// RUN: %clang %s -emit-llvm %O0opt -c -o %t2.bc
// RUN: rm -rf %t.klee-out
// RUN: %klee --output-dir=%t.klee-out --posix-runtime --exit-on-error %t2.bc --sym-files 1 10
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

int main(int argc, char **argv) {
  int fd = open("A", O_TRUNC);
  assert(fd == 3);
  assert(!close(0));
  assert(!close(1));
  assert(close(0) == -1);
  assert(close(1) == -1);
  assert(open("A", O_TRUNC) == 0);  
  assert(dup(0) == 1);
  assert(open("A", O_TRUNC) == 4);
  assert(!close(1));
  assert(open("A", O_TRUNC) == 1);
  assert(dup(0) != 1);
  assert(dup2(0,1) == 1);
  
  return 0;
}