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fix #3064

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-02-21 20:26:57 -08:00
parent dcd4fff284
commit 589db2052a
2 changed files with 18 additions and 5 deletions
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21
src/qe/qsat.cpp
View file

@ -131,7 +131,7 @@ namespace qe {
m_asms.resize(m_asms_lim[l]);
m_asms_lim.shrink(l);
}
void pred_abs::insert(app* a, max_level const& lvl) {
unsigned l = lvl.max();
if (l == UINT_MAX) l = 0;
@ -201,6 +201,14 @@ namespace qe {
model_v2_pp(tout, *mdl);
display(tout, asms););
}
void pred_abs::ensure_expr_level(app* v, unsigned lvl) {
if (!m_elevel.contains(v)) {
max_level ml;
if (lvl % 2 == 0) ml.m_ex = lvl; else ml.m_fa = lvl;
m_elevel.insert(v, ml);
}
}
void pred_abs::set_expr_level(app* v, max_level const& lvl) {
m_elevel.insert(v, lvl);
@ -243,6 +251,7 @@ namespace qe {
}
if (is_uninterp_const(a) && m.is_bool(a)) {
TRACE("qe", tout << mk_pp(a, m) << "\n";);
l = m_elevel.find(a);
level.merge(l);
if (!m_pred2lit.contains(a)) {
@ -911,16 +920,18 @@ namespace qe {
SASSERT(m_level >= 2);
expr_ref fml(m);
expr_ref_vector defs(m), core_save(m);
max_level level;
model& mdl = *m_model.get();
SASSERT(validate_core(mdl, core));
get_vars(m_level-1);
SASSERT(validate_project(mdl, core));
m_mbp(force_elim(), m_avars, mdl, core);
TRACE("qe", tout << "aux vars: " << m_avars << "\n";);
for (app* v : m_avars) m_pred_abs.ensure_expr_level(v, m_level-1);
m_free_vars.append(m_avars);
fml = negate_core(core);
unsigned num_scopes = 0;
max_level level;
m_pred_abs.abstract_atoms(fml, level, defs);
m_ex.assert_expr(mk_and(defs));
m_fa.assert_expr(mk_and(defs));
@ -1196,10 +1207,10 @@ namespace qe {
// (core[model(vars)/vars] => proj)
expr_ref_vector fmls(m);
fmls.append(core.size(), core.c_ptr());
for (unsigned i = 0; i < m_avars.size(); ++i) {
for (expr* v : m_avars) {
expr_ref val(m);
VERIFY(mdl.eval(m_avars[i].get(), val));
fmls.push_back(m.mk_eq(m_avars[i].get(), val));
VERIFY(mdl.eval(v, val));
fmls.push_back(m.mk_eq(v, val));
}
fmls.push_back(m.mk_not(mk_and(proj)));
if (!check_fmls(fmls)) {

2
src/qe/qsat.h
View file

@ -97,7 +97,9 @@ namespace qe {
void push();
void pop(unsigned num_scopes);
void insert(app* a, max_level const& lvl);
void insert_var(app* v, max_level const& lvl);
void get_assumptions(model* mdl, expr_ref_vector& asms);
void ensure_expr_level(app* v, unsigned lvl);
void set_expr_level(app* v, max_level const& lvl);
void set_decl_level(func_decl* v, max_level const& lvl);
void abstract_atoms(expr* fml, max_level& level, expr_ref_vector& defs);