for (unsigned i = 0; i < t->get_candidates().size() && !ctx.resource_limits_exceeded(); ++i) {
enode* app = t->get_candidates()[i];
TRACE("trigger_bug", tout << "candidate\n" << mk_ismt2_pp(app->get_expr(), m) << "\n";);
if (!app->is_marked1() && app->is_cgr()) {
if (ctx.resource_limits_exceeded() || !execute_core(t, app))
return;
execute_core(t, app);
app->mark1();
}
}
for (enode* app : t->get_candidates()) {
if (app->is_marked1())
app->unmark1();
}
}
else {
for (unsigned i = 0; i < t->get_candidates().size(); ++i) {
for (unsigned i = 0; i < t->get_candidates().size() && !ctx.resource_limits_exceeded(); ++i) {
enode* app = t->get_candidates()[i];
TRACE("trigger_bug", tout << "candidate\n" << mk_ismt2_pp(app->get_expr(), m) << "\n";);
if (app->is_cgr()) {
TRACE("trigger_bug", tout << "is_cgr\n";);
if (ctx.resource_limits_exceeded() || !execute_core(t, app))
return;
}
if (app->is_cgr())
execute_core(t, app);
}
}
}

2
src/sat/smt/q_solver.cpp
View file

@ -100,7 +100,7 @@ namespace q {
}
bool solver::unit_propagate() {
return ctx.get_config().m_ematching && m_ematch.propagate(false);
return m_ematch.unit_propagate();
}
euf::theory_var solver::mk_var(euf::enode* n) {