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Proof step 5 from proof reachable-nodups-def (previous step)

∃ x. path(r ' + x, H) ∧ (r ' + x).last = r0 ⊦ ∃ x. path(r ' + x, H) ∧ (r ' + x).last = r0 ∧ ¬ r ∈ x ∧ ¬ dups(x)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information