Gurobi 5.0.1 (linux64) logging started Sun Dec 23 02:17:20 2012 Optimize a model with 22802 rows, 22801 columns and 102655 nonzeros Presolve removed 21194 rows and 13527 columns Presolve time: 0.34s Presolved: 1608 rows, 9274 columns, 22286 nonzeros Variable types: 138 continuous, 9136 integer (9136 binary) Root relaxation: objective 7.732880e+02, 561 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 773.28804 0 175 - 773.28804 - - 0s 0 0 811.11765 0 118 - 811.11765 - - 0s 0 0 815.31250 0 172 - 815.31250 - - 0s 0 0 816.19335 0 128 - 816.19335 - - 0s 0 0 817.01949 0 133 - 817.01949 - - 0s 0 0 817.21949 0 129 - 817.21949 - - 0s 0 0 817.50154 0 199 - 817.50154 - - 0s 0 0 817.88616 0 134 - 817.88616 - - 0s 0 0 817.88616 0 137 - 817.88616 - - 0s 0 0 817.88616 0 98 - 817.88616 - - 0s 0 0 817.88616 0 87 - 817.88616 - - 0s 0 0 817.88616 0 104 - 817.88616 - - 0s 0 0 817.90242 0 176 - 817.90242 - - 0s 0 0 817.90242 0 176 - 817.90242 - - 0s 0 2 818.12310 0 174 - 818.12310 - - 1s 603 398 824.53509 13 195 - 821.93750 - 10.7 6s 607 401 839.67500 24 60 - 824.03704 - 10.6 10s 613 405 839.09115 38 29 - 824.98908 - 10.5 15s 620 410 855.03480 51 22 - 826.00214 - 10.4 20s H 622 390 853.0000000 826.00518 3.16% 10.3 21s H 622 370 847.0000000 826.00518 2.48% 10.3 21s H 704 388 845.0000000 827.73150 2.04% 15.9 22s H 731 352 835.0000000 827.85534 0.86% 16.2 22s H 785 280 832.0000000 828.72104 0.39% 16.0 23s Cutting planes: Learned: 11 Gomory: 34 Cover: 19 Implied bound: 19 Clique: 8 MIR: 78 GUB cover: 6 Zero half: 29 Explored 841 nodes (15361 simplex iterations) in 23.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.320000000000e+02, best bound 8.320000000000e+02, gap 0.0%