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Proof step 4 from proof pathex-not-is-validref-02 (previous step)

∃ refs. refs ≠ [] ∧ refs .first = r ∧ refs .last = r1 ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st) ⊦ r = jvmref, is_valid_ref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

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

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]