使用Alt-Ergo的WP插件 - 无法证明?

时间:2014-01-10 04:15:27

标签: frama-c

我正在尝试使用Alt-Ergo在一个相当复杂的函数上测试WP插件。不幸的是,我无法弄清楚下面给出的“基本”行为有什么问题。

此行为应该为true,因为除了第一个条件语句的else部分之外没有其他地方更新tenumRMode。

奇怪的是,如果我任意评论某些行,我总是从Alt-ergo获得“有效”。

有任何意见吗?

/*@ behavior basic:
      @  assumes fRrValue == 0;
      @  ensures tenumRMode == SS_A_MODE;
      @
    */


[formal_verification]$ frama-c -wp -wp-rte -wp-bhv=basic foo.c -wp-out t  -lib-entry -main foo -wp-model ref -wp-timeout=50 -wp-fct=foo -wp-out t
[kernel] preprocessing with "gcc -C -E -I.  foo.c"
[wp] Running WP plugin...
[rte] annotating function foo
[wp] Collecting axiomatic usage
[wp] Collecting variable usage
[wp] 1 goal scheduled
[wp] [Alt-Ergo] Goal typed_ref_foo_basic_post : Unknown (Qed:20ms)





typedef unsigned char BOOL;
#define TRUE 1
#define FALSE 0

typedef unsigned char uint8;
typedef unsigned short int uint16;
typedef unsigned long  uint32;

uint16 F_MIN_R = 15;

const uint8 RESP_STATE = 30;


typedef enum
{
        RESP_MODE,
        SS_A_MODE
}tenumMode;

tenumMode tenumRMode;


BOOL gbCaMStatus;
BOOL gbCaaStatus;
uint8 mnPb;
BOOL mbApLYRange;
BOOL mbApLRange;
float gfApYLineSlope;
float gfApYLineConst;
float gfApRLineSlope;
float gfApRLineConst;
float mfAp;
uint16 almC;
uint16  nApLYL = 0;
uint16  nApLRL = 0;
uint16  Ap_Y_L_Ui = 0;
uint16  Ap_R_L_Ui = 0;
float   fCaValue=0.0;
float   fRrValue = 0.0;
uint16  nCaLYL=0;
uint16  nCaLRL=0;


/*@ behavior basic:
  @  assumes fRrValue == 0;
  @  ensures tenumRMode == SS_A_MODE;
  @
*/

void foo()
{

        float   mfNewAp = 0;
        BOOL    bYAp = FALSE;
        BOOL    bRAp = FALSE;
        BOOL    bApAlmC = FALSE;

        if (fRrValue != 0)
        {
            /* Some code here */
        }
        else
        {
                if (mnPb == 1)
                {
                        mfAp = RESP_STATE;
                        mnPb = 2;
                }

                tenumRMode = SS_A_MODE;
        }

        if ( (mfAp >= F_MIN_R) &&
                 ((gbCaMStatus == TRUE) && (gbCaaStatus == FALSE)) )
        {
                bApAlmC = TRUE;
                almC = 1;
        }
        else
        {
              almC = 0;
        }


        if ( (bApAlmC == TRUE)
                 && (mfAp < nApLYL)
                 && (fCaValue >= nCaLYL) )
        {
                float fmultval = 0;

                fmultval = gfApYLineSlope*fCaValue;

                mfNewAp = fmultval + gfApYLineConst;

                if (mfAp >= mfNewAp)
                        bYAp = TRUE;
                else
                        bYAp = FALSE;

                Ap_Y_L_Ui = (uint16)mfNewAp;
        }


        if ((bApAlmC == TRUE) && (fCaValue > (float)nCaLYL))
        {
                        mfNewAp = ((gfApYLineSlope*fCaValue) + gfApYLineConst);
                        if (mfNewAp < (float)nApLYL);
                                Ap_Y_L_Ui = (uint16)mfNewAp;
        }

        else if ((bApAlmC == TRUE) && (fCaValue <= (float)nCaLYL))
                Ap_Y_L_Ui = F_MIN_R;

        if ( (bApAlmC == TRUE) && (fCaValue >= nCaLRL) )
        {
                float fmultval = 0;

                fmultval = gfApRLineSlope*fCaValue;

                mfNewAp = fmultval + gfApRLineConst;


                if (mfAp >= mfNewAp)
 bRAp = TRUE;
                else
                        bRAp = FALSE;

                Ap_R_L_Ui = (uint16)mfNewAp;
        }
        else if ( (bApAlmC == TRUE) && (fCaValue < nCaLRL) )
                Ap_R_L_Ui = F_MIN_R;

        if ( (mfAp >= nApLYL)
                 || ((bApAlmC == TRUE) && (fCaValue < nCaLYL))
                 || ((bYAp == TRUE)
                         && (gbCaMStatus == TRUE)  && (gbCaaStatus == FALSE)  ) )
        {
                mbApLYRange = TRUE;
        }
        else
                mbApLYRange = FALSE;

        if ( (mfAp >= nApLRL)
                 || ((bApAlmC == TRUE) && (fCaValue < nCaLRL))
                 || ((bRAp == TRUE)
                        && (gbCaMStatus == TRUE) && (gbCaaStatus == FALSE) )  )
        {
            /* Some code here */
        }
}

1 个答案:

答案 0 :(得分:1)

您使用的是哪种版本的Alt-ergo和Frama-C?我使用 Frama-C Oxygen-20120901 Alt-Ergo版本0.95.2 (通过OPAM安装)尝试了您的示例,我得到了:

  

$ frama -c -wp -wp-rte -lib-entry -main foo foo.c -wp-bhv = basic
  [kernel]使用“gcc -C -E -I.foo.c”进行预处理   [wp]运行WP插件...
  [wp]收集公理用法
  foo.c:51:[wp]警告:[get_strategies]没有发现任何行为
  foo.c:51:[wp]警告:[get_strategies]没有发现任何行为
  [rte]注释函数foo
  [wp]预定1个目标   [wp] [Alt-Ergo]目标store_foo_basic_post:未知

当我直接尝试Alt-Ergo(第0.95.2节)时,我得到了:

  

$ alt-ergo store_foo_basic_post_po_ergo.why
  文件“store_foo_basic_post_po_ergo.why”,第1220行,字符22-24:语法错误

在手动修复语法错误后证明了VC。我认为 Alt-Ergo v。&gt; = 0.95 Frama-C Oxygen 不兼容。顺便说一句,我不知道OPAM没有在我的电脑上安装最新版本的Frama-C(即 Fluorine-20130601

- 问候