Program: 62136
Project: 62136
Buggy source:
@Override protected List<GraphPart> checkPrecoNextParts(GraphPart part){
  List<GraphSourceItem> items=getPartItems(part);
  part=makeMultiPart(part);
  if (!items.isEmpty()) {
    if (items.get(items.size() - 1) instanceof ActionIf) {
      if (items.get(items.size() - 2) instanceof ActionStrictEquals) {
        List<Integer> storeRegisters=new ArrayList<>();
        for (        GraphSourceItem s : items) {
          if (s instanceof ActionStoreRegister) {
            ActionStoreRegister sr=(ActionStoreRegister)s;
            storeRegisters.add(sr.registerNumber);
          }
        }
        if (!storeRegisters.isEmpty()) {
          List<GraphPart> caseBodies=new ArrayList<>();
          boolean proceed=false;
          do {
            proceed=false;
            caseBodies.add(part.nextParts.get(0));
            part=part.nextParts.get(1);
            items=getPartItems(part);
            part=makeMultiPart(part);
            if (!items.isEmpty()) {
              if (items.get(0) instanceof ActionPush) {
                ActionPush pu=(ActionPush)items.get(0);
                if (!pu.values.isEmpty()) {
                  if (pu.values.get(0) instanceof RegisterNumber) {
                    RegisterNumber rn=(RegisterNumber)pu.values.get(0);
                    if (storeRegisters.contains(rn.number)) {
                      storeRegisters.clear();
                      storeRegisters.add(rn.number);
                      if (items.get(items.size() - 1) instanceof ActionIf) {
                        if (items.size() > 1) {
                          if (items.get(items.size() - 2) instanceof ActionStrictEquals) {
                            proceed=true;
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
 while (proceed);
          if (caseBodies.size() > 1) {
            caseBodies.add(part);
            return caseBodies;
          }
        }
      }
    }
  }
  return null;
}

Fixed version (ground truth):
@Override protected List<GraphPart> checkPrecoNextParts(GraphPart part){
  List<GraphSourceItem> items=getPartItems(part);
  part=makeMultiPart(part);
  if (items.size() > 1) {
    if (items.get(items.size() - 1) instanceof ActionIf) {
      if (items.get(items.size() - 2) instanceof ActionStrictEquals) {
        List<Integer> storeRegisters=new ArrayList<>();
        for (        GraphSourceItem s : items) {
          if (s instanceof ActionStoreRegister) {
            ActionStoreRegister sr=(ActionStoreRegister)s;
            storeRegisters.add(sr.registerNumber);
          }
        }
        if (!storeRegisters.isEmpty()) {
          List<GraphPart> caseBodies=new ArrayList<>();
          boolean proceed=false;
          do {
            proceed=false;
            caseBodies.add(part.nextParts.get(0));
            part=part.nextParts.get(1);
            items=getPartItems(part);
            part=makeMultiPart(part);
            if (!items.isEmpty()) {
              if (items.get(0) instanceof ActionPush) {
                ActionPush pu=(ActionPush)items.get(0);
                if (!pu.values.isEmpty()) {
                  if (pu.values.get(0) instanceof RegisterNumber) {
                    RegisterNumber rn=(RegisterNumber)pu.values.get(0);
                    if (storeRegisters.contains(rn.number)) {
                      storeRegisters.clear();
                      storeRegisters.add(rn.number);
                      if (items.get(items.size() - 1) instanceof ActionIf) {
                        if (items.size() > 1) {
                          if (items.get(items.size() - 2) instanceof ActionStrictEquals) {
                            proceed=true;
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
 while (proceed);
          if (caseBodies.size() > 1) {
            caseBodies.add(part);
            return caseBodies;
          }
        }
      }
    }
  }
  return null;
}