Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:30:25 2013 Optimize a model with 35459 rows, 34869 columns and 139299 nonzeros Presolve removed 1579 rows and 0 columns Presolve time: 0.20s Presolved: 33880 rows, 34869 columns, 136141 nonzeros Variable types: 34810 continuous, 59 integer (59 binary) Root relaxation: objective 6.313774e+04, 7523 iterations, 1.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63137.7379 0 6 - 63137.7379 - - 1s H 0 0 65180.000000 63137.7379 3.13% - 1s H 0 0 63829.000000 63137.7379 1.08% - 1s 0 0 63156.0933 0 7 63829.0000 63156.0933 1.05% - 1s 0 0 63156.1083 0 7 63829.0000 63156.1083 1.05% - 2s 0 0 63156.4278 0 7 63829.0000 63156.4278 1.05% - 2s 0 0 63156.4278 0 7 63829.0000 63156.4278 1.05% - 2s 0 2 63185.4209 0 7 63829.0000 63185.4209 1.01% - 3s H 8 8 63705.519481 63338.7329 0.58% 137 3s H 10 7 63640.000000 63338.7329 0.47% 141 3s H 12 8 63612.081081 63338.7329 0.43% 129 3s * 14 7 11 63588.000000 63338.7329 0.39% 120 3s H 19 8 63540.370370 63339.9783 0.32% 107 4s * 20 5 7 63459.000000 63339.9783 0.19% 107 4s Cutting planes: Gomory: 2 Flow cover: 8 Explored 26 nodes (10002 simplex iterations) in 4.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.345900000000e+04, best bound 6.345900000000e+04, gap 0.0%