* src/tgbaalgos/tarjan_on_fly.hh,

src/tgbaalgos/tarjan_on_fly.cc, src/tgbaalgos/nesteddfs.hh, src/tgbaalgos/nesteddfs.cc, src/tgbaalgos/minimalce.hh, src/tgbaalgos/minimalce.cc, src/tgbaalgos/colordfs.hh, src/tgbaalgos/colordfs.cc: four new algorithms for emptyness check. src/tgbaalgos/gtec/ce.hh, src/tgbaalgos/gtec/ce.cc: Adapt the counter exemple for the ce object in minimalce.hh. src/tgbatest/ltl2tgba.cc, src/tgbatest/emptchk.test, src/tgbaalgos/Makefile.am: Add files for emptyness-check. * src/tgbaalgos/reductgba_sim_del.cc: Restrict to degeneralize automata. * src/tgba/tgbareduc.hh: src/tgba/tgbareduc.cc: Merge transition for scc reduce.
2004-08-23 12:48:33 +00:00 · 2004-08-23 12:48:33 +00:00 · 2d1151e018
commit 2d1151e018
parent 3d2135c883
17 changed files with 2526 additions and 157 deletions
--- a/src/tgbaalgos/tarjan_on_fly.hh
+++ b/src/tgbaalgos/tarjan_on_fly.hh
@ -0,0 +1,94 @@
+// Copyright (C) 2004  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_TGBAALGOS_TARJAN_ON_FLY_HH
+# define SPOT_TGBAALGOS_TARJAN_ON_FLY_HH
+
+#include "misc/hash.hh"
+#include <list>
+#include <utility>
+#include <ostream>
+#include "tgba/tgbatba.hh"
+//#include "tgba/bddprint.hh"
+#include "tgbaalgos/minimalce.hh"
+
+namespace spot
+{
+
+  class tarjan_on_fly: public emptyness_search
+  {
+
+  public:
+
+    tarjan_on_fly(const tgba_tba_proxy *a);
+    virtual ~tarjan_on_fly();
+
+    /// \brief Find a counter example.
+    virtual ce::counter_example* check();
+
+    /// \brief Print Stat.
+    std::ostream& print_stat(std::ostream& os) const;
+
+  private:
+
+    struct struct_state
+    {
+      const state* s;
+      tgba_succ_iterator* lasttr;
+      int lowlink;
+      int pre;
+      int acc;
+
+      int pos;
+    };
+
+    //typedef std::pair<int, tgba_succ_iterator*> state_iter_pair;
+    typedef Sgi::hash_map<const state*, int,
+			  state_ptr_hash, state_ptr_equal> hash_type;
+    hash_type h;		///< Map of visited states.
+
+
+    //typedef std::pair<const state*, struct_state> pair_type;
+    typedef std::vector<struct_state> stack_type;
+    stack_type stack;		///< Stack of visited states on the path.
+
+    const tgba_tba_proxy* a;	///< The automata to check.
+
+    int top;
+    int dftop;
+    bool violation;
+
+    const state* x;
+    ce::counter_example* ce;
+
+    void push(const state* s);
+    void pop();
+    void lowlinkupdate(int f, int t);
+    int in_stack(const state* s) const;
+
+    ce::counter_example* build_counter();
+    clock_t tps_;
+
+  };
+
+}
+
+#endif // SPOT_TGBAALGOS_MINIMALCE_HH