Gurobi 5.0.1 (linux64) logging started Wed Apr 24 14:58:22 2013 Optimize a model with 3300 rows, 900300 columns and 1800300 nonzeros Presolve removed 0 rows and 0 columns (presolve time = 5s) ... Presolve time: 6.44s Presolved: 3300 rows, 900300 columns, 1800300 nonzeros Variable types: 900000 continuous, 300 integer (300 binary) Starting sifting (using dual simplex for sub-problems)... Iter Pivots Primal Obj Dual Obj Time 0 0 infinity 5.3112000e+04 0s 1 14129 1.6588000e+10 6.7721583e+04 0s 2 23684 1.2944628e+08 6.9169534e+04 1s 3 31898 1.3629357e+06 7.6651461e+04 1s 4 43329 9.2221580e+05 1.2316726e+05 1s 5 55991 8.4781177e+05 2.6704633e+05 1s 6 67719 8.2558681e+05 4.4031424e+05 2s 7 77243 8.2281528e+05 7.2028021e+05 2s 8 85975 8.2232655e+05 7.5567900e+05 2s 9 93913 8.1772593e+05 8.0792482e+05 3s 10 99484 8.1690937e+05 8.0959414e+05 3s 11 104158 8.1652161e+05 8.1566060e+05 3s Sifting complete Root relaxation: objective 8.165216e+05, 108270 iterations, 3.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 816521.614 0 5 - 816521.614 - - 10s H 0 0 890083.00000 816521.614 8.26% - 13s 0 0 816734.347 0 4 890083.000 816734.347 8.24% - 20s H 0 0 871552.53698 816734.347 6.29% - 20s H 0 0 870042.00000 816734.347 6.13% - 21s 0 0 816796.885 0 5 870042.000 816796.885 6.12% - 24s 0 0 816812.699 0 6 870042.000 816812.699 6.12% - 27s 0 0 816819.132 0 5 870042.000 816819.132 6.12% - 29s H 0 0 868812.00000 816819.132 5.98% - 30s 0 0 816821.808 0 3 868812.000 816821.808 5.98% - 31s H 0 0 863179.31129 816821.808 5.37% - 32s H 0 0 861851.00000 816821.808 5.22% - 32s 0 0 816821.808 0 3 861851.000 816821.808 5.22% - 34s 0 0 816821.808 0 3 861851.000 816821.808 5.22% - 36s 0 0 816821.808 0 3 861851.000 816821.808 5.22% - 38s 0 0 816821.821 0 2 861851.000 816821.821 5.22% - 41s H 0 0 832784.82662 816821.821 1.92% - 41s H 0 0 831991.00000 816821.821 1.82% - 41s 0 0 816821.821 0 2 831991.000 816821.821 1.82% - 43s 0 0 816821.821 0 5 831991.000 816821.821 1.82% - 53s 0 0 816821.821 0 4 831991.000 816821.821 1.82% - 58s 0 0 816821.821 0 5 831991.000 816821.821 1.82% - 60s 0 0 816821.821 0 5 831991.000 816821.821 1.82% - 62s 0 0 816821.821 0 5 831991.000 816821.821 1.82% - 64s 0 0 816821.821 0 5 831991.000 816821.821 1.82% - 65s 0 0 816821.821 0 3 831991.000 816821.821 1.82% - 67s 0 0 816821.821 0 3 831991.000 816821.821 1.82% - 68s 0 0 816821.821 0 3 831991.000 816821.821 1.82% - 69s 0 0 816821.821 0 3 831991.000 816821.821 1.82% - 71s 0 0 816821.821 0 2 831991.000 816821.821 1.82% - 73s H 0 0 819055.00000 816821.821 0.27% - 79s 0 2 816870.233 0 2 819055.000 816870.233 0.27% - 81s 2 4 817224.547 1 6 819055.000 817224.547 0.22% 586 86s 8 10 817324.118 7 1 819055.000 817302.701 0.21% 237 90s 14 16 817422.883 12 2 819055.000 817302.701 0.21% 188 95s H 18 12 817737.00000 817302.701 0.05% 165 98s H 21 10 817693.00000 817302.701 0.05% 145 98s H 22 10 817674.00000 817302.701 0.05% 139 98s * 23 10 21 817651.00000 817302.701 0.04% 133 99s 24 11 817313.035 2 1 817651.000 817313.035 0.04% 142 100s * 29 7 7 817465.00000 817313.035 0.02% 134 103s 34 3 cutoff 3 817465.000 817379.471 0.01% 138 105s Cutting planes: Implied bound: 122 Flow cover: 2 Explored 37 nodes (134145 simplex iterations) in 106.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.174650000000e+05, best bound 8.173860683761e+05, gap 0.0097%