hello,
I follow the tutorial and use klee to test "echo" of coreutils, but the result 
has a difference from the turorial.
When I use the command 
"$klee --libc=uclibc --posix-runtime ./echo.bc --sym-arg 3", 
I get 67884 instructions while the tutorial gets 300193(it has 25 paths and 25 
test cases as well). Since the version of coreutils is 6.11 as the tutorial 
does, I'am confused that my result is much lesser than the tutorial's.

The tools I used are as listed:

CPU:AMD A8-5550M APU with Radeom(tm) HD Graphics 2.10GHz (64 bit)
OS:Ubuntu 14.04 LTS (64 bit)
Compiler:clang-3.5
Interpreter:klee-3.4

sincerely,
Oliver
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