#! /bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) by the Spot authors, see the AUTHORS file for details.
#
# 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/>.


# Check for the unabbreviate_logic visitor

. ./defs || exit 1

set -e

# Removing W,M in this formula caused a segfault at some point.
run 0 ltlfilt --remove-wm <<EOF | uniq >out
(!((G(p0)) U ((F(p0)) M ((F(X(p1))) & ((p2) W (G(p2))))))) M (F(p0))
F(Fp0 & !(Gp0 U ((FXp1 & G(p2 | Gp2)) U (Fp0 & FXp1 & G(p2 | Gp2)))))
EOF

# The first formula will be simplified to the second, so after uniq
# the output should have one line.
test `wc -l <out` = 1

f='(Fp0 U(Fp0&!(Gp0 U((FXp1 &(Gp2 R(p2|Gp2))) U(Fp0&FXp1&(Gp2 R(p2|Gp2)))))))'
test `ltlfilt -c --equivalent-to="$f" out` = 1


# From issue #362.
simon='!p0 W (p0 W (!p0 W (p0 W G!p0)))'
ltlfilt --unabbrev=WRMF -f "$simon" -f 'FGFa' -f 'a M Fb' -f 'a R Gb' >out
cat out
cat >expected <<EOF
G(!p0 | G(p0 | G(!p0 | G(p0 | G!p0))))
G(1 U a)
1 U (a & (1 U b))
Gb
EOF
diff out expected


for i in 'GFa' 'a R b' 'a W b' 'a M b' "$simon"; do
    for fg in '' F G GF; do
	for rwm in '' R W M RW RM WM RWM; do
	    ltlfilt -f "$i" --unabbrev=$fg$rwm --equivalent-to "$i" >out
	    test -n "$rwm" && grep "[$rwm]" out && exit 1
	done
    done
done

true