Fix translation of !{r}.

We need a marked version of !{r} to perform breakpoint unroling.

* src/ltlast/unop.cc, src/ltlast/unop.hh: Declare a NegClosureMarked
operator.
* src/ltlvisit/mark.hh, src/ltlvisit/mark.cc,
src/tgbaalgos/ltl2tgba_fm.cc: Adjust to deal with NegClosureMarked
and NegClosure as apropriate.
* src/ltlvisit/simplify.cc, src/ltlvisit/tostring.cc,
src/ltlvisit/tunabbrev.cc, src/tgbaalgos/eltl2tgba_lacim.cc,
src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_lacim.cc,
src/tgba/formula2bdd.cc: Deal with NegClosureMarked in the same way as
we deal with NegClosure.
* src/tgbatest/ltl2tgba.test: More tests.
* src/ltltest/kind.test: Adjust.
* doc/tl/tl.tex: Mention the marked negated closure.

src/tgbatest/ltl2tgba.test

@@ -1,8 +1,9 @@
 #!/bin/sh
-# Copyright (C) 2009, 2010, 2011 Laboratoire de Recherche et Développement
-# de l'Epita (LRDE).
+# -*- coding: utf-8 -*-
+# Copyright (C) 2009, 2010, 2011, 2012 Laboratoire de Recherche et
+# Développement de l'Epita (LRDE).
 # Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
-# département Systèmes Répartis Coopératifs (SRC), Université Pierre
+# département Systèmes Répartis Coopératifs (SRC), Université Pierre
 # et Marie Curie.
 #
 # This file is part of Spot, a model checking library.
@@ -108,6 +109,16 @@ check_psl '{((a&!b);((!a&!b)*))&&(!b*;(!a&b))}'
 # other side.
 check_psl '{c;a;(f&!f)[=2];c}|{b;a;(!f&f)[=2];c}'
 
+
+# these were mis-translated in Spot 0.9
+check_psl 'G!{(b;1)*;a}'
+check_psl '(G!{(b;1)*;a} && ({1;1[*3]*}[]->{(b&!a)[*2];!b&!a}))'
+# In particular, Spot 0.9 would incorrectly reject the sequence:
+# (a̅b;a̅b;a̅b̅);(a̅b;a̅b;a̅b̅);(a̅b;a̅b;a̅b̅);... in 'G!{(b;1)*;a}'
+# This means the following automaton was incorrectly empty in Spot 0.9.
+run 0 ../ltl2tgba -e -R3 '(G!{(b;1)*;a} && ({1;1[*3]*}[]->{(b&!a)[*2];!b&!a}))'
+
+
 # Make sure 'a U (b U c)' has 3 states and 6 transitions,
 # before and after degeneralization.
 for opt in '' -D -DS; do