523.48/155.54	NO
523.66/155.54	
523.66/155.54	Problem:
523.66/155.54	 strict:
523.66/155.54	  top(ok(U(x,y))) -> top(check(D(x,y)))
523.66/155.54	  D(x,B()) -> U(x,B())
523.66/155.54	  F(x,U(O(y),z)) -> U(x,F(y,z))
523.66/155.54	  F(x,U(N(y),z)) -> U(x,F(y,z))
523.66/155.54	  D(O(x),F(y,z)) -> F(x,D(y,z))
523.66/155.54	  D(N(x),F(y,z)) -> F(x,D(y,z))
523.66/155.54	  F(x,U(E(),y)) -> U(x,F(E(),y))
523.66/155.54	  D(E(),F(x,y)) -> F(E(),D(x,y))
523.66/155.54	 weak:
523.66/155.54	  U(O(x),y) -> U(x,y)
523.66/155.54	  U(N(x),y) -> U(x,y)
523.66/155.54	  D(O(x),y) -> D(x,y)
523.66/155.54	  D(N(x),y) -> D(x,y)
523.66/155.54	  E() -> N(E())
523.66/155.54	  check(O(x)) -> ok(O(x))
523.66/155.54	  check(U(x,y)) -> U(check(x),y)
523.66/155.54	  check(U(x,y)) -> U(x,check(y))
523.66/155.54	  check(D(x,y)) -> D(check(x),y)
523.66/155.54	  check(D(x,y)) -> D(x,check(y))
523.66/155.54	  check(F(x,y)) -> F(check(x),y)
523.66/155.54	  check(F(x,y)) -> F(x,check(y))
523.66/155.54	  check(O(x)) -> O(check(x))
523.66/155.54	  check(N(x)) -> N(check(x))
523.66/155.54	  U(ok(x),y) -> ok(U(x,y))
523.66/155.54	  U(x,ok(y)) -> ok(U(x,y))
523.66/155.54	  D(ok(x),y) -> ok(D(x,y))
523.66/155.54	  D(x,ok(y)) -> ok(D(x,y))
523.66/155.54	  F(ok(x),y) -> ok(F(x,y))
523.66/155.54	  F(x,ok(y)) -> ok(F(x,y))
523.66/155.54	  O(ok(x)) -> ok(O(x))
523.66/155.54	  N(ok(x)) -> ok(N(x))
523.66/155.54	
523.66/155.54	Proof:
523.66/155.54	 Unfolding Processor:
523.66/155.54	  loop length: 5
523.66/155.54	  terms:
523.66/155.54	   top(ok(U(O(x426584),B())))
523.66/155.54	   top(check(D(O(x426584),B())))
523.66/155.54	   top(D(check(O(x426584)),B()))
523.66/155.54	   top(U(check(O(x426584)),B()))
523.66/155.54	   top(U(ok(O(x426584)),B()))
523.66/155.54	  context: []
523.66/155.54	  substitution:
523.66/155.54	   x426584 -> x426584
523.66/155.54	  Qed
523.66/155.54	EOF