[ 0:00] compiling /home/xrockai/src/divine/nightly/test/libcxx/2.future-exits.cpp
[ 0:00] states per second: 23.5664
[ 0:17] state count: 30
[ 0:17] mips: 0.33
[ 0:17] 
[ 0:21] error found: yes
[ 0:21] error trace: |
[ 0:21]   (0) FAULT: Assertion failed: false, file /home/xrockai/src/divine/nightly/test/libcxx/2.future-exits.cpp, line 15.
[ 0:21]   [0] FATAL: assertion failure in userspace
[ 0:21] 
[ 0:21] stack 2:
[ 0:21]   - symbol: pthread_mutex_unlock
[ 0:21]     location: /divine/include/libc/include/sys/interrupt.h:32
[ 0:21]   - symbol: std::__2::mutex::unlock()
[ 0:21]     location: /divine/include/libcxx/include/__threading_support:257
[ 0:21]   - symbol: void std::__2::__assoc_state<int>::set_value<int>(int&&)
[ 0:21]     location: /divine/include/libcxx/include/__mutex_base:157
[ 0:21]   - symbol: std::__2::__async_assoc_state<int, std::__2::__async_func<main::$_0> >::__execute()
[ 0:21]     location: /divine/include/libcxx/include/future:980
[ 0:21]   - symbol: void* std::__2::__thread_proxy<std::__2::tuple<std::__2::unique_ptr<std::__2::__thread_struct, std::__2::default_delete<std::__2::__thread_struct> >, void (std::__2::__async_assoc_state<int, std::__2::__async_func<main::$_0> >::*)(), std::__2::__async_assoc_state<int, std::__2::__async_func<main::$_0> >*> >(void*)
[ 0:21]     location: /divine/include/libcxx/include/type_traits:4242
[ 0:21]   - symbol: __pthread_entry
[ 0:21]     location: /divine/src/libc/functions/sys/pthread.cpp:462
[ 0:21] active stack:
[ 0:21]   - symbol: void {Fault}::handler<{Context} >(_VM_Fault, _VM_Frame*, void (*)(), ...)
[ 0:21]     location: /divine/include/dios/core/fault.hpp:187
[ 0:21]   - symbol: __dios_fault
[ 0:21]     location: /divine/src/libc/functions/sys/fault.c:25
[ 0:21]   - symbol: main
[ 0:21]     location: /home/xrockai/src/divine/nightly/test/libcxx/2.future-exits.cpp:15
[ 0:21]   - symbol: _start
[ 0:21]     location: /divine/src/libc/functions/sys/start.cpp:76
[ 0:21] a report was written to verify.out
[ 0:21] 
[ 0:31]            ^       —————.   —.—  .     .  —.—  .     .  .—————    .    .
[ 0:31]           ———      |     |   |   |     |   |   |\    |  |         |    |
[ 0:31]          —(o)—     |     |   |   |     |   |   |  \  |  |————     '————|
[ 0:31]         ———————    |     |   |    \   /    |   |    \|  |              |
[ 0:31]        —————————   —————'   —'—     '     —'—  '     '  '—————         '
[ 0:31] 
[ 0:31] Welcome to 'divine sim', an interactive debugger. Type 'help' to get started.
[ 0:31] traced states: #1 #2 #3 #4 #5 #6 #7
[ 0:35] # active threads: [0:0] 0:1
[ 0:35] T: (0) FAULT: Assertion failed: false, file /home/xrockai/src/divine/nightly/test/libcxx/2.future-exits.cpp, line 15.
[ 0:35] T: [0] FATAL: assertion failure in userspace
[ 0:35] # executing void {Fault}::handler<{Context} >(_VM_Fault, _VM_Frame*, void (*)(), ...) at /divine/include/dios/core/fault.hpp:187
[ 0:35] # NOTE: $frame in __dios_fault
[ 0:35] > backtrace
[ 0:35]   void {Fault}::handler<{Context} >(_VM_Fault, _VM_Frame*, void (*)(), ...) at /divine/include/dios/core/fault.hpp:187
[ 0:35]   __dios_fault at /divine/src/libc/functions/sys/fault.c:25
[ 0:35]   main at /home/xrockai/src/divine/nightly/test/libcxx/2.future-exits.cpp:15
[ 0:36]   _start at /divine/src/libc/functions/sys/start.cpp:76
[ 0:36] # executing void {Fault}::handler<{Context} >(_VM_Fault, _VM_Frame*, void (*)(), ...) at /divine/include/dios/core/fault.hpp:187
[ 0:36] # NOTE: $frame in __dios_fault