Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:39:01 2012

Optimize a model with 18719 rows, 5256 columns and 61054 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.68s
Presolved: 18717 rows, 5254 columns, 60534 nonzeros
Variable types: 0 continuous, 5254 integer (5254 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 2.000000e+00, 3865 iterations, 0.14 seconds

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

     0     0    2.00000    0  144   71.00000    2.00000  97.2%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0  990    5.00000    3.00000  40.0%     -   13s
     0     0    3.00000    0 3308    5.00000    3.00000  40.0%     -   14s
H    0     0                       4.0000000    3.00000  25.0%     -   17s
     0     0    3.00000    0 3160    4.00000    3.00000  25.0%     -   25s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   26s

Cutting planes:
  Clique: 57
  Zero half: 8

Explored 0 nodes (71119 simplex iterations) in 26.66 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%