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Proof step 12 from proof copy-bet-low (previous step)

j0 = 2 * i0 + j - i + 1, 2 * i0 + j = (i + j0) + 1, (arraycopy(r, i, r, i0, j - 1, st[r -- (i0 + j - 1) ', st[r -- (i + j - 1) ']])[r -- j0 ']) = st[r -- (i + j - 1) '], i ≤ j0, j0 < i0 + j, i0 ≤ j0, i ≤ i0, i < i0 + j, 0 < j, ∀ j1, i, i0, j0, r, st. i→n(j1) < i→n(j) → (true → (i ≤ i0 ∧ i0 ≤ j0 ∧ j0 < i0 + j1 → (arraycopy(r, i, r, i0, j1, st)[r -- j0 ']) = st[r -- ((j0 - i0) + i) '])) ⊦ st[r -- (i + j - 1) '] = st[r -- (i + j0 - i0) ']

User applied rule insert equation

And obtained the following new goals

Proof step 11:
2 * i0 + j = (i + (2 * i0 + j - i + 1)) + 1, (arraycopy(r, i, r, i0, j - 1, st[r -- (i0 + j - 1) ', st[r -- (i + j - 1) ']])[r -- (2 * i0 + j - i + 1) ']) = st[r -- (i + j - 1) '], i ≤ 2 * i0 + j - i + 1, 2 * i0 + j - i + 1 < i0 + j, i0 ≤ 2 * i0 + j - i + 1, i ≤ i0, i < i0 + j, 0 < j, ∀ j1, i, i0, j0, r, st. i→n(j1) < i→n(j) → (true → (i ≤ i0 ∧ i0 ≤ j0 ∧ j0 < i0 + j1 → (arraycopy(r, i, r, i0, j1, st)[r -- j0 ']) = st[r -- ((j0 - i0) + i) '])) ⊦ st[r -- (i + j - 1) '] = st[r -- (i + (2 * i0 + j - i + 1) - i0) ']

Rule argument

[inserteqarg: pos: left 1,F,T,()]

Additional information

[[CONCRETESIMPRULES : ()]]