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Proof step 10 from proof bytes2int-size-04 (previous step)

8 * (2 + n→i(# bytes1)) - 1 = 8 + (8 * (1 + n→i(# bytes1)) - 1), b2i(by) < 0, 2 ^ (8 * (2 + n→i(# bytes1)) - 1) + 256 * bytes2int(by ' + bytes1) + band(255, b2i(by0)) < 0, ∀ by, bytes0. # bytes0 < #(bytes1 + by0 ') → b2i(by) < 0 ∧ 2 ^ ((n→i(# bytes0) + 1) * 8 - 1) + bytes2int(by ' + bytes0) < 0 → false ⊦

User applied rule insert equation

And obtained the following new goals

Proof step 11:
b2i(by) < 0, 2 ^ (8 + (8 * (1 + n→i(# bytes1)) - 1)) + 256 * bytes2int(by ' + bytes1) + band(255, b2i(by0)) < 0, ∀ by, bytes0. # bytes0 < #(bytes1 + by0 ') → b2i(by) < 0 ∧ 2 ^ ((n→i(# bytes0) + 1) * 8 - 1) + bytes2int(by ' + bytes0) < 0 → false ⊦

Rule argument

pos: left 1 flags: discard

Proof step 10 from proof bytes2int-size-04 (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information