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Proof step 4 from proof validref-forward-01 (previous step)

is_reftype(fs .type), fs ' ∈ instfields(class), validref(str, r, mkclasstype(class), st0) ⊦ r = jvmref, validref(str, st0[r -- fs '] .refval, fs .type, st0)

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 3:
fs = mkfs(class0, ty, fieldvar), is_reftype(ty), fs ' ∈ instfields(class), validref(str, r, mkclasstype(class), st0) ⊦ r = jvmref, validref(str, st0[r -- fs '] .refval, ty, st0)

Rule argument

[speclemmaarg: , class = fs .class ∧ ty = fs .type ∧ fieldvar = fs .field ↔ fs = mkfs(class, ty, fieldvar) ,[fs, class, ty, fieldvar] → [fs, class0, ty, fieldvar] ,T ,fieldspec , ,elim ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ class = fs .class ∧ ty = fs .type ∧ fieldvar = fs .field ↔ fs = mkfs(class, ty, fieldvar)])], [EXTRATERMS : (fs, class0, ty, fieldvar)]]