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

Optimize a model with 689 rows, 552 columns and 2505 nonzeros
Presolve removed 48 rows and 2 columns
Presolve time: 0.02s
Presolved: 641 rows, 550 columns, 2334 nonzeros
Variable types: 0 continuous, 550 integer (550 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 3.000000e+00, 418 iterations, 0.01 seconds

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

     0     0    3.00000    0   24   23.00000    3.00000  87.0%     -    0s
H    0     0                      19.0000000    3.00000  84.2%     -    0s
H    0     0                       3.0000000    3.00000   0.0%     -    0s

Explored 0 nodes (1082 simplex iterations) in 0.05 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%