* Step 1: Sum WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            f(x,s(y)) -> f(y,x)
            f(s(x),y) -> f(x,s(x))
        - Signature:
            {f/2} / {s/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {f} and constructors {s}
    + Applied Processor:
        Sum {left = someStrategy, right = someStrategy}
    + Details:
        ()
* Step 2: DecreasingLoops WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            f(x,s(y)) -> f(y,x)
            f(s(x),y) -> f(x,s(x))
        - Signature:
            {f/2} / {s/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {f} and constructors {s}
    + Applied Processor:
        DecreasingLoops {bound = AnyLoop, narrow = 10}
    + Details:
        The system has following decreasing Loops:
          f(x,y){x -> s(x)} =
            f(s(x),y) ->^+ f(x,s(x))
              = C[f(x,s(x)) = f(x,y){y -> s(x)}]

WORST_CASE(Omega(n^1),?)