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Proof step 87 from proof ushort-band-shift (previous step)

(i0 * 256 + j0) + 255 = 256 * (i0 + 1) + (j0 - 1), abs(j0) < 256, ~65536 ≤ (i0 * 256 + j0) * 256 + j, ~256 < j, j < 0, ~256 ≤ j, ~255 ≤ i0 * 256 + j0, j0 ≤ 0, i0 ≤ 0, i0 * 256 + j0 < 0, (i0 * 256 + j0) * 256 + j < 0 ⊦ j = 0, 255 + j0 = ((i0 * 256 + j0) + 255) % 256

User applied rule insert equation

And obtained the following new goals

Rule argument

pos: left 1 flags: discard

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