[klee-dev] How to use the max-time flag

[Rutledge, Richard L]

Please confirm the first two command lines.  You indicate that flags are switched, but the argument order is identical.

If by filename, you mean the bit-code program to execute, then the difference is order determines who processes the argument.

klee ... --max-time 10s ./echo.bc ... ->  max-time is an argument to klee
klee ... ./echo.bc --max-time 10s ... -> max-time is an argument passed to echo.bc.


________________________________
From: klee-dev-bounces at imperial.ac.uk <klee-dev-bounces at imperial.ac.uk> on behalf of Shaheen Cullen-Baratloo <shaheen at gmail.com>
Sent: Friday, May 22, 2020 17:47
To: klee-dev at imperial.ac.uk <klee-dev at imperial.ac.uk>
Subject: [klee-dev] How to use the max-time flag


Hi,

I'm trying to run klee on a compiled bytecode version of the coreutils, somewhat replicating the experiment that klee did a while back.

I'm having some trouble figuring out how to use the --max-time flag.

When I run this command, it takes around 3 minutes, despite the max-time being 10 seconds:

klee --optimize --libc=uclibc --posix-runtime --max-time 10s ./echo.bc --sym-args 0 1 10 --sym-args 0 2 2 --sym-files 1 8 --sym-stdin 8 --sym-stdout


When I run this command, it takes around 3 seconds. The command is identical, except for the fact that the filename and the --max-time flag are switched.

klee --optimize --libc=uclibc --posix-runtime --max-time 10s ./echo.bc --sym-args 0 1 10 --sym-args 0 2 2 --sym-files 1 8 --sym-stdin 8 --sym-stdout


Finally, when I run it without the --max-time flag

klee --optimize --libc=uclibc --posix-runtime ./echo.bc --sym-args 0 1 10 --sym-args 0 2 2 --sym-files 1 8 --sym-stdin 8 --sym-stdout


it takes at least 30 minutes, at which point I gave up and killed it.

Clearly, the flag before and after the filename are both doing something, but I'm not sure what. The standard usage for --max-time puts it before the filename according to the documentation. Can anyone help me understand what's happening?


Thanks in advance.
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