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Proof step 4 from proof junkrefs-subclass (previous step)

¬ (r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ st[r -- _type] .type)), is_obj(r, st) ⊦ r = jvmref, junkrefs(str, r ' + refs0, st[r -- _type] .type, st), st[r -- _type] .type ≤ mkclasstype(`java.lang.Object' .class)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_valid_ref(str, r, st) ∧ r ≠ jvmref → st[r -- _type] .type ≤ mkclasstype (`java.lang.Object' .class)], [CSIMPSEQ : ⊦ ty ≤ ty])]]