Termination Proof Script

Consider the TRS R consisting of the rewrite rule
1:    f(f(x,a),y)  → f(y,f(x,y))
There are 2 dependency pairs:
2:    F(f(x,a),y)  → F(y,f(x,y))
3:    F(f(x,a),y)  → F(x,y)
Consider the SCC {2,3}. The constraints could not be solved.
Tyrolean Termination Tool  (0.00 seconds)   ---  May 3, 2006