Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:08:02 2012

Optimize a model with 643 rows, 552 columns and 2367 nonzeros
Presolve removed 97 rows and 71 columns
Presolve time: 0.02s
Presolved: 546 rows, 481 columns, 2020 nonzeros
Variable types: 0 continuous, 481 integer (481 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 3.000000e+00, 355 iterations, 0.00 seconds

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

     0     0    3.00000    0    8   23.00000    3.00000  87.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
H    0     0                       3.0000000    3.00000   0.0%     -    0s

Explored 0 nodes (988 simplex iterations) in 0.03 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%