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Enhancement for Valentin #332

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-11-19 10:26:01 -08:00
parent 2122fdee45
commit 0592e76574
4 changed files with 31 additions and 6 deletions
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20
src/opt/opt_context.cpp
View file

@ -241,27 +241,37 @@ namespace opt {
TRACE("opt", model_smt2_pp(tout, m, *m_model, 0););
m_optsmt.setup(*m_opt_solver.get());
update_lower();
switch (m_objectives.size()) {
case 0:
return is_sat;
break;
case 1:
return execute(m_objectives[0], true, false);
is_sat = execute(m_objectives[0], true, false);
break;
default: {
opt_params optp(m_params);
symbol pri = optp.priority();
if (pri == symbol("pareto")) {
return execute_pareto();
is_sat = execute_pareto();
}
else if (pri == symbol("box")) {
return execute_box();
is_sat = execute_box();
}
else {
return execute_lex();
is_sat = execute_lex();
}
break;
}
}
return adjust_unknown(is_sat);
}
lbool context::adjust_unknown(lbool r) {
if (r == l_true && m_opt_solver.get() && m_opt_solver->was_unknown()) {
r = l_undef;
}
return r;
}
bool context::print_model() const {
opt_params optp(m_params);

1
src/opt/opt_context.h
View file

@ -229,6 +229,7 @@ namespace opt {
lbool execute_lex();
lbool execute_box();
lbool execute_pareto();
lbool adjust_unknown(lbool r);
bool scoped_lex();
expr_ref to_expr(inf_eps const& n);

12
src/opt/opt_solver.cpp
View file

@ -44,7 +44,8 @@ namespace opt {
m_fm(fm),
m_objective_terms(m),
m_dump_benchmarks(false),
m_first(true) {
m_first(true),
m_was_unknown(false) {
m_params.updt_params(p);
if (m_params.m_case_split_strategy == CS_ACTIVITY_DELAY_NEW) {
m_params.m_relevancy_lvl = 0;
@ -173,6 +174,7 @@ namespace opt {
else {
r = m_context.check(num_assumptions, assumptions);
}
r = adjust_result(r);
m_first = false;
if (dump_benchmarks()) {
w.stop();
@ -242,6 +244,7 @@ namespace opt {
TRACE("opt", tout << ge << "\n";);
assert_expr(ge);
lbool is_sat = m_context.check(0, 0);
is_sat = adjust_result(is_sat);
if (is_sat == l_true) {
set_model(i);
}
@ -261,6 +264,13 @@ namespace opt {
}
lbool opt_solver::adjust_result(lbool r) {
if (r == l_undef && m_context.last_failure() == smt::QUANTIFIERS) {
r = l_true;
m_was_unknown = true;
}
return r;
}
void opt_solver::get_unsat_core(ptr_vector<expr> & r) {
unsigned sz = m_context.get_unsat_core_size();

4
src/opt/opt_solver.h
View file

@ -82,6 +82,7 @@ namespace opt {
static unsigned m_dump_count;
statistics m_stats;
bool m_first;
bool m_was_unknown;
public:
opt_solver(ast_manager & m, params_ref const & p, filter_model_converter& fm);
virtual ~opt_solver();
@ -117,6 +118,8 @@ namespace opt {
return m_valid_objectives[obj_index];
}
bool was_unknown() const { return m_was_unknown; }
vector<inf_eps> const& get_objective_values();
expr_ref mk_ge(unsigned obj_index, inf_eps const& val);
@ -136,6 +139,7 @@ namespace opt {
private:
lbool decrement_value(unsigned i, inf_eps& val);
void set_model(unsigned i);
lbool adjust_result(lbool r);
};
}