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Proof step 12 from proof add-gft (previous step)

⊦ r = r0, r0 -- mkfs(class, mkclasstype(class0), fieldvar) ' ∈ st ∧ is_referencevalue(st[r0 -- mkfs(class, mkclasstype(class0), fieldvar) ']) ↔ r0 -- mkfs(class, mkclasstype(class0), fieldvar) ' ∈ st ∧ oktype(st[r0 -- mkfs(class, mkclasstype(class0), fieldvar) '], mkclasstype(class0), st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 11:
⊦ oktype(val, mkclasstype(class1), st) ↔ is_referencevalue(val)

Rule argument

[speclemmaarg: ,oktype(val, mkclasstype(class1), st) ↔ is_referencevalue(val) ,[st, class1, val] → [st, class0, st[r0 -- mkfs(class, mkclasstype(class0), fieldvar) ']] ,F ,okfuns , ,oktype-class ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, class0, st[r0 -- mkfs(class, mkclasstype(class0), fieldvar) '])]]