use rc2.py from python-sat instead of qmaxsat for macos/future-proofness

install.sh

@@ -132,26 +132,8 @@ then
   popd
 fi
 
-# Does not work on MacOS?
-### QMaxSat solver
-if ! hash qmaxsat 2>/dev/null
-then
-  qmaxsat_url=https://maxsat-evaluations.github.io/2018/mse18-solver-src/complete/QMaxSAT.zip
-  qmaxsat_archive=${qmaxsat_url##*/}
-  if [[ ! -r $qmaxsat_archive ]]
-  then
-    curl -fsSLO $qmaxsat_url
-  fi
-  unzip $qmaxsat_archive
-  pushd QMaxSAT/code
-  make
-  sudo cp qmaxsat_g3 /usr/local/bin/qmaxsat
-  popd
-  rm -Rf QMaxSAT
-fi
-
-### Jupyter
-packages='jupyter bokeh ipywidgets'
+### Jupyter and python-sat
+packages='python-sat jupyter bokeh ipywidgets'
 if hash pip3 2>/dev/null
 then
   pip3 install -U $packages

sat.pl

@@ -114,8 +114,8 @@ run_sat(FileIn, Bottom, Sepis) :-
 call_maxsat(FileIn, Sepis):-
   debug(sepi, "running maxsatsolver", []),
   process_create(
-    path('qmaxsat'),
-    [FileIn],
+    path('rc2.py'),
+    ['-vv', FileIn],
     [process(Id), stderr(null), stdout(pipe(Stream))]
   ),
   (
@@ -161,7 +161,7 @@ write_sat_header(Stream) :-
   format(Stream, "c ~w~np cnf ~d ~d~n", [Comment, Vars, Clauses]).
 
 
-%%  read_lines for qqmaxsat
+%%  read_lines for rc2.py/qqmaxsat
 read_lines(Stream, Output) :-
   read_line_to_codes(Stream, Codes),
   read_lines(Codes, Stream, Solutions, Optimum),