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Proof step 1 from proof endnotinH-notreachable (conclusion)

⊦ ¬ r0 ∈ H → (reachable(r, r0, H) ↔ false)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: reachable-notnullinH: ⊦ reachable(r, r1, H) → (¬ r1 ∈ H ↔ false);