NO

1 decompositions
 #1 -----------
   1: +(0(),x1) -> x1
   2: +(s(x2),x3) -> s(+(x2,x3))
   3: +(x4,+(x5,x6)) -> +(+(x4,x5),x6)

unjoinable peak
    +(x16,x18)
*<- +(x16,+(0(),x18)) ->*
    +(+(x16,0()),x18)