Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012 Optimize a model with 266 rows, 98 columns and 532 nonzeros Presolve removed 45 rows and 2 columns Presolve time: 0.00s Presolved: 221 rows, 96 columns, 463 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 4.250000e+01, 135 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.50000 0 89 35.00000 42.50000 21.4% - 0s H 0 0 36.0000000 42.50000 18.1% - 0s H 0 0 37.0000000 42.50000 14.9% - 0s 0 0 41.94340 0 88 37.00000 41.94340 13.4% - 0s H 0 0 38.0000000 41.94340 10.4% - 0s 0 0 41.70149 0 89 38.00000 41.70149 9.74% - 0s 0 0 41.21693 0 88 38.00000 41.21693 8.47% - 0s 0 0 40.84091 0 88 38.00000 40.84091 7.48% - 0s 0 0 40.69355 0 90 38.00000 40.69355 7.09% - 0s H 0 0 39.0000000 40.69355 4.34% - 0s 0 0 40.60000 0 83 39.00000 40.60000 4.10% - 0s 0 0 40.48707 0 87 39.00000 40.48707 3.81% - 0s 0 0 40.48198 0 93 39.00000 40.48198 3.80% - 0s 0 0 40.48198 0 89 39.00000 40.48198 3.80% - 0s 0 2 40.48198 0 89 39.00000 40.48198 3.80% - 0s Cutting planes: Gomory: 2 Zero half: 37 Explored 23 nodes (767 simplex iterations) in 0.05 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%