lec31c-HoareLogicProgramVarsAndLogicalVars.pdf

lec31c-HoareLogicProgramVarsAndLogicalVars.pdf

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BITS Pilani Pilani Campus MODULE: PROGRAM VERIFICATION Floyd-Hoare Logic: Program Variables and Logical Variables Sundar B. CS&IS, BITS Pilani 0 20-11-2016 CS/IS F214 Logic in Computer Science
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Hoare Logic Program Variables and Logical Variables /* Precondition: x >=0 y >= 0 */ while (y != 0) { t = x % y; x = y; y = t; } /* Poscondition: x = gcd(x, y) */ 20-11-2016 1 Sundar B. CS&IS, BITS Pilani Consider the following program intended to compute the gcd of x and y: What is wrong with this postcondition?
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