Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:21:17 2012 Optimize a model with 561 rows, 508 columns and 1908 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 561 rows, 491 columns, 1891 nonzeros Variable types: 0 continuous, 491 integer (490 binary) Found heuristic solution: objective 108.0000000 Root relaxation: objective 0.000000e+00, 271 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 0 202 108.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s 0 0 0.41197 0 203 84.00000 0.41197 100% - 0s H 0 0 61.0000000 0.41197 99.3% - 0s 0 0 1.00000 0 206 61.00000 1.00000 98.4% - 0s 0 0 1.00000 0 205 61.00000 1.00000 98.4% - 0s 0 0 1.00000 0 205 61.00000 1.00000 98.4% - 0s 0 0 1.00000 0 204 61.00000 1.00000 98.4% - 0s H 0 0 59.0000000 1.00000 98.3% - 0s 0 2 1.00000 0 202 59.00000 1.00000 98.3% - 0s H 27 27 58.0000000 3.11295 94.6% 54.5 0s * 63 49 33 27.0000000 3.11295 88.5% 34.7 0s * 231 159 25 26.0000000 5.72917 78.0% 36.9 0s * 361 189 18 25.0000000 7.61243 69.6% 33.2 0s * 447 223 25 24.0000000 8.85714 63.1% 33.0 0s * 1643 474 37 23.0000000 11.50000 50.0% 30.6 2s 2680 705 16.82609 20 216 23.00000 14.05405 38.9% 28.7 5s 5809 754 19.97238 24 219 23.00000 17.50000 23.9% 26.3 10s Explored 9092 nodes (225992 simplex iterations) in 14.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%