I tried proofgeneral on the newly released emacs and it works at first sight 
but seems to have some problems with long input, like the one produced by this 
bash script:

function mk { echo "Check fun n, match n with "; s=O; for ((i=0;i<$1;i++)); do 
echo "  | $s => n"; s="(S $s)"; done; echo "  | _ => n end."; } > x.v

Processing x.v for small arguments like
$ mk 10
works but for bigger ones like
$ mk 100
it blocks without consuming cpu.
Weirdly for me the threshold seems to be 42...
Paolo Herms
PhD Student - CEA Software Safety Lab. / Inria ProVal project-team
Paris, France

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