Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:06 2012 Optimize a model with 453 rows, 95 columns and 906 nonzeros Presolve removed 154 rows and 0 columns Presolve time: 0.00s Presolved: 299 rows, 95 columns, 723 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.536932e+01, 184 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.36932 0 90 29.00000 35.36932 22.0% - 0s H 0 0 32.0000000 35.36932 10.5% - 0s 0 0 34.70992 0 89 32.00000 34.70992 8.47% - 0s 0 0 34.48104 0 91 32.00000 34.48104 7.75% - 0s 0 0 34.22159 0 89 32.00000 34.22159 6.94% - 0s 0 0 34.17320 0 89 32.00000 34.17320 6.79% - 0s 0 0 34.05046 0 92 32.00000 34.05046 6.41% - 0s 0 0 33.97001 0 91 32.00000 33.97001 6.16% - 0s 0 0 33.92327 0 91 32.00000 33.92327 6.01% - 0s 0 0 33.81686 0 90 32.00000 33.81686 5.68% - 0s 0 0 33.76532 0 91 32.00000 33.76532 5.52% - 0s 0 0 33.75338 0 91 32.00000 33.75338 5.48% - 0s 0 0 33.75338 0 91 32.00000 33.75338 5.48% - 0s 0 2 33.75338 0 91 32.00000 33.75338 5.48% - 0s Cutting planes: Clique: 2 Zero half: 35 Explored 19 nodes (1065 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%