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Proof step 5 from proof junkref-put-null (previous step)

is_reftype(ty), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r0 -- mkfs(class, ty, fieldvar) ', refval(jvmref)]), r ≠ r0 ∨ _type ≠ mkfs(class, ty, fieldvar) ' ⊦ junkref(str, r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ ¬ junkrefs(str, refs, ty, st) ∧ is_reftype(fs .type) → ¬ junkrefs(str, refs, ty, st[r -- fs ', refval(jvmref)])
Proof step 4:
⊦ ¬ junkref(str, r, st) → (junkrefs(str, r ' + refs0, st[r -- _type] .type, st) ↔ false)

Rule argument

[crewrite-arg: junkrefs-put-null-01 , F , [fs, r, st, ty, refs, str] → [mkfs(class, ty, fieldvar), r0, st, st[r -- _type] .type, r ' + refs0, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty])], [EXTRATERMS : (mkfs(class, ty, fieldvar), r0, st, st[r -- _type] .type, r ' + refs0, str)]]