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bugfix to elim_uncnstr to ensure nodes are created. Prepare smt_internalizer to replay unit literals

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-12-04 15:32:08 -08:00
parent 6ea4110b30
commit a17d4e68eb
4 changed files with 21 additions and 12 deletions
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5
src/ast/expr_substitution.cpp
View file

@ -19,6 +19,7 @@ Notes:
#include "util/ref_util.h"
#include "ast/expr_substitution.h"
#include "ast/ast_pp.h"
#include "ast/ast_ll_pp.h"
typedef obj_map<expr, proof*> expr2proof;
typedef obj_map<expr, expr_dependency*> expr2expr_dependency;
@ -58,8 +59,8 @@ expr_substitution::~expr_substitution() {
}
std::ostream& expr_substitution::display(std::ostream& out) {
for (auto & kv : m_subst) {
out << mk_pp(kv.m_key, m()) << " |-> " << mk_pp(kv.m_value, m()) << "\n";
for (auto & [k, v] : m_subst) {
out << mk_bounded_pp(k, m()) << " |-> " << mk_bounded_pp(v, m()) << "\n";
}
return out;
}

10
src/ast/simplifiers/elim_unconstrained.cpp
View file

@ -131,7 +131,9 @@ elim_unconstrained::~elim_unconstrained() {
}
bool elim_unconstrained::is_var_lt(int v1, int v2) const {
return get_node(v1).num_parents() < get_node(v2).num_parents();
auto p1 = get_node(v1).num_parents();
auto p2 = get_node(v2).num_parents();
return p1 < p2;
}
void elim_unconstrained::eliminate() {
@ -287,8 +289,11 @@ void elim_unconstrained::init_nodes() {
for (expr* e : subterms_postorder::all(terms)) {
SASSERT(get_node(e).is_root());
if (is_uninterp_const(e))
if (is_uninterp_const(e)) {
get_node(e); // ensure the node exists
m_heap.insert(e->get_id());
}
}
// mark top level terms
@ -390,7 +395,6 @@ void elim_unconstrained::update_model_trail(generic_model_converter& mc, vector<
trail.hide(entry.m_f);
break;
case generic_model_converter::instruction::ADD:
// trail.push(entry.m_f, entry.m_def, nullptr, old_fmls);
break;
}
}

4
src/smt/smt_context.cpp
View file

@ -2381,7 +2381,7 @@ namespace smt {
unsigned i = units_to_reassert_lim;
unsigned sz = m_units_to_reassert.size();
for (; i < sz; i++) {
auto& [unit, sign, is_relevant] = m_units_to_reassert[i];
auto [unit, sign, is_relevant] = m_units_to_reassert[i];
bool gate_ctx = true;
internalize(unit, gate_ctx);
bool_var v = get_bool_var(unit);
@ -2389,7 +2389,7 @@ namespace smt {
assign(l, b_justification::mk_axiom());
if (is_relevant)
mark_as_relevant(l);
TRACE("reassert_units", tout << "reasserting #" << unit->get_id() << " " << sign << " @ " << m_scope_lvl << "\n";);
TRACE("reassert_units", tout << "reasserting #" << unit->get_id() << " " << sign << " @ " << m_scope_lvl << "\n";);
}
if (at_base_level())
m_units_to_reassert.reset();

14
src/smt/smt_internalizer.cpp
View file

@ -1396,8 +1396,7 @@ namespace smt {
DEBUG_CODE(for (literal lit : simp_lits) SASSERT(get_assignment(lit) == l_true););
if (!simp_lits.empty()) {
j = mk_justification(unit_resolution_justification(*this, j, simp_lits.size(), simp_lits.data()));
}
}
break;
}
case CLS_TH_LEMMA:
@ -1423,6 +1422,7 @@ namespace smt {
unsigned activity = 1;
bool lemma = is_lemma(k);
m_stats.m_num_mk_lits += num_lits;
switch (num_lits) {
case 0:
if (j && !j->in_region())
@ -1431,12 +1431,16 @@ namespace smt {
set_conflict(j == nullptr ? b_justification::mk_axiom() : b_justification(j));
SASSERT(inconsistent());
return nullptr;
case 1:
case 1: {
literal unit = lits[0];
expr* atom = m_bool_var2expr[unit.var()];
if (j && !j->in_region())
m_justifications.push_back(j);
assign(lits[0], j);
inc_ref(lits[0]);
assign(unit, j);
inc_ref(unit);
// m_units_to_reassert.push_back({ expr_ref(atom, m), unit.sign(), is_relevant(unit) });
return nullptr;
}
case 2:
if (use_binary_clause_opt(lits[0], lits[1], lemma)) {
literal l1 = lits[0];