* src/tgbaalgos/emptiness_stats.hh: Make sure depth() >= 0.

* src/tgbaalgos/gtec/gtec.hh (couvreur99_check, couvreur99_check_shy):
Add the poprem option.
* src/tgbaalgos/gtec/gtec.cc: Implement it.
* src/tgbaalgos/gtec/sccstack.cc, src/tgbaalgos/gtec/sccstack.hh
(scc_stack::rem, scc_stack::clear_rem,
scc_stack::connected_component::rem): New.
* src/tgbatest/ltl2tgba.cc, src/tgbatest/randtgba.cc: Add rem variants.

bench/emptchk/ltl-human.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+# Copyright (C) 2005  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
+
+opts="-1 -D -e 15 -n 1024 -t 0.5 -r -z -i $FORMULAE"
+
+echo "WITHOUT ADDITIONAL ACCEPTING CONDITIONS"
+
+for d in 0.001 0.002 0.1; do
+  echo "density: $d"
+  $RANDTGBA -d $d $opts
+done
+
+echo "WITH 3 ADDITIONAL ACCEPTING CONDITIONS"
+
+for d in 0.001 0.002 0.1; do
+  echo "density: $d"
+  $RANDTGBA -a 3 0.0133333 -d $d $opts
+done