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Proof step 6 from proof junkrefs-subclass (previous step)

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)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ ¬ junkrefs(str, r ' + refs, st[r -- _type] .type, st) ∧ r ≠ jvmref → (junkrefs(str, r ' + refs, ty, st) ↔ ¬ st[r -- _type] .type ≤ ty)
Proof step 5:
is_obj(r, st) ⊦ r = jvmref, junkrefs(str, r ' + refs0, st[r -- _type] .type, st), st[r -- _type] .type ≤ mkclasstype(`java.lang.Object' .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]