op</code></p></dd></dl><dl><dt class="spec value" id="val-is_known_zero"><a href="#val-is_known_zero" class="anchor"></a><code><span class="keyword">val</span> is_known_zero : <a href="../Pulselib/PulseAbductiveDomain/index.html#type-t">AbductiveDomain.t</a> <span>&#45;&gt;</span> <a href="../Pulselib/PulseAbstractValue/index.html#type-t">Pulselib.PulseBasicInterface.AbstractValue.t</a> <span>&#45;&gt;</span> bool</code></dt><dt class="spec value" id="val-is_unsat_cheap"><a href="#val-is_unsat_cheap" class=