source: CIVL/examples/arithmetic/divisionBad.cvl

/* divisionBad.cvl: denominator in division could be 0,
 * so error should be reported.
 * 
 * Commandline execution:
 *              civl verify divisionBad.cvl
 */
$input double x;
$input double y; // could be 0

void main() {
  double z = x/y;
  $assert(y*z==x);
}