src/Doc/Sledgehammer/document/root.tex

 higher-order places (e.g., in set comprehensions). The method is automatically
 tried as a fallback when \textit{metis} fails, and it is sometimes
 generated by Sledgehammer instead of \textit{metis} if the proof obviously
 requires type information or if \textit{metis} failed when Sledgehammer
 preplayed the proof. (By default, Sledgehammer tries to run \textit{metis} with
-various sets of option for up to 2~seconds each time to ensure that the generated
+various sets of option for up to 1~second each time to ensure that the generated
 one-line proofs actually work and to display timing information. This can be
 configured using the \textit{preplay\_timeout} and \textit{dont\_preplay}
 options (\S\ref{timeouts}).)
 %
 At the other end of the soundness spectrum, \textit{metis} (\textit{no\_types})

 \begin{enum}
 \opdefault{timeout}{float}{\upshape 30}
 Specifies the maximum number of seconds that the automatic provers should spend
 searching for a proof. This excludes problem preparation and is a soft limit.
 
-\opdefault{preplay\_timeout}{float}{\upshape 2}
+\opdefault{preplay\_timeout}{float}{\upshape 1}
 Specifies the maximum number of seconds that \textit{metis} or other proof
 methods should spend trying to ``preplay'' the found proof. If this option
 is set to 0, no preplaying takes place, and no timing information is displayed
 next to the suggested proof method calls.