[L1124]               0  char *v;
[L1161]               0  pthread_t t;
[L1162]  FCALL, FORK  0  pthread_create(&t, 0, thread0, 0)
         VAL             [\old(arg)={0:0}, t=-1, v={0:0}]
[L1146]               1  pthread_t t1, t2, t3, t4, t5;
[L1147]  FCALL, FORK  1  pthread_create(&t1, 0, thread1, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, arg={0:0}, t1=0, v={0:0}]
[L1127]               2  v = malloc(sizeof(char))
[L1128]               2  return 0;
[L1148]  FCALL, JOIN  2  pthread_join(t1, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, t1=0, v={-2:0}]
[L1149]  FCALL, FORK  1  pthread_create(&t2, 0, thread2, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, v={-2:0}]
[L1150]  FCALL, FORK  1  pthread_create(&t3, 0, thread3, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, v={-2:0}]
[L1151]  FCALL, FORK  1  pthread_create(&t4, 0, thread2, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, v={-2:0}]
[L1152]  FCALL, FORK  1  pthread_create(&t5, 0, thread2, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1133]               3  v[0] = 'X'
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1135]               3  return 0;
[L1153]  FCALL, JOIN  3  pthread_join(t2, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1133]               6  v[0] = 'X'
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1135]               6  return 0;
[L1133]               5  v[0] = 'X'
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1135]               5  return 0;
[L1140]               4  v[0] = 'Y'
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1142]               4  return 0;
[L1154]  FCALL, JOIN  4  pthread_join(t3, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1155]  FCALL, JOIN  5  pthread_join(t4, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1156]  FCALL, JOIN  6  pthread_join(t5, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1157]               1  return 0;
[L1163]  FCALL, JOIN  1  pthread_join(t, 0)
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, t1=0, t2=1, t3=2, t4=3, t5=4, t=-1, v={-2:0}]
[L1164]  EXPR         0  v[0]
[L1164]  CALL         0  __VERIFIER_assert(v[0] == 'X')
[L1123]  COND TRUE    0  !expression
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(expression)=0, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]
[L1123]               0  reach_error()
         VAL             [\old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(arg)={0:0}, \old(expression)=0, \result={0:0}, \result={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, t1=0, t2=1, t3=2, t4=3, t5=4, v={-2:0}]