Gurobi 5.0.1 (linux64) logging started Thu Nov 29 13:34:12 2012 Optimize a model with 29582 rows, 29241 columns and 174760 nonzeros Presolve removed 170 rows and 1 columns Presolve time: 0.42s Presolved: 29412 rows, 29240 columns, 174080 nonzeros Variable types: 170 continuous, 29070 integer (29070 binary) Found heuristic solution: objective 28703.000000 Found heuristic solution: objective 28638.000000 Root relaxation: objective 2.698472e+03, 1090 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2698.47220 0 76 28638.0000 2698.47220 90.6% - 2s 0 0 2717.01938 0 75 28638.0000 2717.01938 90.5% - 2s 0 0 2717.35271 0 79 28638.0000 2717.35271 90.5% - 3s 0 0 2720.01938 0 57 28638.0000 2720.01938 90.5% - 3s 0 0 2720.07263 0 66 28638.0000 2720.07263 90.5% - 4s 0 0 2720.09081 0 59 28638.0000 2720.09081 90.5% - 5s 0 0 2720.09081 0 59 28638.0000 2720.09081 90.5% - 6s 0 0 2720.09081 0 59 28638.0000 2720.09081 90.5% - 7s H 0 0 2833.0000000 2720.09081 3.99% - 8s H 0 0 2814.0000000 2720.09081 3.34% - 8s 0 0 2720.09081 0 83 2814.00000 2720.09081 3.34% - 9s 0 0 2720.09144 0 111 2814.00000 2720.09144 3.34% - 9s 0 0 2720.09144 0 117 2814.00000 2720.09144 3.34% - 9s 0 0 2720.09144 0 73 2814.00000 2720.09144 3.34% - 9s 0 0 2720.09144 0 66 2814.00000 2720.09144 3.34% - 10s 0 0 2720.09144 0 66 2814.00000 2720.09144 3.34% - 10s 0 0 2720.09144 0 68 2814.00000 2720.09144 3.34% - 10s 0 0 2720.09144 0 68 2814.00000 2720.09144 3.34% - 10s H 0 0 2763.0000000 2720.09144 1.55% - 12s 0 2 2720.16545 0 68 2763.00000 2720.16545 1.55% - 12s H 27 18 2758.0000000 2720.48235 1.36% 19.6 13s 123 49 2732.18316 24 158 2758.00000 2721.95621 1.31% 12.8 15s 510 255 2732.07206 14 116 2758.00000 2722.75810 1.28% 17.2 20s 632 324 2732.02873 26 58 2758.00000 2732.02873 0.94% 28.9 25s H 768 309 2755.0000000 2732.43385 0.82% 30.3 27s 1183 292 2741.40330 34 122 2755.00000 2734.50274 0.74% 36.6 30s 2152 259 2745.31890 29 136 2755.00000 2738.72678 0.59% 38.9 35s 2991 236 2743.87117 40 95 2755.00000 2743.37258 0.42% 41.1 40s 4220 48 cutoff 46 2755.00000 2752.00000 0.11% 38.3 45s Cutting planes: Learned: 1 Gomory: 60 Implied bound: 481 MIR: 89 Zero half: 16 Explored 4655 nodes (177681 simplex iterations) in 46.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.755000000000e+03, best bound 2.755000000000e+03, gap 0.0%