Termination w.r.t. Q proof of TRS/TRCSREx2_Luc03b

Termination w.r.t. Q of the following Term Rewriting System could be proven:

Q restricted rewrite system:
The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.

↳ QTRS

  ↳ DependencyPairsProof

Q restricted rewrite system:
The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.

Using Dependency Pairs [1,13] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__s₁(X)) -> S₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))
LEN₁(cons₂(X, Z)) -> S₁(n__len₁(activate₁(Z)))
ACTIVATE₁(n__from₁(X)) -> FROM₁(activate₁(X))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
ACTIVATE₁(n__from₁(X)) -> ACTIVATE₁(X)
ADD₂(s₁(X), Y) -> S₁(n__add₂(activate₁(X), Y))
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__s₁(X)) -> S₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))
LEN₁(cons₂(X, Z)) -> S₁(n__len₁(activate₁(Z)))
ACTIVATE₁(n__from₁(X)) -> FROM₁(activate₁(X))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
ACTIVATE₁(n__from₁(X)) -> ACTIVATE₁(X)
ADD₂(s₁(X), Y) -> S₁(n__add₂(activate₁(X), Y))
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 1 SCC with 4 less nodes.

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ QDP

          ↳ QDPOrderProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
ACTIVATE₁(n__from₁(X)) -> ACTIVATE₁(X)
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].

The following pairs can be oriented strictly and are deleted.

ACTIVATE₁(n__from₁(X)) -> ACTIVATE₁(X)

The remaining pairs can at least be oriented weakly.

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)

Used ordering: Polynomial Order [17,21] with Interpretation:

POL( from₁(x₁) ) = x₁ + 1

POL( fst₂(x₁, x₂) ) = x₁ + x₂

POL( n__from₁(x₁) ) = x₁ + 1

POL( n__s₁(x₁) ) = x₁

POL( 0 ) = max{0, -2}

POL( ADD₂(x₁, x₂) ) = x₁

POL( LEN₁(x₁) ) = x₁

POL( nil ) = 0

POL( cons₂(x₁, x₂) ) = x₂

POL( activate₁(x₁) ) = x₁

POL( n__add₂(x₁, x₂) ) = x₁ + x₂

POL( len₁(x₁) ) = x₁

POL( ACTIVATE₁(x₁) ) = x₁

POL( add₂(x₁, x₂) ) = x₁ + x₂

POL( n__fst₂(x₁, x₂) ) = x₁ + x₂

POL( FST₂(x₁, x₂) ) = x₁ + x₂

POL( s₁(x₁) ) = x₁

POL( n__len₁(x₁) ) = x₁

The following usable rules [14] were oriented:

fst₂(X1, X2) -> n__fst₂(X1, X2)
add₂(0, X) -> X
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
from₁(X) -> n__from₁(X)
fst₂(0, Z) -> nil
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
len₁(X) -> n__len₁(X)
activate₁(n__s₁(X)) -> s₁(X)
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
len₁(nil) -> 0
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
add₂(X1, X2) -> n__add₂(X1, X2)
activate₁(n__from₁(X)) -> from₁(activate₁(X))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
activate₁(X) -> X
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
s₁(X) -> n__s₁(X)

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ QDP

          ↳ QDPOrderProof

            ↳ QDP

              ↳ QDPOrderProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].

The following pairs can be oriented strictly and are deleted.

ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X2)
ADD₂(s₁(X), Y) -> ACTIVATE₁(X)
ACTIVATE₁(n__len₁(X)) -> ACTIVATE₁(X)
ACTIVATE₁(n__add₂(X1, X2)) -> ACTIVATE₁(X1)
ACTIVATE₁(n__len₁(X)) -> LEN₁(activate₁(X))
ACTIVATE₁(n__add₂(X1, X2)) -> ADD₂(activate₁(X1), activate₁(X2))

The remaining pairs can at least be oriented weakly.

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)

Used ordering: Polynomial Order [17,21] with Interpretation:

POL( from₁(x₁) ) = max{0, -3}

POL( fst₂(x₁, x₂) ) = 2x₁ + x₂

POL( n__from₁(x₁) ) = max{0, -3}

POL( n__s₁(x₁) ) = x₁

POL( 0 ) = 1

POL( ADD₂(x₁, x₂) ) = 2x₁ + 2x₂ + 1

POL( LEN₁(x₁) ) = 2x₁

POL( nil ) = 2

POL( cons₂(x₁, x₂) ) = x₂

POL( activate₁(x₁) ) = x₁

POL( n__add₂(x₁, x₂) ) = x₁ + x₂ + 2

POL( len₁(x₁) ) = 2x₁ + 1

POL( ACTIVATE₁(x₁) ) = 2x₁

POL( add₂(x₁, x₂) ) = x₁ + x₂ + 2

POL( n__fst₂(x₁, x₂) ) = 2x₁ + x₂

POL( FST₂(x₁, x₂) ) = 2x₁ + 2x₂

POL( s₁(x₁) ) = x₁

POL( n__len₁(x₁) ) = 2x₁ + 1

The following usable rules [14] were oriented:

fst₂(X1, X2) -> n__fst₂(X1, X2)
add₂(0, X) -> X
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
from₁(X) -> n__from₁(X)
fst₂(0, Z) -> nil
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
len₁(X) -> n__len₁(X)
activate₁(n__s₁(X)) -> s₁(X)
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
len₁(nil) -> 0
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
add₂(X1, X2) -> n__add₂(X1, X2)
activate₁(n__from₁(X)) -> from₁(activate₁(X))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
activate₁(X) -> X
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
s₁(X) -> n__s₁(X)

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ QDP

          ↳ QDPOrderProof

            ↳ QDP

              ↳ QDPOrderProof

                ↳ QDP

                  ↳ DependencyGraphProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)
LEN₁(cons₂(X, Z)) -> ACTIVATE₁(Z)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 1 SCC with 1 less node.

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ QDP

          ↳ QDPOrderProof

            ↳ QDP

              ↳ QDPOrderProof

                ↳ QDP

                  ↳ DependencyGraphProof

                    ↳ QDP

                      ↳ QDPOrderProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].

The following pairs can be oriented strictly and are deleted.

ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X2)
ACTIVATE₁(n__fst₂(X1, X2)) -> FST₂(activate₁(X1), activate₁(X2))
ACTIVATE₁(n__fst₂(X1, X2)) -> ACTIVATE₁(X1)

The remaining pairs can at least be oriented weakly.

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)

Used ordering: Polynomial Order [17,21] with Interpretation:

POL( from₁(x₁) ) = 1

POL( fst₂(x₁, x₂) ) = x₁ + x₂ + 3

POL( n__from₁(x₁) ) = 1

POL( n__s₁(x₁) ) = x₁

POL( 0 ) = 0

POL( nil ) = max{0, -2}

POL( cons₂(x₁, x₂) ) = x₂

POL( activate₁(x₁) ) = x₁

POL( n__add₂(x₁, x₂) ) = 2x₂ + 1

POL( len₁(x₁) ) = 0

POL( ACTIVATE₁(x₁) ) = max{0, 2x₁ - 3}

POL( add₂(x₁, x₂) ) = 2x₂ + 1

POL( FST₂(x₁, x₂) ) = 2x₁ + 2x₂

POL( n__fst₂(x₁, x₂) ) = x₁ + x₂ + 3

POL( s₁(x₁) ) = x₁

POL( n__len₁(x₁) ) = max{0, -3}

The following usable rules [14] were oriented:

fst₂(X1, X2) -> n__fst₂(X1, X2)
add₂(0, X) -> X
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
from₁(X) -> n__from₁(X)
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
fst₂(0, Z) -> nil
activate₁(n__len₁(X)) -> len₁(activate₁(X))
len₁(X) -> n__len₁(X)
activate₁(n__s₁(X)) -> s₁(X)
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
len₁(nil) -> 0
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
add₂(X1, X2) -> n__add₂(X1, X2)
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(X) -> X
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
s₁(X) -> n__s₁(X)

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ QDP

          ↳ QDPOrderProof

            ↳ QDP

              ↳ QDPOrderProof

                ↳ QDP

                  ↳ DependencyGraphProof

                    ↳ QDP

                      ↳ QDPOrderProof

                        ↳ QDP

                          ↳ DependencyGraphProof

Q DP problem:
The TRS P consists of the following rules:

FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(X)
FST₂(s₁(X), cons₂(Y, Z)) -> ACTIVATE₁(Z)

The TRS R consists of the following rules:

fst₂(0, Z) -> nil
fst₂(s₁(X), cons₂(Y, Z)) -> cons₂(Y, n__fst₂(activate₁(X), activate₁(Z)))
from₁(X) -> cons₂(X, n__from₁(n__s₁(X)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(n__add₂(activate₁(X), Y))
len₁(nil) -> 0
len₁(cons₂(X, Z)) -> s₁(n__len₁(activate₁(Z)))
fst₂(X1, X2) -> n__fst₂(X1, X2)
from₁(X) -> n__from₁(X)
s₁(X) -> n__s₁(X)
add₂(X1, X2) -> n__add₂(X1, X2)
len₁(X) -> n__len₁(X)
activate₁(n__fst₂(X1, X2)) -> fst₂(activate₁(X1), activate₁(X2))
activate₁(n__from₁(X)) -> from₁(activate₁(X))
activate₁(n__s₁(X)) -> s₁(X)
activate₁(n__add₂(X1, X2)) -> add₂(activate₁(X1), activate₁(X2))
activate₁(n__len₁(X)) -> len₁(activate₁(X))
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 0 SCCs with 2 less nodes.