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Fix random_graph() not to generate dead states.

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This is actually the third time I fix random_graph().  On
2007-02-06 I changed the function not to generated dead states,
but in a way that made it non-deterministic.  On 2010-01-20 I made
the function deterministic again, but it started to generate dead
states as a side effect.  This time, I'm making sure that dead
states won't come again with a test-case that we should have had
from the beginning.

* src/tgbaalgos/randomgraph.cc (random_graph): Add an extra
indirection array, state_randomizer[], so that we can reorder
states indices after a random selection without actually changing
the value of the indices used by unreachable_states and
nodes_to_process.
* src/tgbatest/randtgba.test: New file.
* src/tgbatest/Makefile.am: Add randtgba.test.
This commit is contained in:
Alexandre Duret-Lutz 2010-02-23 17:20:59 +01:00
parent 72b7deec12
commit 2183276008
4 changed files with 72 additions and 9 deletions
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3
src/tgbatest/Makefile.am
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@ -1,4 +1,4 @@
## Copyright (C) 2009 Laboratoire de Recherche et Développement
## Copyright (C) 2009, 2010 Laboratoire de Recherche et Développement
## de l'Epita (LRDE).
## Copyright (C) 2003, 2004, 2005, 2006 Laboratoire d'Informatique de
## Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
@ -91,6 +91,7 @@ TESTS = \
reduccmp.test \
reductgba.test \
scc.test \
randtgba.test \
emptchk.test \
emptchke.test \
dfs.test \

34
src/tgbatest/randtgba.test Executable file
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@ -0,0 +1,34 @@
#!/bin/sh
# Copyright (C) 2010 Laboratoire de Recherche et Development 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.
. ./defs
set -e
for n in 10 20 30 40 50 60 70 80 90 100 200 500 1000; do
# Make sure graph generated by randtgba have successors for each
# of their $n nodes.
r=`../randtgba -n $n a b c | sed -n 's/^"S\([0-9]*\)".*/\1/p' |
sort -u | wc -l`
if test "$r" -eq "$n"; then :; else
echo "test failed for n=$n"
exit 1
fi
done