MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          add(0(),X) -> X
          add(s(X),Y) -> s(add(X,Y))
          and(false(),Y) -> false()
          and(true(),X) -> X
          first(0(),X) -> nil()
          first(s(X),cons(Y,Z)) -> cons(Y,first(X,Z))
          from(X) -> cons(X,from(s(X)))
          if(false(),X,Y) -> Y
          if(true(),X,Y) -> X
      - Signature:
          {add/2,and/2,first/2,from/1,if/3} / {0/0,cons/2,false/0,nil/0,s/1,true/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {add,and,first,from,if} and constructors {0,cons,false,nil
          ,s,true}
  + Applied Processor:
      EmptyProcessor
  + Details:
      The problem is still open.
MAYBE