Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:24:10 2013 Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.41s Presolved: 3500 rows, 104200 columns, 212400 nonzeros Variable types: 102200 continuous, 2000 integer (2000 binary) Root relaxation: objective 8.654105e+05, 8572 iterations, 0.67 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 4 - 865410.545 - - 1s H 0 0 983809.60150 865410.545 12.0% - 1s H 0 0 925811.77561 865410.545 6.52% - 2s 0 0 865463.744 0 4 925811.776 865463.744 6.52% - 3s 0 0 865495.524 0 4 925811.776 865495.524 6.51% - 3s 0 0 865512.545 0 4 925811.776 865512.545 6.51% - 3s 0 0 865518.848 0 4 925811.776 865518.848 6.51% - 3s 0 0 865518.848 0 4 925811.776 865518.848 6.51% - 4s 0 0 865519.528 0 4 925811.776 865519.528 6.51% - 4s 0 0 865524.113 0 4 925811.776 865524.113 6.51% - 5s 0 0 865524.113 0 4 925811.776 865524.113 6.51% - 5s 0 0 865526.688 0 4 925811.776 865526.688 6.51% - 5s 0 0 865528.702 0 4 925811.776 865528.702 6.51% - 6s 0 0 865529.113 0 4 925811.776 865529.113 6.51% - 6s 0 0 865529.706 0 4 925811.776 865529.706 6.51% - 6s 0 0 865530.234 0 4 925811.776 865530.234 6.51% - 7s 0 0 865530.234 0 4 925811.776 865530.234 6.51% - 7s 0 2 865530.234 0 4 925811.776 865530.234 6.51% - 7s 4 6 866550.441 2 4 925811.776 866550.441 6.40% 821 10s 25 27 873021.285 13 2 925811.776 866564.739 6.40% 346 15s H 27 15 868218.11345 866564.739 0.19% 322 15s * 30 10 16 867835.85010 866564.739 0.15% 292 15s H 55 9 867695.96650 866599.521 0.13% 193 16s * 72 2 13 866849.82663 866599.521 0.03% 150 17s Cutting planes: Implied bound: 5 Flow cover: 19 Explored 84 nodes (23750 simplex iterations) in 17.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668498266279e+05, best bound 8.667678565254e+05, gap 0.0095%