Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:16 2012 Optimize a model with 551 rows, 149 columns and 1102 nonzeros Presolve removed 94 rows and 0 columns Presolve time: 0.00s Presolved: 457 rows, 149 columns, 970 nonzeros Variable types: 0 continuous, 149 integer (149 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 6.250000e+01, 228 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.50000 0 119 44.00000 62.50000 42.0% - 0s H 0 0 45.0000000 62.50000 38.9% - 0s 0 0 61.62500 0 144 45.00000 61.62500 36.9% - 0s 0 0 60.35714 0 138 45.00000 60.35714 34.1% - 0s 0 0 59.98037 0 148 45.00000 59.98037 33.3% - 0s 0 0 59.39662 0 145 45.00000 59.39662 32.0% - 0s 0 0 58.76327 0 148 45.00000 58.76327 30.6% - 0s H 0 0 46.0000000 58.76327 27.7% - 0s 0 0 58.54074 0 147 46.00000 58.54074 27.3% - 0s 0 0 58.43267 0 148 46.00000 58.43267 27.0% - 0s 0 0 58.29482 0 149 46.00000 58.29482 26.7% - 0s 0 0 58.15706 0 148 46.00000 58.15706 26.4% - 0s H 0 0 47.0000000 58.15706 23.7% - 0s 0 0 58.06828 0 147 47.00000 58.06828 23.5% - 0s 0 0 58.04792 0 147 47.00000 58.04792 23.5% - 0s 0 0 58.04792 0 144 47.00000 58.04792 23.5% - 0s H 0 0 48.0000000 58.04792 20.9% - 0s 0 2 58.04745 0 144 48.00000 58.04745 20.9% - 0s * 14 14 11 49.0000000 58.04252 18.5% 39.6 0s H 27 19 50.0000000 57.68304 15.4% 50.4 0s * 344 103 14 51.0000000 55.96795 9.74% 33.2 0s 615 171 54.17241 11 145 51.00000 55.24675 8.33% 30.4 5s Cutting planes: Zero half: 216 Explored 2566 nodes (76681 simplex iterations) in 8.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%