Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:59:48 2012 Optimize a model with 768 rows, 125 columns and 1536 nonzeros Presolve removed 281 rows and 0 columns Presolve time: 0.00s Presolved: 487 rows, 125 columns, 1225 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.199634e+01, 299 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.99634 0 123 28.00000 41.99634 50.0% - 0s H 0 0 29.0000000 41.99634 44.8% - 0s 0 0 41.00000 0 119 29.00000 41.00000 41.4% - 0s 0 0 41.00000 0 120 29.00000 41.00000 41.4% - 0s 0 0 41.00000 0 116 29.00000 41.00000 41.4% - 0s H 0 0 30.0000000 41.00000 36.7% - 0s 0 0 41.00000 0 116 30.00000 41.00000 36.7% - 0s 0 0 41.00000 0 116 30.00000 41.00000 36.7% - 0s H 0 0 32.0000000 41.00000 28.1% - 0s 0 2 41.00000 0 116 32.00000 41.00000 28.1% - 0s * 210 95 9 33.0000000 39.58865 20.0% 32.5 0s H 1441 261 34.0000000 37.62500 10.7% 29.9 1s * 1445 120 26 35.0000000 37.53608 7.25% 29.9 1s Cutting planes: Gomory: 2 Clique: 1 Zero half: 5 Explored 1648 nodes (49083 simplex iterations) in 2.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%