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https://github.com/Z3Prover/z3
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107 lines
2.5 KiB
C++
107 lines
2.5 KiB
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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dimacs_frontend.cpp
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Abstract:
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Frontend for reading dimacs input files
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Author:
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Leonardo de Moura (leonardo) 2011-07-26.
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Revision History:
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--*/
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#include<iostream>
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#include<time.h>
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#include<signal.h>
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#include"timeout.h"
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#include"dimacs.h"
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#include"sat_solver.h"
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#include"front_end_params.h"
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extern bool g_display_statistics;
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static sat::solver * g_solver = 0;
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static clock_t g_start_time;
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static void display_statistics() {
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clock_t end_time = clock();
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if (g_solver && g_display_statistics) {
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std::cout.flush();
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std::cerr.flush();
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statistics st;
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g_solver->collect_statistics(st);
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st.update("total time", ((static_cast<double>(end_time) - static_cast<double>(g_start_time)) / CLOCKS_PER_SEC));
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st.display_smt2(std::cout);
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}
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}
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static void on_timeout() {
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display_statistics();
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exit(0);
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}
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static void on_ctrl_c(int) {
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signal (SIGINT, SIG_DFL);
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display_statistics();
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raise(SIGINT);
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}
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static void display_model(sat::solver const & s) {
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sat::model const & m = s.get_model();
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for (unsigned i = 1; i < m.size(); i++) {
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switch (m[i]) {
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case l_false: std::cout << "-" << i << " "; break;
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case l_undef: break;
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case l_true: std::cout << i << " "; break;
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}
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}
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std::cout << "\n";
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}
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unsigned read_dimacs(char const * file_name, front_end_params & front_end_params) {
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g_start_time = clock();
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register_on_timeout_proc(on_timeout);
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signal(SIGINT, on_ctrl_c);
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params_ref p;
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p.set_bool("produce_models", front_end_params.m_model);
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sat::solver solver(p, 0);
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g_solver = &solver;
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if (file_name) {
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std::ifstream in(file_name);
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if (in.bad() || in.fail()) {
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std::cerr << "(error \"failed to open file '" << file_name << "'\")" << std::endl;
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exit(ERR_OPEN_FILE);
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}
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parse_dimacs(in, solver);
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}
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else {
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parse_dimacs(std::cin, solver);
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}
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IF_VERBOSE(20, solver.display_status(verbose_stream()););
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lbool r = solver.check();
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switch (r) {
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case l_true:
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std::cout << "sat\n";
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if (front_end_params.m_model)
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display_model(solver);
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break;
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case l_undef:
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std::cout << "unknown\n";
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break;
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case l_false:
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std::cout << "unsat\n";
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break;
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}
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if (g_display_statistics)
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display_statistics();
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return 0;
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}
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