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#5429

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This commit is contained in:
Nikolaj Bjorner 2021-07-31 11:00:12 -07:00
parent e5401a4303
commit 6a9241ff0f
5 changed files with 44 additions and 27 deletions
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1
src/sat/sat_drat.cpp
View file

@ -91,7 +91,6 @@ namespace sat {
unsigned len = 0;
if (st.is_deleted()) {
buffer[len++] = 'd';
buffer[len++] = ' ';

23
src/sat/smt/euf_proof.cpp
View file

@ -33,31 +33,23 @@ namespace euf {
drat_log_decl(a->get_decl());
std::stringstream strm;
strm << mk_ismt2_func(a->get_decl(), m);
if (a->get_num_parameters() == 0)
get_drat().def_begin('e', e->get_id(), strm.str());
else {
get_drat().def_begin('e', e->get_id(), strm.str());
}
get_drat().def_begin('e', e->get_id(), strm.str());
for (expr* arg : *a)
get_drat().def_add_arg(arg->get_id());
get_drat().def_end();
}
else if (is_var(e)) {
var* v = to_var(e);
std::stringstream strm;
strm << mk_pp(e->get_sort(), m);
get_drat().def_begin('v', v->get_id(), strm.str());
get_drat().def_begin('v', v->get_id(), "" + mk_pp(e->get_sort(), m));
get_drat().def_add_arg(v->get_idx());
get_drat().def_end();
}
else if (is_quantifier(e)) {
quantifier* q = to_quantifier(e);
std::stringstream strm;
strm << "(";
strm << (is_forall(q) ? "forall" : (is_exists(q) ? "exists" : "lambda"));
for (unsigned i = 0; i < q->get_num_decls(); ++i) {
strm << " (" << q->get_decl_name(i) << " " << mk_pp(q->get_decl_sort(i), m) << ")";
}
std::stringstream strm;
strm << "(" << (is_forall(q) ? "forall" : (is_exists(q) ? "exists" : "lambda"));
for (unsigned i = 0; i < q->get_num_decls(); ++i)
strm << " (" << q->get_decl_name(i) << " " << mk_pp(q->get_decl_sort(i), m) << ")";
strm << ")";
get_drat().def_begin('q', q->get_id(), strm.str());
get_drat().def_add_arg(q->get_expr()->get_id());
@ -88,7 +80,8 @@ namespace euf {
}
if (m_drat_todo.size() != sz)
continue;
drat_log_expr1(e);
if (!m_drat_asts.contains(e))
drat_log_expr1(e);
m_drat_todo.pop_back();
}
}

20
src/sat/tactic/goal2sat.cpp
View file

@ -599,8 +599,8 @@ struct goal2sat::imp : public sat::sat_internalizer {
}
void convert_iff(app * t, bool root, bool sign) {
if (t->get_num_args() != 2)
throw default_exception("unexpected number of arguments to xor");
if (t->get_num_args() != 2)
throw default_exception("unexpected number of arguments to " + mk_pp(t, m));
SASSERT(t->get_num_args() == 2);
unsigned sz = m_result_stack.size();
SASSERT(sz >= 2);
@ -608,6 +608,8 @@ struct goal2sat::imp : public sat::sat_internalizer {
sat::literal l2 = m_result_stack[sz-2];
m_result_stack.shrink(sz - 2);
if (root) {
if (m.is_xor(t))
sign = !sign;
SASSERT(sz == 2);
if (sign) {
mk_root_clause(l1, l2);
@ -616,17 +618,20 @@ struct goal2sat::imp : public sat::sat_internalizer {
else {
mk_root_clause(l1, ~l2);
mk_root_clause(~l1, l2);
}
}
}
else {
sat::bool_var k = add_var(false, t);
sat::literal l(k, false);
if (m.is_xor(t))
l1.neg();
mk_clause(~l, l1, ~l2);
mk_clause(~l, ~l1, l2);
mk_clause(l, l1, l2);
mk_clause(l, l1, l2);
mk_clause(l, ~l1, ~l2);
if (aig()) aig()->add_iff(l, l1, l2);
cache(t, m.is_xor(t) ? ~l : l);
if (aig()) aig()->add_iff(l, l1, l2);
cache(t, l);
if (sign)
l.neg();
m_result_stack.push_back(l);
@ -720,7 +725,7 @@ struct goal2sat::imp : public sat::sat_internalizer {
convert_iff(t, root, sign);
break;
case OP_XOR:
convert_iff(t, root, !sign);
convert_iff(t, root, sign);
break;
case OP_IMPLIES:
convert_implies(t, root, sign);
@ -828,6 +833,7 @@ struct goal2sat::imp : public sat::sat_internalizer {
process(n, false, redundant);
SASSERT(m_result_stack.size() == sz + 1);
sat::literal result = m_result_stack.back();
TRACE("goal2sat", tout << "done internalize " << result << " " << mk_bounded_pp(n, m, 2) << "\n";);
m_result_stack.pop_back();
if (!result.sign() && m_map.to_bool_var(n) == sat::null_bool_var) {
force_push();