MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          if(false(),x,y,z,u) -> if2(le(y,s(u)),x,y,s(z),s(u))
          if(true(),x,y,z,u) -> u
          if2(false(),x,y,z,u) -> modIter(x,y,z,u)
          if2(true(),x,y,z,u) -> modIter(x,y,z,0())
          le(0(),y) -> true()
          le(s(x),0()) -> false()
          le(s(x),s(y)) -> le(x,y)
          mod(x,0()) -> modZeroErro()
          mod(x,s(y)) -> modIter(x,s(y),0(),0())
          modIter(x,s(y),z,u) -> if(le(x,z),x,s(y),z,u)
      - Signature:
          {if/5,if2/5,le/2,mod/2,modIter/4} / {0/0,false/0,modZeroErro/0,s/1,true/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {if,if2,le,mod,modIter} and constructors {0,false
          ,modZeroErro,s,true}
  + Applied Processor:
      NaturalPI {shape = Mixed 3, restrict = NoRestrict, uargs = UArgs, urules = URules, selector = Nothing}
  + Details:
      Incompatible
MAYBE