don't early error on SMT_Failure.Other_Failure
Otherwise, `by (smt A | metis B)` would fail if `smt A` fails with Other_Failure, even if `metis B` would succeed.
%%
%% default hyperref setup (both for pdf and dvi output)
%%
\usepackage{color}
\definecolor{linkcolor}{rgb}{0,0,0.5}
\usepackage[colorlinks=true,linkcolor=linkcolor,citecolor=linkcolor,filecolor=linkcolor,urlcolor=linkcolor,pdfpagelabels]{hyperref}