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Proof step 4 from proof validFields-addobj (previous step)

⊦ r = r0, unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, st) ↔ validFields(r, fis, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[speclemmaarg: , validFields(r, fis, st) ↔ unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, st) ,[st, fis, r] → [st, fis, r] ,F ,okfuns , ,validFields ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, fis, r)]]