Buenas estoy tratando de hacer relaciones de muchos de muchos a uno y muchos a muchos pero me sale codigo error 150 les muestro las tablas y los modelos

tabla user:

class CreateUsersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * [@return](https://ed.team/return) void
     */
    public function up(https://)
    {
        Schema::create(https://'users', function (Blueprint $table) {
            $table->id(https://);
            $table->string(https://'name');
            $table->string(https://'email')->unique(https://);
            $table->timestamp(https://'email_verified_at')->nullable(https://);
            $table->string(https://'password');
            $table->rememberToken(https://);
            $table->timestamps(https://);
            $table->integer(https://'id_rol')->unsigned(https://);
            $table->foreign(https://'id_rol')->references(https://'id')->on(https://'rols');
        });
    }
}

Tabla rols, producto y operaciones son los mismos campos pero con diferente nombre. asi que emito sus tablas oslo colocare una para visualizar las tabla

class CreateRolsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * [@return](https://ed.team/return) void
     */
    public function up(https://)
    {
        Schema::create(https://'rols', function (Blueprint $table) {
            $table->id(https://);
            $table->string(https://'name');
            $table->timestamps(https://);
        });
    }
}

Estas es la tabla intermedia donde referencio las tres tablas rol, operaciones y productos

class OperacionesProductoRol extends Migration
{
   /**
    * Run the migrations.
    *
    * [@return](https://ed.team/return) void
    */
   public function up(https://)
   {
       //
       Schema::create(https://'OperacionesProductoRol', function (Blueprint $table){
           $table->id(https://);
           $table->integer(https://'id_rol')->unsigned(https://)->nullable(https://);
           $table->integer(https://'id_operaciones')->unsigned(https://)->nullable(https://);
           $table->integer(https://'id_productos')->unsigned(https://)->nullable(https://);
           $table->foreign(https://'id_rol')->references(https://'id')->on(https://'rols');
           $table->foreign(https://'id_operaciones')->references(https://'id')->on(https://'operaciones');
           $table->foreign(https://'id_productos')->references(https://'id')->on(https://'productos');
       });
   }
}

Modelo user

public function rol(https://){
        return $this->hasOne(https://'App\Rol');
    }
```

Rol :

```php
 public function user(https://){
        return $this->belongsToMany(https://'App\User');
    }
    public function producto(https://){
        return $this->belongsToMany(https://'App\Producto');
    }

    public function operaciones(https://){
        return $this->belongsToMany(https://'App\Operaciones');
    }
```
Producto
```php
public function rol(https://){
        return $this->belongsToMany(https://'App\Roll');
    }

    public function operaciones(https://){
        return $this->belongsToMany(https://'App\Operaciones');
    }
```
Modelo de operaciones
```php
public function producto(https://){
        return $this->belongsToMany(https://'App\Producto');
    }

    public function rol(https://){
        return $this->belongsToMany(https://'App\Rol');
    }
```