Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:32:31 2012 Optimize a model with 541 rows, 488 columns and 1838 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 541 rows, 473 columns, 1823 nonzeros Variable types: 0 continuous, 473 integer (472 binary) Found heuristic solution: objective 120.0000000 Root relaxation: objective 0.000000e+00, 245 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 0 200 120.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s 0 0 0.29517 0 202 82.00000 0.29517 100% - 0s H 0 0 70.0000000 0.29517 100% - 0s 0 0 0.72244 0 203 70.00000 0.72244 99.0% - 0s H 0 0 69.0000000 0.72244 99.0% - 0s 0 0 0.72382 0 203 69.00000 0.72382 99.0% - 0s 0 0 0.72382 0 203 69.00000 0.72382 99.0% - 0s H 0 0 63.0000000 0.72382 98.9% - 0s H 0 0 56.0000000 0.72382 98.7% - 0s 0 2 0.72562 0 203 56.00000 0.72562 98.7% - 0s H 27 27 53.0000000 1.00000 98.1% 44.8 0s H 54 54 37.0000000 1.00000 97.3% 32.4 0s * 63 57 33 24.0000000 1.00000 95.8% 32.6 0s * 102 78 23 23.0000000 1.85878 91.9% 30.5 0s * 735 295 45 21.0000000 8.29870 60.5% 32.6 1s 3387 278 17.56962 18 194 21.00000 16.00000 23.8% 28.5 5s Explored 4357 nodes (119659 simplex iterations) in 6.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%