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Proof step 18 from proof superClass-diff (conclusion)

⊦ is_predefined_class(class) ∧ class ≠ `java.lang.Object' .class → predef_superClass(class) ≠ class

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ is_predefined_class(class) ∧ class ≠ `java.lang.Object' .class → predef_superClass(class) = predef_supers(class) .rest .first
Proof step 17:
predef_supers(class) .rest .first = class, is_predefined_class(class) ⊦ class = `java.lang.Object' .class

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]