4 n2 [ shape=octagon, label="c", color="black", fontcolor="black" ];
5 n3 [ shape=octagon, label="prod", color="black", fontcolor="black" ];
6 c7 [ shape=record, label="{{<p4> A|<p5> B}|$4\n$mul|{<p6> Y}}" ];
7 n1 [ shape=diamond, label="$3_Y" ];
8 n1:e -> c7:p4:w [color="black", style="setlinewidth(3)", label=""];
9 n2:e -> c7:p5:w [color="black", style="setlinewidth(3)", label=""];
10 c7:p6:e -> n3:w [color="black", style="setlinewidth(3)", label=""];