Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:14:24 2013 Optimize a model with 3000 rows, 121100 columns and 402800 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.74s Presolved: 2900 rows, 121000 columns, 382700 nonzeros Variable types: 120200 continuous, 800 integer (800 binary) Root relaxation: objective 7.543716e+05, 6383 iterations, 0.80 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 - - 1s 0 0 754395.097 0 9 - 754395.097 - - 2s 0 0 754414.647 0 16 - 754414.647 - - 3s 0 0 754418.940 0 13 - 754418.940 - - 3s 0 0 754421.631 0 14 - 754421.631 - - 4s 0 0 754422.943 0 14 - 754422.943 - - 4s 0 0 754424.633 0 14 - 754424.633 - - 5s 0 0 754425.811 0 14 - 754425.811 - - 5s 0 0 754426.192 0 15 - 754426.192 - - 6s 0 0 754427.122 0 15 - 754427.122 - - 6s 0 0 754427.332 0 15 - 754427.332 - - 7s 0 0 754427.514 0 18 - 754427.514 - - 8s 0 0 754427.514 0 18 - 754427.514 - - 11s H 0 0 758017.73421 754427.514 0.47% - 11s 0 2 754430.753 0 18 758017.734 754430.753 0.47% - 12s 6 8 755070.021 5 3 758017.734 754661.443 0.44% 265 15s 31 20 755474.075 30 3 758017.734 754661.443 0.44% 64.3 20s 61 23 756189.434 60 3 758017.734 754661.443 0.44% 39.3 25s 102 32 757301.196 101 1 758017.734 754661.443 0.44% 28.0 30s 161 47 757851.604 160 1 758017.734 754661.443 0.44% 19.4 35s 230 90 756891.488 44 6 758017.734 754686.465 0.44% 22.2 40s 306 149 755605.736 34 3 758017.734 754769.728 0.43% 24.1 45s H 326 50 755699.60816 754769.728 0.12% 22.9 48s 342 52 755598.968 5 3 755699.608 754827.062 0.12% 25.9 50s 398 36 cutoff 7 755699.608 755222.668 0.06% 33.9 55s Cutting planes: Flow cover: 22 Explored 446 nodes (23982 simplex iterations) in 57.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556996081564e+05, best bound 7.556324265088e+05, gap 0.0089%