| ⊦ r = r0, getbytearray(r, addarray(r0, ty, vals, st)) = getbytearray(r, st) |
⊦ getbytearray(r, st) = getbytearray(r, 0, st[r -- _length] .intval, st)
⊦ r = r0, getbytearray(r, 0, (addarray(r0, ty, vals, st)[r -- _length]) .intval, addarray(r0, ty, vals, st)) = getbytearray(r, st)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (addarray(r0, ty, vals, st), r)]]