Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:22 2012 Optimize a model with 362 rows, 119 columns and 724 nonzeros Presolve removed 82 rows and 5 columns Presolve time: 0.00s Presolved: 280 rows, 114 columns, 600 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.150000e+01, 179 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.50000 0 100 40.00000 51.50000 28.7% - 0s H 0 0 41.0000000 51.50000 25.6% - 0s H 0 0 44.0000000 51.50000 17.0% - 0s 0 0 50.39130 0 106 44.00000 50.39130 14.5% - 0s 0 0 49.66667 0 109 44.00000 49.66667 12.9% - 0s 0 0 49.16279 0 105 44.00000 49.16279 11.7% - 0s 0 0 48.98387 0 109 44.00000 48.98387 11.3% - 0s 0 0 48.78689 0 103 44.00000 48.78689 10.9% - 0s H 0 0 45.0000000 48.78689 8.42% - 0s 0 0 48.75258 0 108 45.00000 48.75258 8.34% - 0s 0 0 48.69504 0 109 45.00000 48.69504 8.21% - 0s 0 0 48.63717 0 110 45.00000 48.63717 8.08% - 0s 0 0 48.60000 0 112 45.00000 48.60000 8.00% - 0s 0 0 48.58352 0 113 45.00000 48.58352 7.96% - 0s 0 0 48.58352 0 111 45.00000 48.58352 7.96% - 0s H 0 0 46.0000000 48.58352 5.62% - 0s 0 2 48.58140 0 111 46.00000 48.58140 5.61% - 0s * 37 2 3 47.0000000 48.00000 2.13% 22.6 0s Cutting planes: Zero half: 54 Explored 40 nodes (1489 simplex iterations) in 0.09 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%