Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:30 2013

Optimize a model with 517 rows, 3776 columns and 174393 nonzeros
Presolve removed 20 rows and 12 columns
Presolve time: 1.84s
Presolved: 497 rows, 3764 columns, 172857 nonzeros
Variable types: 0 continuous, 3764 integer (3764 binary)
Found heuristic solution: objective 2500.0000000
Found heuristic solution: objective 2435.0000000

Root relaxation: objective 1.695500e+03, 733 iterations, 0.07 seconds

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

     0     0 1695.50000    0   18 2435.00000 1695.50000  30.4%     -    2s
H    0     0                    2282.0000000 1695.50000  25.7%     -    2s
H    0     0                    2184.0000000 1695.50000  22.4%     -    2s
     0     0 1778.00000    0   31 2184.00000 1778.00000  18.6%     -    2s
H    0     0                    1835.0000000 1778.00000  3.11%     -    2s
H    0     0                    1803.0000000 1778.00000  1.39%     -    2s
*    0     0               0    1780.0000000 1780.00000   0.0%     -    2s

Cutting planes:
  Clique: 6
  Zero half: 11

Explored 0 nodes (1163 simplex iterations) in 2.62 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.780000000000e+03, best bound 1.780000000000e+03, gap 0.0%