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Proof step 7 from proof datasize-append-lower-h (previous step)

buf0[m0] = empty, m0 < # buf0, ∀ buf0, buf1. m0 ≤ # buf0 → datasize(buf0 + buf1, m0) = datasize(buf0, m0) ⊦ (buf0[m0] = empty ⊃ datasize(buf0 + buf1, m0);m0 + 1) = (buf0[m0] = empty ⊃ datasize(buf0, m0);m0 + 1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
buf0[m0] = empty, m0 < # buf0, ∀ buf0, buf1. m0 ≤ # buf0 → datasize(buf0 + buf1, m0) = datasize(buf0, m0) ⊦ datasize(buf0 + buf1, m0) = datasize(buf0, m0)

Proof step 7 from proof datasize-append-lower-h (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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