Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:53:24 2013 Optimize a model with 1900 rows, 101700 columns and 204100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.38s Presolved: 1700 rows, 101400 columns, 202800 nonzeros Variable types: 101000 continuous, 400 integer (400 binary) Root relaxation: objective 7.543716e+05, 7585 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 4 - 754371.571 - - 0s H 0 0 799636.19752 754371.571 5.66% - 1s H 0 0 757248.92496 754371.571 0.38% - 2s 0 0 754448.339 0 4 757248.925 754448.339 0.37% - 2s 0 0 754485.311 0 2 757248.925 754485.311 0.36% - 2s 0 0 754508.831 0 5 757248.925 754508.831 0.36% - 2s 0 0 754517.837 0 4 757248.925 754517.837 0.36% - 2s 0 0 754518.938 0 4 757248.925 754518.938 0.36% - 3s 0 0 754519.973 0 4 757248.925 754519.973 0.36% - 3s 0 0 754522.012 0 4 757248.925 754522.012 0.36% - 3s 0 0 754524.882 0 4 757248.925 754524.882 0.36% - 3s 0 0 754525.411 0 4 757248.925 754525.411 0.36% - 4s 0 0 754525.838 0 4 757248.925 754525.838 0.36% - 4s 0 0 754526.770 0 4 757248.925 754526.770 0.36% - 4s 0 0 754526.770 0 4 757248.925 754526.770 0.36% - 5s 0 2 754529.317 0 4 757248.925 754529.317 0.36% - 5s 54 14 755968.211 53 1 757248.925 754771.081 0.33% 40.9 10s H 77 9 756096.75618 754771.081 0.18% 29.3 10s H 104 20 756060.44872 754831.597 0.16% 34.8 11s 197 34 755747.390 5 1 756060.449 755178.411 0.12% 35.2 15s H 247 3 755674.17564 755600.988 0.01% 49.4 19s Cutting planes: Flow cover: 40 Explored 247 nodes (20996 simplex iterations) in 19.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556741756437e+05, best bound 7.556009880916e+05, gap 0.0097%