[ 0:00]   | load /home/xrockai/src/divine/nightly/test/svcomp/recursion/Ackermann02_false.c Ackermann02_false.c
[ 0:00]   | expect --result error --location Ackermann02_false.c:45
[ 0:00]   | expect --trace FAULT: --trace-count 1
[ 0:00]   | cc -o testcase.bc Ackermann02_false.c
[ 0:00]   | verify --max-memory 4GiB --max-time 600 --threads 2 --report-filename verify.out --solver z3 --symbolic --sequential testcase.bc
[ 0:00] compiling Ackermann02_false.c
[ 0:00] loading bitcode … DiOS … LART … RR … constants … done
[ 0:12] booting … done
[ 0:12] states per second: 19.2708
[ 0:14] state count: 37
[ 0:14] mips: 0.14
[ 0:14] symbolic: 1
[ 0:15] 
[ 0:15] error found: yes
[ 0:15] error trace: |
[ 0:15]   ASSUME (not (bvslt var_1 #x00000000))
[ 0:15]   ASSUME (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003)))
[ 0:15]   ASSUME (not (bvslt var_2 #x00000000))
[ 0:15]   ASSUME (and (not (bvslt var_2 #x00000000)) (not (bvsgt var_2 #x00000017)))
[ 0:15]   ASSUME (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000)))
[ 0:15]   ASSUME (and (and (not (bvslt var_2 #x00000000)) (not (bvsgt var_2 #x00000017))) (= var_2 #x00000000))
[ 0:15]   ASSUME (and (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000)))
[ 0:15]   ASSUME (and (and (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000)))
[ 0:15]   ASSUME (and (and (and (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (= (bvsub (bvsub var_1 #x00000001) #x00000001) #x00000000))
[ 0:15]   ASSUME (and (and (and (and (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (= (bvsub (bvsub var_1 #x00000001) #x00000001) #x00000000)) (= (bvsub (bvsub var_1 #x00000001) #x00000001) #x00000000))
[ 0:15]   ASSUME (and (and (and (and (and (and (and (not (bvslt var_1 #x00000000)) (not (bvsgt var_1 #x00000003))) (not (= var_1 #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (not (= (bvsub var_1 #x00000001) #x00000000))) (= (bvsub (bvsub var_1 #x00000001) #x00000001) #x00000000)) (= (bvsub (bvsub var_1 #x00000001) #x00000001) #x00000000)) (not (bvslt var_1 #x00000002)))
[ 0:15]   FAULT: verifier error called
[ 0:15]   [0] FATAL: dios assertion violation in userspace
[ 0:15] 
[ 0:15] active stack:
[ 0:15]   - symbol: void __dios::FaultBase::handler<__dios::Context>(_VM_Fault, _VM_Frame*, void (*)())
[ 0:15]     location: /dios/sys/fault.hpp:118
[ 0:15]   - symbol: __dios_fault
[ 0:15]     location: /dios/arch/divm/fault.c:12
[ 0:15]   - symbol: __VERIFIER_error
[ 0:15]     location: /dios/libc/svcomp/svcomp-error.cpp:5
[ 0:15]   - symbol: main
[ 0:15]     location: Ackermann02_false.c:45
[ 0:15]   - symbol: __dios_start
[ 0:15]     location: /dios/libc/sys/start.cpp:94
[ 0:15] + divine sim --batch --skip-init --load-report verify.out
[ 0:15] 
[ 0:27]            ^       —————.   —.—  .     .  —.—  .     .  .—————    .    .
[ 0:27]           ———      |     |   |   |     |   |   |\    |  |         |    |
[ 0:27]          —(o)—     |     |   |   |     |   |   |  \  |  |————     '————|
[ 0:27]         ———————    |     |   |    \   /    |   |    \|  |              |
[ 0:27]        —————————   —————'   —'—     '     —'—  '     '  '—————         '
[ 0:27] 
[ 0:27] Welcome to 'divine sim', an interactive debugger. Type 'help' to get started.
[ 0:27] traced states:
[ 0:28] ▶ state    #6 [new] -- active threads: [0:0] --
[ 0:28] T: FAULT: verifier error called
[ 0:28] # executing void __dios::FaultBase::handler<{Context}>(_VM_Fault, _VM_Frame*, void (*)()) at /dios/sys/fault.hpp:118
[ 0:28] # NOTE: $frame in __dios_fault
[ 0:28] > backtrace
[ 0:28]   void __dios::FaultBase::handler<{Context}>(_VM_Fault, _VM_Frame*, void (*)()) at /dios/sys/fault.hpp:118
[ 0:28]   __dios_fault at /dios/arch/divm/fault.c:12
[ 0:28]   __VERIFIER_error at /dios/libc/svcomp/svcomp-error.cpp:5
[ 0:28]   main at Ackermann02_false.c:45
[ 0:28]   __dios_start at /dios/libc/sys/start.cpp:94
[ 0:28] # executing void __dios::FaultBase::handler<{Context}>(_VM_Fault, _VM_Frame*, void (*)()) at /dios/sys/fault.hpp:118
[ 0:28] # NOTE: $frame in __dios_fault