#pragma CIVL ACSL

int x = 9;

/*@ predicate eq(int a, int b) =
  @   a == x && b == x;
  @ 
  @ predicate eq(int a, int b);
  @*/
int main(){
  int a = 9;
  int b = 9;
  
  $assert(eq(a, b));
  x = 8;
  $assert(!eq(a, b));
}
