YES(?,ELEMENTARY)

'epo* (timeout of 60.0 seconds)'
--------------------------------
Answer:           YES(?,ELEMENTARY)
Input Problem:    innermost runtime-complexity with respect to
  Rules: {*(x, +(y, z)) -> +(*(x, y), *(x, z))}

Proof Output:    
  Strict Rules in Predicative Notation:
   {*(+(; y, z); x) -> +(; *(y; x), *(z; x))}
  Safe Mapping:
   safe(*) = {1}, safe(+) = {1, 2}
  Argument Permutation:
   mu(*) = [2, 1]
  Precedence:
   * ~ *