[ 0:01] compiling /var/obj/divine-nightly/semidbg/test/_expand/svcomp/recursion/Addition01_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.14/_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 [ 0:06] KLEE: WARNING: undefined reference to function: klee_free [ 0:06] KLEE: WARNING: undefined reference to function: klee_malloc [ 0:06] about to __boot:0 [ 0:06] KLEE: WARNING ONCE: Alignment of memory from call "klee_malloc" is not modelled. Using alignment of 8. [ 0:06] about to run the scheduler:0 [ 0:06] KLEE: WARNING ONCE: calling external: __dios_tainted_init() at /dios/libc/sys/start.cpp:49 5 [ 0:06] KLEE: ERROR: /dios/libc/sys/start.cpp:87: failed external call: __dios_tainted_init [ 0:06] KLEE: NOTE: now ignoring this error at this location [ 0:06] KLEE: ERROR: EXITING ON ERROR: [ 0:06] Error: failed external call: __dios_tainted_init [ 0:06] File: /dios/libc/sys/start.cpp [ 0:06] Line: 87 [ 0:06] assembly.ll line: 34112 [ 0:06] Stack: [ 0:06] #000034112 in __dios_start (l=0, argc=1, argv=94485932441608, envp=94485932460040) at /dios/libc/sys/start.cpp:87 [ 0:06] #100010131 in _ZN6__dios10sched_nullINS_5ClockINS_10NondetKleeINS_4BaseEEEEEE13run_schedulerINS_7ContextEEEvv () at /dios/sys/sched_null.hpp:163 [ 0:06] #200042462 in klee_boot (argc=1, argv=94485919582272) at /dios/arch/klee/boot.c:41 [ 0:06] [ 0:06] [ 0:06] 1 /* VERIFY_OPTS: --symbolic --sequential */ [ 0:06] 2 /* TAGS: sym c */ [ 0:06] 3 /* CC_OPTS: -DNUM=10 */ [ 0:06] 4 [ 0:06] 5 extern void __VERIFIER_error() __attribute__ ((__noreturn__)); [ 0:06] 6 [ 0:06] 7 /* [ 0:06] 8 * Recursive implementation integer addition. [ 0:06] 9 * [ 0:06] 10 * Author: Matthias Heizmann [ 0:06] 11 * Date: 2013-07-13 [ 0:06] 12 * [ 0:06] 13 */ [ 0:06] 14 [ 0:06] 15 // V: small.10 CC_OPT: -DNUM=10 [ 0:06] 16 // V: small.100 CC_OPT: -DNUM=100 TAGS: big [ 0:06] 17 // V: small.1000 CC_OPT: -DNUM=1000 TAGS: big [ 0:06] 18 // V: big.1073741823 CC_OPT: -DNUM=1073741823 TAGS: big [ 0:06] 19 [ 0:06] 20 extern int __VERIFIER_nondet_int(void); [ 0:06] 21 [ 0:06] 22 int addition(int m, int n) { [ 0:06] 23 if (n == 0) { [ 0:06] 24 return m; [ 0:06] 25 } [ 0:06] 26 else if (n > 0) { [ 0:06] 27 return addition(m+1, n-1); [ 0:06] 28 } [ 0:06] 29 else { [ 0:06] 30 return addition(m-1, n+1); [ 0:06] 31 } [ 0:06] 32 } [ 0:06] 33 [ 0:06] 34 [ 0:06] 35 int main() { [ 0:06] 36 int m = __VERIFIER_nondet_int(); [ 0:06] 37 if (m < 0 || m > NUM) { [ 0:06] 38 // additional branch to avoid undefined behavior [ 0:06] 39 // (because of signed integer overflow) [ 0:06] 40 return 0; [ 0:06] 41 } [ 0:06] 42 int n = __VERIFIER_nondet_int(); [ 0:06] 43 if (n < 0 || n > NUM) { [ 0:06] 44 // additional branch to avoid undefined behavior [ 0:06] 45 // (because of signed integer overflow) [ 0:06] 46 return 0; [ 0:06] 47 } [ 0:06] 48 int result = addition(m,n); [ 0:06] 49 if (result == m + n) { [ 0:06] 50 return 0; [ 0:06] 51 } else { [ 0:06] 52 ERROR: __VERIFIER_error(); [ 0:06] 53 } [ 0:06] 54 } [ 0:06] # no errors were expected but one was found anyway