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enable wcnf output for weighted maxsat problems

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This commit is contained in:
Nikolaj Bjorner 2021-02-28 09:59:36 -08:00
parent b02cba6106
commit 13f05ae9dc
6 changed files with 115 additions and 60 deletions
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18
src/opt/opt_context.cpp
View file

@ -24,6 +24,7 @@ Notes:
#include "ast/pb_decl_plugin.h"
#include "ast/ast_smt_pp.h"
#include "ast/ast_pp_util.h"
#include "ast/display_dimacs.h"
#include "model/model_smt2_pp.h"
#include "tactic/goal.h"
#include "tactic/tactic.h"
@ -1540,9 +1541,12 @@ namespace opt {
m_enable_sls = _p.enable_sls();
m_maxsat_engine = _p.maxsat_engine();
m_pp_neat = _p.pp_neat();
m_pp_wcnf = _p.pp_wcnf();
}
std::string context::to_string() const {
std::string context::to_string() {
if (m_pp_wcnf)
return to_wcnf();
return to_string(false, m_scoped_state.m_hard, m_scoped_state.m_objectives);
}
@ -1557,6 +1561,9 @@ namespace opt {
auto const& objectives = m_objectives;
if (objectives.size() > 1)
throw default_exception("only single objective weighted MaxSAT wcnf output is supported");
ptr_vector<expr> soft_f;
vector<rational> soft_w;
svector<std::pair<expr*, unsigned>> soft;
if (objectives.size() == 1) {
auto const& obj = objectives[0];
if (obj.m_type != O_MAXSMT)
@ -1565,10 +1572,15 @@ namespace opt {
rational w = obj.m_weights[j];
if (!w.is_unsigned())
throw default_exception("only single objective weighted MaxSAT wcnf output is supported");
soft_f.push_back(obj.m_terms[j]);
soft_w.push_back(w);
}
}
NOT_IMPLEMENTED_YET();
return std::string("");
std::ostringstream strm;
m_sat_solver = mk_inc_sat_solver(m, m_params);
m_sat_solver->assert_expr(m_hard_constraints);
inc_sat_display(strm, *m_sat_solver.get(), soft_f.size(), soft_f.c_ptr(), soft_w.c_ptr());
return strm.str();
}
std::string context::to_string(bool is_internal, expr_ref_vector const& hard, vector<objective> const& objectives) const {

11
src/opt/opt_context.h
View file

@ -179,10 +179,11 @@ namespace opt {
func_decl_ref_vector m_objective_refs;
expr_ref_vector m_core;
tactic_ref m_simplify;
bool m_enable_sat;
bool m_enable_sls;
bool m_is_clausal;
bool m_pp_neat;
bool m_enable_sat { true } ;
bool m_enable_sls { false };
bool m_is_clausal { false };
bool m_pp_neat { true };
bool m_pp_wcnf { false };
symbol m_maxsat_engine;
symbol m_logic;
svector<symbol> m_labels;
@ -232,7 +233,7 @@ namespace opt {
void get_lower(unsigned idx, expr_ref_vector& es) { to_exprs(get_lower_as_num(idx), es); }
void get_upper(unsigned idx, expr_ref_vector& es) { to_exprs(get_upper_as_num(idx), es); }
std::string to_string() const;
std::string to_string();
unsigned num_objectives() override { return m_scoped_state.m_objectives.size(); }

1
src/opt/opt_params.pyg
View file

@ -16,6 +16,7 @@ def_module_params('opt',
('elim_01', BOOL, True, 'eliminate 01 variables'),
('pp.neat', BOOL, True, 'use neat (as opposed to less readable, but faster) pretty printer when displaying context'),
('pb.compile_equality', BOOL, False, 'compile arithmetical equalities into pseudo-Boolean equality (instead of two inequalites)'),
('pp.wcnf', BOOL, False, 'print maxsat benchmark into wcnf format'),
('maxlex.enable', BOOL, True, 'enable maxlex heuristic for lexicographic MaxSAT problems'),
('maxres.hill_climb', BOOL, True, 'give preference for large weight cores'),
('maxres.add_upper_bound_block', BOOL, False, 'restict upper bound with constraint'),