Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:30:50 2012

Optimize a model with 16659 rows, 4970 columns and 54598 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.57s
Presolved: 16657 rows, 4968 columns, 54122 nonzeros
Variable types: 0 continuous, 4968 integer (4968 binary)
Found heuristic solution: objective 70.0000000

Root relaxation: objective 2.000000e+00, 3660 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  140   70.00000    2.00000  97.1%     -    1s
H    0     0                      69.0000000    2.00000  97.1%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2861    5.00000    3.00000  40.0%     -   12s
     0     0    3.00000    0  334    5.00000    3.00000  40.0%     -   21s
H    0     0                       4.0000000    3.00000  25.0%     -   32s
     0     2    3.00000    0  334    4.00000    3.00000  25.0%     -   32s

Cutting planes:
  Clique: 18

Explored 1 nodes (99615 simplex iterations) in 38.26 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%