Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:03:00 2013

Optimize a model with 549 rows, 5090 columns and 205413 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.53s
Presolved: 547 rows, 5088 columns, 205305 nonzeros
Variable types: 0 continuous, 5088 integer (5088 binary)
Found heuristic solution: objective 3809.0000000
Found heuristic solution: objective 2896.0000000

Root relaxation: objective 1.968000e+03, 962 iterations, 0.10 seconds

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

     0     0 1968.00000    0   39 2896.00000 1968.00000  32.0%     -    0s
H    0     0                    2032.0000000 1968.00000  3.15%     -    0s
     0     0 1977.07407    0   54 2032.00000 1977.07407  2.70%     -    1s
H    0     0                    2024.0000000 1977.07407  2.32%     -    1s
     0     0 1977.07407    0   34 2024.00000 1977.07407  2.32%     -    1s
H    0     0                    1988.0000000 1977.07407  0.55%     -    1s
H    0     0                    1980.0000000 1977.07407  0.15%     -    1s
*    0     0               0    1978.0000000 1978.00000   0.0%     -    1s

Cutting planes:
  Gomory: 2
  Clique: 9
  Zero half: 17

Explored 0 nodes (2462 simplex iterations) in 1.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.978000000000e+03, best bound 1.978000000000e+03, gap 0.0%