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Proof step 4 from proof is_obj-put-equiv (previous step)

mkfs(`java.lang.Object' .class, void_type, `type' .field) ' .fs = mkfs(class, ty, fieldvar), r1 ∈ st, okval(val, ty), r1 -- mkfs(`java.lang.Object' .class, void_type, `type' .field) ' ∈ st, okval(st[r1 -- mkfs(`java.lang.Object' .class, void_type, `type' .field) '], ty) ⊦ ty = void_type, class+∃(str, val .type .class) ∧ ¬ is_abstract(val .type .class) ∧ is_obj(r1, st[r1 -- mkfs(`java.lang.Object' .class, void_type, `type' .field) ', val]) ↔ is_obj(str, r1, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ fs ' .fs = fs

Rule argument

[speclemmaarg: ,fs ' .fs = fs ,[fs] → [mkfs(`java.lang.Object' .class, void_type, `type' .field)] ,F ,storekey , ,sel-05 ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) = mkfs(class0, ty0, fieldvar0) ↔ class = class0 ∧ ty = ty0 ∧ fieldvar = fieldvar0])], [EXTRATERMS : (mkfs (`java.lang.Object' .class, void_type, `type' .field))]]