Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:46 2012 Optimize a model with 265 rows, 76 columns and 530 nonzeros Presolve removed 75 rows and 1 columns Presolve time: 0.00s Presolved: 190 rows, 75 columns, 430 nonzeros Variable types: 0 continuous, 75 integer (75 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.100000e+01, 119 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.00000 0 62 24.00000 31.00000 29.2% - 0s 0 0 30.71429 0 74 24.00000 30.71429 28.0% - 0s H 0 0 26.0000000 30.71429 18.1% - 0s H 0 0 27.0000000 30.71429 13.8% - 0s 0 0 30.09783 0 75 27.00000 30.09783 11.5% - 0s 0 0 29.76224 0 72 27.00000 29.76224 10.2% - 0s 0 0 29.51111 0 72 27.00000 29.51111 9.30% - 0s 0 0 29.39691 0 74 27.00000 29.39691 8.88% - 0s 0 0 29.33333 0 72 27.00000 29.33333 8.64% - 0s 0 0 29.27848 0 74 27.00000 29.27848 8.44% - 0s 0 0 29.13934 0 73 27.00000 29.13934 7.92% - 0s 0 0 28.98758 0 74 27.00000 28.98758 7.36% - 0s 0 0 28.91525 0 72 27.00000 28.91525 7.09% - 0s 0 0 28.86806 0 73 27.00000 28.86806 6.92% - 0s 0 0 28.85461 0 74 27.00000 28.85461 6.87% - 0s 0 0 28.85461 0 73 27.00000 28.85461 6.87% - 0s 0 2 28.85461 0 73 27.00000 28.85461 6.87% - 0s Cutting planes: Zero half: 34 Explored 24 nodes (902 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%