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Proof step 17 from proof rg2-lem1-term-unfair (previous step)

□ (R1(pm, S', S'') ∧ R2(pm, S', S'')), [:S | Boolvar ::- [PL S = s1] ∥nf false ::- [PL N = n ∧ S = s4 ∧ □ ¬ N' < N'']], □ (N = N' ∧ ¬ N' < N''), boolvar ∨ n2 = N + 1 ∧ N = N'' + 1 until Boolvar, INDHYP-nat(n2) ∧ INDHYP-nat0(n2), R1(pm, s2, S), I(pm, s2), I(pm, s3), 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 ≤ n2, I(pm, s), G1(pm, s2, s2), G2(pm, s2, s3), n ≤ n2, R2(pm, s2, s2), R1(pm, s2, s3), I(pm, S), ¬ R2(pm, s3, s4), ¬ R1(pm, s2, s1), boolvar1 → s2 = s3 ∧ (boolvar ↔ boolvar0) ⊦ ◇ last

User applied rule step

And closed the goal!

Rule argument

args:[positions: , ]

Additional information

Used simplifier rules: lels: ⊦ ¬ m < n ↔ n ≤ m; from specification nat