Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:03 2012 Optimize a model with 160 rows, 76 columns and 320 nonzeros Presolve removed 58 rows and 20 columns Presolve time: 0.00s Presolved: 102 rows, 56 columns, 208 nonzeros Variable types: 0 continuous, 56 integer (56 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.750000e+01, 65 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.50000 0 45 32.00000 37.50000 17.2% - 0s H 0 0 34.0000000 37.50000 10.3% - 0s 0 0 36.50000 0 47 34.00000 36.50000 7.35% - 0s 0 0 36.00000 0 44 34.00000 36.00000 5.88% - 0s 0 0 36.00000 0 46 34.00000 36.00000 5.88% - 0s 0 0 35.83333 0 44 34.00000 35.83333 5.39% - 0s H 0 0 35.0000000 35.83333 2.38% - 0s Cutting planes: Gomory: 1 Zero half: 9 Explored 0 nodes (178 simplex iterations) in 0.01 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%