Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:17 2012 Optimize a model with 579 rows, 146 columns and 1158 nonzeros Presolve removed 113 rows and 0 columns Presolve time: 0.00s Presolved: 466 rows, 146 columns, 1006 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.975000e+01, 256 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.75000 0 128 44.00000 59.75000 35.8% - 0s 0 0 59.00000 0 118 44.00000 59.00000 34.1% - 0s 0 0 58.50000 0 138 44.00000 58.50000 33.0% - 0s 0 0 57.81132 0 144 44.00000 57.81132 31.4% - 0s H 0 0 46.0000000 57.81132 25.7% - 0s 0 0 57.11364 0 145 46.00000 57.11364 24.2% - 0s 0 0 56.85934 0 145 46.00000 56.85934 23.6% - 0s 0 0 56.57962 0 144 46.00000 56.57962 23.0% - 0s 0 0 56.42500 0 144 46.00000 56.42500 22.7% - 0s 0 0 56.40777 0 145 46.00000 56.40777 22.6% - 0s 0 0 56.40777 0 142 46.00000 56.40777 22.6% - 0s H 0 0 47.0000000 56.40777 20.0% - 0s 0 2 56.40777 0 142 47.00000 56.40777 20.0% - 0s * 75 42 19 48.0000000 56.19734 17.1% 34.5 0s H 127 52 49.0000000 55.47852 13.2% 34.0 0s 616 216 53.50000 5 145 49.00000 53.52174 9.23% 32.2 5s * 1053 219 31 50.0000000 53.52174 7.04% 37.5 9s 1532 150 51.61538 21 101 50.00000 52.28571 4.57% 35.8 10s Cutting planes: Gomory: 1 Zero half: 184 Explored 1849 nodes (62539 simplex iterations) in 10.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%