Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:14:50 2013

Optimize a model with 814 rows, 12145 columns and 509836 nonzeros
Presolve removed 10 rows and 4 columns
Presolve time: 2.32s
Presolved: 804 rows, 12141 columns, 509103 nonzeros
Variable types: 0 continuous, 12141 integer (12141 binary)
Found heuristic solution: objective 6374.0000000

Root relaxation: objective 4.291000e+03, 2491 iterations, 0.55 seconds

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

     0     0 4291.00000    0   26 6374.00000 4291.00000  32.7%     -    3s
H    0     0                    4853.0000000 4291.00000  11.6%     -    3s
*    0     0               0    4292.0000000 4292.00000   0.0%     -    3s

Cutting planes:
  Clique: 3
  Zero half: 2

Explored 0 nodes (2939 simplex iterations) in 3.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.292000000000e+03, best bound 4.292000000000e+03, gap 0.0%