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Proof step 30 from proof contains-objectarray (previous step)

ty = mkarraytype(ty1), ty1 .jtelemtype = mkclasstype(`java.lang.Object' .class), type∃(str, ty0), is_arraytype(ty), is_classtype(ty0) ∨ is_arraytype(ty0) ⊦ contains(str, mkclasstype(`java.lang.Object' .class), ty0), contains(str, ty, ty0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 29:
ty1 .jtelemtype = mkclasstype(`java.lang.Object' .class), type∃(str, ty0), is_classtype(ty0) ∨ is_arraytype(ty0) ⊦ contains(str, mkclasstype(`java.lang.Object' .class), ty0), contains(str, mkarraytype(ty1), ty0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_arraytype(mkarraytype(ty))])]]