Program: 13042
Project: 13042
Buggy source:
public List<Subnet> getDeviceSubnetsFromActiveInterfaces(){
  List<Subnet> subnets=new ArrayList<>();
  for (  DiscoveredInterface discoveredInterface : interfaceList) {
    String status=discoveredInterface.getParams().get("String_Node_Str");
    if (status.equals("String_Node_Str")) {
      List<DiscoveredIPv4Address> iPv4Addresses=discoveredInterface.getiPv4AddressList();
      for (      DiscoveredIPv4Address iPv4Address : iPv4Addresses) {
        String ipv4Subnet=iPv4Address.getParams().get("String_Node_Str");
        String ipSubnetMask=iPv4Address.getParams().get("String_Node_Str");
        String ipv4SubnetPrefix=iPv4Address.getParams().get("String_Node_Str");
        String subnetName=ipv4Subnet + "String_Node_Str" + ipv4SubnetPrefix;
        String ipv4SubnetBroadcast=iPv4Address.getParams().get("String_Node_Str");
        Subnet subnet=new Subnet(subnetName);
        if (ipv4SubnetPrefix.equals("String_Node_Str") || iPv4Address.isBogon()) {
          continue;
        }
        subnet.setSubnetMask(ipSubnetMask);
        subnet.setSubnetPrefixMask(ipv4SubnetPrefix);
        subnet.setIpAddress(ipv4Subnet);
        subnet.setLocalInterface(discoveredInterface.getName());
        subnet.setSubnetProtocolType("String_Node_Str");
        subnet.setIpv4SubnetBroadcast(ipv4SubnetBroadcast);
        try {
          subnet.setSubnetDiscoveryMethods(discoveredInterface.getDiscoveryMethodsPerSubnet(subnetName,"String_Node_Str"));
        }
 catch (        UnknownHostException e) {
          e.printStackTrace();
        }
        subnets.add(subnet);
      }
    }
  }
  return subnets;
}

Fixed version (ground truth):
public Set<Subnet> getDeviceSubnetsFromActiveInterfaces(){
  Set<Subnet> subnets=new HashSet<>();
  for (  DiscoveredInterface discoveredInterface : interfaceList) {
    String status=discoveredInterface.getParams().get("String_Node_Str");
    if (status.equals("String_Node_Str")) {
      List<DiscoveredIPv4Address> iPv4Addresses=discoveredInterface.getiPv4AddressList();
      for (      DiscoveredIPv4Address iPv4Address : iPv4Addresses) {
        String ipv4Subnet=iPv4Address.getParams().get("String_Node_Str");
        String ipSubnetMask=iPv4Address.getParams().get("String_Node_Str");
        String ipv4SubnetPrefix=iPv4Address.getParams().get("String_Node_Str");
        String subnetName=ipv4Subnet + "String_Node_Str" + ipv4SubnetPrefix;
        String ipv4SubnetBroadcast=iPv4Address.getParams().get("String_Node_Str");
        Subnet subnet=new Subnet(subnetName);
        if (ipv4SubnetPrefix.equals("String_Node_Str") || iPv4Address.isBogon()) {
          continue;
        }
        subnet.setSubnetMask(ipSubnetMask);
        subnet.setSubnetPrefixMask(ipv4SubnetPrefix);
        subnet.setIpAddress(ipv4Subnet);
        subnet.setLocalInterface(discoveredInterface.getName());
        subnet.setSubnetProtocolType("String_Node_Str");
        subnet.setIpv4SubnetBroadcast(ipv4SubnetBroadcast);
        try {
          subnet.setSubnetDiscoveryMethods(discoveredInterface.getDiscoveryMethodsPerSubnet(subnetName,"String_Node_Str"));
        }
 catch (        UnknownHostException e) {
          e.printStackTrace();
        }
        subnets.add(subnet);
      }
    }
  }
  return subnets;
}