Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:49:54 2012 Optimize a model with 555 rows, 516 columns and 1901 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 555 rows, 496 columns, 1881 nonzeros Variable types: 0 continuous, 496 integer (495 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 296 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 0 212 102.00000 0.00000 100% - 0s H 0 0 98.0000000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s 0 0 0.49979 0 214 76.00000 0.49979 99.3% - 0s H 0 0 69.0000000 0.49979 99.3% - 0s 0 0 0.82630 0 216 69.00000 0.82630 98.8% - 0s H 0 0 62.0000000 0.82630 98.7% - 0s H 0 0 52.0000000 0.82630 98.4% - 0s 0 0 0.82867 0 218 52.00000 0.82867 98.4% - 0s 0 0 0.82867 0 218 52.00000 0.82867 98.4% - 0s 0 2 0.83754 0 218 52.00000 0.83754 98.4% - 0s H 27 27 34.0000000 0.98085 97.1% 33.0 0s H 51 37 21.0000000 0.98085 95.3% 24.7 0s * 78 41 21 18.0000000 1.00000 94.4% 32.3 0s * 982 230 30 17.0000000 8.23596 51.6% 35.0 1s Explored 2431 nodes (73292 simplex iterations) in 4.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%