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Proof step 48 from proof validref-subspec-samesubclasses (previous step)

¬ (r ≠ jvmref ∧ ¬ is_valid_ref(str0, r, st)), st[r -- _type] = typeval(ty), same-subclasses-contains(`java.lang.Object' .class, str, str0), junkref(str, r, st), r -- _type ∈ st, ty ≤ mkclasstype(`java.lang.Object' .class), r ∈ st ⊦ r = jvmref, is_arraytype(ty), junkref(str0, r, st), same-subclasses-contains(ty .class, str, str0), ty .class ≤ `java.lang.Object' .class

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 47:
st[r -- _type] = typeval(ty), same-subclasses-contains(`java.lang.Object' .class, str, str0), junkref(str, r, st), r -- _type ∈ st, ty ≤ mkclasstype(`java.lang.Object' .class), r ∈ st, is_valid_ref(str0, r, st) ⊦ r = jvmref, is_arraytype(ty), junkref(str0, r, st), same-subclasses-contains(ty .class, str, str0), ty .class ≤ `java.lang.Object' .class

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]