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Added "sat -dump_cnf"

This commit is contained in:
Clifford Wolf 2014-02-18 09:29:08 +01:00
parent 32af10fa9b
commit a78bba1f5c
1 changed files with 34 additions and 5 deletions
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39
passes/sat/sat.cc
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@ -878,6 +878,10 @@ struct SatPass : public Pass {
log(" -dump_vcd <vcd-file-name>\n");
log(" dump SAT model (counter example in proof) to VCD file\n");
log("\n");
log(" -dump_cnf <cnf-file-name>\n");
log(" dump CNF of SAT problem (in DIMACS format). in temporal induction\n");
log(" proofs this is the CNF of the first induction step.\n");
log("\n");
log("The following additional options can be used to set up a proof. If also -seq\n");
log("is passed, a temporal induction proof is performed.\n");
log("\n");
@ -933,7 +937,7 @@ struct SatPass : public Pass {
bool ignore_div_by_zero = false, set_init_undef = false, set_init_zero = false, max_undef = false;
bool tempinduct = false, prove_asserts = false, show_inputs = false, show_outputs = false;
bool ignore_unknown_cells = false, falsify = false, tempinduct_def = false, set_init_def = false;
std::string vcd_file_name;
std::string vcd_file_name, cnf_file_name;
log_header("Executing SAT pass (solving SAT problems in the circuit).\n");
@ -1115,6 +1119,10 @@ struct SatPass : public Pass {
vcd_file_name = args[++argidx];
continue;
}
if (args[argidx] == "-dump_cnf" && argidx+1 < args.size()) {
cnf_file_name = args[++argidx];
continue;
}
break;
}
extra_args(args, argidx, design);
@ -1255,6 +1263,19 @@ struct SatPass : public Pass {
}
else
{
if (!cnf_file_name.empty())
{
FILE *f = fopen(cnf_file_name.c_str(), "w");
if (!f)
log_cmd_error("Can't open output file `%s' for writing: %s\n", cnf_file_name.c_str(), strerror(errno));
log("Dumping CNF to file `%s'.\n", cnf_file_name.c_str());
cnf_file_name.clear();
inductstep.ez.printDIMACS(f, false);
fclose(f);
}
log("\n[induction step] Solving problem with %d variables and %d clauses..\n",
inductstep.ez.numCnfVariables(), inductstep.ez.numCnfClauses());
@ -1333,10 +1354,18 @@ struct SatPass : public Pass {
}
sathelper.generate_model();
#if 0
// print CNF for debugging
sathelper.ez.printDIMACS(stdout, true);
#endif
if (!cnf_file_name.empty())
{
FILE *f = fopen(cnf_file_name.c_str(), "w");
if (!f)
log_cmd_error("Can't open output file `%s' for writing: %s\n", cnf_file_name.c_str(), strerror(errno));
log("Dumping CNF to file `%s'.\n", cnf_file_name.c_str());
cnf_file_name.clear();
sathelper.ez.printDIMACS(f, false);
fclose(f);
}
int rerun_counter = 0;