Term Rewriting System R:
[x]
f(a, f(a, x)) -> f(a, f(f(a, a), f(a, x)))

Innermost Termination of R to be shown.

`   R`
`     ↳Dependency Pair Analysis`

R contains the following Dependency Pairs:

F(a, f(a, x)) -> F(a, f(f(a, a), f(a, x)))
F(a, f(a, x)) -> F(f(a, a), f(a, x))
F(a, f(a, x)) -> F(a, a)

Furthermore, R contains one SCC.

`   R`
`     ↳DPs`
`       →DP Problem 1`
`         ↳Polynomial Ordering`

Dependency Pairs:

F(a, f(a, x)) -> F(f(a, a), f(a, x))
F(a, f(a, x)) -> F(a, f(f(a, a), f(a, x)))

Rule:

f(a, f(a, x)) -> f(a, f(f(a, a), f(a, x)))

Strategy:

innermost

The following dependency pair can be strictly oriented:

F(a, f(a, x)) -> F(f(a, a), f(a, x))

Additionally, the following usable rule for innermost w.r.t. to the implicit AFS can be oriented:

f(a, f(a, x)) -> f(a, f(f(a, a), f(a, x)))

Used ordering: Polynomial ordering with Polynomial interpretation:
 POL(a) =  1 POL(f(x1, x2)) =  0 POL(F(x1, x2)) =  x1

resulting in one new DP problem.

`   R`
`     ↳DPs`
`       →DP Problem 1`
`         ↳Polo`
`           →DP Problem 2`
`             ↳Narrowing Transformation`

Dependency Pair:

F(a, f(a, x)) -> F(a, f(f(a, a), f(a, x)))

Rule:

f(a, f(a, x)) -> f(a, f(f(a, a), f(a, x)))

Strategy:

innermost

On this DP problem, a Narrowing SCC transformation can be performed.
As a result of transforming the rule

F(a, f(a, x)) -> F(a, f(f(a, a), f(a, x)))
one new Dependency Pair is created:

F(a, f(a, f(a, x''))) -> F(a, f(f(a, a), f(a, f(f(a, a), f(a, x'')))))

The transformation is resulting in no new DP problems.

Innermost Termination of R successfully shown.
Duration:
0:00 minutes