Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:08 2012 Optimize a model with 570 rows, 108 columns and 1140 nonzeros Presolve removed 183 rows and 0 columns Presolve time: 0.00s Presolved: 387 rows, 108 columns, 925 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.850667e+01, 258 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.50667 0 103 26.00000 38.50667 48.1% - 0s 0 0 37.40846 0 104 26.00000 37.40846 43.9% - 0s 0 0 37.29841 0 105 26.00000 37.29841 43.5% - 0s H 0 0 28.0000000 37.29841 33.2% - 0s 0 0 37.03466 0 106 28.00000 37.03466 32.3% - 0s 0 0 36.81521 0 107 28.00000 36.81521 31.5% - 0s H 0 0 29.0000000 36.81521 26.9% - 0s 0 0 36.72814 0 106 29.00000 36.72814 26.6% - 0s 0 0 36.68403 0 107 29.00000 36.68403 26.5% - 0s H 0 0 30.0000000 36.68403 22.3% - 0s 0 0 36.65421 0 107 30.00000 36.65421 22.2% - 0s 0 0 36.62606 0 106 30.00000 36.62606 22.1% - 0s 0 0 36.60298 0 107 30.00000 36.60298 22.0% - 0s 0 0 36.59513 0 106 30.00000 36.59513 22.0% - 0s 0 0 36.59513 0 106 30.00000 36.59513 22.0% - 0s 0 2 36.58989 0 106 30.00000 36.58989 22.0% - 0s * 318 60 10 31.0000000 34.33102 10.7% 24.0 0s Cutting planes: Zero half: 57 Explored 612 nodes (14925 simplex iterations) in 0.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%