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Proof step 4 from proof is_obj-refval (previous step)

¬ is_referencevalue(st[r -- mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ']), mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ' ∈ instfields(st[r -- _type] .type .class) ⊦ is_obj(str, r, st) → refval(st[r -- mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) '] .refval) = st[r -- mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ']

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
mkfs(str2 .class, mkclasstype(str0 .class), str1 .field) ' ∈ instfields(st[r -- _type] .type .class) ⊦ is_obj(str, r, st) → (¬ is_referencevalue(st[r -- mkfs(((* str2)) .class, mkclasstype(((* str0)) .class), ((* str1)) .field) ']) ↔ false)
Proof step 3:
⊦ is_obj(str, r, st) ↔ class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st)

Rule argument

[crewrite-arg: is_obj-no-refval-02 , F , [str2, str0, str1, st, r, str] → [str2, str0, str1, st, r, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_referencevalue(val) → val .refval = jvmref])], [EXTRATERMS : (str2, str0, str1, st, r, str)]]