Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:24:33 2013 Optimize a model with 1600 rows, 100800 columns and 201700 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.27s Presolved: 1400 rows, 100500 columns, 201000 nonzeros Variable types: 100400 continuous, 100 integer (100 binary) Root relaxation: objective 7.543716e+05, 6362 iterations, 0.50 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 769316.28576 754371.571 1.94% - 1s 0 0 754447.165 0 4 769316.286 754447.165 1.93% - 1s H 0 0 756924.20823 754447.165 0.33% - 2s 0 0 754482.373 0 3 756924.208 754482.373 0.32% - 2s 0 0 754506.512 0 5 756924.208 754506.512 0.32% - 2s 0 0 754517.151 0 4 756924.208 754517.151 0.32% - 2s 0 0 754518.426 0 4 756924.208 754518.426 0.32% - 2s 0 0 754519.091 0 4 756924.208 754519.091 0.32% - 3s 0 0 754520.769 0 4 756924.208 754520.769 0.32% - 3s 0 0 754521.855 0 4 756924.208 754521.855 0.32% - 3s 0 0 754524.945 0 4 756924.208 754524.945 0.32% - 3s 0 0 754525.315 0 4 756924.208 754525.315 0.32% - 4s 0 0 754525.611 0 4 756924.208 754525.611 0.32% - 4s 0 0 754525.668 0 4 756924.208 754525.668 0.32% - 4s 0 0 754525.668 0 4 756924.208 754525.668 0.32% - 5s 0 2 754526.728 0 4 756924.208 754526.728 0.32% - 5s * 16 10 14 755652.87336 754770.421 0.12% 84.3 7s * 30 12 13 755409.65326 754782.956 0.08% 86.0 8s 42 5 755393.683 5 1 755409.653 755204.760 0.03% 87.4 10s Cutting planes: Flow cover: 36 Explored 46 nodes (11513 simplex iterations) in 10.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.554096532555e+05, best bound 7.553544095102e+05, gap 0.0073%