| ⊦ r1 = r, getbytearray(r1, st[r -- sk, val]) = getbytearray(r1, st) |
⊦ getbytearray(r, st) = getbytearray(r, 0, st[r -- _length] .intval, st)
⊦ r1 = r, getbytearray(r1, 0, (st[r -- sk, val][r1 -- _length]) .intval, st[r -- sk, val]) = getbytearray(r1, st)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r -- sk, val], r1)]]