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

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

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]