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<p>as <a href="page.php?w=model_checker">model checker</a>s, which determine if a given artifact possesses <a href="page.php?w=Safety_and_Liveness_Properties">safety or liveness properties</a>. For example, CTL can specify that when some <a href="page.php?w=initial_condition">initial condition</a> is satisfied (e.g., all program variables are positive or no cars on a highway straddle two lanes), then all possible executions of a program avoid some undesirable condition (e.g., dividing a number by zero or two cars colliding on a highway). In this</p><p>
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