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Proof step 15 from proof lookup-append (previous step)

⊦ sks = [], sks0 = [], st[r -- (sks + sks0)] = st[st[r -- sks] .refval -- sks0]

User applied rule structural induction

And obtained the following new goals

Proof step 14:
∀ sks0, st, r. sks1 = [] ∨ sks0 = [] ∨ st[r -- (sks1 + sks0)] = st[st[r -- sks1] .refval -- sks0] ⊦ sk + sks1 = [], sks0 = [], st[r -- ((sk + sks1) + sks0)] = st[st[r -- (sk + sks1)] .refval -- sks0]

Rule argument

[VARWITHVARSEQSARG : sks, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : storekeys generated by [], +;])]]