A4Solution solve(final A4Reporter rep, Command cmd, Simplifier simp, boolean tryBookExamples) throws Err, IOException {
// If already solved, then return this object as is
if (solved) return this;
// If cmd==null, then all four arguments are ignored, and we simply use the lower bound of each relation
if (cmd==null) {
Instance inst = new Instance(bounds.universe());
for(int max=max(), i=min(); i<=max; i++) {
Tuple it = factory.tuple(""+i);
inst.add(i, factory.range(it, it));
}
for(Relation r: bounds.relations()) inst.add(r, bounds.lowerBound(r));
eval = new Evaluator(inst, solver.options());
rename(this, null, null, new UniqueNameGenerator());
solved();
return this;
}
// Otherwise, prepare to do the solve...
final A4Options opt = originalOptions;
long time = System.currentTimeMillis();
rep.debug("Simplifying the bounds...\n");
if (simp!=null && formulas.size()>0 && !simp.simplify(rep, this, formulas)) addFormula(Formula.FALSE, Pos.UNKNOWN);
rep.translate(opt.solver.id(), bitwidth, maxseq, solver.options().skolemDepth(), solver.options().symmetryBreaking());
Formula fgoal = Formula.and(formulas);
rep.debug("Generating the solution...\n");
kEnumerator = null;
Solution sol = null;
final Reporter oldReporter = solver.options().reporter();
final boolean solved[] = new boolean[]{true};
solver.options().setReporter(new AbstractReporter() { // Set up a reporter to catch the type+pos of skolems
@Override public void skolemizing(Decl decl, Relation skolem, List<Decl> predecl) {
try {
Type t=kv2typepos(decl.variable()).a;
if (t==Type.EMPTY) return;
for(int i=(predecl==null ? -1 : predecl.size()-1); i>=0; i--) {
Type pp=kv2typepos(predecl.get(i).variable()).a;
if (pp==Type.EMPTY) return;
t=pp.product(t);
}
kr2type(skolem, t);
} catch(Throwable ex) { } // Exception here is not fatal
}
@Override public void solvingCNF(int primaryVars, int vars, int clauses) {
if (solved[0]) return; else solved[0]=true; // initially solved[0] is true, so we won't report the # of vars/clauses
if (rep!=null) rep.solve(primaryVars, vars, clauses);
}
});
if (!opt.solver.equals(SatSolver.CNF) && !opt.solver.equals(SatSolver.KK) && tryBookExamples) { // try book examples
A4Reporter r = "yes".equals(System.getProperty("debug")) ? rep : null;
try { sol = BookExamples.trial(r, this, fgoal, solver, cmd.check); } catch(Throwable ex) { sol = null; }
}
solved[0] = false; // this allows the reporter to report the # of vars/clauses
for(Relation r: bounds.relations()) { formulas.add(r.eq(r)); } // Without this, kodkod refuses to grow unmentioned relations
fgoal = Formula.and(formulas);
// Now pick the solver and solve it!
if (opt.solver.equals(SatSolver.KK)) {
File tmpCNF = File.createTempFile("tmp", ".java", new File(opt.tempDirectory));
String out = tmpCNF.getAbsolutePath();
Util.writeAll(out, debugExtractKInput());
rep.resultCNF(out);
return null;
}
if (opt.solver.equals(SatSolver.CNF)) {
File tmpCNF = File.createTempFile("tmp", ".cnf", new File(opt.tempDirectory));
String out = tmpCNF.getAbsolutePath();
solver.options().setSolver(WriteCNF.factory(out));
try { sol = solver.solve(fgoal, bounds); } catch(WriteCNF.WriteCNFCompleted ex) { rep.resultCNF(out); return null; }
// The formula is trivial (otherwise, it would have thrown an exception)
// Since the user wants it in CNF format, we manually generate a trivially satisfiable (or unsatisfiable) CNF file.
Util.writeAll(out, sol.instance()!=null ? "p cnf 1 1\n1 0\n" : "p cnf 1 2\n1 0\n-1 0\n");
rep.resultCNF(out);
return null;
}
if (solver.options().solver()==SATFactory.ZChaff || !solver.options().solver().incremental()) {
rep.debug("Begin solve()\n");
if (sol==null) sol = solver.solve(fgoal, bounds);
rep.debug("End solve()\n");
} else {
rep.debug("Begin solveAll()\n");
kEnumerator = new Peeker<Solution>(solver.solveAll(fgoal, bounds));
if (sol==null) sol = kEnumerator.next();
rep.debug("End solveAll()\n");
}
if (!solved[0]) rep.solve(0, 0, 0);
final Instance inst = sol.instance();
// To ensure no more output during SolutionEnumeration
solver.options().setReporter(oldReporter);
// If unsatisfiable, then retreive the unsat core if desired
if (inst==null && solver.options().solver()==SATFactory.MiniSatProver) {
try {