Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:48:52 2012

Optimize a model with 4553 rows, 2162 columns and 15592 nonzeros
Presolve removed 1106 rows and 2 columns
Presolve time: 0.11s
Presolved: 3493 rows, 2160 columns, 14982 nonzeros
Variable types: 0 continuous, 2160 integer (2160 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 3.000000e+00, 3362 iterations, 0.33 seconds

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

     0     0    3.00000    0   76   46.00000    3.00000  93.5%     -    1s
H    0     0                      18.0000000    3.00000  83.3%     -    1s
H    0     0                       6.0000000    3.00000  50.0%     -    1s
H    0     0                       5.0000000    3.00000  40.0%     -    1s
     0     0    3.00000    0  104    5.00000    3.00000  40.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    1s

Cutting planes:
  Gomory: 3
  Clique: 2
  Zero half: 49

Explored 0 nodes (10843 simplex iterations) in 1.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%