bench/stutter: add a "user" benchmark

* bench/stutter/user.sh: New bench.
* bench/stutter/Makefile.am: Add it.
* bench/stutter/README: Mention it.
* bench/stutter/stutter_bench.sh: Run it.

bench/stutter/user.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+RANDLTL=../../src/bin/randltl
+LTLFILT=../../src/bin/ltlfilt
+LTLDO=../../src/bin/ltldo
+
+set -e -x
+
+(
+must_exit=false
+echo ap,algo,time,matched,exit.status
+for ap in 1 2 3 4; do
+    $RANDLTL $ap --tree-size=..30 -n -1 | $LTLFILT --ap=$ap | $LTLFILT -v --nox -n 500 > formulas
+    for algo in 1 2 3 4 5 6 7 8 0; do
+	es=0
+	SPOT_STUTTER_CHECK=$algo /usr/bin/time -o user-$ap-$algo.csv -f "$ap,$algo,%e" $LTLFILT --stutter-invariant formulas > matched-$ap-$algo.ltl || must_exit=true es=$?
+	matched=`wc -l < matched-$ap-$algo.ltl`
+	csv=`tail -n 1 user-$ap-$algo.csv`
+	echo $csv,$matched,$es
+	rm -f user-$ap-$algo.csv
+	$must_exit && exit 0
+    done
+done
+) > ltl-user-bench.csv