写了个自定义计分脚本，如下：

@timemax = 0;
if @time4 > @timemax;then
    @timemax = @time4;
fi
if @time5 > @timemax;then
    @timemax = @time5;
fi
if @time6 > @timemax;then
    @timemax = @time6;
fi
@memorymax = 0;
if @memory4 > @memorymax;then
    @memorymax = @memory4;
fi
if @memory5 > @timemax;then
    @memorymax = @memory5;
fi
if @memory6 > @timemax;then
    @memorymax = @memory6;
fi

if not(@status5 == AC) or not(@status6 == AC) or not(@status4 == AC);then
    @total_score = 0 ;
    @final_status = UNAC;
    @final_time = @timemax;
    @final_memory = @memorymax;
else
    if @memorymax > 8000000;then
        @total_score = 12 ;
        @final_status = UNAC;
        @final_time = @timemax;
        @final_memory = @memorymax;
    else
        @total_score = 30;
        @final_status = AC;
        @final_time = @timemax;
        @final_memory = @memorymax;
    fi
fi

结果提交后如果内存不到 $\tt8 MB$ 时表现正常，而在大于 $\tt8 MB$ 时表现为 $\color{#0E1D69}\tt UKE$。提示信息如下：

Unknown Error.
Received signal 11: Segmentation fault with invalid memory reference.

请万能的谷民们瞧瞧，我这个问题出在哪？