Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:19:05 2012 Optimize a model with 22495 rows, 5550 columns and 72666 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.70s Presolved: 22567 rows, 5548 columns, 77534 nonzeros Variable types: 0 continuous, 5548 integer (5548 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 2.000000e+00, 4024 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 74.00000 2.00000 97.3% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 2718 5.00000 3.00000 40.0% - 23s 0 0 3.00699 0 4328 5.00000 3.00699 39.9% - 27s 0 0 3.00699 0 4203 5.00000 3.00699 39.9% - 31s 0 0 3.00699 0 4227 5.00000 3.00699 39.9% - 32s 0 0 3.00699 0 4233 5.00000 3.00699 39.9% - 45s 0 0 3.00699 0 4233 5.00000 3.00699 39.9% - 57s 0 0 3.00699 0 4233 5.00000 3.00699 39.9% - 68s 0 0 3.00699 0 4233 5.00000 3.00699 39.9% - 79s 0 2 3.50000 0 4233 5.00000 3.50000 30.0% - 107s 2 2 4.00000 1 134 5.00000 4.00000 20.0% 16370 110s 28 16 4.00000 3 134 5.00000 4.00000 20.0% 2306 115s 165 21 4.00000 16 117 5.00000 4.00000 20.0% 547 120s 448 31 4.00000 14 106 5.00000 4.00000 20.0% 300 125s 701 43 4.00000 8 4233 5.00000 4.00000 20.0% 244 131s 792 28 infeasible 19 5.00000 5.00000 0.0% 241 135s Cutting planes: Zero half: 3 Explored 793 nodes (362065 simplex iterations) in 135.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+00, best bound 5.000000000000e+00, gap 0.0%