MAYBE
Time: 0.016

Problem:
 Equations:
  
 TRS:
  le(0(),y) -> true()
  le(s(x),0()) -> false()
  le(s(x),s(y)) -> le(x,y)
  minus(0(),y) -> 0()
  minus(s(x),y) -> if_minus(le(s(x),y),s(x),y)
  if_minus(true(),s(x),y) -> 0()
  if_minus(false(),s(x),y) -> s(minus(x,y))
  gcdC(0(),y) -> y
  gcdC(s(x),0()) -> s(x)
  gcdC(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
  if_gcd(true(),s(x),s(y)) -> gcdC(minus(x,y),s(y))
  if_gcd(false(),s(x),s(y)) -> gcdC(minus(y,x),s(x))

Proof:
 Open