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Proof step 6 from proof is_obj-field-norefval (previous step)

st[r -- _type] = typeval(mkclasstype(class)), goodfieldsandtypes(r, instfields(class), st), class+∃(str, class), r ∈ st, mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_reftype(ty), r -- _type ∈ st ⊦ r = jvmref, is_referencevalue(st[r -- mkfs(class0, ty, fieldvar) ']), is_abstract(class)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ goodfieldsandtypes(r, sks, st) ↔ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, st))
Proof step 5:
st[r -- _type] = typeval(mkclasstype(class)), ∀ sk. sk ∈ instfields(class) → goodfieldandtype(r, sk, st), class+∃(str, class), r ∈ st, mkfs(class0, ty, fieldvar) ' ∈ instfields(class), is_reftype(ty), r -- _type ∈ st ⊦ r = jvmref, is_referencevalue(st[r -- mkfs(class0, ty, fieldvar) ']), is_abstract(class)

Rule argument

[speclemmaarg: , goodfieldsandtypes(r, sks, st) ↔ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, st)) ,[st, sks, r] → [st, instfields(class), r] ,F ,okfuns , ,gfts-all ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, instfields(class), r)]]