Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:09 2012

Optimize a model with 551 rows, 504 columns and 1879 nonzeros
Presolve removed 0 rows and 19 columns
Presolve time: 0.00s
Presolved: 551 rows, 485 columns, 1860 nonzeros
Variable types: 0 continuous, 485 integer (484 binary)
Found heuristic solution: objective 108.0000000

Root relaxation: objective 0.000000e+00, 258 iterations, 0.00 seconds

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

     0     0    0.00000    0  209  108.00000    0.00000   100%     -    0s
H    0     0                      92.0000000    0.00000   100%     -    0s
H    0     0                      90.0000000    0.00000   100%     -    0s
H    0     0                      86.0000000    0.00000   100%     -    0s
     0     0    0.45455    0  210   86.00000    0.45455  99.5%     -    0s
H    0     0                      79.0000000    0.45455  99.4%     -    0s
     0     0    0.95590    0  212   79.00000    0.95590  98.8%     -    0s
     0     0    0.95590    0  212   79.00000    0.95590  98.8%     -    0s
H    0     0                      61.0000000    0.95590  98.4%     -    0s
H    0     0                      50.0000000    0.95590  98.1%     -    0s
     0     2    0.95712    0  212   50.00000    0.95712  98.1%     -    0s
H   27    27                      40.0000000    3.13333  92.2%  36.5    0s
*   53    38              29      21.0000000    3.13333  85.1%  31.9    0s
H   56    30                      20.0000000    3.13333  84.3%  30.2    0s
  3663   570   18.52439   27  196   20.00000   15.00000  25.0%  23.3    5s

Explored 7897 nodes (167256 simplex iterations) in 9.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%