Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:33:22 2013

Optimize a model with 1083 rows, 23421 columns and 940428 nonzeros
Presolve removed 40 rows and 221 columns (presolve time = 5s) ...
Presolve removed 40 rows and 221 columns
Presolve time: 5.07s
Presolved: 1043 rows, 23200 columns, 931288 nonzeros
Variable types: 0 continuous, 23200 integer (23200 binary)
Found heuristic solution: objective 13320.000000

Root relaxation: objective 7.674667e+03, 5487 iterations, 2.30 seconds

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

     0     0 7674.66667    0   88 13320.0000 7674.66667  42.4%     -    7s
H    0     0                    7718.0000000 7674.66667  0.56%     -    9s
     0     0 7678.00000    0   40 7718.00000 7678.00000  0.52%     -   10s
H    0     0                    7712.0000000 7678.00000  0.44%     -   14s
     0     0 7678.00000    0   44 7712.00000 7678.00000  0.44%     -   15s
     0     0 7678.00000    0  105 7712.00000 7678.00000  0.44%     -   15s
H    0     0                    7706.0000000 7678.00000  0.36%     -   15s
H    0     0                    7704.0000000 7678.00000  0.34%     -   15s
     0     0 7680.00000    0   66 7704.00000 7680.00000  0.31%     -   16s
H    0     0                    7690.0000000 7680.00000  0.13%     -   16s
     0     1 7680.20000    0   66 7690.00000 7680.20000  0.13%     -   18s
     2     2 7680.20000    0   40 7690.00000 7680.20000  0.13%  66.5   23s
     5     4 7682.00000    0   60 7690.00000 7682.00000  0.10%  26.6   25s
*    5     3              12    7683.0000000 7683.00000   0.0%  26.6   25s

Cutting planes:
  Gomory: 2
  Clique: 8
  Zero half: 13

Explored 5 nodes (15131 simplex iterations) in 25.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.683000000000e+03, best bound 7.683000000000e+03, gap 0.0%