Add 2 benchmarks directories.

Add an algorithm to split an automaton in several automata.

* bench/scc-stats: New directory.  Contains input files and test
program for computing statistics.
* bench/split-product: New directory.  Contains test program for
synchronised product on splitted automata.
* bench/split-product/models: New directory.  Contains Promela
files and LTL formulae that should be verified by the models.
* src/tgba/tgbafromfile.cc, src/tgba/tgbafromfile.hh:
New files.  Small class to avoid long initializations with numerous
constants when translating to TGBA many LTL formulae from a
given file.
* src/tgbaalgos/cutscc.cc, src/tgbaalgos/cutscc.hh:
New file.  From a single automaton, create, at most,
X sub automata.
* src/tgbaalgos/scc.cc, src/tgbaalgos/scc.hh:
Adjust to compute self-loops count.

src/tgba/Makefile.am

@@ -45,7 +45,8 @@ tgba_HEADERS = \
   tgbaexplicit.hh \
   tgbaproduct.hh \
   tgbatba.hh \
-  tgbareduc.hh
+  tgbareduc.hh \
+  tgbafromfile.hh
 
 noinst_LTLIBRARIES = libtgba.la
 libtgba_la_SOURCES = \
@@ -65,4 +66,5 @@ libtgba_la_SOURCES = \
   tgbaexplicit.cc \
   tgbaproduct.cc \
   tgbatba.cc \
-  tgbareduc.cc
+  tgbareduc.cc \
+  tgbafromfile.cc

src/tgba/tgbafromfile.cc

@@ -0,0 +1,97 @@
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Laboratoire
+// d'Informatique de Paris 6 (LIP6), département Systèmes Répartis
+// Coopératifs (SRC), Université Pierre et Marie Curie.
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#include "tgba/public.hh"
+#include "tgbafromfile.hh"
+#include "ltlvisit/destroy.hh"
+
+namespace spot
+{
+  ltl_file::ltl_file(const char* filename, bdd_dict* dict)
+  {
+    input_file_.open(filename);
+    assert(input_file_.is_open());
+    done_ = false;
+    env_ = &(ltl::default_environment::instance());
+    dict_ = dict;
+    f_ = 0;
+    fm_exprop_opt_ = false;
+    fm_symb_merge_opt_ = true;
+    post_branching_ = false;
+    fair_loop_approx_ = false;
+    containment_ = false;
+    unobservables_ = 0;
+    fm_red_ = ltl::Reduce_None;
+  }
+
+  ltl_file::~ltl_file()
+  {
+    input_file_.close();
+  }
+
+  bool ltl_file::done()
+  {
+    return(input_file_.eof());
+  }
+
+  void ltl_file::next()
+  {
+    if (f_)
+    {
+      ltl::destroy(f_);
+      f_ = 0;
+    }
+    std::string line = "";
+    while (line == "" && !input_file_.eof())
+      getline(input_file_, line);
+    formula_ = line;
+  }
+
+  void ltl_file::begin()
+  {
+    next();
+  }
+
+  tgba* ltl_file::current_automaton()
+  {
+    spot::tgba* a = 0;
+    f_ = spot::ltl::parse(formula_, pel_, *env_, false);
+    if (spot::ltl::format_parse_errors(std::cerr, formula_, pel_))
+      return 0;
+    // Generate the automaton corresponding to the formula
+    a = spot::ltl_to_tgba_fm(f_, dict_, fm_exprop_opt_,
+			     fm_symb_merge_opt_, post_branching_,
+			     fair_loop_approx_, unobservables_,
+			     fm_red_, containment_);
+    return a;
+  }
+
+  ltl::formula* ltl_file::current_formula()
+  {
+    return f_;
+  }
+
+  std::string ltl_file::current_formula_string()
+  {
+    return formula_;
+  }
+}
+

src/tgba/tgbafromfile.hh

@@ -0,0 +1,63 @@
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Laboratoire
+// d'Informatique de Paris 6 (LIP6), département Systèmes Répartis
+// Coopératifs (SRC), Université Pierre et Marie Curie.
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#ifndef SPOT_TGBA_TGBAFROMFILE_HH
+# define SPOT_TGBA_TGBAFROMFILE_HH
+#include <iosfwd>
+#include <fstream>
+#include "tgba/public.hh"
+#include "tgbaalgos/ltl2tgba_fm.hh"
+#include "tgbaalgos/save.hh"
+#include "ltlparse/public.hh"
+
+namespace spot
+{
+  class ltl_file
+  {
+  public:
+    ltl_file(const char* filename, bdd_dict* dict);
+    ~ltl_file();
+    bool done();
+    void next();
+    void begin();
+    tgba* current_automaton();
+    std::string current_formula_string();
+    ltl::formula* current_formula();
+  private:
+    bool done_;
+    std::string formula_;
+    ltl::formula* f_;
+    std::ifstream input_file_;
+    ltl::parse_error_list pel_;
+    ltl::environment* env_;
+    bdd_dict* dict_;
+    bool fm_exprop_opt_;
+    bool fm_symb_merge_opt_;
+    bool post_branching_;
+    bool fair_loop_approx_;
+    bool containment_;
+    ltl::atomic_prop_set* unobservables_;
+    int fm_red_;
+  };
+}
+
+
+#endif // SPOT_TGBA_TGBAFROMFILE_HH