extern void abort(void);
#include <assert.h>
void reach_error() { assert(0); }
void __VERIFIER_assert(int cond) { if(!(cond)) { ERROR: {reach_error();abort();} } }
extern int __VERIFIER_nondet_int();

#define size 10000
int main( )
{
  int a[size];
  int b[size];
  int i = 0;
  int j = 0;
  while( i < size )
  {
	b[i] = __VERIFIER_nondet_int();
    i = i+1;
  }

  i = 1;
  while( i < size )
  {
	a[j] = b[i];
        i = i+3;
        j = j+1;
  }

  i = 1;
  j = 0;
  while( i < size )
  {
	__VERIFIER_assert( a[j] == b[3*j+1] );
        i = i+3;
        j = j+1;
  }
  return 0;
}