#define NULL 0

struct list_el {
  int val;
  struct list_el *next;
};

typedef struct list_el item;

int main()
{
  item *curr, *head;

//  head = NULL;

  curr = (item *)malloc(sizeof(item));
  __ESBMC_assume(curr);
  curr->val = 1;
  curr->next  = head;
  head = curr;

  curr = (item *)malloc(sizeof(item));
  __ESBMC_assume(curr);
  curr->val = 2;
  curr->next  = head;
  head = curr;
 
//  assert(head->val==1);
  assert(0);
}
