NO

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

unjoinable peak
    +(+(x,*(x,_y16)),s(_y16))
*<- *(s(x),s(_y16)) ->*
    s(+(x,*(s(x),_y16)))