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Proof step 8 from proof unchNorec-isvalidref (conclusion)

⊦ unchangedNorec(r, st, st0) ∧ is_valid_ref(str, r, st) → (¬ is_valid_ref(str, r, st0) ↔ false)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
unchangedNorec(r, st, st0), is_valid_ref(str, r, st) ⊦ is_valid_ref(str, r, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]