Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:56 2012 Optimize a model with 358 rows, 87 columns and 716 nonzeros Presolve removed 109 rows and 0 columns Presolve time: 0.00s Presolved: 249 rows, 87 columns, 586 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.340678e+01, 166 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.40678 0 85 27.00000 33.40678 23.7% - 0s 0 0 32.73778 0 85 27.00000 32.73778 21.3% - 0s 0 0 32.25411 0 84 27.00000 32.25411 19.5% - 0s 0 0 32.06312 0 85 27.00000 32.06312 18.8% - 0s 0 0 31.91026 0 84 27.00000 31.91026 18.2% - 0s 0 0 31.78544 0 83 27.00000 31.78544 17.7% - 0s H 0 0 28.0000000 31.78544 13.5% - 0s 0 0 31.65228 0 83 28.00000 31.65228 13.0% - 0s 0 0 31.57143 0 84 28.00000 31.57143 12.8% - 0s 0 0 31.44000 0 83 28.00000 31.44000 12.3% - 0s 0 0 31.36640 0 84 28.00000 31.36640 12.0% - 0s 0 0 31.25000 0 81 28.00000 31.25000 11.6% - 0s 0 0 31.21875 0 83 28.00000 31.21875 11.5% - 0s 0 0 31.17214 0 80 28.00000 31.17214 11.3% - 0s 0 0 31.13793 0 81 28.00000 31.13793 11.2% - 0s 0 0 31.09015 0 84 28.00000 31.09015 11.0% - 0s 0 0 31.04436 0 85 28.00000 31.04436 10.9% - 0s 0 0 31.04077 0 85 28.00000 31.04077 10.9% - 0s 0 0 31.04077 0 85 28.00000 31.04077 10.9% - 0s 0 2 31.04014 0 85 28.00000 31.04014 10.9% - 0s * 6 6 6 29.0000000 31.04014 7.03% 32.0 0s Cutting planes: Zero half: 47 Explored 26 nodes (1319 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%