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[Frama-c-discuss] [wp] unproved goals for strlen() function

  • Subject: [Frama-c-discuss] [wp] unproved goals for strlen() function
  • From: x_cui at hotmail.com (Xiao-lei Cui)
  • Date: Sat, 11 Jan 2014 05:53:30 -0500
  • In-reply-to: <CAA1cxuhydGEd8bf0rb=JXUo2Xr5RmTqzoumwWXb=veO2ZLOjZw@mail.gmail.com>
  • References: <BAY169-W753F885A8E7A8F9FF4B92D97B00@phx.gbl>, <CAA1cxuhydGEd8bf0rb=JXUo2Xr5RmTqzoumwWXb=veO2ZLOjZw@mail.gmail.com>
Hi,
   Thanks. You are right, the "loop assigns" cluase is wrong. 
  
/*@
  loop assigns s;
 */
 while (*s++ !=((signed char) '\0'))
 {
    ;
 }
    This will discharge the following proof obligation:
[wp] [Z3] Goal typed_strlen_loop_assign_part3.  
  
    But the post condition is still left unproved.  The spec seems to be correct? and  the automatic prover can not prove it due to complexity. I want to try Coq this time.

xiaolei
 		 	   		  
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