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Proof step 12 from proof okfieldinits-index (previous step)

sk ∈ fis .keys, okfieldinits(class, fis), is_indexkey(sk) ⊦

User applied rule structural induction

And obtained the following new goals

Proof step 11:
∀ sk, class. ¬ (sk ∈ fis0 .keys ∧ okfieldinits(class, fis0) ∧ is_indexkey(sk)), sk ∈ (fv + fis0) .keys, okfieldinits(class, fv + fis0), is_indexkey(sk) ⊦

Rule argument

[VARWITHVARSEQSARG : fis, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : fieldinits generated by [], +;], [CSIMPSEQ : ⊦ [] .keys = []], [CSIMPSEQ : ⊦ ¬ sk ∈ []])]]