Program: 178480
Project: 178480
Buggy source:
public void execute(Tree root){
  Tree tree=root;
  for (int i=0; i < path.length - 1; i++) {
    tree=tree.getChild(path[i]);
  }
  if (!splitLeft) {
    if (!splitRight) {
      if (!addStyle) {
        tree.setAttribute(param,value);
      }
 else {
        Tree tc=tree.removeChild(path[path.length - 1]);
        Tree ts=TreeFactory.createElementTree("String_Node_Str");
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1]);
        if (tc.isInvisible()) {
          ts.hide();
        }
      }
    }
 else {
      if (!addStyle) {
        String text=tree.getChild(path[path.length - 1]).split(end);
        Tree tc=TreeFactory.createTextTree(text);
        Tree ts=tree.cloneNode();
        tree.setAttribute(param,value);
        ts.addChild(tc);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        if (tree.isInvisible()) {
          ts.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(end));
        Tree ts=TreeFactory.createElementTree("String_Node_Str");
        ts.setAttribute(param,value);
        ts.addChild(tree.removeChild(path[path.length - 1]));
        tree.addChild(tc,path[path.length - 1]);
        tree.addChild(ts,path[path.length - 1]);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
        }
      }
    }
  }
 else {
    if (!splitRight) {
      if (!addStyle) {
        Tree tc=TreeFactory.createTextTree(tree.getChild(path[path.length - 1]).split(start));
        Tree ts=tree.cloneNode();
        ts.setAttribute(param,value);
        ts.addChild(tc);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        if (tree.isInvisible()) {
          ts.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(start));
        Tree ts=TreeFactory.createElementTree("String_Node_Str");
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1] + 1);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
        }
      }
    }
 else {
      if (!addStyle) {
        Tree tc=TreeFactory.createTextTree(tree.getChild(path[path.length - 1]).split(start));
        Tree tc2=TreeFactory.createTextTree(tc.split(end - start));
        Tree ts=tree.cloneNode();
        Tree ts2=tree.cloneNode();
        ts.setAttribute(param,value);
        ts.addChild(tc);
        ts2.addChild(tc2);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        parent.addChild(ts2,path[path.length - 2] + 2);
        if (tree.isInvisible()) {
          ts.hide();
          ts2.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(start));
        Tree tc2=TreeFactory.createTextTree(tc.split(end - start));
        Tree ts=TreeFactory.createElementTree("String_Node_Str");
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1] + 1);
        tree.addChild(tc2,path[path.length - 1] + 2);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
          tc2.hide();
        }
      }
    }
  }
}

Fixed version (ground truth):
public void execute(Tree root){
  Tree tree=root;
  for (int i=0; i < path.length - 1; i++) {
    tree=tree.getChild(path[i]);
  }
  if (!splitLeft) {
    if (!splitRight) {
      if (!addStyle) {
        tree.setAttribute(param,value);
      }
 else {
        Tree tc=tree.removeChild(path[path.length - 1]);
        Tree ts=TreeFactory.createElementTree(SPAN);
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1]);
        if (tc.isInvisible()) {
          ts.hide();
        }
      }
    }
 else {
      if (!addStyle) {
        String text=tree.getChild(path[path.length - 1]).split(end);
        Tree tc=TreeFactory.createTextTree(text);
        Tree ts=tree.cloneNode();
        tree.setAttribute(param,value);
        ts.addChild(tc);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        if (tree.isInvisible()) {
          ts.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(end));
        Tree ts=TreeFactory.createElementTree(SPAN);
        ts.setAttribute(param,value);
        ts.addChild(tree.removeChild(path[path.length - 1]));
        tree.addChild(tc,path[path.length - 1]);
        tree.addChild(ts,path[path.length - 1]);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
        }
      }
    }
  }
 else {
    if (!splitRight) {
      if (!addStyle) {
        Tree tc=TreeFactory.createTextTree(tree.getChild(path[path.length - 1]).split(start));
        Tree ts=tree.cloneNode();
        ts.setAttribute(param,value);
        ts.addChild(tc);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        if (tree.isInvisible()) {
          ts.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(start));
        Tree ts=TreeFactory.createElementTree(SPAN);
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1] + 1);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
        }
      }
    }
 else {
      if (!addStyle) {
        Tree tc=TreeFactory.createTextTree(tree.getChild(path[path.length - 1]).split(start));
        Tree tc2=TreeFactory.createTextTree(tc.split(end - start));
        Tree ts=tree.cloneNode();
        Tree ts2=tree.cloneNode();
        ts.setAttribute(param,value);
        ts.addChild(tc);
        ts2.addChild(tc2);
        Tree parent=tree.getParent();
        parent.addChild(ts,path[path.length - 2] + 1);
        parent.addChild(ts2,path[path.length - 2] + 2);
        if (tree.isInvisible()) {
          ts.hide();
          ts2.hide();
        }
      }
 else {
        Tree t=tree.getChild(path[path.length - 1]);
        Tree tc=TreeFactory.createTextTree(t.split(start));
        Tree tc2=TreeFactory.createTextTree(tc.split(end - start));
        Tree ts=TreeFactory.createElementTree(SPAN);
        ts.setAttribute(param,value);
        ts.addChild(tc);
        tree.addChild(ts,path[path.length - 1] + 1);
        tree.addChild(tc2,path[path.length - 1] + 2);
        if (t.isInvisible()) {
          tc.hide();
          ts.hide();
          tc2.hide();
        }
      }
    }
  }
}