Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:57:25 2012 Optimize a model with 337 rows, 223 columns and 1063 nonzeros Presolve time: 0.00s Presolved: 337 rows, 223 columns, 1063 nonzeros Variable types: 0 continuous, 223 integer (223 binary) Found heuristic solution: objective 86.0000000 Found heuristic solution: objective 84.0000000 Root relaxation: objective 0.000000e+00, 85 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 55 84.00000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s 0 0 0.70843 0 57 60.00000 0.70843 98.8% - 0s 0 0 0.71273 0 57 60.00000 0.71273 98.8% - 0s 0 0 0.76296 0 66 60.00000 0.76296 98.7% - 0s H 0 0 56.0000000 0.76296 98.6% - 0s 0 0 0.78508 0 63 56.00000 0.78508 98.6% - 0s 0 0 0.79418 0 57 56.00000 0.79418 98.6% - 0s 0 0 0.79418 0 57 56.00000 0.79418 98.6% - 0s 0 0 0.79418 0 57 56.00000 0.79418 98.6% - 0s 0 2 0.81036 0 57 56.00000 0.81036 98.6% - 0s * 36 36 20 52.0000000 3.66791 92.9% 31.0 0s * 75 62 20 50.0000000 3.84575 92.3% 26.3 0s * 114 91 24 49.0000000 7.54567 84.6% 24.3 0s * 152 116 16 47.0000000 7.57294 83.9% 24.4 0s * 156 112 17 46.0000000 7.57294 83.5% 24.0 0s * 273 188 17 45.0000000 13.86957 69.2% 23.9 0s * 546 283 16 44.0000000 19.17391 56.4% 21.9 0s * 897 398 27 43.0000000 21.40000 50.2% 24.3 0s H 935 394 42.0000000 21.40000 49.0% 24.7 0s * 936 375 25 41.0000000 21.40000 47.8% 24.7 0s * 1996 314 24 40.0000000 26.12000 34.7% 23.9 1s Explored 4842 nodes (103516 simplex iterations) in 3.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%