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Proof step 4 from proof pot2-ls-pred-01 (previous step)

¬ 0 < i ⊦ 2 ^ (i - 1) + 1 < 2 ^ i ↔ 1 < i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
i ≤ 0, 2 ^ (i - 1) + 1 < 2 ^ i ⊦

Rule argument

Additional information

Used simplifier rules: numleledel: j0 ≠ 0, j ≤ j0 ⊦ i ≤ (* j) → i ≤ (* j0); from specification int-abs%forward-lsle: ⊦ i < j ∧ j ≤ j0 → i < j0; (forward) from specification int-abs%forward-le-05: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward) from specification int-abs%forward-pos: ⊦ i < j ∧ 0 < i → 0 < j ∧ 1 < j; (forward) from specification int-basic1%forward-le-04: ⊦ j ≤ i ∧ i ≤ 0 → j ≤ 0; (forward) from specification int-abs%lels: ⊦ ¬ i < j ↔ j ≤ i; from specification int-abs