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Proof step 3 from proof instfields-subclass-in (previous step)

is_classtype(ty), ty ≤ mkclasstype(class), fs ' ∈ instfields(class) ⊦ fs ' ∈ instfields(ty .class)

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 2:
ty = mkclasstype(class0), is_classtype(ty), ty ≤ mkclasstype(class), fs ' ∈ instfields(class) ⊦ fs ' ∈ instfields(class0)

Rule argument

[speclemmaarg: ,is_classtype(ty) → (class = ty .class ↔ ty = mkclasstype(class)) ,[ty, class] → [ty, class0] ,T ,javatype , ,elim-02 ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ is_classtype(ty) → ( class = ty .class ↔ ty = mkclasstype(class))])], [EXTRATERMS : (ty, class0)]]