autfilt: add a --sbacc option

... to force automata into state-based acceptance.

* src/tgbaalgos/sbacc.cc, src/tgbaalgos/sbacc.hh,
src/tgbatest/sbacc.test: New files.
* src/tgbaalgos/Makefile.am, src/tgbatest/Makefile.am: Add
them.
* src/tgba/tgbagraph.hh (copy_acceptance_conditions_of):
Call set_acceptance_conditions().
* src/bin/autfilt.cc: Add option --sbacc.

src/bin/autfilt.cc

@@ -47,6 +47,7 @@
 #include "tgbaalgos/are_isomorphic.hh"
 #include "tgbaalgos/canonicalize.hh"
 #include "tgbaalgos/mask.hh"
+#include "tgbaalgos/sbacc.hh"
 
 
 static const char argp_program_doc[] ="\
@@ -74,6 +75,7 @@ Exit status:\n\
 #define OPT_IS_EMPTY 15
 #define OPT_INTERSECT 16
 #define OPT_MASK_ACC 17
+#define OPT_SBACC 18
 
 static const argp_option options[] =
   {
@@ -105,6 +107,9 @@ static const argp_option options[] =
     { "destut", OPT_DESTUT, 0, 0, "allow less stuttering", 0 },
     { "mask-acc", OPT_MASK_ACC, "NUM[,NUM...]", 0,
       "remove all transitions in specified acceptance sets", 0 },
+    { "state-based-acceptance", OPT_SBACC, 0, 0,
+      "define the acceptance using states", 0 },
+    { "sbacc", 0, 0, OPTION_ALIAS, 0, 0 },
     /**************************************************/
     { 0, 0, 0, 0, "Filtering options:", 6 },
     { "are-isomorphic", OPT_ARE_ISOMORPHIC, "FILENAME", 0,
@@ -172,6 +177,7 @@ static int opt_max_count = -1;
 static bool opt_destut = false;
 static char opt_instut = 0;
 static bool opt_is_empty = false;
+static bool opt_sbacc = false;
 static std::unique_ptr<unique_aut_t> opt_uniq = nullptr;
 static spot::acc_cond::mark_t opt_mask_acc = 0U;
 
@@ -299,6 +305,9 @@ parse_opt(int key, char* arg, struct argp_state*)
 	  randomize_st = true;
 	}
       break;
+    case OPT_SBACC:
+      opt_sbacc = true;
+      break;
     case OPT_SEED:
       opt_seed = to_int(arg);
       break;
@@ -399,6 +408,9 @@ namespace
       if (opt_product)
 	aut = spot::product(std::move(aut), opt_product);
 
+      if (opt_sbacc)
+	aut = spot::sbacc(aut);
+
       aut = post.run(aut, nullptr);
 
       if (randomize_st || randomize_tr)

src/tgba/tgbagraph.hh

@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2014 Laboratoire de Recherche et Développement de
-// l'Epita.
+// Copyright (C) 2014, 2015 Laboratoire de Recherche et Développement
+// de l'Epita.
 //
 // This file is part of Spot, a model checking library.
 //
@@ -429,8 +429,7 @@ namespace spot
     /// \brief Copy the acceptance conditions of another tgba.
     void copy_acceptance_conditions_of(const const_tgba_ptr& a)
     {
-      assert(acc_.num_sets() == 0);
-      acc_.add_sets(a->acc().num_sets());
+      set_acceptance_conditions(a->acc().num_sets());
     }
 
     void copy_ap_of(const const_tgba_ptr& a)

src/tgbaalgos/Makefile.am

@@ -64,6 +64,7 @@ tgbaalgos_HEADERS = \
   relabel.hh \
   replayrun.hh \
   safety.hh \
+  sbacc.hh \
   sccfilter.hh \
   scc.hh \
   sccinfo.hh \
@@ -115,6 +116,7 @@ libtgbaalgos_la_SOURCES = \
   replayrun.cc \
   relabel.cc \
   safety.cc \
+  sbacc.cc \
   scc.cc \
   sccinfo.cc \
   sccfilter.cc \

src/tgbaalgos/sbacc.cc

@@ -0,0 +1,79 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2015 Laboratoire de Recherche et Développement
+// de l'Epita.
+//
+// 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 3 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <vector>
+#include <map>
+#include <utility>
+#include "sbacc.hh"
+
+namespace spot
+{
+  tgba_digraph_ptr sbacc(tgba_digraph_ptr& old)
+  {
+    if (old->has_state_based_acc())
+      return old;
+
+    auto res = make_tgba_digraph(old->get_dict());
+    res->copy_ap_of(old);
+    res->copy_acceptance_conditions_of(old);
+
+    typedef std::pair<unsigned, acc_cond::mark_t> pair_t;
+    std::map<pair_t, unsigned> s2n;
+
+    std::vector<std::pair<pair_t, unsigned>> todo;
+
+    auto new_state =
+      [&](unsigned state, acc_cond::mark_t m) -> unsigned
+      {
+	pair_t x(state, m);
+	auto p = s2n.emplace(x, 0);
+	if (p.second)		// This is a new state
+	  {
+	    unsigned s = res->new_state();
+	    p.first->second = s;
+	    todo.emplace_back(x, s);
+	  }
+	return p.first->second;
+      };
+
+    // Find any transition going into the initial state, and use its
+    // acceptance as mark.
+    acc_cond::mark_t init_acc = 0U;
+    unsigned old_init = old->get_init_state_number();
+    for (auto& t: old->transitions())
+      if (t.dst == old_init)
+	{
+	  init_acc = t.acc;
+	  break;
+	}
+
+    res->set_init_state(new_state(old_init, init_acc));
+    while (!todo.empty())
+      {
+	auto one = todo.back();
+	todo.pop_back();
+	for (auto& t: old->out(one.first.first))
+	  res->new_transition(one.second,
+			      new_state(t.dst, t.acc),
+			      t.cond,
+			      one.first.second);
+      }
+    return res;
+  }
+}

src/tgbaalgos/sbacc.hh

@@ -0,0 +1,33 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2015 Laboratoire de Recherche et Développement
+// de l'Epita.
+//
+// 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 3 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef SPOT_TGBAALGOS_SBACC_HH
+# define SPOT_TGBAALGOS_SBACC_HH
+
+#include "tgba/tgbagraph.hh"
+
+namespace spot
+{
+  /// \brief Transform an automaton to use state-based acceptance
+  ///
+  /// This is independent on the acceptance condition used.
+  SPOT_API tgba_digraph_ptr sbacc(tgba_digraph_ptr& aut);
+}
+
+#endif // SPOT_TGBAALGOS_COMPLETE_HH

src/tgbatest/Makefile.am

@@ -112,6 +112,7 @@ TESTS = \
   randtgba.test \
   isomorph.test \
   uniq.test \
+  sbacc.test \
   stutter.test \
   emptchk.test \
   emptchke.test \

src/tgbatest/sbacc.test

@@ -0,0 +1,108 @@
+#! /bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2015 Laboratoire de Recherche et Développement
+# de l'Epita (LRDE).
+#
+# 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 3 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. ./defs || exit 1
+
+set -e
+
+ltl2tgba=../../bin/ltl2tgba
+autfilt=../../bin/autfilt
+
+$ltl2tgba 'GFa & GFb' -H | run 0 $autfilt --sbacc -H > out.hoa
+
+cat >expected<<EOF
+HOA: v1
+States: 4
+Start: 0
+AP: 2 "a" "b"
+acc-name: generalized-Buchi 2
+Acceptance: 2 Inf(0)&Inf(1)
+properties: trans-labels explicit-labels state-acc complete deterministic
+--BODY--
+State: 0 {0 1}
+[0&1] 0
+[!0&!1] 1
+[!0&1] 2
+[0&!1] 3
+State: 1
+[0&1] 0
+[!0&!1] 1
+[!0&1] 2
+[0&!1] 3
+State: 2 {1}
+[0&1] 0
+[!0&!1] 1
+[!0&1] 2
+[0&!1] 3
+State: 3 {0}
+[0&1] 0
+[!0&!1] 1
+[!0&1] 2
+[0&!1] 3
+--END--
+EOF
+
+diff out.hoa expected
+
+
+cat >in.hoa<<EOF
+HOA: v1
+Start: 0
+AP: 1 "a"
+Acceptance: 2 Inf(0)&Inf(1)
+--BODY--
+State: 0
+[0] 1
+State: 1 {0}
+[0] 2
+State: 2
+[0] 0 {1}
+--END--
+EOF
+
+run 0 $autfilt --state-based-acceptance in.hoa -H > out.hoa
+
+cat >expected <<EOF
+HOA: v1
+States: 3
+Start: 0
+AP: 1 "a"
+acc-name: generalized-Buchi 2
+Acceptance: 2 Inf(0)&Inf(1)
+properties: trans-labels explicit-labels state-acc deterministic
+--BODY--
+State: 0 {1}
+[0] 1
+State: 1
+[0] 2
+State: 2 {0}
+[0] 0
+--END--
+EOF
+
+diff out.hoa expected
+
+$autfilt --sba -H expected > out.hoa
+diff out.hoa expected
+
+
+
+../../bin/randltl --weak-fairness -n 20 2 |
+../../bin/ltlcross "$ltl2tgba -DH %f >%O" "$ltl2tgba -H %f | $autfilt -H >%O"