source: CIVL/examples/arithmetic/sqrt.cvl

#include <math.h>
$input double x;
$assume(x >= 0.0);

int main(int argc, char * argv[]) {
  double y = sqrt(x) + 1;

  if(x == 0.0)
    $assert(y == 1);
  else
    $assert(y > 1);
  return 0;
}