Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:23 2012 Optimize a model with 535 rows, 102 columns and 1070 nonzeros Presolve removed 202 rows and 0 columns Presolve time: 0.00s Presolved: 333 rows, 102 columns, 831 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.571739e+01, 260 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.71739 0 101 27.00000 35.71739 32.3% - 0s H 0 0 29.0000000 35.71739 23.2% - 0s 0 0 35.25193 0 100 29.00000 35.25193 21.6% - 0s 0 0 35.04458 0 101 29.00000 35.04458 20.8% - 0s 0 0 34.95925 0 102 29.00000 34.95925 20.5% - 0s 0 0 34.75976 0 100 29.00000 34.75976 19.9% - 0s 0 0 34.69509 0 102 29.00000 34.69509 19.6% - 0s 0 0 34.67538 0 101 29.00000 34.67538 19.6% - 0s 0 0 34.64880 0 101 29.00000 34.64880 19.5% - 0s 0 0 34.64654 0 101 29.00000 34.64654 19.5% - 0s 0 2 34.63979 0 101 29.00000 34.63979 19.4% - 0s * 125 32 11 30.0000000 33.17791 10.6% 25.7 0s Cutting planes: Clique: 3 Zero half: 35 Explored 275 nodes (7108 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%