Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:14:04 2012 Optimize a model with 561 rows, 521 columns and 1921 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 561 rows, 506 columns, 1906 nonzeros Variable types: 0 continuous, 506 integer (505 binary) Found heuristic solution: objective 112.0000000 Root relaxation: objective 0.000000e+00, 304 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 0 217 112.00000 0.00000 100% - 0s H 0 0 86.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.43008 0 219 77.00000 0.43008 99.4% - 0s H 0 0 61.0000000 0.43008 99.3% - 0s H 0 0 60.0000000 0.43008 99.3% - 0s 0 0 0.84479 0 224 60.00000 0.84479 98.6% - 0s H 0 0 58.0000000 0.84479 98.5% - 0s 0 0 0.84479 0 224 58.00000 0.84479 98.5% - 0s H 0 0 56.0000000 0.84479 98.5% - 0s H 0 0 37.0000000 0.84479 97.7% - 0s 0 2 0.86797 0 224 37.00000 0.86797 97.7% - 0s H 31 29 17.0000000 1.03661 93.9% 44.7 0s 2917 297 14.06623 21 175 17.00000 12.27966 27.8% 28.1 5s * 3803 74 23 16.0000000 14.20000 11.3% 27.4 6s Explored 3903 nodes (106732 simplex iterations) in 6.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%