Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:58:14 2012 Optimize a model with 569 rows, 524 columns and 1944 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 569 rows, 502 columns, 1922 nonzeros Variable types: 0 continuous, 502 integer (501 binary) Found heuristic solution: objective 110.0000000 Root relaxation: objective 0.000000e+00, 282 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 0 211 110.00000 0.00000 100% - 0s H 0 0 89.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.43128 0 212 79.00000 0.43128 99.5% - 0s H 0 0 78.0000000 0.43128 99.4% - 0s 0 0 0.73253 0 215 78.00000 0.73253 99.1% - 0s H 0 0 74.0000000 0.73253 99.0% - 0s 0 0 0.73253 0 215 74.00000 0.73253 99.0% - 0s 0 0 0.73253 0 215 74.00000 0.73253 99.0% - 0s H 0 0 65.0000000 0.73253 98.9% - 0s H 0 0 31.0000000 0.73253 97.6% - 0s 0 2 0.73420 0 214 31.00000 0.73420 97.6% - 0s H 81 39 22.0000000 2.02824 90.8% 27.6 0s H 190 72 21.0000000 4.12917 80.3% 24.6 0s H 2716 519 20.0000000 12.78261 36.1% 28.8 4s 2770 524 17.80952 25 202 20.00000 12.83486 35.8% 28.6 5s 5806 186 18.82609 25 172 20.00000 16.74576 16.3% 28.3 10s Explored 6165 nodes (172580 simplex iterations) in 10.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%