Abstract
The first step in loop development is to choose invariant P and guard B from postcondition R to satisfy
If R happens to be a conjunction, then this is easy. Choose for P one of the conjuncts, and choose for B the negation of the other conjunct, as we have seen.
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© 1990 Springer-Verlag New York Inc.
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Cohen, E. (1990). Loops B — On replacing constants by fresh variables. In: Programming in the 1990s. Texts and Monographs in Computer Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9706-9_11
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DOI: https://doi.org/10.1007/978-1-4613-9706-9_11
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