Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:32:16 2013 Optimize a model with 6600 rows, 110300 columns and 235500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.79s Presolved: 6500 rows, 110200 columns, 230400 nonzeros Variable types: 105200 continuous, 5000 integer (5000 binary) Root relaxation: objective 9.188392e+05, 8268 iterations, 0.83 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 8 - 918839.221 - - 1s 0 0 918948.230 0 8 - 918948.230 - - 3s 0 0 918964.250 0 6 - 918964.250 - - 4s 0 0 918969.079 0 6 - 918969.079 - - 4s 0 0 918969.079 0 6 - 918969.079 - - 4s 0 0 918969.851 0 6 - 918969.851 - - 5s 0 0 918969.943 0 6 - 918969.943 - - 5s 0 0 918969.943 0 6 - 918969.943 - - 6s 0 0 918970.627 0 6 - 918970.627 - - 6s 0 0 918970.627 0 6 - 918970.627 - - 7s 0 0 918970.627 0 6 - 918970.627 - - 7s 0 0 918970.672 0 6 - 918970.672 - - 8s 0 0 918970.763 0 6 - 918970.763 - - 8s 0 0 918970.914 0 6 - 918970.914 - - 9s 0 0 918970.914 0 6 - 918970.914 - - 10s H 0 0 962669.05093 918970.914 4.54% - 11s 0 2 918970.914 0 6 962669.051 918970.914 4.54% - 11s 8 10 919284.268 4 2 962669.051 919211.334 4.51% 352 15s 25 27 925947.793 13 4 962669.051 919211.334 4.51% 325 20s H 27 27 956385.30200 919211.334 3.89% 301 21s 42 44 919687.875 21 2 956385.302 919211.334 3.89% 288 25s H 54 26 924748.87432 919211.334 0.60% 265 27s 77 23 920060.457 49 2 924748.874 919211.334 0.60% 192 30s 114 23 920223.469 84 2 924748.874 919211.334 0.60% 135 35s 151 24 920343.718 114 2 924748.874 919211.334 0.60% 111 40s 183 25 920472.423 143 2 924748.874 919211.334 0.60% 96.5 45s 217 26 920648.732 174 2 924748.874 919211.334 0.60% 84.7 50s 249 28 920841.716 204 2 924748.874 919211.334 0.60% 76.1 55s 285 30 923713.861 238 2 924748.874 919211.334 0.60% 68.9 60s 315 32 921282.626 266 2 924748.874 919211.334 0.60% 63.7 65s * 321 21 272 922575.91688 919211.334 0.36% 62.9 66s 344 23 921460.085 292 2 922575.917 919211.334 0.36% 60.5 70s 375 23 921736.036 323 2 922575.917 919211.334 0.36% 57.1 75s 404 23 922049.530 352 2 922575.917 919211.334 0.36% 54.0 80s 440 23 922522.825 388 4 922575.917 919211.334 0.36% 51.1 85s H 487 30 922573.55463 919211.334 0.36% 52.1 89s 495 32 921996.221 33 2 922573.555 919211.334 0.36% 51.8 90s H 517 5 919372.82014 919224.484 0.02% 50.3 91s Cutting planes: Implied bound: 29 Flow cover: 21 Explored 523 nodes (40265 simplex iterations) in 91.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193728201368e+05, best bound 9.192815034376e+05, gap 0.0099%