Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:28:19 2012

Optimize a model with 7496 rows, 2652 columns and 24886 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.14s
Presolved: 7545 rows, 2650 columns, 27193 nonzeros
Variable types: 0 continuous, 2650 integer (2650 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 2.000000e+00, 1971 iterations, 0.05 seconds

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

     0     0    2.00000    0  102   51.00000    2.00000  96.1%     -    0s
H    0     0                      49.0000000    2.00000  95.9%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0  473    5.00000    3.00000  40.0%     -    0s
     0     0    3.03158    0 1761    5.00000    3.03158  39.4%     -    1s
H    0     0                       4.0000000    3.03158  24.2%     -    1s

Cutting planes:
  Clique: 48
  Zero half: 2

Explored 0 nodes (9922 simplex iterations) in 1.70 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%