Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:16 2012 Optimize a model with 529 rows, 145 columns and 1058 nonzeros Presolve removed 101 rows and 0 columns Presolve time: 0.00s Presolved: 428 rows, 145 columns, 918 nonzeros Variable types: 0 continuous, 145 integer (145 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 5.998361e+01, 269 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.98361 0 140 50.00000 59.98361 20.0% - 0s 0 0 59.62864 0 142 50.00000 59.62864 19.3% - 0s H 0 0 51.0000000 59.62864 16.9% - 0s 0 0 59.29289 0 143 51.00000 59.29289 16.3% - 0s 0 0 58.64626 0 144 51.00000 58.64626 15.0% - 0s 0 0 58.46389 0 144 51.00000 58.46389 14.6% - 0s 0 0 58.32000 0 144 51.00000 58.32000 14.4% - 0s 0 0 58.08631 0 144 51.00000 58.08631 13.9% - 0s 0 0 57.92831 0 143 51.00000 57.92831 13.6% - 0s 0 0 57.83563 0 144 51.00000 57.83563 13.4% - 0s 0 0 57.51948 0 144 51.00000 57.51948 12.8% - 0s 0 0 57.48463 0 141 51.00000 57.48463 12.7% - 0s 0 0 57.45131 0 145 51.00000 57.45131 12.6% - 0s 0 0 57.43173 0 145 51.00000 57.43173 12.6% - 0s 0 0 57.43173 0 143 51.00000 57.43173 12.6% - 0s H 0 0 52.0000000 57.43173 10.4% - 0s 0 2 57.43015 0 143 52.00000 57.43015 10.4% - 0s * 14 8 10 53.0000000 57.43015 8.36% 39.4 0s Cutting planes: Zero half: 85 Explored 186 nodes (7649 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%