Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:19:44 2012 Optimize a model with 471 rows, 448 columns and 1623 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 471 rows, 426 columns, 1601 nonzeros Variable types: 0 continuous, 426 integer (425 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 250 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 177 87.00000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s 0 0 0.25180 0 179 65.00000 0.25180 100% - 0s H 0 0 59.0000000 0.25180 100% - 0s 0 0 0.77279 0 182 59.00000 0.77279 98.7% - 0s H 0 0 45.0000000 0.77279 98.3% - 0s 0 0 0.77345 0 184 45.00000 0.77345 98.3% - 0s H 0 0 42.0000000 0.77345 98.2% - 0s 0 2 0.77350 0 184 42.00000 0.77350 98.2% - 0s H 27 27 40.0000000 1.00000 97.5% 33.0 0s * 41 33 27 16.0000000 1.00000 93.8% 26.3 0s * 141 84 16 15.0000000 1.00000 93.3% 35.5 0s Explored 1437 nodes (40518 simplex iterations) in 1.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%