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Proof step 2 from proof lf-used-valid-peb (previous step)

wlar[n] = wl-entry(m, used), apebs[n] = apeb, n < # wlar, valid-wl(apebs, wlar) ⊦ valid-peb(apeb)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
wlar[n] = wl-entry(m, used), n < # wlar, valid-wl(apebs, wlar) ⊦ valid-peb(apebs[n])

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (s)%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic