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Proof step 10 from proof is_valid_ref-addobj-01 (previous step)

is_obj(r, addobj(r, class, fis, st)), class+∃(str, class) ⊦ _type ∈ fis, is_obj(str, r, addobj(r, class, fis, st)), is_abstract(class)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ is_obj(str, r, st) ↔ class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st)
Proof step 9:
¬ _type ∈ fis ⊦ (addobj(r, class1, fis, st)[r -- _type]) = typeval(mkclasstype(class1))

Rule argument

[crewrite-arg: is-real-object-def , F , [st, r, str] → [addobj(r, class, fis, st), r, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ typeval(ty) .type = ty], [CSIMPSEQ : ⊦ mkclasstype(class) .class = class])], [EXTRATERMS : (addobj(r, class, fis, st), r, str)]]