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Proof step 21 from proof junkref-class-01 (previous step)

st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs, ty, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(r, st), class+∃(str, st[r -- _type] .type .class) ⊦ r0 = jvmref, ty = abstract_type, is_abstract(st[r -- _type] .type .class), is_reftype(ty)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 11:
⊦ is_obj(r, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st)
Proof step 20:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs, ty, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st), class+∃(str, st[r -- _type] .type .class) ⊦ r0 = jvmref, ty = abstract_type, is_abstract(st[r -- _type] .type .class), is_reftype(ty)

Rule argument

[speclemmaarg: , is_obj(r, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st) ,[st, r] → [st, r] ,F ,addfuns , ,is-any-object ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, r)]]