Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:48 2012 Optimize a model with 310 rows, 78 columns and 620 nonzeros Presolve removed 94 rows and 0 columns Presolve time: 0.00s Presolved: 216 rows, 78 columns, 506 nonzeros Variable types: 0 continuous, 78 integer (78 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.011364e+01, 152 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30.11364 0 74 24.00000 30.11364 25.5% - 0s 0 0 29.55825 0 77 24.00000 29.55825 23.2% - 0s H 0 0 25.0000000 29.55825 18.2% - 0s 0 0 29.04620 0 77 25.00000 29.04620 16.2% - 0s 0 0 28.59375 0 76 25.00000 28.59375 14.4% - 0s 0 0 28.51852 0 76 25.00000 28.51852 14.1% - 0s 0 0 28.34125 0 77 25.00000 28.34125 13.4% - 0s 0 0 28.33583 0 77 25.00000 28.33583 13.3% - 0s 0 0 28.33583 0 77 25.00000 28.33583 13.3% - 0s 0 2 28.33190 0 77 25.00000 28.33190 13.3% - 0s * 20 4 10 26.0000000 28.33161 8.97% 15.5 0s Cutting planes: Zero half: 31 Explored 38 nodes (1128 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%