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

st[r -- _type] .type ≤ ty0, validref(str, r1, ty, st), ty ≤ ty1, is_reftype(ty1), junkref(str, r, st[r0 -- mkfs(class, ty1, fieldvar) ', refval(r1)]), r ≠ r0 ∨ _type ≠ mkfs(class, ty1, fieldvar) ' ⊦ r = jvmref, junkref(str, r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ ¬ junkref(str, r, st) ∧ validref(str, r1, ty, st) ∧ ty ≤ fs .type ∧ is_reftype(fs .type) → ¬ junkref(str, r, st[r0 -- fs ', refval(r1)])

Rule argument

[crewrite-arg: junkref-put-refval , F , [str, r, st, r1, ty, fs, r0] → [str, r, st, r1, ty, mkfs(class, ty1, fieldvar), r0] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty])], [EXTRATERMS : (str, r, st, r1, ty, mkfs(class, ty1, fieldvar), r0)]]