Termination Proof Script

Consider the TRS R consisting of the rewrite rules
1:    (x + y) + z  → x + (y + z)
2:    f(x) + f(y)  → f(x + y)
3:    f(x) + (f(y) + z)  → f(x + y) + z
There are 5 dependency pairs:
4:    (x + y) +# z  → x +# (y + z)
5:    (x + y) +# z  → y +# z
6:    f(x) +# f(y)  → x +# y
7:    f(x) +# (f(y) + z)  → f(x + y) +# z
8:    f(x) +# (f(y) + z)  → x +# y
Consider the SCC {4-8}. The constraints could not be solved.
Tyrolean Termination Tool  (0.02 seconds)   ---  May 3, 2006