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Proof step 3 from proof validrefkeynotnull-validrefnotnull (previous step)

validrefvalnotnull(str, st[rk], ty1, st), rk ∈ st ⊦ validrefnotnull(str, st[rk] .refval, ty1, 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)

Rule argument

[crewrite-arg: validrefvalnotnull-def , F , [st, ty, val, str] → [st, ty1, st[rk], str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty1, st[rk], str)]]