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Proof step 4 from proof unchanged-def-keep (conclusion)

⊦ ¬ (∀ r0. (path∃(str, r, r0, st) ↔ path∃(str, r, r0, st0)) ∧ (path∃(str, r, r0, st) → unchangedNorec(r0, st, st0))) → ¬ unchanged(str, r, st, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
unchanged(str, r, st, st0) ⊦ (path∃(str, r, r0, st) ↔ path∃(str, r, r0, st0)) ∧ (path∃(str, r, r0, st) → unchangedNorec(r0, st, st0))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]