Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:22:15 2013

Optimize a model with 2400 rows, 107100 columns and 233100 nonzeros
Presolve removed 100 rows and 2500 columns
Presolve time: 0.25s
Presolved: 2300 rows, 104600 columns, 229100 nonzeros
Variable types: 104100 continuous, 500 integer (500 binary)

Root relaxation: objective 9.188392e+05, 7547 iterations, 0.51 seconds

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

     0     0 918839.221    0   12          - 918839.221     -      -    0s
     0     0 918947.262    0   12          - 918947.262     -      -    1s
     0     0 918992.198    0   12          - 918992.198     -      -    1s
     0     0 918998.725    0    9          - 918998.725     -      -    1s
     0     0 918999.171    0    9          - 918999.171     -      -    2s
     0     0 918999.317    0    6          - 918999.317     -      -    2s
     0     0 918999.317    0    6          - 918999.317     -      -    2s
     0     0 918999.927    0    6          - 918999.927     -      -    3s
     0     0 918999.927    0    6          - 918999.927     -      -    4s
H    0     0                    943047.34676 918999.927  2.55%     -    4s
     0     2 919005.388    0    6 943047.347 919005.388  2.55%     -    5s
H   27    17                    920345.68263 919051.112  0.14%  88.4    9s
    45    21 919430.473   42    3 920345.683 919051.112  0.14%  54.3   10s
H  108    20                    919371.65559 919059.008  0.03%  29.0   14s
   115    23 919308.040   15    1 919371.656 919059.008  0.03%  28.0   15s

Cutting planes:
  Flow cover: 17

Explored 143 nodes (14301 simplex iterations) in 16.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.193716555880e+05, best bound 9.192842681540e+05, gap 0.0095%