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Add facilities to get optimal assignments

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Anh-Dung Phan 2013-11-24 22:31:52 +01:00
parent 2ff51e9a60
commit cc3d65e544
6 changed files with 98 additions and 18 deletions
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25
src/smt/theory_diff_logic_def.h
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@ -29,6 +29,7 @@ Revision History:
#include"warning.h"
#include"smt_model_generator.h"
#include"network_flow_def.h"
#include"model_implicant.h"
using namespace smt;
@ -1036,9 +1037,12 @@ inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
vector<numeral> & current_assigments = m_objective_assignments[v];
SASSERT(!current_assigments.empty());
TRACE("network_flow",
for (unsigned i = 0; i < current_assigments.size(); ++i) {
tout << "v" << i << " -> " << current_assigments[i] << std::endl;
ast_manager& m = get_manager();
IF_VERBOSE(1,
verbose_stream() << "Optimal assigment:" << std::endl;
for (unsigned i = 0; i < objective.size(); ++i) {
theory_var v = objective[i].first;
verbose_stream() << mk_pp(get_enode(v)->get_owner(), m) << " |-> " << current_assigments[v] << std::endl;
});
rational r = objective_value.get_rational().to_rational();
rational i = objective_value.get_infinitesimal().to_rational();
@ -1068,7 +1072,7 @@ theory_var theory_diff_logic<Ext>::add_objective(app* term) {
}
template<typename Ext>
expr* theory_diff_logic<Ext>::block_lower_bound(theory_var v, inf_rational const& val) {
expr* theory_diff_logic<Ext>::block_objective(theory_var v, inf_rational const& val) {
ast_manager& m = get_manager();
objective_term const& t = m_objectives[v];
expr_ref e(m), f(m), f2(m);
@ -1135,6 +1139,19 @@ expr* theory_diff_logic<Ext>::block_lower_bound(theory_var v, inf_rational const
}
}
template<typename Ext>
expr* theory_diff_logic<Ext>::block_lower_bound(theory_var v, inf_rational const& val) {
expr * o = block_objective(v, val);
context & ctx = get_context();
model_ref mdl;
ctx.get_model(mdl);
ptr_vector<expr> formulas(ctx.get_num_asserted_formulas(), ctx.get_asserted_formulas());
ast_manager& m = get_manager();
model_implicant impl_extractor(m);
expr_ref_vector implicants = impl_extractor.minimize_literals(formulas, mdl);
return m.mk_and(o, m.mk_not(m.mk_and(implicants.size(), implicants.c_ptr())));
}
template<typename Ext>
bool theory_diff_logic<Ext>::internalize_objective(expr * n, rational const& m, rational& q, objective_term & objective) {