YES

1 decompositions
 #1 -----------
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(x3,x4) -> +(x4,x3)

@Rule Labeling
--- R
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(x3,x4) -> +(x4,x3)

--- S
   1: -(+(x1,x2)) -> +(-(x1),-(x2))
   2: +(x3,x4) -> +(x4,x3)