Sémantique Axiomatique ou Logique de Hoare - Ensiie
Sémantique Axiomatique ou Logique de Hoare - Ensiie
Sémantique Axiomatique ou Logique de Hoare - Ensiie
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{P}i{Q ′ } Q ′ ⇒ Q<br />
(consD)<br />
{P}i{Q}<br />
It is safe to weaken a post-condition so it says less. This rule allows for<br />
weakening post-conditions<br />
An instance :<br />
{x > 2}x := x + 1{x > 3} (x > 3) ⇒ (x > 1)<br />
{x > 2}x := x + 1{x > 1}<br />
(ENSIIE) <strong>Hoare</strong> 23 / 52
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