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Proof step 2 from proof crash-neutral-markbad (previous step)

pebs0 = pebs, m < # pebs, mtd-cons(pebs) ⊦ ⟨mtd_asm_markbad#(m; pebs; err)⟩ (pebs0 = pebs), pebs[m].bad

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
pebs0 = pebs, m < # pebs, mtd-cons(pebs), ¬ pebs[m].bad ⊦ ⟨mtd_asm_markbad#(m; pebs; err)⟩ (pebs0 = pebs)

Rule argument

Additional information

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