Term Rewriting System R:
[x]
f(f(x, a), a) -> f(f(f(a, a), f(x, a)), a)
Innermost Termination of R to be shown.
   R
     ↳Dependency Pair Analysis
R contains the following Dependency Pairs: 
F(f(x, a), a) -> F(f(f(a, a), f(x, a)), a)
F(f(x, a), a) -> F(f(a, a), f(x, a))
F(f(x, a), a) -> F(a, a)
Furthermore, R contains one SCC.
   R
     ↳DPs
       →DP Problem 1
         ↳Remaining Obligation(s)
The following remains to be proven:
Dependency Pair:
F(f(x, a), a) -> F(f(f(a, a), f(x, a)), a)
Rule:
f(f(x, a), a) -> f(f(f(a, a), f(x, a)), a)
Strategy:
innermost
Innermost Termination of R could not be shown.
Duration: 
0:00 minutes