Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:42:51 2013 Optimize a model with 3000 rows, 152200 columns and 641700 nonzeros Presolve removed 100 rows and 11300 columns Presolve time: 0.75s Presolved: 2900 rows, 140900 columns, 601700 nonzeros Variable types: 140100 continuous, 800 integer (800 binary) Root relaxation: objective 7.672886e+05, 5842 iterations, 0.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 15 - 767288.564 - - 1s 0 0 767327.066 0 10 - 767327.066 - - 2s 0 0 767327.066 0 10 - 767327.066 - - 2s 0 0 767327.066 0 10 - 767327.066 - - 3s 0 0 767327.066 0 10 - 767327.066 - - 3s 0 0 767327.066 0 10 - 767327.066 - - 4s 0 0 767327.066 0 10 - 767327.066 - - 4s 0 0 767327.066 0 10 - 767327.066 - - 6s 0 2 767330.041 0 10 - 767330.041 - - 13s 7 9 768817.838 5 4 - 767412.246 - 202 15s 32 34 768206.193 28 7 - 767412.246 - 84.8 20s 63 65 768883.522 59 3 - 767412.246 - 66.5 25s 101 103 769403.633 97 7 - 767412.246 - 51.1 30s 144 146 769969.258 140 5 - 767412.246 - 43.8 35s 183 185 770732.168 179 5 - 767412.246 - 41.5 40s 227 229 772772.192 223 1 - 767412.246 - 39.3 45s 267 269 775097.164 263 4 - 767412.246 - 36.9 50s 324 326 786399.286 317 5 - 767412.246 - 35.1 55s 401 403 786691.120 392 5 - 767412.246 - 30.7 60s * 407 374 398 786692.78409 767412.246 2.45% 30.3 60s H 464 55 768391.15505 767442.437 0.12% 28.4 62s 530 85 768323.249 23 5 768391.155 767565.326 0.11% 29.0 65s * 533 69 26 768365.43687 767565.326 0.10% 28.9 65s 705 78 768356.344 26 5 768365.437 768039.424 0.04% 25.1 70s * 746 85 22 768362.22809 768056.312 0.04% 24.2 71s * 770 86 24 768358.62959 768066.634 0.04% 23.7 71s 894 72 768357.646 23 5 768358.630 768185.196 0.02% 21.7 75s H 928 66 768352.22482 768225.857 0.02% 21.4 76s Cutting planes: Flow cover: 9 Explored 981 nodes (29356 simplex iterations) in 77.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683522248183e+05, best bound 7.682763210932e+05, gap 0.0099%