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Proof step 7 from proof junkrefs-subclass (previous step)

is_obj(r, st), junkrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ junkrefs(str, r ' + refs0, st[r -- _type] .type, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ r = jvmref → ¬ junkrefs(str, r ' + refs, ty, st)
Proof step 6:
r ≠ jvmref, is_obj(r, st), junkrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ junkrefs(str, r ' + refs0, st[r -- _type] .type, st)

Rule argument

[crewrite-arg: junkrefs-null , F , [st, ty, refs, r, str] → [st, mkclasstype(`java.lang.Object' .class), refs0, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, mkclasstype(`java.lang.Object' .class), refs0, r, str)]]