Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:37:48 2012

Optimize a model with 274 rows, 765 columns and 765 nonzeros
Model has 546 quadratic constraints
Presolve removed 0 rows and 21 columns
Presolve time: 3.18s
Presolved: 274 rows, 744 columns, 744 nonzeros
Variable types: 546 continuous, 198 integer (197 binary)

Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                     142.0000000          -     -      -    3s
     0     0    0.00000    0  168  142.00000    0.00000   100%     -    3s
     0     0    0.21262    0  196  142.00000    0.21262   100%     -    3s
     0     2    0.22518    0  196  142.00000    0.22518   100%     -    3s
H   54    54                      24.0000000    1.34848  94.4%  34.4    3s
*   70    68              43      20.0000000    1.34848  93.3%  31.4    3s
   606   236    9.61765   14  460   20.00000    9.61765  51.9%  36.6    5s
  2246   675   19.69231   45  469   20.00000   10.77143  46.1%  41.2   10s
* 2977   770              58      19.0000000   11.82967  37.7%  39.9   11s
  4199   750     cutoff   39        19.00000   13.27273  30.1%  40.8   15s
  5267   639   16.97701   33  472   19.00000   14.26699  24.9%  40.0   21s
  5546   596   17.39611   34  459   19.00000   14.50000  23.7%  39.6   25s
  6244   435     cutoff   39        19.00000   15.27273  19.6%  39.9   30s

Explored 7079 nodes (284402 simplex iterations) in 32.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%