* src/bin/ltlcheck.cc: Add a --no-checks option.

src/bin/ltlcheck.cc

@@ -79,11 +79,10 @@ Exit status:\n\
 #define OPT_JSON 3
 #define OPT_CSV 4
 #define OPT_DUPS 5
+#define OPT_NOCHECKS 6
 
 static const argp_option options[] =
   {
-    { "allow-dups", OPT_DUPS, 0, 0,
-      "translate duplicate formulas in input", 1 },
     /**************************************************/
     { 0, 0, 0, 0, "Specifying translator to call:", 2 },
     { "translator", 't', "COMMANDFMT", 0,
@@ -104,14 +103,21 @@ static const argp_option options[] =
       "not use LBT-style atomic propositions (i.e. p0, p1, ...) will be "
       "relabeled automatically.", 0 },
     /**************************************************/
-    { 0, 0, 0, 0, "State-space generation:", 4 },
+    { 0, 0, 0, 0, "ltlcheck behavior:", 4 },
+    { "allow-dups", OPT_DUPS, 0, 0,
+      "translate duplicate formulas in input", 0 },
+    { "no-checks", OPT_NOCHECKS, 0, 0,
+      "do not perform any sanity checks (negated formulas "
+      "will not be translated)", 0 },
+    /**************************************************/
+    { 0, 0, 0, 0, "State-space generation:", 5 },
     { "states", OPT_STATES, "INT", 0,
       "number of the states in the state-spaces (200 by default)", 0 },
     { "density", OPT_DENSITY, "FLOAT", 0,
       "probability, between 0.0 and 1.0, to add a transition between "
       "two states (0.1 by default)", 0 },
     /**************************************************/
-    { 0, 0, 0, 0, "Statistics ouput:", 5 },
+    { 0, 0, 0, 0, "Statistics output:", 6 },
     { "json", OPT_JSON, "FILENAME", OPTION_ARG_OPTIONAL,
       "output statistics as JSON in FILENAME or on standard output", 0 },
     { "csv", OPT_CSV, "FILENAME", OPTION_ARG_OPTIONAL,
@@ -135,6 +141,7 @@ const char* json_output = 0;
 const char* csv_output = 0;
 bool want_stats = false;
 bool allow_dups = false;
+bool no_checks = false;
 
 typedef Sgi::hash_set<const spot::ltl::formula*,
 		      const spot::ptr_hash<const spot::ltl::formula> > fset_t;
@@ -275,6 +282,9 @@ parse_opt(int key, char* arg, struct argp_state*)
       want_stats = true;
       json_output = arg ? arg : "-";
       break;
+    case OPT_NOCHECKS:
+      no_checks = true;
+      break;
     case OPT_STATES:
       states = to_pos_int(arg);
       break;
@@ -780,12 +790,10 @@ namespace
 
 
       unsigned n = vstats.size();
-      vstats.resize(n + 2);
+      vstats.resize(n + (no_checks ? 1 : 2));
       statistics_formula* pstats = &vstats[n];
-      statistics_formula* nstats = &vstats[n + 1];
+      statistics_formula* nstats = 0;
       pstats->resize(m);
-      nstats->resize(m);
-
       formulas.push_back(fstr);
 
       for (size_t n = 0; n < m; ++n)
@@ -793,6 +801,13 @@ namespace
 
       // ---------- Negative Formula ----------
 
+      // The negative formula is only needed when checks are
+      // activated.
+      if (!no_checks)
+	{
+	  nstats = &vstats[n + 1];
+	  nstats->resize(m);
+
 	  const spot::ltl::formula* nf =
 	    spot::ltl::unop::instance(spot::ltl::unop::Not, f->clone());
 
@@ -811,13 +826,17 @@ namespace
 
 	  for (size_t n = 0; n < m; ++n)
 	    neg[n] = runner.translate(n, 'N', nstats);
+	  nf->destroy();
+	}
 
+      f->destroy();
       runner.round_cleanup();
       ++round;
 
-      std::cerr << "Sanity checks..." << std::endl;
-
-      spot::ltl::atomic_prop_set* ap = spot::ltl::atomic_prop_collect(f);
+      if (!no_checks)
+	{
+	  std::cerr << "Performing sanity checks and gathering statistics..."
+		    << std::endl;
 
 	  // intersection test
 	  for (size_t i = 0; i < m; ++i)
@@ -832,9 +851,16 @@ namespace
 				     << " is nonempty\n";
 		    delete prod;
 		  }
+	}
+      else
+	{
+	  std::cerr << "Gathering statistics..." << std::endl;
+	}
 
       // build products with a random state-space.
+      spot::ltl::atomic_prop_set* ap = spot::ltl::atomic_prop_collect(f);
       spot::tgba* statespace = spot::random_graph(states, density, ap, &dict);
+      delete ap;
 
       std::vector<spot::tgba*> pos_prod(m);
       std::vector<spot::tgba*> neg_prod(m);
@@ -858,6 +884,7 @@ namespace
 		(*pstats)[i].product_transitions = s.transitions;
 	      }
 	  }
+      if (!no_checks)
 	for (size_t i = 0; i < m; ++i)
 	  if (neg[i])
 	    {
@@ -877,6 +904,8 @@ namespace
 		}
 	    }
 
+      if (!no_checks)
+	{
 	  // cross-comparison test
 	  cross_check(pos_map, 'P');
 	  cross_check(neg_map, 'N');
@@ -887,28 +916,24 @@ namespace
 		!(consistency_check(pos_map[i], neg_map[i], statespace)))
 	      global_error() << "error: inconsistency between P" << i
 			     << " and N" << i << "\n";
+	}
 
       // Cleanup.
-      delete ap;
-      nf->destroy();
-      f->destroy();
 
+      if (!no_checks)
 	for (size_t n = 0; n < m; ++n)
 	{
 	  delete neg_map[n];
 	  delete neg_prod[n];
-	  delete pos_map[n];
-	  delete pos_prod[n];
+	  delete neg[n];
 	}
-
-      delete statespace;
-
       for (size_t n = 0; n < m; ++n)
 	{
-	  delete neg[n];
+	  delete pos_map[n];
+	  delete pos_prod[n];
 	  delete pos[n];
 	}
-
+      delete statespace;
       std::cerr << std::endl;
       return 0;
     }