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Proof step 5 from proof payload-shift-left (previous step)

zbrar[n] = mkzentry(key, adr), zbrar[n].entry?, n < # zbrar, nused < # zbrar, sorted(zbrar, 0, nused + 1), n ≤ nused ⊦ payload(shl(zbrar, n, nused + 1), 0, nused) = payload(zbrar, 0, nused + 1) -- key

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
zbrar[n] = mkzentry(key, adr), n < # zbrar, nused < # zbrar, sorted(zbrar, 0, nused + 1), n ≤ nused ⊦ payload(shl(zbrar, n, nused + 1), 0, nused) = payload(zbrar, 0, nused + 1) -- key

Rule argument

Additional information

Used simplifier rules: ⊦ mkzentry(key, adr).entry?; (s)