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Proof step 9 from proof validrefkeynotnull-put-byteval (
previous step
)
⊦ r ≠ jvmref ∧ sk ≠ _length ∧ sk ≠ _type ∧ ¬ is_indexkey(sk) ∧ sk .fs .type = byte_type ∧ is_bytevalue(st[r -- sk]) ∧ validrefnotnull(str, r0, ty, st) → validrefnotnull(str, r0, ty, st[r -- sk, byteval(by)])
Lemma
validrefnotnull-put-byteval