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add unit extraction

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-03-06 01:08:17 -08:00
parent 75ba65a18a
commit 718e5a9b6c
27 changed files with 207 additions and 76 deletions
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34
src/solver/solver.cpp
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@ -211,7 +211,35 @@ void solver::updt_params(params_ref const & p) {
m_enforce_model_conversion = m_params.get_bool("solver.enforce_model_conversion", false);
}
void solver::hoist_converter(model_converter_ref& mc) {
}
expr_ref_vector solver::get_units(ast_manager& m) {
expr_ref_vector fmls(m), result(m), tmp(m);
get_assertions(fmls);
obj_map<expr, bool> units;
for (expr* f : fmls) {
if (m.is_not(f, f) && is_literal(m, f)) {
m.inc_ref(f);
units.insert(f, false);
}
else if (is_literal(m, f)) {
m.inc_ref(f);
units.insert(f, true);
}
}
model_converter_ref mc = get_model_converter();
if (mc) {
mc->get_units(units);
}
for (auto const& kv : units) {
tmp.push_back(kv.m_key);
if (kv.m_value)
result.push_back(kv.m_key);
else
result.push_back(m.mk_not(kv.m_key));
}
for (expr* e : tmp) {
m.dec_ref(e);
}
return result;
}

6
src/solver/solver.h
View file

@ -203,6 +203,11 @@ public:
virtual model_converter_ref get_model_converter() const { return m_mc0; }
/**
\brief extract units from solver.
*/
expr_ref_vector get_units(ast_manager& m);
class scoped_push {
solver& s;
bool m_nopop;
@ -220,7 +225,6 @@ protected:
bool is_literal(ast_manager& m, expr* e);
void hoist_converter(model_converter_ref& mc);
};
typedef ref<solver> solver_ref;