MAYBE
The TRS could not be proven terminating. The proof attempt took 2146 ms.
Problem 1 remains open; application of the following processors failed [DependencyGraph (12ms), SubtermCriterion (6ms), DependencyGraph (4ms), PolynomialLinearRange4iUR (302ms), DependencyGraph (3ms), PolynomialLinearRange8NegiUR (1069ms), DependencyGraph (5ms), ReductionPairSAT (620ms), DependencyGraph (2ms), SizeChangePrinciple (11ms)].
f#(x, f(y, x)) | → | f#(x, x) | f#(x, f(y, x)) | → | f#(f(x, x), f(a, y)) | |
f#(x, f(y, x)) | → | f#(a, y) |
f(x, f(y, x)) | → | f(f(x, x), f(a, y)) |
Termination of terms over the following signature is verified: f, a