Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:05:21 2012

Optimize a model with 15386 rows, 4830 columns and 50644 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.51s
Presolved: 15384 rows, 4828 columns, 50198 nonzeros
Variable types: 0 continuous, 4828 integer (4828 binary)
Found heuristic solution: objective 69.0000000

Root relaxation: objective 2.000000e+00, 3673 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  138   69.00000    2.00000  97.1%     -    0s
H    0     0                      57.0000000    2.00000  96.5%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 1287    5.00000    3.00000  40.0%     -    7s
     0     0    3.00000    0 1944    5.00000    3.00000  40.0%     -    8s
H    0     0                       4.0000000    3.00000  25.0%     -    9s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   10s

Cutting planes:
  Gomory: 1
  Clique: 41
  Zero half: 13

Explored 0 nodes (31534 simplex iterations) in 10.52 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%