Program: 3149
Project: 3149
Buggy source:
private String format(INDArray arr,int offset,boolean summarize){
  int rank=arr.rank();
  if (arr.isScalar() && rank == 0) {
    if (arr instanceof IComplexNDArray) {
      return ((IComplexNDArray)arr).getComplex(0).toString();
    }
    double arrElement=arr.getDouble(0);
    if (!dontOverrideFormat && ((Math.abs(arrElement) < this.minToPrintWithoutSwitching && arrElement != 0) || (Math.abs(arrElement) >= this.maxToPrintWithoutSwitching))) {
      String asString=new DecimalFormat(scientificFormat).format(arrElement);
      asString=asString.replace('E','e');
      return asString;
    }
 else {
      if (arr.getDouble(0) == 0)       return "String_Node_Str";
      return decimalFormat.format(arr.getDouble(0));
    }
  }
 else   if (rank == 1) {
    return vectorToString(arr,summarize);
  }
 else   if (arr.isRowVector()) {
    if (offset == 0) {
      StringBuilder sb=new StringBuilder();
      sb.append("String_Node_Str");
      sb.append(vectorToString(arr,summarize));
      sb.append("String_Node_Str");
      return sb.toString();
    }
    return vectorToString(arr,summarize);
  }
 else {
    offset++;
    StringBuilder sb=new StringBuilder();
    sb.append("String_Node_Str");
    for (int i=0; i < arr.slices(); i++) {
      if (summarize && i > 2 && i < arr.slices() - 3) {
        if (i == 3) {
          sb.append("String_Node_Str");
          sb.append(newLineSep + "String_Node_Str");
          sb.append(StringUtils.repeat("String_Node_Str",rank - 2));
          sb.append(StringUtils.repeat("String_Node_Str",offset));
        }
      }
 else {
        if (arr.rank() == 3 && arr.slice(i).isRowVector())         sb.append("String_Node_Str");
        if (arr.ordering() == 'f' && arr.rank() > 2 && arr.size(arr.rank() - 1) == 1) {
          sb.append(format(arr.dup('c').slice(i),offset,summarize));
        }
 else {
          sb.append(format(arr.slice(i),offset,summarize));
        }
        if (i != arr.slices() - 1) {
          if (arr.rank() == 3 && arr.slice(i).isRowVector())           sb.append("String_Node_Str");
          sb.append(newLineSep + "String_Node_Str");
          sb.append(StringUtils.repeat("String_Node_Str",rank - 2));
          sb.append(StringUtils.repeat("String_Node_Str",offset));
        }
 else {
          if (arr.rank() == 3 && arr.slice(i).isRowVector())           sb.append("String_Node_Str");
        }
      }
    }
    sb.append("String_Node_Str");
    return sb.toString();
  }
}

Fixed version (ground truth):
private String format(INDArray arr,int offset,boolean summarize){
  int rank=arr.rank();
  if (arr.isScalar() && rank == 0) {
    if (arr instanceof IComplexNDArray) {
      return ((IComplexNDArray)arr).getComplex(0).toString();
    }
    double arrElement=arr.getDouble(0);
    if (!dontOverrideFormat && ((Math.abs(arrElement) < this.minToPrintWithoutSwitching && arrElement != 0) || (Math.abs(arrElement) >= this.maxToPrintWithoutSwitching))) {
      String asString=new DecimalFormat(scientificFormat).format(arrElement);
      asString=asString.replace('E','e');
      return asString;
    }
 else {
      if (arr.getDouble(0) == 0)       return "String_Node_Str";
      return decimalFormat.format(arr.getDouble(0));
    }
  }
 else   if (rank == 1) {
    return vectorToString(arr,summarize);
  }
 else   if (arr.isRowVector()) {
    if (offset == 0) {
      StringBuilder sb=new StringBuilder();
      sb.append("String_Node_Str");
      sb.append(vectorToString(arr,summarize));
      sb.append("String_Node_Str");
      return sb.toString();
    }
    return vectorToString(arr,summarize);
  }
 else {
    offset++;
    StringBuilder sb=new StringBuilder();
    sb.append("String_Node_Str");
    for (int i=0; i < arr.slices(); i++) {
      if (summarize && i > 2 && i < arr.slices() - 3) {
        if (i == 3) {
          sb.append("String_Node_Str");
          sb.append(newLineSep + "String_Node_Str");
          sb.append(StringUtils.repeat("String_Node_Str",rank - 2));
          sb.append(StringUtils.repeat("String_Node_Str",offset));
        }
      }
 else {
        if (arr.rank() == 3 && arr.slice(i).isRowVector())         sb.append("String_Node_Str");
        if (arr.ordering() == 'f' && arr.rank() > 2 && arr.size(arr.rank() - 1) == 1) {
          sb.append(format(arr.dup('c').slice(i),offset,summarize));
        }
 else         if (arr.rank() <= 1) {
          sb.append(format(Nd4j.scalar(arr.getDouble(0)),offset,summarize));
        }
 else {
          sb.append(format(arr.slice(i),offset,summarize));
        }
        if (i != arr.slices() - 1) {
          if (arr.rank() == 3 && arr.slice(i).isRowVector())           sb.append("String_Node_Str");
          sb.append(newLineSep + "String_Node_Str");
          sb.append(StringUtils.repeat("String_Node_Str",rank - 2));
          sb.append(StringUtils.repeat("String_Node_Str",offset));
        }
 else {
          if (arr.rank() == 3 && arr.slice(i).isRowVector())           sb.append("String_Node_Str");
        }
      }
    }
    sb.append("String_Node_Str");
    return sb.toString();
  }
}