#!/bin/sh
# -*- coding: utf-8 -*-
# Copyright (C) 2011, 2013, 2014, 2015, 2017 Laboratoire de Recherche
# et Développement de l'Epita (LRDE).
#
# 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/>.

. ./defs

set -e

# Make sure degeneralization is idempotent

for f in 'FGa|GFb' 'GFa & GFb & GFc' 'GF(a->FGb)&GF(c->FGd)'; do
  for opt in -DS -DT; do
    ../ikwiad $opt -H "$f" > autX.spot
    ../ikwiad -XH -kt autX.spot > base.size
    cat base.size
    for x in X XX XXX; do
      ../ikwiad -XH $opt -H aut$x.spot > autX$x.spot
      ../ikwiad -XH -kt autX$x.spot > new.size
      cat new.size
      cmp base.size new.size
    done
  done
done


# This is another 6-state degeneralized automaton that
# we used the "redegeneralize" to a 8-state BA...
cat > bug <<EOF
HOA: v1
States: 6
Start: 0
AP: 2 "a" "b"
acc-name: Buchi
Acceptance: 1 Inf(0)
properties: trans-labels explicit-labels state-acc complete deterministic
--BODY--
State: 0 {0}
[!0 | !1] 1
[0&1] 2
State: 1 {0}
[!0&1] 1
[!0&!1] 3
[0] 4
State: 2
[0&!1] 0
[!0&!1] 1
[0&1] 2
[!0&1] 5
State: 3
[0&1] 0
[!0&1] 1
[!0&!1] 3
[0&!1] 4
State: 4
[1] 0
[0&!1] 2
[!0&!1] 5
State: 5
[!1] 0
[!0&1] 3
[0&1] 4
--END--
EOF

run 0 ../ikwiad -ks -XH -DS bug > out
grep 'states: 6' out


# This 8-state degeneralized automaton used
# to be "degeneralized" to a 9-state BA...
cat > bug2 <<EOF
HOA: v1
States: 8
Start: 0
AP: 2 "a" "b"
acc-name: Buchi
Acceptance: 1 Inf(0)
properties: trans-labels explicit-labels state-acc complete deterministic
--BODY--
State: 0
[t] 1
State: 1 {0}
[t] 2
State: 2
[0&!1] 2
[0&1] 3
[!0&!1] 4
[!0&1] 5
State: 3 {0}
[0] 2
[!0] 4
State: 4
[0&!1] 2
[0&1] 3
[!0&1] 5
[!0&!1] 6
State: 5 {0}
[0&!1] 2
[0&1] 3
[!0&1] 5
[!0&!1] 6
State: 6
[0&!1] 2
[0&1] 3
[!0&!1] 6
[!0&1] 7
State: 7
[0] 3
[!0] 7
--END--
EOF

run 0 ../ikwiad -ks -XH -DS bug2 >out
grep 'states: 8' out


# This automaton should have a 3-state BA, but it's really
# easy to obtain a 4-state BA when tweaking the degeneralization
# to ignore arc entering an SCC.
test 3 = "`ltl2tgba -B 'G(a|G(b|Fc))' --stats=%s`"


# This 7-state DRA (built with
#   ltlfilt -f 'F(a & GFb) | (Fc & Fa & F(c & GF!b))' -l  |
#   ltl2dstar --ltl2nba=spin:ltl2tgba@-sD - -
# should be converted in into a 5-state DBA.
cat >in.dra <<EOF
DRA v2 explicit
Comment: "Union{Safra[NBA=3],Safra[NBA=5]}"
States: 7
Acceptance-Pairs: 2
Start: 5
AP: 3 "a" "b" "c"
---
State: 0
Acc-Sig: +0 +1
1
1
2
2
1
1
2
2
State: 1
Acc-Sig: +1
1
1
2
2
1
1
2
2
State: 2
Acc-Sig: +0
1
1
2
2
1
1
2
2
State: 3
Acc-Sig: +0
6
6
3
3
1
1
0
0
State: 4
Acc-Sig:
4
0
4
0
4
0
4
0
State: 5
Acc-Sig:
5
3
5
3
4
0
4
0
State: 6
Acc-Sig:
6
6
3
3
1
1
0
0
EOF

run 0 dstar2tgba in.dra -BD --stats=%s > out.stat
test 5 = "`cat out.stat`"

# Only one state should be accepting.  In spot 1.2.x an initial state
# in a trivial SCC was marked as accepting: this is superfluous.
ltl2tgba -BH 'a & GFb & GFc' > out
cat out
cat >expected<<EOF
HOA: v1
name: "a & G(Fb & Fc)"
States: 4
Start: 0
AP: 3 "a" "b" "c"
acc-name: Buchi
Acceptance: 1 Inf(0)
properties: trans-labels explicit-labels state-acc deterministic
properties: stutter-invariant
--BODY--
State: 0
[0] 1
State: 1 {0}
[1&2] 1
[!2] 2
[!1&2] 3
State: 2
[1&2] 1
[!2] 2
[!1&2] 3
State: 3
[1] 1
[!1] 3
--END--
EOF
diff out expected