p
0
0
p
s
X
X
leq
0
Y
true
leq
s
X
0
false
leq
s
X
s
Y
leq
X
Y
if
true
X
Y
X
if
false
X
Y
Y
diff
X
Y
if
leq
X
Y
0
s
diff
p
X
Y
2.2
diff
X
Y
if
leq
X
Y
0
s
diff
p
X
Y
diff
X
Y
p
X
diff
X
Y
leq
X
Y
leq
s
X
s
Y
leq
X
Y
diff
X
Y
diff
p
X
Y
true
diff
X
Y
diff
p
X
Y
true
Failed!
NaTT
certifiable-1.6