diff --git a/bench/ltl2tgba/Makefile.am b/bench/ltl2tgba/Makefile.am
index 6bdcee220..fb59e7fb2 100644
--- a/bench/ltl2tgba/Makefile.am
+++ b/bench/ltl2tgba/Makefile.am
@@ -4,7 +4,8 @@ EXTRA_DIST = \
   formulae.ltl \
   known \
   parseout.pl \
-  small
+  small \
+  lbtt2csv.pl
 CLEAN_FILES = \
   big.cfg big.log big.txt \
   small.cfg small.log small.txt \
diff --git a/bench/ltl2tgba/lbtt2csv.pl b/bench/ltl2tgba/lbtt2csv.pl
new file mode 100755
index 000000000..027a1c6dd
--- /dev/null
+++ b/bench/ltl2tgba/lbtt2csv.pl
@@ -0,0 +1,130 @@
+#! /usr/bin/perl -w
+
+# Copyright (C) 2012 Laboratoire de Recherche et Développement de
+# l'Epita.
+#
+# 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.
+
+
+# This script reads the output of the files "*.log" given in arguments
+# and output it in a csv format on stdout.
+# If you give the option `-p' as the first argument of this program,
+# you'll get only the positive formulae, while `-n' gives the negative
+# ones. If you give several of them, you'll get only the last you asked for.
+#
+# As an example: "./lbtt2csv.pl -n -n -p -n -p foo.log" will output only
+# the positive formulae.
+
+
+use strict;
+
+our $no_positive = undef;
+our $no_negative = undef;
+
+# Get a block and return the number of states, transition of the
+# automaton and of the product, and the time too.
+sub work_on_formula_in_algo($)
+{
+  my ($content) = @_;
+
+  my ($states) = ($$content =~ /number of states:\s+(\d+?)\n/ms);
+  my ($tr) = ($$content =~ /number of transitions:\s+(\d+)\n/ms);
+  my ($acc_set) = ($$content =~ /acceptance sets:\s+(\d+)\n/ms);
+  my ($det) = ($$content =~ /is deterministic:\s+(\w+)\n/ms);
+  my ($nb_det) = ($$content =~ /nondeterminism index:\s+(\d+)\n/ms);
+  my ($time) = ($$content =~ /time:\s+(\d+\.\d+)/ms);
+  $$content = $'; #'
+
+  my ($product_st) = ($$content =~ /number of states:\s+(\d+)/ms);
+  my ($product_tr) = ($$content =~ /number of transitions:\s+(\d+)\n/ms);
+
+  $$content =~ /Negated formula:\n/ms;
+  $$content = $'; #'
+
+  return ($states, $tr, $acc_set, $det,
+          $nb_det, $time, $product_st, $product_tr);
+}
+
+
+# Take a string which starts with the line " XX: `Algo Name'" and
+# contains all algorithm block. Then it prints all the information
+# wanted in its block, for the positive and negated formula.
+sub work_on_algorithm($$)
+{
+  my ($content, $formula) = @_;
+
+  my ($nb) = ($content =~ /(\d+?):[^\n]+/ms);
+  $content = $'; #'
+
+  # Get the number of state and transition of the automaton and the
+  # product and the computation time.
+  my ($states, $tr, $acc_set, $det, $nb_det, $time, $product_st, $product_tr)
+      = work_on_formula_in_algo(\$content);
+
+  print "\"$formula\",$nb,$states,$tr,$acc_set,$det,$nb_det,"
+      . "$time,$product_st,$product_tr\n" unless defined $no_positive;
+
+  # Now let's repeat with the negated formula.
+  ($states, $tr, $acc_set, $det, $nb_det, $time, $product_st, $product_tr)
+      = work_on_formula_in_algo(\$content);
+
+  print "\"! $formula\",$nb,$states,$tr,$acc_set,$det,$nb_det,"
+      . "$time,$product_st,$product_tr\n" unless defined $no_negative;
+}
+
+# Take a string which is a concatenation of the lines of a round.
+# In fact, we received from "LTL formula..." to "...Model".
+# So we have to clean a little before working.
+sub work_on_whole_round($)
+{
+  my ($round) = @_;
+
+  $round =~ /.*?\n\s+formula:\s+(.*?)\n/ms;
+  my $formula = $1;
+  $round = $'; #'
+
+  $round =~ s{\n\n(.*?)(?=\n\n)}<
+  work_on_algorithm ($1, $formula);
+  >gse;
+}
+
+while ($ARGV[0] eq '-n' or $ARGV[0] eq '-p')
+{
+  $no_negative = undef;
+  $no_positive = undef;
+  $no_negative = "true" if $ARGV[0] eq '-p';
+  $no_positive = "true" if $ARGV[0] eq '-n';
+  shift;
+}
+
+my $round_re = qr/LTL formula:.*?Model/sm;
+
+local $/ = undef;
+while (my $content = <>)
+{
+  # The content starting with "Round 1" and ending before the
+  # "Statistics after round ...".
+  $content =~ /Round/m;
+  $content = "Round" . $'; #'
+      $content =~ /Statistics after round /m;
+  $content = $`;
+
+  $content =~ s<$round_re><
+      work_on_whole_round($&);
+  >gse;
+}