Timeout after 2.5m

Use the --timeout flag to change the timeout.

\[\frac{x}{x + 1} - \frac{x + 1}{x - 1}\]

\frac{x}{x + 1} - \frac{x + 1}{x - 1}

double code(double x) {
	return ((double) (((double) (x / ((double) (x + 1.0)))) - ((double) (((double) (x + 1.0)) / ((double) (x - 1.0))))));
}

Reproduce

herbie shell --seed 2020149 
(FPCore (x)
  :name "Asymptote C"
  :precision binary64
  (- (/ x (+ x 1.0)) (/ (+ x 1.0) (- x 1.0))))