dstar2tgba: new command.

* src/bin/dstar2tgba.cc, src/bin/man/dstar2tgba.x: New files.
* src/bin/Makefile.am, src/bin/man/Makefile.am: Add them.
* NEWS: Mention it.
* src/bin/ltl2tgba.cc, src/tgbaalgos/stats.cc, doc/org/ltl2tgba.org:
Rename the %S sequence as %c, for consistency with dstar2tgba.
* src/tgbatest/ltl2dstar.test: Add more tests.
* src/tgbatest/ltl2dstar2.test: New file.
* src/tgbatest/Makefile.am: Add it.

src/tgbatest/Makefile.am

@@ -111,6 +111,7 @@ TESTS = \
   wdba2.test \
   babiak.test \
   ltl2dstar.test \
+  ltl2dstar2.test \
   randtgba.test \
   emptchk.test \
   emptchke.test \

src/tgbatest/ltl2dstar.test

@@ -33,6 +33,7 @@ ltl2tgba=../../bin/ltl2tgba
 ltlcross=../../bin/ltlcross
 randltl=../../bin/randltl
 ltlfilt=../../bin/ltlfilt
+dstar2tgba=../../bin/dstar2tgba
 
 $ltlfilt -f 'a U b' -l |
 ltl2dstar --ltl2nba=spin:$ltl2tgba@-s - - |
@@ -62,11 +63,16 @@ EOF
 
 diff expected out
 
+RAB=--automata=rabin
+STR=--automata=streett
+
 $randltl -n 15 a b | $ltlfilt --nnf --remove-wm |
 $ltlcross -F - -f 'GFa & GFb & GFc' -f '(GFa -> GFb) & (GFc -> GFd)' \
---timeout=10 \
+--timeout=30 \
 "$ltl2tgba -s %f >%N" \
-"ltl2dstar --automata=rabin --output=nba --ltl2nba=spin:$ltl2tgba@-s %L %T" \
-"ltl2dstar --automata=rabin --ltl2nba=spin:$ltl2tgba@-s %L %D" \
-"ltl2dstar --automata=streett --output=nba --ltl2nba=spin:$ltl2tgba@-s %L %T" \
-"ltl2dstar --automata=streett --ltl2nba=spin:$ltl2tgba@-s %L %D"
+"ltl2dstar $RAB --output=nba --ltl2nba=spin:$ltl2tgba@-s %L %T" \
+"ltl2dstar $RAB --ltl2nba=spin:$ltl2tgba@-s %L %D" \
+"ltl2dstar $RAB --ltl2nba=spin:$ltl2tgba@-s %L - | $dstar2tgba --low -s >%N" \
+"ltl2dstar $STR --output=nba --ltl2nba=spin:$ltl2tgba@-s %L %T" \
+"ltl2dstar $STR --ltl2nba=spin:$ltl2tgba@-s %L %D" \
+"ltl2dstar $STR --ltl2nba=spin:$ltl2tgba@-s %L - | $dstar2tgba --low -s >%N"

src/tgbatest/ltl2dstar2.test

@@ -0,0 +1,77 @@
+#!/bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2013 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/>.
+
+# Do some quick translations to make sure the neverclaims produced by
+# spot actually look correct!  We do that by parsing them via ltlcross.
+# ltl2neverclaim-lbtt.test does the same with LBTT if it is installed.
+
+. ./defs
+set -e
+
+# Skip this test if ltl2dstar is not installed.
+(ltl2dstar --version) || exit 77
+
+ltlfilt=../../bin/ltlfilt
+ltl2tgba=../../bin/ltl2tgba
+dstar2tgba=../../bin/dstar2tgba
+randltl=../../bin/randltl
+
+
+# Make sure all recurrence formulas are translated into deterministic
+# Büchi automata by the DRA->TGBA converster.
+
+$randltl -n -1 a b --tree-size=5..15 |
+$ltlfilt --syntactic-recurrence --remove-wm -r -u \
+         --size-min=4 --size-max=15 --relabel=abc |
+head -n 20 > formulas
+
+$randltl -n -1 a b --tree-size=5..15 |
+$ltlfilt -v --obligation |
+$ltlfilt --syntactic-recurrence --remove-wm -r -u \
+         --size-min=4 --size-max=15 --relabel=abc |
+head -n 20 >> formulas
+
+while read f; do
+  $ltlfilt -f "$f" -l |
+  ltl2dstar --ltl2nba=spin:$ltl2tgba@-s - foo
+  echo "$f"
+  det=`$dstar2tgba foo --stats '%d'`
+  test $det -eq 1;
+done < formulas
+
+
+# Now make sure that some obviously non-deterministic property
+# are not translated to deterministic.
+
+cat >formulas <<EOF
+FGa
+GFa->GFb
+GFa & FGb
+FGa | FGb
+FGa & FGb
+EOF
+
+while read f; do
+  $ltlfilt -f "$f" -l |
+  ltl2dstar --ltl2nba=spin:$ltl2tgba@-s - foo
+  echo "$f"
+  det=`$dstar2tgba foo --stats '%d'`
+  test $det -eq 0;
+done < formulas