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Proof step 15 from proof add-gft (previous step)

is_classtype(ty0) ⊦ r = r0, r0 -- mkfs(class, ty0, fieldvar) ' ∈ st ∧ oktype(st[r0 -- mkfs(class, ty0, fieldvar) '], ty0, addarray(r, ty, vals, st)) ↔ r0 -- mkfs(class, ty0, fieldvar) ' ∈ st ∧ oktype(st[r0 -- mkfs(class, ty0, fieldvar) '], ty0, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 9:
⊦ is_classtype(ty) ↔ (∃ class. ty = mkclasstype(class))
Proof step 14:
∃ class. ty0 = mkclasstype(class) ⊦ r = r0, r0 -- mkfs(class, ty0, fieldvar) ' ∈ st ∧ oktype(st[r0 -- mkfs(class, ty0, fieldvar) '], ty0, addarray(r, ty, vals, st)) ↔ r0 -- mkfs(class, ty0, fieldvar) ' ∈ st ∧ oktype(st[r0 -- mkfs(class, ty0, fieldvar) '], ty0, st)

Rule argument

[speclemmaarg: ,is_classtype(ty) ↔ (∃ class. ty = mkclasstype(class)) ,[ty] → [ty0] ,F ,javatype , ,ex-03 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (ty0)]]