Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:27 2013

Optimize a model with 526 rows, 3912 columns and 199497 nonzeros
Presolve removed 7 rows and 7 columns
Presolve time: 0.65s
Presolved: 519 rows, 3905 columns, 199021 nonzeros
Variable types: 0 continuous, 3905 integer (3905 binary)
Found heuristic solution: objective 3119.0000000
Found heuristic solution: objective 2621.0000000

Root relaxation: objective 2.116933e+03, 1041 iterations, 0.11 seconds

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

     0     0 2116.93333    0   31 2621.00000 2116.93333  19.2%     -    0s
H    0     0                    2329.0000000 2116.93333  9.11%     -    0s
*    0     0               0    2139.0000000 2139.00000   0.0%     -    1s

Cutting planes:
  Gomory: 2
  Clique: 1
  Zero half: 3

Explored 0 nodes (1220 simplex iterations) in 1.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.139000000000e+03, best bound 2.139000000000e+03, gap 0.0%