?

\[\log x - \log \log x \]

(FPCore (x) :precision binary64 (- (log x) (log (log x))))

double code(double x) {
	return log(x) - log(log(x));
}

real(8) function code(x)
    real(8), intent (in) :: x
    code = log(x) - log(log(x))
end function

public static double code(double x) {
	return Math.log(x) - Math.log(Math.log(x));
}

def code(x):
	return math.log(x) - math.log(math.log(x))

function code(x)
	return Float64(log(x) - log(log(x)))
end

function tmp = code(x)
	tmp = log(x) - log(log(x));
end

code[x_] := N[(N[Log[x], $MachinePrecision] - N[Log[N[Log[x], $MachinePrecision]], $MachinePrecision]), $MachinePrecision]

\log x - \log \log x

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023241 
(FPCore (x)
  :name "Jmat.Real.lambertw, estimator"
  :precision binary64
  (- (log x) (log (log x))))

match: no matching clause for 'ival		L	C
compile-progs	/home/nightlies/herbie/arb-support/src/programs.rkt	122	0
make-search-func	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	20	0
sample-points	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	64	0
setup-context!	/home/nightlies/herbie/arb-support/src/mainloop.rkt	293	0
get-alternatives/report	/home/nightlies/herbie/arb-support/src/sandbox.rkt	148	0
(unnamed)	/home/nightlies/herbie/arb-support/src/sandbox.rkt	247	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24