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Proof step 7 from proof validrefnotnull-put-byteval (previous step)

validref(str, r0, ty, st), is_bytevalue(st[r -- mkfs(class, byte_type, fieldvar) ']) ⊦ r0 = jvmref, r = jvmref, mkfs(class, byte_type, fieldvar) ' = _length, validrefnotnull(str, r0, ty, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ validrefnotnull(str, r, ty, st) ↔ r ≠ jvmref ∧ validref(str, r, ty, st)
Proof step 6:
validref(str, r0, ty, st), is_bytevalue(st[r -- mkfs(class, byte_type, fieldvar) ']) ⊦ r0 = jvmref, r = jvmref, mkfs(class, byte_type, fieldvar) ' = _length, r0 ≠ jvmref ∧ validref(str, r0, ty, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)])

Rule argument

[crewrite-arg: validrefnotnull-def , F , [st, ty, r, str] → [st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)], ty, r0, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)], ty, r0, str)]]