* Step 1: Sum WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            -(x,0()) -> x
            -(s(x),s(y)) -> -(x,y)
            f(s(x),s(y)) -> f(-(x,min(x,y)),s(twice(min(x,y))))
            f(s(x),s(y)) -> f(-(y,min(x,y)),s(twice(min(x,y))))
            min(x,0()) -> 0()
            min(0(),y) -> 0()
            min(s(x),s(y)) -> s(min(x,y))
            twice(0()) -> 0()
            twice(s(x)) -> s(s(twice(x)))
        - Signature:
            {-/2,f/2,min/2,twice/1} / {0/0,s/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {-,f,min,twice} and constructors {0,s}
    + Applied Processor:
        Sum {left = someStrategy, right = someStrategy}
    + Details:
        ()
* Step 2: DecreasingLoops WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            -(x,0()) -> x
            -(s(x),s(y)) -> -(x,y)
            f(s(x),s(y)) -> f(-(x,min(x,y)),s(twice(min(x,y))))
            f(s(x),s(y)) -> f(-(y,min(x,y)),s(twice(min(x,y))))
            min(x,0()) -> 0()
            min(0(),y) -> 0()
            min(s(x),s(y)) -> s(min(x,y))
            twice(0()) -> 0()
            twice(s(x)) -> s(s(twice(x)))
        - Signature:
            {-/2,f/2,min/2,twice/1} / {0/0,s/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {-,f,min,twice} and constructors {0,s}
    + Applied Processor:
        DecreasingLoops {bound = AnyLoop, narrow = 10}
    + Details:
        The system has following decreasing Loops:
          -(x,y){x -> s(x),y -> s(y)} =
            -(s(x),s(y)) ->^+ -(x,y)
              = C[-(x,y) = -(x,y){}]

WORST_CASE(Omega(n^1),?)