diff options
Diffstat (limited to 'passes/sat')
| -rw-r--r-- | passes/sat/sat.cc | 67 |
1 files changed, 62 insertions, 5 deletions
diff --git a/passes/sat/sat.cc b/passes/sat/sat.cc index 3000c54a0..769d94a07 100644 --- a/passes/sat/sat.cc +++ b/passes/sat/sat.cc @@ -52,12 +52,15 @@ struct SatHelper std::vector<std::string> shows; SigPool show_signal_pool; SigSet<RTLIL::Cell*> show_drivers; - int max_timestep; + int max_timestep, timeout; + bool gotTimeout; SatHelper(RTLIL::Design *design, RTLIL::Module *module) : design(design), module(module), sigmap(module), ct(design), satgen(&ez, design, &sigmap) { max_timestep = -1; + timeout = 0; + gotTimeout = false; } void setup(int timestep = -1) @@ -190,12 +193,22 @@ struct SatHelper bool solve(const std::vector<int> &assumptions) { - return ez.solve(modelExpressions, modelValues, assumptions); + log_assert(gotTimeout == false); + ez.setSolverTimeout(timeout); + bool success = ez.solve(modelExpressions, modelValues, assumptions); + if (ez.getSolverTimoutStatus()) + gotTimeout = true; + return success; } bool solve(int a = 0, int b = 0, int c = 0, int d = 0, int e = 0, int f = 0) { - return ez.solve(modelExpressions, modelValues, a, b, c, d, e, f); + log_assert(gotTimeout == false); + ez.setSolverTimeout(timeout); + bool success = ez.solve(modelExpressions, modelValues, a, b, c, d, e, f); + if (ez.getSolverTimoutStatus()) + gotTimeout = true; + return success; } struct ModelBlockInfo { @@ -380,6 +393,17 @@ static void print_proof_failed() log("\n"); } +static void print_timeout() +{ + log("\n"); + log(" _____ _ _ _____ ____ _ _____\n"); + log(" /__ __\\/ \\/ \\__/|/ __// _ \\/ \\ /\\/__ __\\\n"); + log(" / \\ | || |\\/||| \\ | / \\|| | || / \\\n"); + log(" | | | || | ||| /_ | \\_/|| \\_/| | |\n"); + log(" \\_/ \\_/\\_/ \\|\\____\\\\____/\\____/ \\_/\n"); + log("\n"); +} + static void print_qed() { log("\n"); @@ -442,9 +466,15 @@ struct SatPass : public Pass { log(" -maxsteps <N>\n"); log(" Set a maximum length for the induction.\n"); log("\n"); + log(" -timeout <N>\n"); + log(" Maximum number of seconds a single SAT instance may take.\n"); + log("\n"); log(" -verify\n"); log(" Return an error and stop the synthesis script if the proof fails.\n"); log("\n"); + log(" -verify-no-timeout\n"); + log(" Like -verify but do not return an error for timeouts.\n"); + log("\n"); } virtual void execute(std::vector<std::string> args, RTLIL::Design *design) { @@ -452,8 +482,8 @@ struct SatPass : public Pass { std::map<int, std::vector<std::pair<std::string, std::string>>> sets_at; std::map<int, std::vector<std::string>> unsets_at; std::vector<std::string> shows; - int loopcount = 0, seq_len = 0, maxsteps = 0; - bool verify = false; + int loopcount = 0, seq_len = 0, maxsteps = 0, timeout = 0; + bool verify = false, fail_on_timeout = false; log_header("Executing SAT pass (solving SAT problems in the circuit).\n"); @@ -464,9 +494,18 @@ struct SatPass : public Pass { continue; } if (args[argidx] == "-verify") { + fail_on_timeout = true; verify = true; continue; } + if (args[argidx] == "-verify-no-timeout") { + verify = true; + continue; + } + if (args[argidx] == "-timeout" && argidx+1 < args.size()) { + timeout = atoi(args[++argidx].c_str()); + continue; + } if (args[argidx] == "-max" && argidx+1 < args.size()) { loopcount = atoi(args[++argidx].c_str()); continue; @@ -539,6 +578,7 @@ struct SatPass : public Pass { basecase.sets_at = sets_at; basecase.unsets_at = unsets_at; basecase.shows = shows; + basecase.timeout = timeout; for (int timestep = 1; timestep <= seq_len; timestep++) basecase.setup(timestep); @@ -546,6 +586,7 @@ struct SatPass : public Pass { inductstep.sets = sets; inductstep.prove = prove; inductstep.shows = shows; + inductstep.timeout = timeout; inductstep.setup(1); inductstep.ez.assume(inductstep.setup_proof(1)); @@ -573,6 +614,9 @@ struct SatPass : public Pass { goto tip_failed; } + if (basecase.gotTimeout) + goto timeout; + log("Base case for induction length %d proven.\n", inductlen); basecase.ez.assume(property); @@ -589,6 +633,8 @@ struct SatPass : public Pass { inductstep.ez.numCnfVariables(), inductstep.ez.numCnfClauses()); if (!inductstep.solve(inductstep.ez.NOT(property))) { + if (inductstep.gotTimeout) + goto timeout; log("Induction step proven: SUCCESS!\n"); print_qed(); goto tip_success; @@ -622,6 +668,7 @@ struct SatPass : public Pass { sathelper.sets_at = sets_at; sathelper.unsets_at = unsets_at; sathelper.shows = shows; + sathelper.timeout = timeout; if (seq_len == 0) { sathelper.setup(); @@ -668,6 +715,8 @@ struct SatPass : public Pass { } else { + if (sathelper.gotTimeout) + goto timeout; if (did_rerun) log("SAT solving finished - no more models found.\n"); else if (prove.size() == 0) @@ -678,6 +727,14 @@ struct SatPass : public Pass { } } } + + if (0) { + timeout: + log("Interrupted SAT solver: TIMEOUT!\n"); + print_timeout(); + if (fail_on_timeout) + log_error("Called with -verify and proof did time out!\n"); + } } } SatPass; |