Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:11:57 2012

Optimize a model with 3749 rows, 650 columns and 11773 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3747 rows, 648 columns, 18108 nonzeros
Variable types: 0 continuous, 648 integer (648 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 4.156250e+00, 2268 iterations, 0.12 seconds

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

     0     0    4.15625    0  436   25.00000    4.15625  83.4%     -    0s
     0     0    5.00000    0   96   25.00000    5.00000  80.0%     -    0s
H    0     0                      22.0000000    5.00000  77.3%     -    0s
H    0     0                       6.0000000    5.00000  16.7%     -    0s
     0     0    5.00000    0  100    6.00000    5.00000  16.7%     -    1s
     0     0 infeasible    0         6.00000    5.00001  16.7%     -    1s

Explored 0 nodes (7151 simplex iterations) in 1.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%