Program: 88790
Project: 88790
Buggy source:
public void load(TableFactory tf,TableMaps toload){
  Set<TableId> old=tfs.get(tf);
  if (toload.tfs.get(tf) != null) {
    tfs.put(tf,toload.tfs.get(tf));
  }
 else {
    tfs.remove(tf);
  }
  if (tfs.containsKey(tf)) {
    for (    TableId id : tfs.get(tf)) {
      qf.removeQueries(id);
      if (old != null && old.contains(id)) {
        if (toload.whitelist.containsKey(id)) {
          if (this.whitelist.containsKey(id)) {
            log.info(String.format("String_Node_Str",id));
          }
 else {
            log.info(String.format("String_Node_Str",id));
            this.blacklist.remove(id);
          }
          this.whitelist.put(id,toload.whitelist.get(id));
        }
 else {
          if (this.blacklist.containsKey(id)) {
            log.info(String.format("String_Node_Str",id));
          }
 else {
            log.warn(String.format("String_Node_Str",id));
            this.whitelist.remove(id);
          }
          this.blacklist.put(id,toload.blacklist.get(id));
        }
      }
 else {
        if (toload.whitelist.containsKey(id)) {
          this.whitelist.put(id,toload.whitelist.get(id));
          log.info(String.format("String_Node_Str",id));
        }
 else {
          this.blacklist.put(id,toload.blacklist.get(id));
          log.warn(String.format("String_Node_Str",id));
        }
      }
    }
  }
  if (old != null) {
    for (    TableId id : old) {
      if (!tfs.containsKey(tf) || !tfs.get(tf).contains(id)) {
        qf.removeQueries(id);
        if (this.whitelist.remove(id) != null) {
          log.warn(String.format("String_Node_Str",id));
        }
 else {
          this.blacklist.remove(id);
          log.warn(String.format("String_Node_Str",id));
        }
      }
    }
  }
}

Fixed version (ground truth):
public void load(TableFactory tf,TableMaps toload){
  Set<TableId> old=tfs.get(tf);
  if (toload.tfs.get(tf) != null) {
    tfs.put(tf,toload.tfs.get(tf));
  }
 else {
    tfs.remove(tf);
  }
  if (tfs.containsKey(tf)) {
    for (    TableId id : tfs.get(tf)) {
      if (old != null) {
        for (        TableId oldid : old) {
          if (oldid.equals(id) && tables.whitelist.containsKey(oldid)) {
            ServerTable oldTable=tables.whitelist.get(oldid);
            ServerTable st=toload.whitelist.get(oldid);
            if (st.isSame(oldTable)) {
              break;
            }
 else {
              qf.removeQueries(id);
            }
          }
        }
      }
 else {
        qf.removeQueries(id);
      }
      if (old != null && old.contains(id)) {
        if (toload.whitelist.containsKey(id)) {
          if (this.whitelist.containsKey(id)) {
            log.info(String.format("String_Node_Str",id));
          }
 else {
            log.info(String.format("String_Node_Str",id));
            this.blacklist.remove(id);
          }
          this.whitelist.put(id,toload.whitelist.get(id));
        }
 else {
          if (this.blacklist.containsKey(id)) {
            log.info(String.format("String_Node_Str",id));
          }
 else {
            log.warn(String.format("String_Node_Str",id));
            this.whitelist.remove(id);
          }
          this.blacklist.put(id,toload.blacklist.get(id));
        }
      }
 else {
        if (toload.whitelist.containsKey(id)) {
          this.whitelist.put(id,toload.whitelist.get(id));
          log.info(String.format("String_Node_Str",id));
        }
 else {
          this.blacklist.put(id,toload.blacklist.get(id));
          log.warn(String.format("String_Node_Str",id));
        }
      }
    }
  }
  if (old != null) {
    for (    TableId id : old) {
      if (!tfs.containsKey(tf) || !tfs.get(tf).contains(id)) {
        qf.removeQueries(id);
        if (this.whitelist.remove(id) != null) {
          log.warn(String.format("String_Node_Str",id));
        }
 else {
          this.blacklist.remove(id);
          log.warn(String.format("String_Node_Str",id));
        }
      }
    }
  }
}