Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:26:27 2013 Optimize a model with 2800 rows, 126500 columns and 401500 nonzeros Presolve removed 100 rows and 5700 columns Presolve time: 0.53s Presolved: 2700 rows, 120800 columns, 381500 nonzeros Variable types: 120100 continuous, 700 integer (700 binary) Root relaxation: objective 9.188392e+05, 6750 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 16 - 918839.221 - - 1s 0 0 918906.217 0 16 - 918906.217 - - 1s 0 0 918917.320 0 16 - 918917.320 - - 2s 0 0 918927.888 0 12 - 918927.888 - - 2s 0 0 918930.620 0 12 - 918930.620 - - 3s 0 0 918932.955 0 12 - 918932.955 - - 3s 0 0 918933.726 0 12 - 918933.726 - - 3s 0 0 918934.978 0 12 - 918934.978 - - 4s 0 0 918935.249 0 12 - 918935.249 - - 4s 0 0 918935.573 0 12 - 918935.573 - - 4s 0 0 918935.776 0 12 - 918935.776 - - 5s 0 0 918935.930 0 12 - 918935.930 - - 5s 0 0 918935.930 0 12 - 918935.930 - - 8s H 0 0 995905.22992 918935.930 7.73% - 8s 0 2 918941.359 0 12 995905.230 918941.359 7.73% - 9s 2 4 918967.962 2 11 995905.230 918967.962 7.73% 372 10s H 27 27 928269.28377 918996.129 1.00% 75.7 14s 29 31 919386.982 25 4 928269.284 918996.129 1.00% 71.8 15s 57 55 919654.144 52 6 928269.284 918996.129 1.00% 52.4 20s 78 67 920248.503 73 6 928269.284 918996.129 1.00% 42.9 25s 95 70 921215.583 90 5 928269.284 918996.129 1.00% 39.8 30s * 122 69 116 922675.93669 918996.129 0.40% 34.2 33s H 135 23 919373.45818 919003.522 0.04% 38.3 35s H 216 36 919373.12438 919195.237 0.02% 37.1 39s 243 35 919364.587 17 2 919373.124 919276.758 0.01% 34.3 40s Cutting planes: Flow cover: 31 Explored 253 nodes (18424 simplex iterations) in 40.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193731243770e+05, best bound 9.192838515078e+05, gap 0.0097%