MAYBE

'epo* (timeout of 60.0 seconds)'
--------------------------------
Answer:           MAYBE
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  eq(0(), 0()) -> true()
     , eq(0(), s(X)) -> false()
     , eq(s(X), 0()) -> false()
     , eq(s(X), s(Y)) -> eq(X, Y)
     , rm(N, nil()) -> nil()
     , rm(N, add(M, X)) -> ifrm(eq(N, M), N, add(M, X))
     , ifrm(true(), N, add(M, X)) -> rm(N, X)
     , ifrm(false(), N, add(M, X)) -> add(M, rm(N, X))
     , purge(nil()) -> nil()
     , purge(add(N, X)) -> add(N, purge(rm(N, X)))}

Proof Output:    
  The input cannot be shown compatible