MAYBE
The TRS could not be proven terminating. The proof attempt took 3174 ms.
Problem 1 remains open; application of the following processors failed [DependencyGraph (12ms), SubtermCriterion (5ms), DependencyGraph (6ms), PolynomialLinearRange4iUR (287ms), DependencyGraph (3ms), PolynomialLinearRange8NegiUR (1416ms), DependencyGraph (5ms), ReductionPairSAT (1305ms), DependencyGraph (2ms), SizeChangePrinciple (12ms)].
f#(f(a, x), y) | → | f#(f(x, f(a, y)), a) | f#(f(a, x), y) | → | f#(a, y) | |
f#(f(a, x), y) | → | f#(x, f(a, y)) |
f(f(a, x), y) | → | f(f(x, f(a, y)), a) |
Termination of terms over the following signature is verified: f, a