Specification

\[\begin{array}{l} \\ \log \left(1 + e^{x}\right) - x \cdot y \end{array} \]

(FPCore (x y) :precision binary64 (- (log (+ 1.0 (exp x))) (* x y)))

double code(double x, double y) {
	return log((1.0 + exp(x))) - (x * y);
}

real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = log((1.0d0 + exp(x))) - (x * y)
end function

public static double code(double x, double y) {
	return Math.log((1.0 + Math.exp(x))) - (x * y);
}

def code(x, y):
	return math.log((1.0 + math.exp(x))) - (x * y)

function code(x, y)
	return Float64(log(Float64(1.0 + exp(x))) - Float64(x * y))
end

function tmp = code(x, y)
	tmp = log((1.0 + exp(x))) - (x * y);
end

code[x_, y_] := N[(N[Log[N[(1.0 + N[Exp[x], $MachinePrecision]), $MachinePrecision]], $MachinePrecision] - N[(x * y), $MachinePrecision]), $MachinePrecision]

\begin{array}{l}

\\
\log \left(1 + e^{x}\right) - x \cdot y
\end{array}

Reproduce

herbie shell --seed 2024012 
(FPCore (x y)
  :name "Logistic regression 2"
  :precision binary64

  :herbie-target
  (if (<= x 0.0) (- (log (+ 1.0 (exp x))) (* x y)) (- (log (+ 1.0 (exp (- x)))) (* (- x) (- 1.0 y))))

  (- (log (+ 1.0 (exp x))) (* x y)))

Please file a bug report with this information.

Backtrace

car: contract violation expected: pair? given: '#(#s(si 7 84) (#s(si 1 78)))		L	C
err-lsts->split-indices	/home/nightlies/herbie/zane-regimes-2/src/core/regimes.rkt	176	0
option-on-expr	/home/nightlies/herbie/zane-regimes-2/src/core/regimes.rkt	106	0
infer-splitpoints	/home/nightlies/herbie/zane-regimes-2/src/core/regimes.rkt	39	0
loop	/home/nightlies/herbie/zane-regimes-2/src/core/regimes.rkt	27	2
loop	/home/nightlies/herbie/zane-regimes-2/src/core/regimes.rkt	27	2
extract!	/home/nightlies/herbie/zane-regimes-2/src/mainloop.rkt	352	0
run-improve!	/home/nightlies/herbie/zane-regimes-2/src/mainloop.rkt	326	0
get-alternatives/report	/home/nightlies/herbie/zane-regimes-2/src/sandbox.rkt	150	0
(unnamed)	/home/nightlies/herbie/zane-regimes-2/src/sandbox.rkt	246	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

could not determine a ground truth (more)

Specification

Reproduce

Backtrace