Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:23:57 2012

Optimize a model with 9580 rows, 4556 columns and 32962 nonzeros
Presolve removed 1074 rows and 2 columns
Presolve time: 0.35s
Presolved: 8506 rows, 4554 columns, 30162 nonzeros
Variable types: 0 continuous, 4554 integer (4554 binary)
Found heuristic solution: objective 67.0000000

Root relaxation: objective 3.000000e+00, 6035 iterations, 0.73 seconds

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

     0     0    3.00000    0  124   67.00000    3.00000  95.5%     -    4s
H    0     0                       4.0000000    3.00000  25.0%     -    4s
H    0     0                       3.0000000    3.00000   0.0%     -    4s

Explored 0 nodes (25007 simplex iterations) in 4.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%