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Proof step 1 from proof modnotreachable-reachable-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 closed the goal!

Rule argument

Additional information

Used simplifier rules: modnotreachable-reachable: ⊦ reachable(r, r0, H) ∧ ¬ reachable(r, r1, H) → (¬ reachable(r, r0, H[r1, ce]) ↔ false);