Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:44:32 2012 Optimize a model with 551 rows, 496 columns and 1871 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 551 rows, 476 columns, 1851 nonzeros Variable types: 0 continuous, 476 integer (475 binary) Found heuristic solution: objective 98.0000000 Root relaxation: objective 0.000000e+00, 255 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 0 196 98.00000 0.00000 100% - 0s H 0 0 89.0000000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s 0 0 0.43012 0 199 73.00000 0.43012 99.4% - 0s H 0 0 67.0000000 0.43012 99.4% - 0s 0 0 0.87648 0 201 67.00000 0.87648 98.7% - 0s H 0 0 48.0000000 0.87648 98.2% - 0s H 0 0 45.0000000 0.87648 98.1% - 0s 0 0 0.87696 0 203 45.00000 0.87696 98.1% - 0s 0 0 0.87696 0 203 45.00000 0.87696 98.1% - 0s H 0 0 44.0000000 0.87696 98.0% - 0s H 0 0 40.0000000 0.87696 97.8% - 0s 0 2 0.93781 0 203 40.00000 0.93781 97.7% - 0s H 54 54 26.0000000 3.38000 87.0% 31.7 0s * 133 92 24 25.0000000 4.88083 80.5% 29.3 0s * 420 228 22 24.0000000 7.64516 68.1% 29.2 0s * 751 332 32 23.0000000 9.00000 60.9% 30.9 1s H 1164 304 22.0000000 10.43333 52.6% 29.5 1s * 1616 333 31 21.0000000 12.86667 38.7% 27.9 2s 2950 277 cutoff 24 21.00000 16.10256 23.3% 27.1 5s Explored 4044 nodes (103649 simplex iterations) in 6.46 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%