Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:04 2013 Optimize a model with 560 rows, 9300 columns and 48300 nonzeros Presolve removed 20 rows and 1140 columns Presolve time: 0.06s Presolved: 540 rows, 8160 columns, 44300 nonzeros Variable types: 8020 continuous, 140 integer (140 binary) Root relaxation: objective 4.370285e+04, 633 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 8 - 43702.8549 - - 0s 0 0 43705.8432 0 8 - 43705.8432 - - 0s 0 0 43705.9495 0 8 - 43705.9495 - - 0s 0 0 43706.0296 0 8 - 43706.0296 - - 0s 0 0 43706.0296 0 8 - 43706.0296 - - 0s 0 0 43706.0758 0 8 - 43706.0758 - - 0s 0 0 43706.0758 0 8 - 43706.0758 - - 0s 0 0 43706.1065 0 8 - 43706.1065 - - 0s 0 0 43706.1065 0 8 - 43706.1065 - - 0s H 0 0 48684.882678 43706.1065 10.2% - 0s 0 2 43712.9132 0 8 48684.8827 43712.9132 10.2% - 0s * 19 15 18 44101.245142 43839.0806 0.59% 15.2 1s * 46 22 16 44068.085999 43853.2575 0.49% 11.6 1s * 49 19 15 44067.428751 43853.2575 0.49% 11.0 1s * 58 15 11 44052.801317 43878.1718 0.40% 10.1 1s * 76 15 16 43935.307043 43878.8765 0.13% 8.8 1s * 103 3 9 43902.138219 43900.8495 0.00% 7.1 1s Cutting planes: Flow cover: 10 Explored 104 nodes (1806 simplex iterations) in 1.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390213821896e+04, best bound 4.390084951135e+04, gap 0.0029%