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Proof step 6 from proof validFields-addobj (previous step)

⊦ r = r0, validFields(r, fis, addobj(r0, class, fis0, st)) ↔ validFields(r, fis, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validFields(r, fis, st) ↔ unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, st)
Proof step 5:
⊦ r = r0, unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, addobj(r0, class, fis0, st)) ↔ validFields(r, fis, st)

Rule argument

[speclemmaarg: , validFields(r, fis, st) ↔ unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, st) ,[st, fis, r] → [addobj(r0, class, fis0, st), fis, r] ,F ,okfuns , ,validFields ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (addobj(r0, class, fis0, st), fis, r)]]