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Proof step 4 from proof fits-law-neg (previous step)

⊦ b2i(by) + cast(16, ~ b2i(by)) = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ n→i(# int2bits(j)) ≤ i → cast(i, j) = j
Proof step 6:
¬ n→i(# int2bits(~ b2i(by))) ≤ 16 ⊦ b2i(by) + cast(16, ~ b2i(by)) = 0

Rule argument

seq: ⊦ n→i(# int2bits(j)) ≤ i → cast(i, j) = j subst: [j, i] → [~ b2i(by), 16] rotate: F spec: intops inst: name: cast-size-fits

Additional information

Used simplifier rules: ⊦ ~ i + i = 0;% ⊦ i + j + i0 = (i + j) + i0;% ⊦ i + j = j + i; Used terms: ~ b2i(by), 16