| ⊦ 0 ≤ i ∧ i < st[r -- _length] .intval ∧ okbytearray(r, st) → st[r -- i '] ≠ refval(r1) |
st[r -- i '] = refval(r1), i < st[r -- _length] .intval, okbytearray(r, st), 0 ≤ i, 0 < st[r -- _length] .intval ⊦
[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j], [CSIMPFORWARD : ⊦ i < j ∧ 0 ≤ i → 0 < j])]]