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Proof step 3 from proof lookup-six (previous step)

⊦ st[st[r -- sk] .refval -- (sk0 ' + sk1 ' + sk2 ' + sk3 ' + sk4 ')] = st[st[st[st[st[st[r -- sk] .refval -- sk0] .refval -- sk1] .refval -- sk2] .refval -- sk3] .refval -- sk4]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ st[r -- (sk ' + sk0 ' + sk1 ' + sk2 ' + sk3 ')] = st[st[st[st[st[r -- sk] .refval -- sk0] .refval -- sk1] .refval -- sk2] .refval -- sk3]

Rule argument

[crewrite-arg: lookup-five , F , [sk3, sk2, sk1, sk0, sk, r, st] → [sk4, sk3, sk2, sk1, sk0, st[r -- sk] .refval, st] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sk4, sk3, sk2, sk1, sk0, st[r -- sk] .refval, st)]]