YES

1 decompositions
 #0 -----------
   1: +(0(),x) -> x
   2: +(+(x,y),z) -> +(x,+(y,z))
   3: +(x,y) -> +(y,x)

@Jouannaud and Kirchner's criterion
--- R
   1: +(0(),x) -> x
   2: +(+(x,y),z) -> +(x,+(y,z))
   3: +(x,y) -> +(y,x)

--- S
   1: +(0(),x) -> x
   2: +(+(x,y),z) -> +(x,+(y,z))
   3: +(x,y) -> +(y,x)