(0) Obligation:
Q restricted rewrite system:
The TRS R consists of the following rules:
dfib(s(s(x)), y) → dfib(s(x), dfib(x, y))
Q is empty.
(1) DependencyPairsProof (EQUIVALENT transformation)
Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem.
(2) Obligation:
Q DP problem:
The TRS P consists of the following rules:
DFIB(s(s(x)), y) → DFIB(s(x), dfib(x, y))
DFIB(s(s(x)), y) → DFIB(x, y)
The TRS R consists of the following rules:
dfib(s(s(x)), y) → dfib(s(x), dfib(x, y))
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
(3) QDPSizeChangeProof (EQUIVALENT transformation)
We used the following order and afs together with the size-change analysis [AAECC05] to show that there are no infinite chains for this DP problem.
Order:Homeomorphic Embedding Order
AFS:
s(x1) = s(x1)
From the DPs we obtained the following set of size-change graphs:
- DFIB(s(s(x)), y) → DFIB(s(x), dfib(x, y)) (allowed arguments on rhs = {1})
The graph contains the following edges 1 > 1
- DFIB(s(s(x)), y) → DFIB(x, y) (allowed arguments on rhs = {1, 2})
The graph contains the following edges 1 > 1, 2 >= 2
We oriented the following set of usable rules [AAECC05,FROCOS05].
none
(4) TRUE