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Proof step 4 from proof bar-at-01 (previous step)

n→i(n) < st[r -- _length] .intval, 0 < st[r -- _length] .intval ⊦ (getbytearray(r, st)[n]) = st[r -- n→i(n) '] .byteval

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ getbytearray(r, st) = getbytearray(r, 0, st[r -- _length] .intval, st)
Proof step 3:
n→i(n) < st[r -- _length] .intval, 0 < st[r -- _length] .intval ⊦ (getbytearray(r, 0, st[r -- _length] .intval, st)[n]) = st[r -- n→i(n) '] .byteval

Rule argument

[crewrite-arg: getByteArray-all, F, [st, r] → [st, r]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, r)]]