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Proof step 14 from proof remove-wbufs-rec (previous step)

n0 < # lpt ⊦ (n0 ∈ ns ⊃ lpt[n0].size:= LEB_SIZE;lpt[n0]) = lpt.mapIndices(ns, λ lp. lp.size:= LEB_SIZE)[n0], n0 = n, n ∈ ns

Heuristic if-then-else split applied rule case distinction

And obtained the following new goals

Proof step 15:
n0 < # lpt, n0 ∈ ns ⊦ lpt[n0].size:= LEB_SIZE = lpt.mapIndices(ns, λ lp. lp.size:= LEB_SIZE)[n0], n0 = n, n ∈ ns
Proof step 18:
n0 < # lpt ⊦ lpt[n0] = lpt.mapIndices(ns, λ lp. lp.size:= LEB_SIZE)[n0], n0 = n, n ∈ ns, n0 ∈ ns

Rule argument

pos: right 1

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