Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:28 2012 Optimize a model with 520 rows, 146 columns and 1040 nonzeros Presolve removed 75 rows and 0 columns Presolve time: 0.00s Presolved: 445 rows, 146 columns, 937 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.400000e+01, 216 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.00000 0 122 47.00000 64.00000 36.2% - 0s 0 0 62.05357 0 144 47.00000 62.05357 32.0% - 0s 0 0 60.75000 0 124 47.00000 60.75000 29.3% - 0s 0 0 60.16754 0 144 47.00000 60.16754 28.0% - 0s 0 0 59.47761 0 139 47.00000 59.47761 26.5% - 0s 0 0 58.94779 0 144 47.00000 58.94779 25.4% - 0s 0 0 58.51855 0 146 47.00000 58.51855 24.5% - 0s 0 0 58.32157 0 145 47.00000 58.32157 24.1% - 0s H 0 0 50.0000000 58.32157 16.6% - 0s 0 0 58.12397 0 144 50.00000 58.12397 16.2% - 0s 0 0 58.04984 0 142 50.00000 58.04984 16.1% - 0s 0 0 57.89719 0 143 50.00000 57.89719 15.8% - 0s 0 0 57.80259 0 146 50.00000 57.80259 15.6% - 0s 0 0 57.79541 0 146 50.00000 57.79541 15.6% - 0s 0 0 57.79541 0 145 50.00000 57.79541 15.6% - 0s 0 2 57.79520 0 145 50.00000 57.79520 15.6% - 0s H 12 12 51.0000000 57.79520 13.3% 58.3 0s * 74 30 14 52.0000000 57.38939 10.4% 40.6 0s * 182 35 14 53.0000000 56.23171 6.10% 37.5 0s Cutting planes: Gomory: 2 Zero half: 186 Explored 380 nodes (14483 simplex iterations) in 0.61 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%