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Proof step 117 from proof contains-subspec-better (previous step)

type∃(str0, ty), type∃(str, ty0), type∃(str0, ty3), type∃(str, ty3), contains(str0, ty, ty0), type∃(str0, ty0), has_classtype(ty), same-subclasses-contains(ty .jtelemtype .class, str, str0), type∃(str, ty), is_reftype(ty), ty1 ≤ ty, type∃(str0, ty1), contains(str0, (ty3 ' + tys1) + ty0 '), is_arraytype(ty1) → ty3 ≤ ty1 .type, is_classtype(ty1) → ¬ interface∃(str0, ty1 .class) ∧ mkfs(class, ty2, fieldvar) ' ∈ instfields(ty1 .class) ∧ ty3 ≤ ty2, ∀ ty0, str0, str, ty, tys0. # tys0 < # (ty3 + tys1) → ( has_classtype(ty) ∧ same-subclasses-contains(ty .jtelemtype .class, str, str0) ∧ type∃(str, ty) ∧ contains(str0, ty ' + tys0 + ty0 ') → contains(str, ty, ty0) ∨ dups(tys0) ∨ ty ∈ tys0) ⊦ ty = ty3, contains(str, ty3, ty0), dups(tys1), ty3 ∈ tys1, ty ∈ tys1, ∃ ty4. ty4 ≤ ty ∧ type∃(str, ty4) ∧ (is_classtype(ty4) → ¬ interface∃(str, ty4 .class) ∧ (∃ fs. fs ' ∈ instfields(ty4 .class) ∧ ty0 ≤ fs .type)) ∧ (is_arraytype(ty4) → ty0 ≤ ty4 .type)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[crewrite-arg: contains-not-hasclasstype-level-01 , F , [str, ty0, ty, str0] → [str0, ty0, ty3, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (str0, ty0, ty3, str)]]