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Proof step 4 from proof okbytearray (previous step)

validrefvalnotnull(str, st[rk], mkarraytype(byte_type), st), rk ∈ st ⊦ okbytearray(st[rk] .refval, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ validrefvalnotnull(str, val, ty, st) ↔ is_referencevalue(val) ∧ validrefnotnull(str, val .refval, ty, st)
Proof step 3:
⊦ ¬ okbytearray(r, st) → ¬ validrefnotnull(str, r, mkarraytype(byte_type), st)

Rule argument

[crewrite-arg: validrefvalnotnull-def , F , [st, ty, val, str] → [st, mkarraytype(byte_type), st[rk], str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, mkarraytype(byte_type), st[rk], str)]]