active
zeros
mark
cons
0
zeros
active
U11
tt
mark
tt
active
U21
tt
mark
tt
active
U31
tt
mark
tt
active
U41
tt
V2
mark
U42
isNatIList
V2
active
U42
tt
mark
tt
active
U51
tt
V2
mark
U52
isNatList
V2
active
U52
tt
mark
tt
active
U61
tt
L
N
mark
U62
isNat
N
L
active
U62
tt
L
mark
s
length
L
active
isNat
0
mark
tt
active
isNat
length
V1
mark
U11
isNatList
V1
active
isNat
s
V1
mark
U21
isNat
V1
active
isNatIList
V
mark
U31
isNatList
V
active
isNatIList
zeros
mark
tt
active
isNatIList
cons
V1
V2
mark
U41
isNat
V1
V2
active
isNatList
nil
mark
tt
active
isNatList
cons
V1
V2
mark
U51
isNat
V1
V2
active
length
nil
mark
0
active
length
cons
N
L
mark
U61
isNatList
L
L
N
active
cons
X1
X2
cons
active
X1
X2
active
U11
X
U11
active
X
active
U21
X
U21
active
X
active
U31
X
U31
active
X
active
U41
X1
X2
U41
active
X1
X2
active
U42
X
U42
active
X
active
U51
X1
X2
U51
active
X1
X2
active
U52
X
U52
active
X
active
U61
X1
X2
X3
U61
active
X1
X2
X3
active
U62
X1
X2
U62
active
X1
X2
active
s
X
s
active
X
active
length
X
length
active
X
cons
mark
X1
X2
mark
cons
X1
X2
U11
mark
X
mark
U11
X
U21
mark
X
mark
U21
X
U31
mark
X
mark
U31
X
U41
mark
X1
X2
mark
U41
X1
X2
U42
mark
X
mark
U42
X
U51
mark
X1
X2
mark
U51
X1
X2
U52
mark
X
mark
U52
X
U61
mark
X1
X2
X3
mark
U61
X1
X2
X3
U62
mark
X1
X2
mark
U62
X1
X2
s
mark
X
mark
s
X
length
mark
X
mark
length
X
proper
zeros
ok
zeros
proper
cons
X1
X2
cons
proper
X1
proper
X2
proper
0
ok
0
proper
U11
X
U11
proper
X
proper
tt
ok
tt
proper
U21
X
U21
proper
X
proper
U31
X
U31
proper
X
proper
U41
X1
X2
U41
proper
X1
proper
X2
proper
U42
X
U42
proper
X
proper
isNatIList
X
isNatIList
proper
X
proper
U51
X1
X2
U51
proper
X1
proper
X2
proper
U52
X
U52
proper
X
proper
isNatList
X
isNatList
proper
X
proper
U61
X1
X2
X3
U61
proper
X1
proper
X2
proper
X3
proper
U62
X1
X2
U62
proper
X1
proper
X2
proper
isNat
X
isNat
proper
X
proper
s
X
s
proper
X
proper
length
X
length
proper
X
proper
nil
ok
nil
cons
ok
X1
ok
X2
ok
cons
X1
X2
U11
ok
X
ok
U11
X
U21
ok
X
ok
U21
X
U31
ok
X
ok
U31
X
U41
ok
X1
ok
X2
ok
U41
X1
X2
U42
ok
X
ok
U42
X
isNatIList
ok
X
ok
isNatIList
X
U51
ok
X1
ok
X2
ok
U51
X1
X2
U52
ok
X
ok
U52
X
isNatList
ok
X
ok
isNatList
X
U61
ok
X1
ok
X2
ok
X3
ok
U61
X1
X2
X3
U62
ok
X1
ok
X2
ok
U62
X1
X2
isNat
ok
X
ok
isNat
X
s
ok
X
ok
s
X
length
ok
X
ok
length
X
top
mark
X
top
proper
X
top
ok
X
top
active
X
2.2
active
U61
X1
X2
X3
U61
active
X1
X2
X3
active
U11
X
U11
active
X
isNat
ok
X
isNat
X
proper
U62
X1
X2
proper
X2
proper
U31
X
U31
proper
X
U11
ok
X
U11
X
proper
U41
X1
X2
proper
X1
isNatIList
ok
X
isNatIList
X
proper
isNatList
X
proper
X
active
U42
X
U42
active
X
proper
isNatList
X
isNatList
proper
X
active
isNat
s
V1
U21
isNat
V1
active
cons
X1
X2
cons
active
X1
X2
U41
ok
X1
ok
X2
U41
X1
X2
proper
isNat
X
isNat
proper
X
active
U51
tt
V2
isNatList
V2
active
U21
X
U21
active
X
active
s
X
s
active
X
active
length
cons
N
L
isNatList
L
active
U21
X
active
X
active
U62
tt
L
s
length
L
active
isNatList
cons
V1
V2
isNat
V1
U51
mark
X1
X2
U51
X1
X2
proper
U52
X
proper
X
proper
length
X
length
proper
X
active
isNat
s
V1
isNat
V1
proper
cons
X1
X2
cons
proper
X1
proper
X2
active
isNatIList
V
U31
isNatList
V
proper
U21
X
proper
X
top
mark
X
top
proper
X
proper
U41
X1
X2
proper
X2
active
U61
tt
L
N
isNat
N
active
U51
X1
X2
active
X1
top
ok
X
top
active
X
active
isNat
length
V1
U11
isNatList
V1
proper
U42
X
U42
proper
X
U62
mark
X1
X2
U62
X1
X2
U41
mark
X1
X2
U41
X1
X2
U31
mark
X
U31
X
proper
U52
X
U52
proper
X
active
U62
tt
L
length
L
proper
U21
X
U21
proper
X
active
length
X
active
X
proper
s
X
s
proper
X
active
length
cons
N
L
U61
isNatList
L
L
N
proper
U61
X1
X2
X3
proper
X3
active
U41
tt
V2
isNatIList
V2
cons
mark
X1
X2
cons
X1
X2
active
U31
X
active
X
active
U42
X
active
X
active
U41
X1
X2
active
X1
active
isNatIList
cons
V1
V2
U41
isNat
V1
V2
isNatList
ok
X
isNatList
X
proper
U51
X1
X2
proper
X1
U52
ok
X
U52
X
top
mark
X
proper
X
active
U51
X1
X2
U51
active
X1
X2
length
mark
X
length
X
active
isNatList
cons
V1
V2
U51
isNat
V1
V2
proper
U42
X
proper
X
proper
isNatIList
X
proper
X
proper
length
X
proper
X
proper
U51
X1
X2
U51
proper
X1
proper
X2
active
isNat
length
V1
isNatList
V1
length
ok
X
length
X
proper
s
X
proper
X
top
ok
X
active
X
proper
U61
X1
X2
X3
U61
proper
X1
proper
X2
proper
X3
U11
mark
X
U11
X
proper
cons
X1
X2
proper
X1
active
U61
tt
L
N
U62
isNat
N
L
U61
mark
X1
X2
X3
U61
X1
X2
X3
proper
isNat
X
proper
X
active
length
X
length
active
X
active
U62
X1
X2
active
X1
U31
ok
X
U31
X
active
U51
tt
V2
U52
isNatList
V2
U21
ok
X
U21
X
active
U31
X
U31
active
X
proper
U41
X1
X2
U41
proper
X1
proper
X2
proper
U62
X1
X2
proper
X1
proper
U61
X1
X2
X3
proper
X2
U52
mark
X
U52
X
active
U52
X
U52
active
X
active
U11
X
active
X
proper
U62
X1
X2
U62
proper
X1
proper
X2
active
isNatIList
V
isNatList
V
proper
U11
X
proper
X
proper
U51
X1
X2
proper
X2
U61
ok
X1
ok
X2
ok
X3
U61
X1
X2
X3
active
U62
X1
X2
U62
active
X1
X2
proper
isNatIList
X
isNatIList
proper
X
U42
mark
X
U42
X
active
cons
X1
X2
active
X1
active
U52
X
active
X
active
U41
X1
X2
U41
active
X1
X2
proper
U31
X
proper
X
proper
U61
X1
X2
X3
proper
X1
proper
U11
X
U11
proper
X
active
U61
X1
X2
X3
active
X1
cons
ok
X1
ok
X2
cons
X1
X2
s
mark
X
s
X
active
s
X
active
X
proper
cons
X1
X2
proper
X2
U51
ok
X1
ok
X2
U51
X1
X2
active
isNatIList
cons
V1
V2
isNat
V1
s
ok
X
s
X
U21
mark
X
U21
X
active
zeros
cons
0
zeros
active
U41
tt
V2
U42
isNatIList
V2
U42
ok
X
U42
X
U62
ok
X1
ok
X2
U62
X1
X2
true
top
ok
X
top
active
X
top
mark
X
top
proper
X
true
Failed!
NaTT
certifiable-1.6