make Nitpick tests more robust by specifying SAT solver, singlethreading (in Kodkod, not in Isabelle), and higher time limits
header {* Plain HOL *}
theory Plain
imports Datatype Record FunDef Extraction
begin
text {*
Plain bootstrap of fundamental HOL tools and packages; does not
include @{text Hilbert_Choice}.
*}
ML {* path_add "~~/src/HOL/Library" *}
end