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Proof step 1 from proof invx (conclusion)

⊦ inv(a, Pelem) ∧ p*(a, b) → Pelem(b)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
inv(a, Pelem), p*(a, b) ⊦ Pelem(b)

Rule argument

Additional information