Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:26 2012 Optimize a model with 532 rows, 141 columns and 1064 nonzeros Presolve removed 117 rows and 0 columns Presolve time: 0.00s Presolved: 415 rows, 141 columns, 903 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.815789e+01, 251 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.15789 0 136 44.00000 58.15789 32.2% - 0s H 0 0 48.0000000 58.15789 21.2% - 0s 0 0 57.25940 0 136 48.00000 57.25940 19.3% - 0s H 0 0 49.0000000 57.25940 16.9% - 0s 0 0 56.67380 0 136 49.00000 56.67380 15.7% - 0s 0 0 56.60728 0 136 49.00000 56.60728 15.5% - 0s H 0 0 50.0000000 56.60728 13.2% - 0s 0 0 56.34248 0 138 50.00000 56.34248 12.7% - 0s 0 0 56.12653 0 138 50.00000 56.12653 12.3% - 0s 0 0 55.98413 0 135 50.00000 55.98413 12.0% - 0s 0 0 55.91280 0 139 50.00000 55.91280 11.8% - 0s 0 0 55.78825 0 138 50.00000 55.78825 11.6% - 0s 0 0 55.63046 0 141 50.00000 55.63046 11.3% - 0s 0 0 55.51758 0 138 50.00000 55.51758 11.0% - 0s 0 0 55.42399 0 134 50.00000 55.42399 10.8% - 0s 0 0 55.33376 0 137 50.00000 55.33376 10.7% - 0s 0 0 55.29762 0 140 50.00000 55.29762 10.6% - 0s 0 0 55.23214 0 138 50.00000 55.23214 10.5% - 0s 0 0 55.21106 0 141 50.00000 55.21106 10.4% - 0s 0 0 55.21106 0 138 50.00000 55.21106 10.4% - 0s 0 2 55.20902 0 138 50.00000 55.20902 10.4% - 0s * 18 7 10 51.0000000 55.20140 8.24% 26.1 0s * 184 6 7 52.0000000 53.39130 2.68% 30.8 0s Cutting planes: Zero half: 96 Explored 191 nodes (6913 simplex iterations) in 0.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%