Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:31:41 2013 Optimize a model with 2400 rows, 102800 columns and 215900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.25s Presolved: 2300 rows, 102700 columns, 213800 nonzeros Variable types: 102200 continuous, 500 integer (500 binary) Root relaxation: objective 7.543716e+05, 5931 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 12 - 754371.571 - - 0s H 0 0 982042.73564 754371.571 23.2% - 1s 0 0 754448.080 0 12 982042.736 754448.080 23.2% - 1s H 0 0 757433.81826 754448.080 0.39% - 1s 0 0 754483.007 0 6 757433.818 754483.007 0.39% - 1s 0 0 754498.501 0 12 757433.818 754498.501 0.39% - 2s 0 0 754503.524 0 9 757433.818 754503.524 0.39% - 2s 0 0 754505.451 0 12 757433.818 754505.451 0.39% - 2s 0 0 754507.424 0 12 757433.818 754507.424 0.39% - 2s 0 0 754510.436 0 13 757433.818 754510.436 0.39% - 3s 0 0 754510.835 0 14 757433.818 754510.835 0.39% - 3s 0 0 754511.250 0 14 757433.818 754511.250 0.39% - 3s 0 0 754511.681 0 14 757433.818 754511.681 0.39% - 3s 0 0 754511.681 0 14 757433.818 754511.681 0.39% - 5s 0 2 754540.094 0 14 757433.818 754540.094 0.38% - 5s 24 19 755474.075 23 3 757433.818 754730.494 0.36% 104 10s 45 23 756017.955 44 3 757433.818 754730.494 0.36% 64.0 15s 68 27 756676.731 67 1 757433.818 754730.494 0.36% 47.5 20s H 81 28 757061.46447 754730.494 0.31% 40.9 21s 114 48 755600.988 25 3 757061.464 754769.728 0.30% 41.2 25s * 127 34 37 755679.58081 754769.728 0.12% 37.9 26s 156 34 cutoff 5 755679.581 754930.589 0.10% 48.3 30s 199 18 755533.733 6 3 755679.581 755426.607 0.03% 55.1 35s Cutting planes: Flow cover: 33 Explored 212 nodes (19301 simplex iterations) in 35.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556795808113e+05, best bound 7.556138789801e+05, gap 0.0087%