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Proof step 2 from proof datasize-le-fwd (previous step)

m ≤ datasize(buf) ⊦ m ≤ # buf

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
⊦ datasize(buf) = datasize(buf, # buf)
Proof step 4:
⊦ ¬ n < datasize(buf, n)

Rule argument

Additional information

Used simplifier rules: datasize: ⊦ datasize(buf) = datasize(buf, # buf);%datasize-is-smaller-help: ⊦ ¬ n < datasize(buf, n);% ⊦ m < n → n ≠ 0; (s)%fle: ⊦ m < n ∧ n ≤ n0 → m < n0; (forward) from specification nat%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic% ⊦ m ≤ n ↔ ¬ n < m; (ss)