digraph G {
  344 [label = "CONV_TAC"];
  345 [label = "GEN_TAC"];
  351 [label = "INDUCT_TAC"];
  352 [label = "REWRITE_TAC"];
  358 [label = "REAL_ARITH_TAC"];
  353 [label = "REWRITE_TAC"];
  367 [label = "REWRITE_TAC"];
  368 [label = "SIMP_TAC"];
  370 [label = "REWRITE_TAC"];
  372 [label = "REWRITE_TAC"];
  374 [label = "ASM_REWRITE_TAC"];
  376 [label = "REWRITE_TAC"];
  378 [label = "REAL_ARITH_TAC"];
  344 -> 345;
  345 -> 351;
  subgraph cluster1 {
    label = "induction";
    351 -> 352;
    351 -> 353;
    352 -> 358;
    subgraph cluster2 {
      label = "base case";
      358;
    }
    353 -> 367;
    subgraph cluster3 {
      label = "step case";
      367 -> 368;
      368 -> 370;
      370 -> 372;
      372 -> 374;
      374 -> 376;
      376 -> 378;
    }
  }
}