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Proof step 13 from proof validref-put-byteval (previous step)

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)])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 12:
sk .fs .type = byte_type, is_bytevalue(st[r -- sk]), r0 = jvmref ∨ st[r0 -- _type] .type ≤ ty ∧ ¬ junkref(str, r0, st), is_fskey(sk) ⊦ sk = _type, sk = _length, r = jvmref, validref(str, r0, ty, st[r -- sk, byteval(by)])

Rule argument

[crewrite-arg: validref-def, F, [st, ty, r, str] → [st, ty, r0, str]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty, r0, str)]]