inline dimacs_problem parse_dimacs_from_file(std::string const& path)
{
std::fstream in(path.c_str());
std::istream stream(in.rdbuf());
return parse_dimacs(stream);
}
void solve_cnf(const char * file) {
clock_t start_time = clock();
simple_sat_solver solver(g_front_end_params);
std::ifstream in(file);
parse_dimacs(in, solver);
lbool r = solver.check();
clock_t end_time = clock();
switch(r) {
case l_false:
std::cout << "unsat\n";
break;
case l_undef:
std::cout << "unknown\n";
break;
case l_true:
std::cout << "sat\n";
if (g_front_end_params.m_build_model) {
solver.display_model(std::cout);
}
break;
}
if (g_display_statistics) {
solver.display_statistics(std::cerr);
memory::display_max_usage(std::cerr);
std::cerr << "time: " << ((static_cast<double>(end_time) - static_cast<double>(start_time)) / CLOCKS_PER_SEC) << "\n";
}
}
unsigned read_dimacs(char const * file_name) {
g_start_time = clock();
register_on_timeout_proc(on_timeout);
signal(SIGINT, on_ctrl_c);
params_ref p = gparams::get_module("sat");
p.set_bool("produce_models", true);
reslimit limit;
sat::solver solver(p, limit, 0);
g_solver = &solver;
if (file_name) {
std::ifstream in(file_name);
if (in.bad() || in.fail()) {
std::cerr << "(error \"failed to open file '" << file_name << "'\")" << std::endl;
exit(ERR_OPEN_FILE);
}
parse_dimacs(in, solver);
}
else {
parse_dimacs(std::cin, solver);
}
IF_VERBOSE(20, solver.display_status(verbose_stream()););
static void solver_from_dimacs_stream(Z3_context c, Z3_solver s, std::istream& is) {
init_solver(c, s);
ast_manager& m = to_solver_ref(s)->get_manager();
std::stringstream err;
sat::solver solver(to_solver_ref(s)->get_params(), m.limit());
if (!parse_dimacs(is, err, solver)) {
SET_ERROR_CODE(Z3_PARSER_ERROR, err.str().c_str());
return;
}
sat2goal s2g;
ref<sat2goal::mc> mc;
atom2bool_var a2b(m);
for (unsigned v = 0; v < solver.num_vars(); ++v) {
a2b.insert(m.mk_const(symbol(v), m.mk_bool_sort()), v);
}
goal g(m);
s2g(solver, a2b, to_solver_ref(s)->get_params(), g, mc);
for (unsigned i = 0; i < g.size(); ++i) {
to_solver_ref(s)->assert_expr(g.form(i));
}
}
