Exception for VandenBroeck and Keller, Equation (6)

Specification

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \mathsf{PI}\left(\right) \cdot \ell\\ t\_0 - \frac{1}{F \cdot F} \cdot \tan t\_0 \end{array} \end{array} \]

(FPCore (F l)
 :precision binary64
 (let* ((t_0 (* (PI) l))) (- t_0 (* (/ 1.0 (* F F)) (tan t_0)))))

\begin{array}{l}

\\
\begin{array}{l}
t_0 := \mathsf{PI}\left(\right) \cdot \ell\\
t\_0 - \frac{1}{F \cdot F} \cdot \tan t\_0
\end{array}
\end{array}

Reproduce

herbie shell --seed 2025018 
(FPCore (F l)
  :name "VandenBroeck and Keller, Equation (6)"
  :precision binary64
  (- (* (PI) l) (* (/ 1.0 (* F F)) (tan (* (PI) l)))))

Please file a bug report with this information.

Backtrace

run-egg: cannot find proof; start and end are not equal. start: #s(approx (+ (* l (PI)) (PI)) (impl binary64 (PI))) end: (PI.f64)		L	C
add-derivations	/home/nightlies/herbie/new-encoding/src/core/derivations.rkt	101	0
extract!	/home/nightlies/herbie/new-encoding/src/core/mainloop.rkt	79	0
run-improve!	/home/nightlies/herbie/new-encoding/src/core/mainloop.rkt	45	0
get-alternatives/report	/home/nightlies/herbie/new-encoding/src/api/sandbox.rkt	174	0
(unnamed)	/home/nightlies/herbie/new-encoding/src/api/sandbox.rkt	265	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
in-engine	/home/nightlies/herbie/new-encoding/src/api/sandbox.rkt	283	2
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24