Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:22:44 2013 Optimize a model with 2800 rows, 126500 columns and 401500 nonzeros Presolve removed 100 rows and 5700 columns Presolve time: 0.54s Presolved: 2700 rows, 120800 columns, 381500 nonzeros Variable types: 120100 continuous, 700 integer (700 binary) Root relaxation: objective 7.672886e+05, 5814 iterations, 0.52 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 12 - 767288.564 - - 1s 0 0 767326.495 0 8 - 767326.495 - - 1s 0 0 767326.495 0 8 - 767326.495 - - 2s 0 0 767326.495 0 8 - 767326.495 - - 2s 0 0 767326.495 0 8 - 767326.495 - - 3s 0 0 767326.495 0 8 - 767326.495 - - 3s 0 0 767326.495 0 8 - 767326.495 - - 4s 0 0 767326.495 0 8 - 767326.495 - - 5s H 0 0 781346.42761 767326.495 1.79% - 6s 0 2 767335.589 0 8 781346.428 767335.589 1.79% - 6s 21 22 768300.284 19 4 781346.428 767511.748 1.77% 81.2 10s H 27 5 768355.32084 767511.748 0.11% 64.5 10s 93 17 768150.588 5 10 768355.321 768071.200 0.04% 49.0 15s H 136 11 768348.85148 768235.450 0.01% 35.8 15s Cutting planes: Flow cover: 7 Explored 145 nodes (13860 simplex iterations) in 16.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683488514786e+05, best bound 7.682886474121e+05, gap 0.0078%