* src/tgba/bdddict.cc, src/tgba/bdddict.cc (register_clone_acc):

New function.
* src/tgba/tgbaproduct.cc, src/tgba/tgbaproduct.hh: Use it to
distinguish acceptance conditions that are identical in both
operands.
* src/tgbatest/explpro4.test: New file.
* src/tgbatest/explpro2.test, src/tgbatest/Makefile.am: Adjust.

src/tgbatest/explpro4.test

@@ -0,0 +1,49 @@
+#!/bin/sh
+# Copyright (C) 2006  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.
+
+
+. ./defs
+
+set -e
+
+cat >input1 <<EOF
+acc = p1;
+s1, s1, "a", p1;
+s1, s1, "!a", ;
+EOF
+
+cat >input2 <<EOF
+acc= p1;
+s1, s1, "a", ;
+s1, s1, "!a", p1;
+EOF
+
+cat >expected <<'EOF'
+acc = "p1$1" "p1";
+"s1 * s1", "s1 * s1", "a", "p1";
+"s1 * s1", "s1 * s1", "!a", "p1$1";
+EOF
+
+run 0 ./explprod input1 input2 > stdout
+cat stdout
+diff stdout expected
+rm input1 input2 stdout expected