int SIZE = 50000001;
void abort() { };

int __VERIFIER_nondet_int();
                        
                                                                                                                                                          
                                                                        
                        
void assume_abort_if_not(int cond) {
  if(!cond) {abort();}
}
/*@ 
    requires (((1 <= cond) && (50000001 <= SIZE))) && (cond != 0);
    ensures ((((1 <= cond) && (50000001 <= SIZE)) && (SIZE == \old(SIZE)))) && (1);
@*/
void __VERIFIER_assert(int cond) {
  if (!(cond)) {
    ERROR: {/*@ assert(0); */;abort();}
  }
  return;
}


/*@ 
    requires ((50000001 <= SIZE));
    ensures (((50000001 <= SIZE) && (SIZE == \old(SIZE))));
@*/
int main() {
  int i,j;
  i = 0; j=0;
/*@
loop invariant (((((i >= 0) ? (i % 4) : ((i % 4) + 4)) == 0) && (50000001 <= SIZE)));
@*/
  while(i<SIZE){ 

    if(__VERIFIER_nondet_int())	  
      i = i + 8; 
    else
     i = i + 4;    
	  
  }
  j = i/4 ;
    __VERIFIER_assert( (j * 4) == i);
  return 0;
}