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Proof step 6 from proof cyclic-def-object (previous step)

∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st), is_obj(str, r, st) ⊦ ∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, st[refs .first -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
dups(refs), validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st), is_obj(str, refs .first, st) ⊦ ∃ refs0. dups(refs0) ∧ refs0 .first = refs .first ∧ validrefs(str, refs0, st[refs0 .first -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]