Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:49:40 2013 Optimize a model with 2200 rows, 101700 columns and 207600 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.34s Presolved: 2100 rows, 101600 columns, 206500 nonzeros Variable types: 101200 continuous, 400 integer (400 binary) Root relaxation: objective 9.053666e+05, 5632 iterations, 0.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 6 - 905366.638 - - 1s H 0 0 1029085.9837 905366.638 12.0% - 1s H 0 0 924673.13080 905366.638 2.09% - 1s 0 0 905394.038 0 6 924673.131 905394.038 2.08% - 2s 0 0 905447.444 0 6 924673.131 905447.444 2.08% - 2s 0 0 905448.317 0 6 924673.131 905448.317 2.08% - 3s 0 0 905448.317 0 6 924673.131 905448.317 2.08% - 3s 0 0 905456.191 0 6 924673.131 905456.191 2.08% - 4s 0 0 905456.191 0 6 924673.131 905456.191 2.08% - 4s 0 0 905457.724 0 6 924673.131 905457.724 2.08% - 4s 0 0 905460.050 0 6 924673.131 905460.050 2.08% - 5s 0 0 905461.076 0 6 924673.131 905461.076 2.08% - 5s 0 0 905462.195 0 6 924673.131 905462.195 2.08% - 5s 0 0 905463.127 0 6 924673.131 905463.127 2.08% - 6s 0 0 905463.127 0 6 924673.131 905463.127 2.08% - 7s H 0 0 909956.07103 905463.127 0.49% - 8s 0 2 905463.127 0 6 909956.071 905463.127 0.49% - 9s 2 4 906237.679 2 3 909956.071 906237.679 0.41% 381 10s 18 11 907970.617 18 3 909956.071 906281.749 0.40% 89.1 15s * 21 7 21 908006.29248 906281.749 0.19% 78.0 15s 29 8 907401.443 7 3 908006.292 906862.471 0.13% 101 20s Cutting planes: Flow cover: 18 Explored 67 nodes (14578 simplex iterations) in 23.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080062924750e+05, best bound 9.079723940132e+05, gap 0.0037%