| ⊦ r = r0, getarray(r, st[r0 -- sk, val]) = getarray(r, st) |
⊦ getarray(r, st) = getarray(r, 0, st[r -- _length] .intval, st)
⊦ r = r0, getarray(r, 0, (st[r0 -- sk, val][r -- _length]) .intval, st[r0 -- sk, val]) = getarray(r, st)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r0 -- sk, val], r)]]