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model converter fixes

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Signed-off-by: Miguel Angelo Da Terra Neves <t-mineve@microsoft.com>
This commit is contained in:
Miguel Angelo Da Terra Neves 2017-11-29 17:14:49 -08:00
parent 7e56d05dcf
commit cba0599046
2 changed files with 39 additions and 62 deletions
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86
src/sat/tactic/goal2sat.cpp
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@ -891,6 +891,35 @@ struct sat2goal::imp {
m_var2expr(m) {
}
void ensure_imc() {
if (m_imc) return;
m_imc = alloc(generic_model_converter, m());
sat::literal_vector updates;
m_mc.expand(updates);
sat::literal_vector clause;
expr_ref_vector tail(m());
expr_ref def(m());
for (sat::literal l : updates) {
if (l == sat::null_literal) {
sat::literal lit0 = clause[0];
for (unsigned i = 1; i < clause.size(); ++i) {
tail.push_back(lit2expr(~clause[i]));
}
def = m().mk_or(lit2expr(lit0), mk_and(tail));
if (lit0.sign()) {
lit0.neg();
def = m().mk_not(def);
}
m_imc->add(lit2expr(lit0), def);
clause.reset();
tail.reset();
}
else {
clause.push_back(l);
}
}
}
public:
sat_model_converter(ast_manager & m, sat::solver const & s):m_var2expr(m) {
m_mc.copy(s.get_model_converter());
@ -979,6 +1008,7 @@ struct sat2goal::imp {
virtual model_converter * translate(ast_translation & translator) {
sat_model_converter * res = alloc(sat_model_converter, translator.to());
res->m_mc = m_mc;
res->m_fmc = static_cast<generic_model_converter*>(m_fmc->translate(translator));
for (expr* e : m_var2expr)
res->m_var2expr.push_back(e ? translator(e) : nullptr);
@ -995,30 +1025,8 @@ struct sat2goal::imp {
}
void display(std::ostream & out) {
sat::literal_vector updates;
m_mc.expand(updates);
sat::literal_vector clause;
expr_ref_vector tail(m());
expr_ref def(m());
for (sat::literal l : updates) {
if (l == sat::null_literal) {
sat::literal lit0 = clause[0];
for (unsigned i = 1; i < clause.size(); ++i) {
tail.push_back(lit2expr(~clause[i]));
}
def = m().mk_or(lit2expr(lit0), mk_and(tail));
if (lit0.sign()) {
lit0.neg();
def = m().mk_not(def);
}
display_add(out, m(), to_app(lit2expr(lit0))->get_decl(), def);
clause.reset();
tail.reset();
}
else {
clause.push_back(l);
}
}
ensure_imc();
m_imc->display(out);
m_fmc->display(out);
}
@ -1026,36 +1034,12 @@ struct sat2goal::imp {
m_env = &visitor.env();
for (expr* e : m_var2expr) if (e) visitor.coll.visit(e);
if (m_fmc) m_fmc->collect(visitor);
ensure_imc();
m_imc->collect(visitor);
}
void operator()(expr_ref& formula) override {
if (!m_imc) {
m_imc = alloc(generic_model_converter, m());
sat::literal_vector updates;
m_mc.expand(updates);
sat::literal_vector clause;
expr_ref_vector tail(m());
expr_ref def(m());
for (sat::literal l : updates) {
if (l == sat::null_literal) {
sat::literal lit0 = clause[0];
for (unsigned i = 1; i < clause.size(); ++i) {
tail.push_back(lit2expr(~clause[i]));
}
def = m().mk_or(lit2expr(lit0), mk_and(tail));
if (lit0.sign()) {
lit0.neg();
def = m().mk_not(def);
}
m_imc->add(lit2expr(lit0), def);
clause.reset();
tail.reset();
}
else {
clause.push_back(l);
}
}
}
ensure_imc();
(*m_imc)(formula);
}
};