mirror of https://github.com/YosysHQ/yosys.git
Added "sat -tempinduct-baseonly -tempinduct-inductonly"
This commit is contained in:
Clifford Wolf
parent
dcbd00c101
commit
1688b9b464
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@ -984,6 +984,12 @@ struct SatPass : public Pass {
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log(" Perform a temporal induction proof. Assume an initial state with all\n");
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log(" registers set to defined values for the induction step.\n");
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log("\n");
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log(" -tempinduct-baseonly\n");
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log(" Run only the basecase half of temporal induction (requires -maxsteps)\n");
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log("\n");
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log(" -tempinduct-inductonly\n");
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log(" Run only the induction half of temporal induction\n");
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log("\n");
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log(" -prove <signal> <value>\n");
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log(" Attempt to proof that <signal> is always <value>.\n");
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log("\n");
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@ -1030,6 +1036,7 @@ struct SatPass : public Pass {
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bool ignore_div_by_zero = false, set_init_undef = false, set_init_zero = false, max_undef = false;
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bool tempinduct = false, prove_asserts = false, show_inputs = false, show_outputs = false;
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bool ignore_unknown_cells = false, falsify = false, tempinduct_def = false, set_init_def = false;
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bool tempinduct_baseonly = false, tempinduct_inductonly = false;
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std::string vcd_file_name, json_file_name, cnf_file_name;
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log_header("Executing SAT pass (solving SAT problems in the circuit).\n");
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@ -1122,6 +1129,16 @@ struct SatPass : public Pass {
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tempinduct_def = true;
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continue;
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}
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if (args[argidx] == "-tempinduct-baseonly") {
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tempinduct = true;
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tempinduct_baseonly = true;
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continue;
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}
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if (args[argidx] == "-tempinduct-inductonly") {
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tempinduct = true;
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tempinduct_inductonly = true;
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continue;
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}
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if (args[argidx] == "-prove" && argidx+2 < args.size()) {
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std::string lhs = args[++argidx];
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std::string rhs = args[++argidx];
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@ -1305,7 +1322,8 @@ struct SatPass : public Pass {
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basecase.ignore_unknown_cells = ignore_unknown_cells;
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for (int timestep = 1; timestep <= seq_len; timestep++)
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basecase.setup(timestep);
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if (!tempinduct_inductonly)
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basecase.setup(timestep);
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inductstep.sets = sets;
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inductstep.prove = prove;
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@ -1319,8 +1337,10 @@ struct SatPass : public Pass {
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inductstep.satgen.ignore_div_by_zero = ignore_div_by_zero;
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inductstep.ignore_unknown_cells = ignore_unknown_cells;
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inductstep.setup(1);
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inductstep.ez->assume(inductstep.setup_proof(1));
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if (!tempinduct_baseonly) {
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inductstep.setup(1);
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inductstep.ez->assume(inductstep.setup_proof(1));
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}
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if (tempinduct_def) {
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std::vector<int> undef_state = inductstep.satgen.importUndefSigSpec(inductstep.satgen.initial_state.export_all(), 1);
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@ -1333,82 +1353,88 @@ struct SatPass : public Pass {
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// phase 1: proving base case
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basecase.setup(seq_len + inductlen);
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int property = basecase.setup_proof(seq_len + inductlen);
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basecase.generate_model();
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if (!tempinduct_inductonly)
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{
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basecase.setup(seq_len + inductlen);
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int property = basecase.setup_proof(seq_len + inductlen);
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basecase.generate_model();
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if (basecase_setup_init) {
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basecase.setup_init();
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basecase_setup_init = false;
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if (basecase_setup_init) {
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basecase.setup_init();
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basecase_setup_init = false;
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}
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if (inductlen > 1)
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basecase.force_unique_state(seq_len + 1, seq_len + inductlen);
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log("\n[base case] Solving problem with %d variables and %d clauses..\n",
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basecase.ez->numCnfVariables(), basecase.ez->numCnfClauses());
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if (basecase.solve(basecase.ez->NOT(property))) {
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log("SAT temporal induction proof finished - model found for base case: FAIL!\n");
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print_proof_failed();
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basecase.print_model();
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if(!vcd_file_name.empty())
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basecase.dump_model_to_vcd(vcd_file_name);
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if(!json_file_name.empty())
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basecase.dump_model_to_json(json_file_name);
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goto tip_failed;
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}
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if (basecase.gotTimeout)
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goto timeout;
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log("Base case for induction length %d proven.\n", inductlen);
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basecase.ez->assume(property);
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}
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if (inductlen > 1)
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basecase.force_unique_state(seq_len + 1, seq_len + inductlen);
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log("\n[base case] Solving problem with %d variables and %d clauses..\n",
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basecase.ez->numCnfVariables(), basecase.ez->numCnfClauses());
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if (basecase.solve(basecase.ez->NOT(property))) {
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log("SAT temporal induction proof finished - model found for base case: FAIL!\n");
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print_proof_failed();
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basecase.print_model();
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if(!vcd_file_name.empty())
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basecase.dump_model_to_vcd(vcd_file_name);
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if(!json_file_name.empty())
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basecase.dump_model_to_json(json_file_name);
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goto tip_failed;
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}
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if (basecase.gotTimeout)
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goto timeout;
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log("Base case for induction length %d proven.\n", inductlen);
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basecase.ez->assume(property);
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// phase 2: proving induction step
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inductstep.setup(inductlen + 1);
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property = inductstep.setup_proof(inductlen + 1);
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inductstep.generate_model();
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if (inductlen > 1)
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inductstep.force_unique_state(1, inductlen + 1);
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if (inductlen < initsteps)
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if (!tempinduct_baseonly)
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{
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log("\n[induction step] Skipping problem with %d variables and %d clauses (below initsteps).\n",
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inductstep.ez->numCnfVariables(), inductstep.ez->numCnfClauses());
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inductstep.ez->assume(property);
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}
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else
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{
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if (!cnf_file_name.empty())
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inductstep.setup(inductlen + 1);
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int property = inductstep.setup_proof(inductlen + 1);
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inductstep.generate_model();
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if (inductlen > 1)
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inductstep.force_unique_state(1, inductlen + 1);
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if (inductlen < initsteps)
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{
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FILE *f = fopen(cnf_file_name.c_str(), "w");
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if (!f)
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log_cmd_error("Can't open output file `%s' for writing: %s\n", cnf_file_name.c_str(), strerror(errno));
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log("Dumping CNF to file `%s'.\n", cnf_file_name.c_str());
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cnf_file_name.clear();
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inductstep.ez->printDIMACS(f, false);
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fclose(f);
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log("\n[induction step] Skipping problem with %d variables and %d clauses (below initsteps).\n",
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inductstep.ez->numCnfVariables(), inductstep.ez->numCnfClauses());
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inductstep.ez->assume(property);
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}
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else
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{
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if (!cnf_file_name.empty())
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{
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FILE *f = fopen(cnf_file_name.c_str(), "w");
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if (!f)
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log_cmd_error("Can't open output file `%s' for writing: %s\n", cnf_file_name.c_str(), strerror(errno));
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log("\n[induction step] Solving problem with %d variables and %d clauses..\n",
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inductstep.ez->numCnfVariables(), inductstep.ez->numCnfClauses());
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log("Dumping CNF to file `%s'.\n", cnf_file_name.c_str());
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cnf_file_name.clear();
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if (!inductstep.solve(inductstep.ez->NOT(property))) {
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if (inductstep.gotTimeout)
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goto timeout;
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log("Induction step proven: SUCCESS!\n");
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print_qed();
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goto tip_success;
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inductstep.ez->printDIMACS(f, false);
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fclose(f);
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}
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log("\n[induction step] Solving problem with %d variables and %d clauses..\n",
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inductstep.ez->numCnfVariables(), inductstep.ez->numCnfClauses());
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if (!inductstep.solve(inductstep.ez->NOT(property))) {
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if (inductstep.gotTimeout)
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goto timeout;
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log("Induction step proven: SUCCESS!\n");
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print_qed();
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goto tip_success;
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}
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log("Induction step failed. Incrementing induction length.\n");
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inductstep.ez->assume(property);
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inductstep.print_model();
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}
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log("Induction step failed. Incrementing induction length.\n");
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inductstep.ez->assume(property);
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inductstep.print_model();
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}
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}
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