digraph CFG {
  node [fontname="Helvetica"];
  n32 [label="3", shape=box];
  n32 -> n33;
  n33 [label="CALL f(3)", shape=box, style=filled, color=orange];
  n33 -> n4;
  n4 [label="START f(x)", shape=box, style=filled, color=green];
  n4 -> n6;
  n6 [label="2", shape=box];
  n6 -> n7;
  n7 [label="x", shape=box];
  n7 -> n8;
  n8 [label="(2 * x)", shape=box];
  n8 -> n9;
  n9 [label="x = (2 * x)", shape=box];
  n9 -> n10;
  n10 [label="x", shape=box];
  n10 -> n11;
  n11 [label="0", shape=box];
  n11 -> n12;
  n12 [label="(x > 0)", shape=box];
  n12 -> n13;
  n13 [label="<>", shape=diamond];
  n13 -> n17 [label="T"];
  n17 [label="x", shape=box];
  n17 -> n18;
  n18 [label="1", shape=box];
  n18 -> n19;
  n19 [label="(x - 1)", shape=box];
  n19 -> n20;
  n20 [label="x = (x - 1)", shape=box];
  n20 -> n22;
  n22 [label="x", shape=box];
  n22 -> n23;
  n23 [label="0", shape=box];
  n23 -> n24;
  n24 [label="(x > 0)", shape=box];
  n24 -> n25;
  n25 [label="<>", shape=diamond];
  n25 -> n27 [label="T"];
  n27 [label="x", shape=box];
  n27 -> n28;
  n28 [label="1", shape=box];
  n28 -> n29;
  n29 [label="(x - 1)", shape=box];
  n29 -> n30;
  n30 [label="x = (x - 1)", shape=box];
  n30 -> n22;
  n25 -> n5 [label="F"];
  n5 [label="END f(x)", shape=box, style=filled, color=green];
  n5 -> n35;
  n35 [label="RET f(3)", shape=box, style=filled, color=orange];
  n13 -> n21 [label="F"];
  n21 [label="x", shape=box];
  n21 -> n22;
  n33 -> n35;
}