Term Rewriting System R:
[Z, Y, X]
fst(0, Z) -> nil
fst(s, cons(Y)) -> cons(Y)
from(X) -> cons(X)
add(0, X) -> X
add(s, Y) -> s
len(nil) -> 0
len(cons(X)) -> s

Termination of R to be shown.

Dependency Pair Analysis

R contains no Dependency Pairs and therefore no SCCs.

Termination of R successfully shown.
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