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:
    {  rev(xs) -> revtl(xs, nil())
     , revtl(nil(), ys) -> ys
     , revtl(cons(x, xs), ys) -> revtl(xs, cons(x, ys))}

Proof Output:    
  The input was oriented with the instance of POP* as induced by the precedence
  
   rev > revtl
  
  and safe mapping
  
   safe(rev) = {}, safe(revtl) = {2}, safe(nil) = {},
   safe(cons) = {1, 2} .
  
  For your convenience, here is the input in predicative notation:
  
   Rules:
    {  rev(xs;) -> revtl(xs; nil())
     , revtl(nil(); ys) -> ys
     , revtl(cons(; x, xs); ys) -> revtl(xs; cons(; x, ys))}