autfilt: new --separate-sets option

* src/twaalgos/sepsets.cc, src/twaalgos/sepsets.hh: New files.
* src/twaalgos/Makefile.am: Add them.
* src/twa/acc.hh (get_acceptance): Add a non-const version.
* src/bin/autfilt.cc: Add the --separate-sets option.
* src/tests/sepsets.test: New file.
* src/tests/Makefile.am: Add it.

src/tests/Makefile.am

@@ -204,6 +204,7 @@ TESTS_twa = \
   scc.test \
   sccdot.test \
   sccsimpl.test \
+  sepsets.test \
   dbacomp.test \
   obligation.test \
   wdba.test \

src/tests/sepsets.test

@@ -0,0 +1,66 @@
+#!/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
+
+cat >in <<EOF
+HOA: v1
+States: 3
+Start: 2
+AP: 3 "a" "b" "c"
+acc-name: Buchi
+Acceptance: 2 Fin(0)&Inf(1) | Fin(1)&Inf(0)
+--BODY--
+State: 0
+[0] 0 {1}
+[!0] 0 {0}
+State: 1
+[2] 0 {0}
+[1&!2] 1 {1}
+State: 2
+[2] 0
+[!0&1&!2] 1
+[0&!2] 2 {0 1}
+--END--
+EOF
+
+cat >expected <<EOF
+HOA: v1
+States: 3
+Start: 2
+AP: 3 "a" "b" "c"
+Acceptance: 4 (Fin(2) & Inf(1)) | (Fin(3) & Inf(0))
+properties: trans-labels explicit-labels trans-acc deterministic
+--BODY--
+State: 0
+[0] 0 {1 3}
+[!0] 0 {0 2}
+State: 1
+[2] 0 {0 2}
+[1&!2] 1 {1 3}
+State: 2
+[2] 0
+[!0&1&!2] 1
+[0&!2] 2 {0 1 2 3}
+--END--
+EOF
+
+run 0 ../../bin/autfilt --separate-sets in -H > out
+diff out expected