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Proof step 6 from proof validref-put-badfield (previous step)

st[r -- _type] .type ≤ ty, junkref(str, r, st[r0 -- fs ', val]), r ≠ r0 ∨ _type ≠ fs ' ⊦ r = jvmref, junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[crewrite-arg: junkref-put-badfield , F , [val, fs, r0, st, r, str] → [val, fs, r0, st, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (val, fs, r0, st, r, str)]]