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Proof step 85 from proof getsetShort-theorem (previous step)

j ≤ 32767, ub2i(i2b(j)) < 256, ~128 ≤ j / 256, j / 256 ≤ 127, 0 ≤ ub2i(i2b(j)), 0 ≤ j ⊦ ub2i(i2b(j)) + 256 * j / 256 = j

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 86:
⊦ 0 ≤ b2i(by) → ub2i(by) = b2i(by)
Proof step 87:
¬ 0 ≤ b2i(i2b(j)), j ≤ 32767, ub2i(i2b(j)) < 256, ~128 ≤ j / 256, j / 256 ≤ 127, 0 ≤ ub2i(i2b(j)), 0 ≤ j ⊦ ub2i(i2b(j)) + 256 * j / 256 = j
Proof step 90:
0 ≤ b2i(i2b(j)), j ≤ 32767, b2i(i2b(j)) < 256, ~128 ≤ j / 256, j / 256 ≤ 127, 0 ≤ b2i(i2b(j)), 0 ≤ j ⊦ b2i(i2b(j)) + 256 * j / 256 = j

Rule argument

spec: inst: name: ubyte-pos seq: ⊦ 0 ≤ b2i(by) → ub2i(by) = b2i(by) subst: [by] → [i2b(j)] flags: rewrite, current

Additional information

Used terms: i2b(j)