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VERIFY is an interactive verifier for Pascal programs.   It accepts as
input Pascal programs containing assertions about what the program is
supposed to do and tries to verify that the program is consistent with
these assertions.   The verifier can do some simplifications on its own
(over the integers and the propositional calculus), and also understands
the basic properties of arrays, pointers, functions, procedures, etc.
The usercan augment the proof capabilities of the verifier by giving
it additional replacement rules (e.g. REPLACE F(X) BY G(X) ) and
rules of inference (e.g. INFER P(X) FROM Q(X) ∧ R(X) ).

The system is presently being completely reprogrammed.   The stable
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