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| package org.sat4j; |
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| |
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| import java.math.BigInteger; |
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| |
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| import org.sat4j.reader.OPBReader2005; |
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| import org.sat4j.specs.ContradictionException; |
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| import org.sat4j.specs.IConstr; |
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| import org.sat4j.specs.IProblem; |
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| import org.sat4j.specs.IVec; |
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| import org.sat4j.specs.TimeoutException; |
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| |
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| public class LanceurPseudo2005Dicho extends LanceurPseudo2005 { |
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| |
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0
| @Override
|
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| public static void main(String[] args) { |
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0
| Lanceur lanceur = new LanceurPseudo2005Dicho();
|
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| lanceur.run(args);
|
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| } |
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| |
20 |
0
| @Override
|
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| protected void solve(IProblem problem) throws TimeoutException { |
22 |
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| obfct = ((OPBReader2005) reader).getObjectiveFunction();
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23 |
0
| BigInteger min = BigInteger.ZERO, max = BigInteger.TEN;
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24 |
0
| IVec<BigInteger> coefs = obfct.getCoeffs();
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25 |
0
| for (BigInteger coef : coefs)
|
26 |
0
| if (coef.signum() < 0)
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27 |
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| min = min.add(coef);
|
28 |
| |
29 |
0
| if (!solver.isSatisfiable()) {
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30 |
0
| exitcode = ExitCode.UNSATISFIABLE;
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31 |
0
| return;
|
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| } |
33 |
0
| exitcode = ExitCode.SATISFIABLE;
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34 |
0
| bestSolution = problem.model();
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35 |
0
| if (obfct == null)
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36 |
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| return;
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37 |
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| System.out.println("c SATISFIABLE");
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38 |
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| System.out.println("c OPTIMIZING...");
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39 |
0
| IConstr lastadded = null;
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40 |
0
| boolean isSatisfiable = true;
|
41 |
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| BigInteger current = BigInteger.ZERO;
|
42 |
0
| while (min.compareTo(max) < 0) {
|
43 |
0
| if (isSatisfiable) {
|
44 |
0
| bestSolution = problem.model();
|
45 |
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| max = obfct.calculateDegree(bestSolution);
|
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| } else { |
47 |
0
| min = current;
|
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| assert lastadded != null; |
49 |
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| solver.removeConstr(lastadded);
|
50 |
| } |
51 |
0
| current = min.add(max).divide(BigInteger.valueOf(2));
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52 |
0
| if (current.equals(min)) {
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53 |
0
| exitcode = ExitCode.OPTIMUM_FOUND;
|
54 |
0
| return;
|
55 |
| } |
56 |
0
| System.out.printf(
|
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| "c CURRENT OPTIMUM="+max+"/"+min+" \t\tCurrent CPU time: %.2f ms\n", |
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| (System.currentTimeMillis() - begintime) / 1000.0); |
59 |
0
| try {
|
60 |
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| lastadded = solver.addPseudoBoolean(obfct.getVars(), obfct
|
61 |
| .getCoeffs(), false, current); |
62 |
0
| isSatisfiable = solver.isSatisfiable();
|
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| } catch (ContradictionException ex) { |
64 |
0
| isSatisfiable = false;
|
65 |
| } |
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| } |
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| } |
68 |
| |
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| } |