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[Frama-c-discuss] question about hybrid logic functions

>>  /*@ requires 0 < count_of{Here}(st);
>>   @ assigns st.my_abstraction;
>>   @ ensures  count_of{Here}(st) == count_of{Old}(\old(st)) - 1;
>>   @*/ 
>>
>> in fact, the labels {Here} and {Old} given to count_of are insignificant
>>   
>>     
> Wrong again. It is the \old(st) which is useless: st is not modified by 
> the function so \old(st)==st.
> In the other hand, count_of{Old}(st) is a priori different from 
> count_of{Here}(st) since count_of
>  reads st.my_abstraction and this is said to be assigned.
>   
I can't see is how you can 

 @ assigns st.my_abstraction
and

 @ ensures \old(st)==st

in a same specification ?

Patrick.

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