Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:25:08 2013

Optimize a model with 33117 rows, 32547 columns and 130017 nonzeros
Presolve removed 2017 rows and 0 columns
Presolve time: 0.18s
Presolved: 31100 rows, 32547 columns, 125983 nonzeros
Variable types: 32490 continuous, 57 integer (57 binary)

Root relaxation: objective 5.291086e+04, 4088 iterations, 0.49 seconds

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

     0     0 52910.8593    0    3          - 52910.8593     -      -    0s
H    0     0                    53192.000000 52910.8593  0.53%     -    0s
H    0     0                    53070.000000 52910.8593  0.30%     -    1s
     0     0 52920.4301    0    5 53070.0000 52920.4301  0.28%     -    1s
     0     0 52920.4301    0    5 53070.0000 52920.4301  0.28%     -    1s
     0     0 52937.9783    0    4 53070.0000 52937.9783  0.25%     -    1s
     0     0 52938.0213    0    4 53070.0000 52938.0213  0.25%     -    1s
     0     0 52938.0387    0    2 53070.0000 52938.0387  0.25%     -    1s
H    0     0                    53017.000000 52938.0387  0.15%     -    2s
     0     0 52968.1429    0    1 53017.0000 52968.1429  0.09%     -    2s
     0     0 52986.3523    0    2 53017.0000 52986.3523  0.06%     -    2s
     0     0 52992.0256    0    2 53017.0000 52992.0256  0.05%     -    2s
     0     0 52996.8673    0    2 53017.0000 52996.8673  0.04%     -    2s
     0     0 52996.8673    0    2 53017.0000 52996.8673  0.04%     -    2s

Cutting planes:
  Gomory: 4
  Flow cover: 1

Explored 0 nodes (5217 simplex iterations) in 2.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.301700000000e+04, best bound 5.301700000000e+04, gap 0.0%