[ 0:01] compiling /var/obj/divine-nightly/semidbg/test/_expand/svcomp/loops/jm2006_true.pkg.c/small.10.c [ 0:01] compiling /dios/lib/config/seqklee.bc [ 0:01] setting up pass: functionmeta, options = [ 0:02] setting up pass: fuse-ctors, options = [ 0:02] KLEE: output directory is "/var/obj/divine-nightly/semidbg/test/__test_work_dir.21/_klee_out" [ 0:04] KLEE: Using Z3 solver backend [ 0:04] WARNING: this target does not support the llvm.stacksave intrinsic. [ 0:04] warning: Linking two modules of different target triples: klee_div_zero_check.bc' is 'x86_64-unknown-linux-gnu' whereas 'klee.bc' is 'x86_64-unknown-none-elf' [ 0:04] [ 0:04] KLEE: WARNING: undefined reference to function: __dios_tainted_init [ 0:07] KLEE: WARNING: undefined reference to function: klee_free [ 0:07] KLEE: WARNING: undefined reference to function: klee_malloc [ 0:07] i:1 [ 0:07] KLEE: WARNING ONCE: Alignment of memory from call "klee_malloc" is not modelled. Using alignment of 8. [ 0:07] about to __boot:0 [ 0:07] about to run the scheduler:0 [ 0:07] KLEE: WARNING ONCE: calling external: __dios_tainted_init() at /dios/libc/sys/start.cpp:49 5 [ 0:07] KLEE: ERROR: /dios/libc/sys/start.cpp:87: failed external call: __dios_tainted_init [ 0:07] KLEE: NOTE: now ignoring this error at this location [ 0:07] KLEE: ERROR: EXITING ON ERROR: [ 0:07] Error: failed external call: __dios_tainted_init [ 0:07] File: /dios/libc/sys/start.cpp [ 0:07] Line: 87 [ 0:07] assembly.ll line: 34102 [ 0:07] Stack: [ 0:07] #000034102 in __dios_start (l=0, argc=1, argv=94709861896712, envp=94709861982216) at /dios/libc/sys/start.cpp:87 [ 0:07] #100010121 in _ZN6__dios10sched_nullINS_5ClockINS_10NondetKleeINS_4BaseEEEEEE13run_schedulerINS_7ContextEEEvv () at /dios/sys/sched_null.hpp:163 [ 0:07] #200042452 in klee_boot (argc=2, argv=94709836897024) at /dios/arch/klee/boot.c:41 [ 0:07] [ 0:07] [ 0:07] 1 /* TAGS: c sym */ [ 0:07] 2 /* VERIFY_OPTS: --symbolic --sequential -o nofail:malloc */ [ 0:07] 3 /* CC_OPTS: -DNUM=10 */ [ 0:07] 4 [ 0:07] 5 // Source: Credited to Anubhav Gupta [ 0:07] 6 // appears in Ranjit Jhala, Ken McMillan: "A Practical and Complete Approach [ 0:07] 7 // to Predicate Refinement", TACAS 2006 [ 0:07] 8 extern void __VERIFIER_error(void); [ 0:07] 9 extern void __VERIFIER_assume(int); [ 0:07] 10 void __VERIFIER_assert(int cond) { [ 0:07] 11 if (!(cond)) { [ 0:07] 12 ERROR: __VERIFIER_error(); [ 0:07] 13 } [ 0:07] 14 return; [ 0:07] 15 } [ 0:07] 16 extern int __VERIFIER_nondet_int(void); [ 0:07] 17 [ 0:07] 18 // V: small.10 CC_OPT: -DNUM=10 [ 0:07] 19 // V: small.100 CC_OPT: -DNUM=100 TAGS: big [ 0:07] 20 // V: big.1000 CC_OPT: -DNUM=1000 TAGS: big [ 0:07] 21 // V: big.10000 CC_OPT: -DNUM=10000 TAGS: big [ 0:07] 22 // V: big.100000 CC_OPT: -DNUM=100000 TAGS: big [ 0:07] 23 [ 0:07] 24 int main() { [ 0:07] 25 int i, j; [ 0:07] 26 i = __VERIFIER_nondet_int(); [ 0:07] 27 j = __VERIFIER_nondet_int(); [ 0:07] 28 if (!(i >= 0 && j >= 0)) return 0; [ 0:07] 29 if (i >= NUM || j >= NUM) return 0; [ 0:07] 30 int x = i; [ 0:07] 31 int y = j; [ 0:07] 32 while(x != 0) { [ 0:07] 33 x--; [ 0:07] 34 y--; [ 0:07] 35 } [ 0:07] 36 [ 0:07] 37 if (i == j) { [ 0:07] 38 __VERIFIER_assert(y == 0); [ 0:07] 39 } [ 0:07] 40 return 0; [ 0:07] 41 } [ 0:07] # no errors were expected but one was found anyway