YES

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

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

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