Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:08:38 2012 Optimize a model with 339 rows, 254 columns and 1099 nonzeros Presolve time: 0.00s Presolved: 339 rows, 254 columns, 1099 nonzeros Variable types: 0 continuous, 254 integer (254 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 0.000000e+00, 112 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 85 71.00000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.57529 0 87 56.00000 0.57529 99.0% - 0s 0 0 0.62081 0 87 56.00000 0.62081 98.9% - 0s 0 0 0.72957 0 88 56.00000 0.72957 98.7% - 0s 0 0 0.79134 0 94 56.00000 0.79134 98.6% - 0s H 0 0 53.0000000 0.79134 98.5% - 0s 0 0 0.81642 0 91 53.00000 0.81642 98.5% - 0s H 0 0 50.0000000 0.81642 98.4% - 0s 0 0 0.81708 0 88 50.00000 0.81708 98.4% - 0s 0 0 0.83246 0 96 50.00000 0.83246 98.3% - 0s 0 0 0.84795 0 93 50.00000 0.84795 98.3% - 0s 0 0 0.85687 0 93 50.00000 0.85687 98.3% - 0s 0 2 0.86632 0 93 50.00000 0.86632 98.3% - 0s * 44 41 25 40.0000000 2.80814 93.0% 28.6 0s H 81 64 38.0000000 2.81996 92.6% 25.5 0s * 82 55 25 37.0000000 2.81996 92.4% 25.4 0s * 113 70 20 34.0000000 5.61194 83.5% 24.1 0s * 200 117 17 32.0000000 10.15789 68.3% 23.7 0s * 674 256 26 31.0000000 15.54286 49.9% 21.6 0s * 729 265 27 30.0000000 15.54286 48.2% 22.0 0s Explored 4019 nodes (87835 simplex iterations) in 3.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%