Program: 88533
Project: 88533
Buggy source:
protected static EStructuralFeatureOverride getOwnerEStructuralFeatureOverride(BiFunction<String,Project,Element> idToElementConverter){
  return new EStructuralFeatureOverride((objectNode,eStructuralFeature,project,strict,element) -> UMLPackage.Literals.ELEMENT__OWNER == eStructuralFeature,(objectNode,eStructuralFeature,project,strict,element) -> {
    if (element instanceof Model || element instanceof ValueSpecification) {
      return element;
    }
    JsonNode jsonNode=objectNode.get(MDKConstants.OWNER_ID_KEY);
    if (jsonNode == null || !jsonNode.isTextual()) {
      if (strict) {
        throw new ImportException(element,objectNode,"String_Node_Str");
      }
      return null;
    }
    if (element instanceof Package && (jsonNode=objectNode.get(MDKConstants.ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().startsWith("String_Node_Str") && (jsonNode=objectNode.get(MDKConstants.OWNER_ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().equals(Converters.getIProjectToIdConverter().apply(project.getPrimaryProject()))) {
      ((Package)element).setOwningPackage(project.getPrimaryModel());
      return element;
    }
    Element owningElement=idToElementConverter.apply(jsonNode.asText(),project);
    if (owningElement == null) {
      if (strict) {
        JsonNode sysmlIdNode=objectNode.get(MDKConstants.ID_KEY);
        throw new ImportException(element,objectNode,"String_Node_Str" + (sysmlIdNode != null && sysmlIdNode.isTextual() ? sysmlIdNode.asText("String_Node_Str") : "String_Node_Str") + "String_Node_Str"+ jsonNode+ "String_Node_Str");
      }
    }
    try {
      if (element instanceof PackageableElement && owningElement instanceof Package) {
        ((PackageableElement)element).setOwningPackage((Package)owningElement);
      }
 else       if (element instanceof ParameterableElement && owningElement instanceof TemplateParameter) {
        ((ParameterableElement)element).setOwningTemplateParameter((TemplateParameter)owningElement);
      }
 else       if (element instanceof Slot && owningElement instanceof InstanceSpecification) {
        ((Slot)element).setOwningInstance((InstanceSpecification)owningElement);
      }
 else       if (element instanceof InstanceSpecification && ((jsonNode=objectNode.get(KEY_FUNCTION.apply(UMLPackage.Literals.INSTANCE_SPECIFICATION__STEREOTYPED_ELEMENT))) != null && jsonNode.isTextual() || (jsonNode=objectNode.get(MDKConstants.ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().endsWith(MDKConstants.APPLIED_STEREOTYPE_INSTANCE_ID_SUFFIX))) {
        ((InstanceSpecification)element).setStereotypedElement(owningElement);
      }
 else {
        element.setOwner(owningElement);
      }
    }
 catch (    IllegalArgumentException e) {
      System.out.println("String_Node_Str" + element + (element != null ? "String_Node_Str" + Converters.getElementToIdConverter().apply(element) : "String_Node_Str"));
      System.out.println("String_Node_Str" + owningElement + (owningElement != null ? "String_Node_Str" + Converters.getElementToIdConverter().apply(owningElement) : "String_Node_Str"));
      throw new ImportException(element,objectNode,"String_Node_Str",e);
    }
    return element;
  }
);
}

Fixed version (ground truth):
protected static EStructuralFeatureOverride getOwnerEStructuralFeatureOverride(BiFunction<String,Project,Element> idToElementConverter){
  return new EStructuralFeatureOverride((objectNode,eStructuralFeature,project,strict,element) -> UMLPackage.Literals.ELEMENT__OWNER == eStructuralFeature,(objectNode,eStructuralFeature,project,strict,element) -> {
    if (element instanceof Model || element instanceof ValueSpecification) {
      return element;
    }
    JsonNode jsonNode=objectNode.get(MDKConstants.OWNER_ID_KEY);
    if (jsonNode == null || !jsonNode.isTextual()) {
      if (strict) {
        throw new ImportException(element,objectNode,"String_Node_Str");
      }
      return null;
    }
    if (element instanceof Package && (jsonNode=objectNode.get(MDKConstants.ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().startsWith(MDKConstants.HOLDING_BIN_ID_PREFIX) && (jsonNode=objectNode.get(MDKConstants.OWNER_ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().equals(Converters.getIProjectToIdConverter().apply(project.getPrimaryProject()))) {
      ((Package)element).setOwningPackage(project.getPrimaryModel());
      return element;
    }
    Element owningElement=idToElementConverter.apply(jsonNode.asText(),project);
    if (owningElement == null) {
      if (strict) {
        JsonNode sysmlIdNode=objectNode.get(MDKConstants.ID_KEY);
        throw new ImportException(element,objectNode,"String_Node_Str" + (sysmlIdNode != null && sysmlIdNode.isTextual() ? sysmlIdNode.asText("String_Node_Str") : "String_Node_Str") + "String_Node_Str"+ jsonNode+ "String_Node_Str");
      }
    }
    try {
      if (element instanceof PackageableElement && owningElement instanceof Package) {
        ((PackageableElement)element).setOwningPackage((Package)owningElement);
      }
 else       if (element instanceof ParameterableElement && owningElement instanceof TemplateParameter) {
        ((ParameterableElement)element).setOwningTemplateParameter((TemplateParameter)owningElement);
      }
 else       if (element instanceof Slot && owningElement instanceof InstanceSpecification) {
        ((Slot)element).setOwningInstance((InstanceSpecification)owningElement);
      }
 else       if (element instanceof InstanceSpecification && ((jsonNode=objectNode.get(KEY_FUNCTION.apply(UMLPackage.Literals.INSTANCE_SPECIFICATION__STEREOTYPED_ELEMENT))) != null && jsonNode.isTextual() || (jsonNode=objectNode.get(MDKConstants.ID_KEY)) != null && jsonNode.isTextual() && jsonNode.asText().endsWith(MDKConstants.APPLIED_STEREOTYPE_INSTANCE_ID_SUFFIX))) {
        ((InstanceSpecification)element).setStereotypedElement(owningElement);
      }
 else {
        element.setOwner(owningElement);
      }
    }
 catch (    IllegalArgumentException e) {
      System.out.println("String_Node_Str" + element + (element != null ? "String_Node_Str" + Converters.getElementToIdConverter().apply(element) : "String_Node_Str"));
      System.out.println("String_Node_Str" + owningElement + (owningElement != null ? "String_Node_Str" + Converters.getElementToIdConverter().apply(owningElement) : "String_Node_Str"));
      throw new ImportException(element,objectNode,"String_Node_Str",e);
    }
    return element;
  }
);
}