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smtbmc and qbfsat: Add timeout option to set solver timeouts for Z3, Yices, and CVC4.

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This commit is contained in:
Alberto Gonzalez 2020-05-01 23:17:35 +00:00
parent f9eef5e3f7
commit 9847a4eea8
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GPG key ID: 8395A8BA109708B2
3 changed files with 88 additions and 18 deletions
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66
passes/sat/qbfsat.cc
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@ -42,6 +42,7 @@ struct QbfSolveOptions {
bool nooptimize, nobisection;
bool sat, unsat, show_smtbmc;
enum Solver{Z3, Yices, CVC4} solver;
int timeout;
std::string specialize_soln_file;
std::string write_soln_soln_file;
std::string dump_final_smt2_file;
@ -49,7 +50,7 @@ struct QbfSolveOptions {
QbfSolveOptions() : specialize(false), specialize_from_file(false), write_solution(false),
nocleanup(false), dump_final_smt2(false), assume_outputs(false), assume_neg(false),
nooptimize(false), nobisection(false), sat(false), unsat(false), show_smtbmc(false),
solver(Yices), argidx(0) {};
solver(Yices), timeout(0), argidx(0) {};
};
std::string get_solver_name(const QbfSolveOptions &opt) {
@ -67,6 +68,11 @@ std::string get_solver_name(const QbfSolveOptions &opt) {
void recover_solution(QbfSolutionType &sol) {
YS_REGEX_TYPE sat_regex = YS_REGEX_COMPILE("Status: PASSED");
YS_REGEX_TYPE unsat_regex = YS_REGEX_COMPILE("Solver Error.*model is not available");
YS_REGEX_TYPE unsat_regex2 = YS_REGEX_COMPILE("Status: FAILED");
YS_REGEX_TYPE timeout_regex = YS_REGEX_COMPILE("No solution found! \\(timeout\\)");
YS_REGEX_TYPE timeout_regex2 = YS_REGEX_COMPILE("No solution found! \\(interrupted\\)");
YS_REGEX_TYPE unknown_regex = YS_REGEX_COMPILE("No solution found! \\(unknown\\)");
YS_REGEX_TYPE unknown_regex2 = YS_REGEX_COMPILE("Unexpected EOF response from solver");
YS_REGEX_TYPE memout_regex = YS_REGEX_COMPILE("Solver Error:.*error \"out of memory\"");
YS_REGEX_TYPE hole_value_regex = YS_REGEX_COMPILE_WITH_SUBS("Value for anyconst in [a-zA-Z0-9_]* \\(([^:]*:[^\\)]*)\\): (.*)");
#ifndef NDEBUG
@ -87,14 +93,40 @@ void recover_solution(QbfSolutionType &sol) {
#endif
sol.hole_to_value[loc] = val;
}
else if (YS_REGEX_NS::regex_search(x, sat_regex))
else if (YS_REGEX_NS::regex_search(x, sat_regex)) {
sat_regex_found = true;
else if (YS_REGEX_NS::regex_search(x, unsat_regex))
sol.sat = true;
sol.unknown = false;
}
else if (YS_REGEX_NS::regex_search(x, unsat_regex)) {
unsat_regex_found = true;
sol.sat = false;
sol.unknown = false;
}
else if (YS_REGEX_NS::regex_search(x, memout_regex)) {
sol.unknown = true;
log_warning("solver ran out of memory\n");
}
else if (YS_REGEX_NS::regex_search(x, timeout_regex)) {
sol.unknown = true;
log_warning("solver timed out\n");
}
else if (YS_REGEX_NS::regex_search(x, timeout_regex2)) {
sol.unknown = true;
log_warning("solver timed out\n");
}
else if (YS_REGEX_NS::regex_search(x, unknown_regex)) {
sol.unknown = true;
log_warning("solver returned \"unknown\"\n");
}
else if (YS_REGEX_NS::regex_search(x, unsat_regex2)) {
unsat_regex_found = true;
sol.sat = false;
sol.unknown = false;
}
else if (YS_REGEX_NS::regex_search(x, unknown_regex2)) {
sol.unknown = true;
}
}
#ifndef NDEBUG
log_assert(!sol.unknown && sol.sat? sat_regex_found : true);
@ -329,7 +361,7 @@ QbfSolutionType call_qbf_solver(RTLIL::Module *mod, const QbfSolveOptions &opt,
const std::string yosys_smtbmc_exe = proc_self_dirname() + "yosys-smtbmc";
const std::string smt2_command = "write_smt2 -stbv -wires " + tempdir_name + "/problem" + (iter_num != 0? stringf("%d", iter_num) : "") + ".smt2";
const std::string smtbmc_warning = "z3: WARNING:";
const std::string smtbmc_cmd = yosys_smtbmc_exe + " -s " + (get_solver_name(opt)) + " -t 1 -g --binary " + (opt.dump_final_smt2? "--dump-smt2 " + opt.dump_final_smt2_file + " " : "") + tempdir_name + "/problem" + (iter_num != 0? stringf("%d", iter_num) : "") + ".smt2 2>&1";
const std::string smtbmc_cmd = yosys_smtbmc_exe + " -s " + (get_solver_name(opt)) + (opt.timeout != 0? stringf(" --timeout %d", opt.timeout) : "") + " -t 1 -g --binary " + (opt.dump_final_smt2? "--dump-smt2 " + opt.dump_final_smt2_file + " " : "") + tempdir_name + "/problem" + (iter_num != 0? stringf("%d", iter_num) : "") + ".smt2 2>&1";
Pass::call(mod->design, smt2_command);
@ -344,14 +376,7 @@ QbfSolutionType call_qbf_solver(RTLIL::Module *mod, const QbfSolveOptions &opt,
};
log_header(mod->design, "Solving QBF-SAT problem.\n");
if (!quiet) log("Launching \"%s\".\n", smtbmc_cmd.c_str());
int retval = run_command(smtbmc_cmd, process_line);
if (retval == 0) {
ret.sat = true;
ret.unknown = false;
} else if (retval == 1) {
ret.sat = false;
ret.unknown = false;
}
run_command(smtbmc_cmd, process_line);
recover_solution(ret);
return ret;
@ -514,6 +539,19 @@ QbfSolveOptions parse_args(const std::vector<std::string> &args) {
}
continue;
}
else if (args[opt.argidx] == "-timeout") {
if (args.size() <= opt.argidx + 1)
log_cmd_error("timeout not specified.\n");
else {
int timeout = atoi(args[opt.argidx+1].c_str());
if (timeout > 0)
opt.timeout = timeout;
else
log_cmd_error("timeout must be greater than 0.\n");
opt.argidx++;
}
continue;
}
else if (args[opt.argidx] == "-sat") {
opt.sat = true;
continue;
@ -625,6 +663,9 @@ struct QbfSatPass : public Pass {
log(" -solver <solver>\n");
log(" Use a particular solver. Choose one of: \"z3\", \"yices\", and \"cvc4\".\n");
log("\n");
log(" -timeout <value>\n");
log(" Set the per-iteration timeout in seconds.\n");
log("\n");
log(" -sat\n");
log(" Generate an error if the solver does not return \"sat\".\n");
log("\n");
@ -672,7 +713,6 @@ struct QbfSatPass : public Pass {
QbfSolutionType ret = qbf_solve(module, opt);
module = design->module(module_name);
if (ret.unknown) {
log_warning("solver did not give an answer\n");
if (opt.sat || opt.unsat)
log_cmd_error("expected problem to be %s\n", opt.sat? "SAT" : "UNSAT");
}