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Proof step 2 from proof copy-stream-append (previous step)

n0 + m ≤ # buf0, n1 + m ≤ # buf1 ⊦ ⌜copy(buf0, n0, buf1, n1, m)⌝ = (⌜buf1⌝ to n1) + ((⌜buf0⌝ from n0) to m) + ((⌜buf1⌝ from n1 + m) to (# buf1 - n1 + m))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
n1 + m ≤ # buf1, n0 + m ≤ # buf0 ⊦ ⌜copy(buf0, n0, buf1, n1, m)⌝ = (⌜buf1⌝ to n1) + ((⌜buf0⌝ from n0) to m) + ((⌜buf1⌝ from n1 + m) to (# buf1 - n1 + m))

Proof step 2 from proof copy-stream-append (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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