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Proof step 13 from proof nopathex-badclassfield (previous step)

st[r0 -- _type] .type = mkclasstype(class), type∃(str, st[r -- _type] .type), path∃(str, r, r0, st), fs ' ∈ instfields(class), contains(str, st[r -- _type] .type ' + tys + mkclasstype(class) '), interface∃(str, class), is_valid_ref(str, r0, st) ⊦ r = r0, r0 = jvmref, fs ' = _type

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[speclemmaarg: ,is_valid_ref(str, r, st) ↔ is_obj(str, r, st) ∨ is_array(str, r, st) ,[st, r, str] → [st, r0, str] ,F ,addfuns , ,is-valid-ref-stronger-def ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ st[r -- _type] .type = mkclasstype(class) → ¬ is_array(str, r, st)], [CSIMPSEQ : ⊦ is_obj(str, r, st) ∧ st[r -- _type] .type = mkclasstype(class) → ¬ interface∃(str, class)])], [EXTRATERMS : (st, r0, str)]]