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Proof step 1 from proof modnotreachable-reachable-rev-weak (conclusion)

⊦ ¬ reachable(r, r0, H) ∧ ¬ reachable(r, r1, H) ∧ r0 ≠ null ∧ r0 ∈ H → (reachable(r, r1, H[r0, ce]) ↔ false)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information