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Proof step 25 from proof cast-law-add-pos (previous step)

j1 + j0 = i1 + 2 ^ i, 0 ≤ i, 0 ≤ i0, 0 ≤ j1, j1 < 2 ^ i, 2 ^ (i - 1) ≤ j1, 0 < i, 0 ≤ j0, 0 ≤ j1 + j0 ⊦ cast(i, j1 + j0) = cast(i, i1)

User applied rule insert equation

And obtained the following new goals

Proof step 26:
j1 + j0 = i1 + 2 ^ i, 0 ≤ i, 0 ≤ i0, 0 ≤ j1, j1 < 2 ^ i, 2 ^ (i - 1) ≤ j1, 0 < i, 0 ≤ j0, 0 ≤ i1 + 2 ^ i ⊦ cast(i, i1 + 2 ^ i) = cast(i, i1)

Rule argument

pos: left 1 flags:

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