YES(?,POLY)

'Pop* with parameter subtitution (timeout of 60.0 seconds)'
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Answer:           YES(?,POLY)
Input Problem:    innermost runtime-complexity with respect to
  Rules:
    {  from(X) -> cons(X, n__from(s(X)))
     , sel(0(), cons(X, Y)) -> X
     , sel(s(X), cons(Y, Z)) -> sel(X, activate(Z))
     , from(X) -> n__from(X)
     , activate(n__from(X)) -> from(X)
     , activate(X) -> X}

Proof Output:    
  The input was oriented with the instance of POP* as induced by the precedence
  
   sel > from, sel > activate, activate > from
  
  and safe mapping
  
   safe(from) = {1}, safe(cons) = {1, 2}, safe(n__from) = {1},
   safe(s) = {1}, safe(sel) = {2}, safe(0) = {},
   safe(activate) = {1} .
  
  For your convenience, here is the input in predicative notation:
  
   Rules:
    {  from(; X) -> cons(; X, n__from(; s(; X)))
     , sel(0(); cons(; X, Y)) -> X
     , sel(s(; X); cons(; Y, Z)) -> sel(X; activate(; Z))
     , from(; X) -> n__from(; X)
     , activate(; n__from(; X)) -> from(; X)
     , activate(; X) -> X}