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[Frama-c-discuss] Verifying recursive functions

You can fill a bug report, but a simple answer is that the \sum 
construct is not yet supported by Jessie yet, so it might be related.

You can design your own definition of \sum, specific to this instance, 
in a similar way I proposed a definition of \product in an answer to one 
of your previous mails.

- Claude

Hollas Boris (CR/AEY1) wrote:
> Hello,
> 
> Frama-c reports a fatal error when I run it on the following code:
> 
> 
> /*@
>   requires n >= 0;
>   ensures \result == \sum(0,n, \lambda integer i; i);
> */
> int sum(int n) {
>   if(n==0) return 0;
>   else return n + sum(n-1);
> }
> 
> 
> This is the output:
> 
> 
> ~/progs/fc/sum> frama-c -jessie-analysis sum.c
> Parsing
> [preprocessing] running gcc -C -E -I. -include C:\Frama-C\share\frama-c\jessie\jessie_prolog.h -dD sum.c
> Cleaning unused parts
> Symbolic link
> Starting semantical analysis
> Starting Jessie translation
> Fatal error: exception Assert_failure("src/jessie/interp.ml", 564, 19)
> 
> 
> Is this a bug in Jessie?
> 
> -Boris
> 
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-- 
Claude March?                          | tel: +33 1 72 92 59 69
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