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Proof step 2 from proof subarray-longer-eq-eq (previous step)

subarray(ar0, 0, n + m) = subarray(ar1, 0, n + m) ⊦ subarray(ar0, 0, n) = subarray(ar1, 0, n) ↔ true

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
copy(ar0, 0, mkarray(n + m), 0, n + m) = copy(ar1, 0, mkarray(n + m), 0, n + m) ⊦ copy(ar0, 0, mkarray(n), 0, n) = copy(ar1, 0, mkarray(n), 0, n)

Rule argument

Additional information

Used simplifier rules: Subarray: ⊦ subarray(ar, m, n) = copy(ar, m, mkarray(n), 0, n);