Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:28 2013

Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros
Presolve removed 1739 rows and 1210 columns
Presolve time: 0.15s
Presolved: 17910 rows, 1191 columns, 54968 nonzeros
Variable types: 27 continuous, 1164 integer (1164 binary)
Found heuristic solution: objective 54805.000000

Root relaxation: objective 4.308592e+04, 12953 iterations, 0.87 seconds

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

     0     0 43085.9167    0    9 54805.0000 43085.9167  21.4%     -    1s
H    0     0                    43119.000000 43085.9167  0.08%     -    1s
H    0     0                    43109.000000 43085.9167  0.05%     -    1s
H    0     0                    43098.000000 43085.9167  0.03%     -    1s
     0     0 43085.9167    0   12 43098.0000 43085.9167  0.03%     -    1s
     0     0 43085.9167    0    4 43098.0000 43085.9167  0.03%     -    1s
H    0     0                    43097.000000 43085.9167  0.03%     -    1s
     0     0 43085.9167    0   11 43097.0000 43085.9167  0.03%     -    1s
     0     0 43085.9167    0   12 43097.0000 43085.9167  0.03%     -    1s
     0     0 43086.1264    0   20 43097.0000 43086.1264  0.03%     -    1s
     0     2 43088.3137    0   20 43097.0000 43088.3137  0.02%     -    1s
H   32    12                    43094.000000 43089.6667  0.01%  12.6    1s

Cutting planes:
  MIR: 6
  Zero half: 1

Explored 40 nodes (13745 simplex iterations) in 1.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.309400000000e+04, best bound 4.309100000000e+04, gap 0.0070%