  We formally specified a program logic for higher-order procedural variables
and non-local jumps with Ott and Twelf. Moreover, the dependent type systems
and the translation are both executable specifications thanks to Twelf's logic
programming engine. In particular, relying on Filinski's encoding of
shift/reset using callcc/throw and a global meta-continuation (simulated in
state passing style), we have mechanically checked the correctness of a few
examples (all source files are available on request).
