eliminate trivial case splits from Isar proofs

remove debugging code

merged

minor improvements

identify axioms/conjectures more reliably in ATP proofs (an empty dependency list doesn't always indicate an axiom or conjecture!)

added "no_atp" for theorems that are automatically used or included by Sledgehammer when appropriate (about combinators and fequal)

in "overlord" mode: ignore problem prefix specified in the .thy file

uncomment code

redid some Sledgehammer/Metis proofs

fix more "undeclared symbol" errors related to SPASS's DFG format

be more discriminate: some one-line Isar proofs are silly

one-step Isar proofs are not always pointless

the SPASS output syntax is more general than I thought -- such a pity that there's no documentation

redo more Metis/Sledgehammer example

fixed definition of "bad frees" so that it actually works

don't remove last line of proof

handle previously unknown SPASS syntaxes in Sledgehammer's proof reconstruction

make SML/NJ happy, take 2

use readable names in "debug" mode for type vars + don't pipe facts using "using" but rather give them directly to metis (works better with type variables)

expand combinators in Isar proofs constructed by Sledgehammer; this requires shuffling around a couple of functions previously defined in Refute

more neg_clausify proofs that get replaced by direct proofs

redo some of the metis proofs

back to Vampire 9 -- Vampire 11 sometimes outputs really weird proofs

improve unskolemization

make sure short theorem names are preferred to composite ones in Sledgehammer; this code used to work at some point

properly extract SPASS proof

try out Vampire 11 and parse its output correctly; will revert to Vampire 9 if 11 doesn't perform as well

return updated info record after termination proof

proper context for rule_by_tactic;

conditional warnings: explicitly observe context visibility flag, not just accidental presence of a context; map_ss: explicitly provide a temporary context, which might be required for mksimps, mkcongs etc.;