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Proof step 8 from proof contains-array (previous step)

tys = ty0 + tys0, contains(str, mkarraytype(ty) ' + tys) ⊦ tys = [], contains(str, ty ' + tys0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
contains(str, mkarraytype(ty) ' + ty0 ' + tys0) ⊦ contains(str, ty ' + tys0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (tys + tys0) + tys1 = tys + tys0 + tys1], [CSIMPSEQ : ⊦ ty ' + tys ≠ []], [CSIMPSEQ : ⊦ ty + tys = ty ' + tys])]]