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Proof step 8 from proof datasize-append-lower-h (previous step)

buf0[m0] = empty, m0 < # buf0, ∀ buf0, buf1. m0 ≤ # buf0 → datasize(buf0 + buf1, m0) = datasize(buf0, m0) ⊦ datasize(buf0 + buf1, m0) = datasize(buf0, m0)

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 3 terms: buf0, buf1

Additional information

Used simplifier rules: ⊦ m < n → m ≤ n; (s) Used terms: buf0, buf1