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Proof step 3 from proof validref-is-junk-better (conclusion)

⊦ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty ∧ ¬ type∃(str, st[r -- _type] .type)) → ¬ validref(str, r, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
validref(str, r, ty, st), ¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty ∧ ¬ type∃(str, st[r -- _type] .type) ⊦ r = jvmref

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]