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Proof step 14 from proof validref-put-byteval (conclusion)

⊦ r ≠ jvmref ∧ sk ≠ _length ∧ sk ≠ _type ∧ sk .fs .type = byte_type ∧ ¬ is_indexkey(sk) ∧ is_bytevalue(st[r -- sk]) ∧ validref(str, r0, ty, st) → validref(str, r0, ty, st[r -- sk, byteval(by)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 13:
sk .fs .type = byte_type, is_bytevalue(st[r -- sk]), validref(str, r0, ty, st), is_fskey(sk) ⊦ sk = _type, sk = _length, r = jvmref, validref(str, r0, ty, st[r -- sk, byteval(by)])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(sk) ↔ is_fskey(sk)])]]