Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:50 2013

Optimize a model with 16440 rows, 16040 columns and 64040 nonzeros
Presolve removed 1355 rows and 0 columns
Presolve time: 0.09s
Presolved: 15085 rows, 16040 columns, 61330 nonzeros
Variable types: 16000 continuous, 40 integer (40 binary)

Root relaxation: objective 4.295020e+04, 2580 iterations, 0.19 seconds

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

     0     0 42950.1962    0    3          - 42950.1962     -      -    0s
H    0     0                    43195.000000 42950.1962  0.57%     -    0s
H    0     0                    43187.000000 42950.1962  0.55%     -    0s
H    0     0                    42992.000000 42950.1962  0.10%     -    0s
     0     0 42950.4460    0    4 42992.0000 42950.4460  0.10%     -    0s
     0     0 42981.6111    0    2 42992.0000 42981.6111  0.02%     -    0s
H    0     0                    42988.000000 42981.6111  0.01%     -    0s
     0     0 42981.6111    0    2 42988.0000 42981.6111  0.01%     -    0s
     0     0     cutoff    0      42988.0000 42988.0000   0.0%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (3262 simplex iterations) in 0.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.298800000000e+04, best bound 4.298800000000e+04, gap 0.0%