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Proof step 223 from proof rg2-lem1-term-unfair (previous step)

□ (R1(pm, S', S'') ∧ R2(pm, S', S'')), [:S | Boolvar ::- [PL N = n56 ∧ S = s69 ∧ N' = N'' + 1 until ¬ R1(pm, S', S'') ∧ R1(pm, S', S'') -+-> (last ⊃ Post1(pm, s, S);G1(pm, S, S'))] ∥nf false ::- [PL S = s68 ∧ N = n55 ∧ □ ¬ N' < N'' ∧ R2(pm, S', S'') -+-> (last ⊃ Post2(pm, s, S);G2(pm, S, S')) ∧ ◇ last] ], □ (N = N' ∧ ¬ N' < N''), boolvar ∨ n56 = N ∧ N = N'' + 1 until Boolvar, INDHYP-nat(n56 + 1) ∧ INDHYP-nat0(n56 + 1), R2(pm, s2, S), I(pm, s3), I(pm, s2), RG-restr(pm, R1, G1, Pre1, Post1, I, R2, G2, Pre2, Post2), Pre1(pm, s), Pre2(pm, s), R1(pm, s3, S), R2(pm, s3, S), N ≤ n56 + 1, I(pm, s), G2(pm, s2, s2), R2(pm, s2, s68), G1(pm, s2, s3), R1(pm, s3, s69), n55 ≤ n56 + 1, R2(pm, s2, s3), R1(pm, s2, s2), I(pm, s68), I(pm, s69), I(pm, S), boolvar1 → s2 = s3 ∧ (boolvar ↔ boolvar0) ⊦ ◇ last

User applied rule case distinction

And obtained the following new goals

Rule argument

pos: left 4

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