MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          eq(0(),0()) -> true()
          eq(0(),s(x)) -> false()
          eq(s(x),0()) -> false()
          eq(s(x),s(y)) -> eq(x,y)
          from(edge(x,y,i)) -> x
          if1(false(),b1,b2,b3,x,y,i,h) -> if2(b1,b2,b3,x,y,i,h)
          if1(true(),b1,b2,b3,x,y,i,h) -> true()
          if2(false(),b2,b3,x,y,i,h) -> if3(b2,b3,x,y,i,h)
          if2(true(),b2,b3,x,y,i,h) -> false()
          if3(false(),b3,x,y,i,h) -> reach(x,y,rest(i),edge(from(i),to(i),h))
          if3(true(),b3,x,y,i,h) -> if4(b3,x,y,i,h)
          if4(false(),x,y,i,h) -> or(reach(x,y,rest(i),h),reach(to(i),y,union(rest(i),h),empty()))
          if4(true(),x,y,i,h) -> true()
          isEmpty(edge(x,y,i)) -> false()
          isEmpty(empty()) -> true()
          or(false(),y) -> y
          or(true(),y) -> true()
          reach(x,y,i,h) -> if1(eq(x,y),isEmpty(i),eq(x,from(i)),eq(y,to(i)),x,y,i,h)
          rest(edge(x,y,i)) -> i
          rest(empty()) -> empty()
          to(edge(x,y,i)) -> y
          union(edge(x,y,i),h) -> edge(x,y,union(i,h))
          union(empty(),h) -> h
      - Signature:
          {eq/2,from/1,if1/8,if2/7,if3/6,if4/5,isEmpty/1,or/2,reach/4,rest/1,to/1,union/2} / {0/0,edge/3,empty/0
          ,false/0,s/1,true/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {eq,from,if1,if2,if3,if4,isEmpty,or,reach,rest,to
          ,union} and constructors {0,edge,empty,false,s,true}
  + Applied Processor:
      MI {miKind = Automaton Nothing, miDimension = 3, miUArgs = NoUArgs, miURules = NoURules, miSelector = Nothing}
  + Details:
      Incompatible
MAYBE