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Proof step 99 from proof validref-refs-last-valid-subset (previous step)

mkfs(class, ty0, fieldvar) ' ∈ instfields(class0), validref(str, r0, mkclasstype(class0), st) ⊦ is_array(r0, st), r0 = jvmref, r0 = jvmref, r0 -- mkfs(class, ty0, fieldvar) ' ∈ st

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[speclemmaarg: , r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty) → ¬ validref(str, r, ty, st) ,[st, ty, r, str] → [st, mkclasstype(class0), r0, str] ,F ,junkrefs , ,validref-is-junk ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ r -- sk ∈ st ∧ sk ∈ instfields(class) ∧ st[r -- _type] .type ≤ mkclasstype(class) ∧ r ≠ jvmref → ¬ is_valid_ref(str, r, st)])], [EXTRATERMS : (st, mkclasstype(class0), r0, str)]]