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Proof step 6 from proof validmode-throw-predef (previous step)

is_predefined_class(class), class ≤ `java.lang.Throwable' .class, newref(r, st) ⊦ r = jvmref, validref(str, r, mkclasstype(class), addobj(r, class, [], st))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 5:
⊦ is_predefined_class(class) ∧ newref(r, st) → ¬ junkref(str, r, addobj(r, class, [], st))

Rule argument

[crewrite-arg: validref-def , F , [st, ty, r, str] → [addobj(r, class, [], st), mkclasstype(class), r, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (addobj(r, class1, [], st) [r -- _type ] ) = typeval(mkclasstype(class1))], [CSIMPSEQ : ⊦ typeval(ty) .type = ty], [CSIMPSEQ : ⊦ mkclasstype(class1) ≤ mkclasstype(class2) ↔ class1 ≤ class2], [CSIMPSEQ : ⊦ class ≤ class])], [EXTRATERMS : (addobj(r, class, [], st), mkclasstype(class), r, str)]]