Term Rewriting System R:
[x, y, z]
f(s(a), s(b), x) -> f(x, x, x)
g(f(s(x), s(y), z)) -> g(f(x, y, z))
cons(x, y) -> x
cons(x, y) -> y

Innermost Termination of R to be shown.



   R
Dependency Pair Analysis



R contains the following Dependency Pairs:

F(s(a), s(b), x) -> F(x, x, x)
G(f(s(x), s(y), z)) -> G(f(x, y, z))
G(f(s(x), s(y), z)) -> F(x, y, z)

Furthermore, R contains one SCC.


   R
DPs
       →DP Problem 1
Usable Rules (Innermost)


Dependency Pair:

G(f(s(x), s(y), z)) -> G(f(x, y, z))


Rules:


f(s(a), s(b), x) -> f(x, x, x)
g(f(s(x), s(y), z)) -> g(f(x, y, z))
cons(x, y) -> x
cons(x, y) -> y


Strategy:

innermost




As we are in the innermost case, we can delete all 3 non-usable-rules.


   R
DPs
       →DP Problem 1
UsableRules
           →DP Problem 2
Remaining Obligation(s)




The following remains to be proven:
Dependency Pair:

G(f(s(x), s(y), z)) -> G(f(x, y, z))


Rule:


f(s(a), s(b), x) -> f(x, x, x)


Strategy:

innermost



Innermost Termination of R could not be shown.
Duration:
0:16 minutes