>exec_instr</code> defines how executing an instruction from a given abstract state changes that state into a new one. This is usually called the <i>transfer function</i> in Abstract Interpretation terms. <code>node</code> is the node containing the current instruction.</p></dd></dl><dl><dt class="spec value" id="val-pp_session_name"><a href="#val-pp_session_name" class="anchor"></a><code><span class="keyword">val</span> pp_session_name : <a href="CFG/Node/index.html#type-t">CFG.Node.t</a> <span>&#45;&gt;</