Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:54 2012 Optimize a model with 354 rows, 86 columns and 708 nonzeros Presolve removed 103 rows and 0 columns Presolve time: 0.00s Presolved: 251 rows, 86 columns, 587 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.350000e+01, 161 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.50000 0 77 24.00000 33.50000 39.6% - 0s H 0 0 25.0000000 33.50000 34.0% - 0s H 0 0 26.0000000 33.50000 28.8% - 0s 0 0 32.71968 0 84 26.00000 32.71968 25.8% - 0s 0 0 32.43870 0 86 26.00000 32.43870 24.8% - 0s 0 0 32.13910 0 85 26.00000 32.13910 23.6% - 0s 0 0 31.88016 0 85 26.00000 31.88016 22.6% - 0s 0 0 31.73301 0 84 26.00000 31.73301 22.1% - 0s H 0 0 27.0000000 31.73301 17.5% - 0s 0 0 31.52128 0 85 27.00000 31.52128 16.7% - 0s 0 0 31.46331 0 84 27.00000 31.46331 16.5% - 0s 0 0 31.41511 0 85 27.00000 31.41511 16.4% - 0s 0 0 31.32654 0 84 27.00000 31.32654 16.0% - 0s 0 0 31.26346 0 86 27.00000 31.26346 15.8% - 0s 0 0 31.21079 0 86 27.00000 31.21079 15.6% - 0s H 0 0 28.0000000 31.21079 11.5% - 0s 0 0 31.17217 0 86 28.00000 31.17217 11.3% - 0s 0 0 31.12673 0 86 28.00000 31.12673 11.2% - 0s 0 0 31.07625 0 86 28.00000 31.07625 11.0% - 0s 0 0 31.05209 0 85 28.00000 31.05209 10.9% - 0s 0 0 31.03689 0 84 28.00000 31.03689 10.8% - 0s 0 0 31.01230 0 86 28.00000 31.01230 10.8% - 0s 0 0 31.01230 0 86 28.00000 31.01230 10.8% - 0s 0 2 31.01001 0 86 28.00000 31.01001 10.8% - 0s * 63 1 6 29.0000000 29.00000 0.0% 23.1 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 57 Explored 64 nodes (2257 simplex iterations) in 0.13 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%