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Proof step 4 from proof pathex-null (previous step)

⊦ r ≠ jvmref → ¬ (∃ refs. refs ≠ [] ∧ refs .first = jvmref ∧ refs .last = r ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
refs .first = jvmref, validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st) ⊦ refs = [], refs .last = jvmref

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]