Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:40 2012 Optimize a model with 567 rows, 512 columns and 1927 nonzeros Presolve removed 0 rows and 11 columns Presolve time: 0.00s Presolved: 567 rows, 501 columns, 1916 nonzeros Variable types: 0 continuous, 501 integer (500 binary) Found heuristic solution: objective 114.0000000 Root relaxation: objective 0.000000e+00, 287 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 0 205 114.00000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s 0 0 0.38424 0 207 74.00000 0.38424 99.5% - 0s H 0 0 72.0000000 0.38424 99.5% - 0s 0 0 0.78797 0 212 72.00000 0.78797 98.9% - 0s H 0 0 69.0000000 0.78797 98.9% - 0s 0 0 0.78800 0 211 69.00000 0.78800 98.9% - 0s H 0 0 66.0000000 0.78800 98.8% - 0s 0 0 0.78810 0 214 66.00000 0.78810 98.8% - 0s H 0 0 63.0000000 0.78810 98.7% - 0s H 0 0 54.0000000 0.78810 98.5% - 0s 0 2 0.78959 0 214 54.00000 0.78959 98.5% - 0s H 32 32 45.0000000 1.00000 97.8% 44.8 0s H 54 44 25.0000000 1.00000 96.0% 34.3 0s * 132 77 25 22.0000000 1.00000 95.5% 32.1 0s 2724 652 17.88732 26 168 22.00000 12.92308 41.3% 31.0 5s 5894 790 19.85616 28 175 22.00000 15.73529 28.5% 28.6 10s 9319 455 20.65714 27 168 22.00000 17.41667 20.8% 27.3 15s Explored 10642 nodes (290276 simplex iterations) in 16.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%