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Proof step 9 from proof idexcept-extract-right (previous step)

# ar0 = # ar1, n0 < # ar1, ∀ m. m < # ar1 ∧ m ≠ n → ar0[m] = ar1[m] ⊦ n0 = n, # ar1 = 0, ar1[n0] = ar0[n0]

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 3 terms: n0

Additional information

Used terms: n0