Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:15 2012 Optimize a model with 488 rows, 99 columns and 976 nonzeros Presolve removed 170 rows and 0 columns Presolve time: 0.00s Presolved: 318 rows, 99 columns, 783 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.508696e+01, 226 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.08696 0 91 26.00000 35.08696 34.9% - 0s H 0 0 27.0000000 35.08696 30.0% - 0s 0 0 34.40957 0 92 27.00000 34.40957 27.4% - 0s 0 0 34.21387 0 92 27.00000 34.21387 26.7% - 0s 0 0 33.82609 0 95 27.00000 33.82609 25.3% - 0s 0 0 33.66176 0 96 27.00000 33.66176 24.7% - 0s 0 0 33.47308 0 96 27.00000 33.47308 24.0% - 0s 0 0 33.44286 0 98 27.00000 33.44286 23.9% - 0s 0 0 33.40801 0 98 27.00000 33.40801 23.7% - 0s 0 0 33.36760 0 97 27.00000 33.36760 23.6% - 0s 0 0 33.35070 0 98 27.00000 33.35070 23.5% - 0s 0 0 33.34891 0 98 27.00000 33.34891 23.5% - 0s 0 0 33.34891 0 97 27.00000 33.34891 23.5% - 0s H 0 0 28.0000000 33.34891 19.1% - 0s 0 2 33.34529 0 97 28.00000 33.34529 19.1% - 0s * 13 10 8 29.0000000 33.29580 14.8% 32.7 0s Cutting planes: Clique: 2 Zero half: 45 Explored 299 nodes (7102 simplex iterations) in 0.26 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%