Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:05:08 2013

Optimize a model with 896 rows, 9295 columns and 609404 nonzeros
Presolve removed 20 rows and 39 columns
Presolve time: 1.22s
Presolved: 876 rows, 9256 columns, 606885 nonzeros
Variable types: 0 continuous, 9256 integer (9256 binary)
Found heuristic solution: objective 4765.0000000

Root relaxation: objective 4.128500e+03, 1915 iterations, 0.44 seconds

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

     0     0 4128.50000    0   22 4765.00000 4128.50000  13.4%     -    1s
H    0     0                    4250.0000000 4128.50000  2.86%     -    2s
*    0     0               0    4145.0000000 4145.00000   0.0%     -    2s

Cutting planes:
  Clique: 2
  Zero half: 2

Explored 0 nodes (2544 simplex iterations) in 2.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.145000000000e+03, best bound 4.145000000000e+03, gap 0.0%