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Proof step 1 from proof valid-recs-next-samerecs (conclusion)

m < # apebs, # wlar = # apebs, stat ≠ used ⊦ valid-recs(subarray(apebs, 0, m), subarray(wlar, 0, m), recs) → valid-recs(subarray(apebs, 0, m + 1), subarray(wlar[m, wl-entry(m0, stat)], 0, m + 1), recs)

System applied rule normalize

And obtained the following new goals

Proof step 2:
# wlar = # apebs, m < # apebs, valid-recs(subarray(apebs, 0, m), subarray(wlar, 0, m), recs) ⊦ stat = used, valid-recs(subarray(apebs, 0, m + 1), subarray(wlar[m, wl-entry(m0, stat)], 0, m + 1), recs)

Proof step 1 from proof valid-recs-next-samerecs (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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