Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:19 2012 Optimize a model with 336 rows, 116 columns and 672 nonzeros Presolve removed 84 rows and 9 columns Presolve time: 0.00s Presolved: 252 rows, 107 columns, 536 nonzeros Variable types: 0 continuous, 107 integer (107 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.057143e+01, 167 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.57143 0 95 42.00000 50.57143 20.4% - 0s H 0 0 45.0000000 50.57143 12.4% - 0s 0 0 50.00000 0 90 45.00000 50.00000 11.1% - 0s 0 0 49.66667 0 84 45.00000 49.66667 10.4% - 0s 0 0 49.53333 0 95 45.00000 49.53333 10.1% - 0s 0 0 49.19318 0 103 45.00000 49.19318 9.32% - 0s 0 0 49.05556 0 99 45.00000 49.05556 9.01% - 0s 0 0 48.81081 0 104 45.00000 48.81081 8.47% - 0s 0 0 48.78571 0 104 45.00000 48.78571 8.41% - 0s 0 0 48.70095 0 104 45.00000 48.70095 8.22% - 0s 0 0 48.60411 0 107 45.00000 48.60411 8.01% - 0s H 0 0 46.0000000 48.60411 5.66% - 0s 0 0 48.54333 0 104 46.00000 48.54333 5.53% - 0s 0 0 48.50923 0 106 46.00000 48.50923 5.45% - 0s 0 0 48.50000 0 106 46.00000 48.50000 5.43% - 0s 0 0 48.50000 0 106 46.00000 48.50000 5.43% - 0s 0 2 48.50000 0 106 46.00000 48.50000 5.43% - 0s H 16 4 47.0000000 48.24286 2.64% 21.5 0s Cutting planes: Zero half: 49 Explored 21 nodes (1066 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%