Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:07 2012 Optimize a model with 228 rows, 93 columns and 456 nonzeros Presolve removed 45 rows and 5 columns Presolve time: 0.00s Presolved: 183 rows, 88 columns, 385 nonzeros Variable types: 0 continuous, 88 integer (88 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.300000e+01, 122 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.00000 0 75 37.00000 43.00000 16.2% - 0s H 0 0 39.0000000 43.00000 10.3% - 0s 0 0 42.33333 0 69 39.00000 42.33333 8.55% - 0s 0 0 42.12069 0 85 39.00000 42.12069 8.00% - 0s 0 0 41.57143 0 81 39.00000 41.57143 6.59% - 0s 0 0 41.33333 0 81 39.00000 41.33333 5.98% - 0s 0 0 41.13333 0 86 39.00000 41.13333 5.47% - 0s 0 0 41.03797 0 83 39.00000 41.03797 5.23% - 0s 0 0 40.90000 0 86 39.00000 40.90000 4.87% - 0s 0 0 40.69565 0 84 39.00000 40.69565 4.35% - 0s 0 0 40.54118 0 87 39.00000 40.54118 3.95% - 0s 0 0 40.48352 0 87 39.00000 40.48352 3.80% - 0s 0 0 40.43564 0 88 39.00000 40.43564 3.68% - 0s 0 0 40.43333 0 88 39.00000 40.43333 3.68% - 0s 0 0 40.43333 0 83 39.00000 40.43333 3.68% - 0s 0 2 40.40000 0 83 39.00000 40.40000 3.59% - 0s * 1 1 1 40.0000000 40.40000 1.00% 19.0 0s Cutting planes: Zero half: 31 Explored 2 nodes (501 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%