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Proof step 9 from proof validFields-empty-01 (previous step)

validFields(r, fis, ∅) ⊦ fis = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ validFields(r, fis, st) ↔ unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, st)
Proof step 8:
unique_al(fis) ∧ ¬ _type ∈ fis ∧ ¬ _length ∈ fis ∧ hasKeys(r, fis .keys, ∅) ⊦ fis = []

Rule argument

[crewrite-arg: validFields, F, [st, fis, r] → [∅, fis, r]]

Additional information

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