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Proof step 3 from proof getbytearray-one (previous step)

st[r -- _length] .intval = 1 ⊦ getbytearray(r, st) = st[r -- 0 '] .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 2:
⊦ getbytearray(r, i, 1, st) = st[r -- i '] .byteval '

Rule argument

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

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ by ' = by0 ' ↔ by = by0])], [EXTRATERMS : (st, r)]]