Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012 Optimize a model with 259 rows, 96 columns and 518 nonzeros Presolve removed 47 rows and 4 columns Presolve time: 0.00s Presolved: 212 rows, 92 columns, 446 nonzeros Variable types: 0 continuous, 92 integer (92 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 4.325000e+01, 129 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.25000 0 83 34.00000 43.25000 27.2% - 0s H 0 0 35.0000000 43.25000 23.6% - 0s H 0 0 36.0000000 43.25000 20.1% - 0s 0 0 41.65517 0 91 36.00000 41.65517 15.7% - 0s H 0 0 39.0000000 41.65517 6.81% - 0s 0 0 41.29412 0 90 39.00000 41.29412 5.88% - 0s 0 0 40.93846 0 92 39.00000 40.93846 4.97% - 0s 0 0 40.75472 0 91 39.00000 40.75472 4.50% - 0s 0 0 40.47619 0 91 39.00000 40.47619 3.79% - 0s 0 0 40.44737 0 91 39.00000 40.44737 3.71% - 0s 0 0 40.44737 0 90 39.00000 40.44737 3.71% - 0s 0 2 40.43537 0 90 39.00000 40.43537 3.68% - 0s Cutting planes: Gomory: 1 Zero half: 29 Explored 10 nodes (596 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%