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Proof step 15 from proof rg2-not-pre1-unfair (previous step)

□ (¬ last ∧ ¬ blocked), \E ∃ S0. ¬ Pre1(pm, S0), R2(pm, S', S'') -+-> G2(pm, S, S'), RG-restr(pm, R1, G1, Pre1, Post1, I, R2, G2, Pre2, Post2), Pre1(pm, S), Pre2(pm, s), I(pm, S), I(pm, s) ⊦ (R1(pm, S', S'') ∧ R2(pm, S', S'')) -+-> (G1(pm, S, S') ∨ G2(pm, S, S'))

User applied rule decompose

And closed the goal!

Rule argument

positions: 3, 1

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