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Proof step 4 from proof linearity (previous step)

∃ x. path(r ' + x, H) ∧ (r ' + x).last = r0, reachable(r, r1, H), r0 ∈ H, r1 ∈ H ⊦ reachable(r0, r1, H), reachable(r1, r0, H)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information