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Proof step 2 from proof exception-02 (conclusion)

⊦ exception(class, st) → st[_mode] ≠ noval

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ exception(class1, st) ↔ is_throw_mode(st[_mode]) ∧ st[_mode] .type = mkclasstype(class1)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_throw_mode(noval)])]]