Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:15:15 2012 Optimize a model with 523 rows, 488 columns and 1793 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 523 rows, 472 columns, 1777 nonzeros Variable types: 0 continuous, 472 integer (471 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 264 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 0 204 102.00000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s 0 0 0.55303 0 206 60.00000 0.55303 99.1% - 0s H 0 0 59.0000000 0.55303 99.1% - 0s 0 0 0.99729 0 210 59.00000 0.99729 98.3% - 0s H 0 0 42.0000000 0.99729 97.6% - 0s H 0 0 35.0000000 0.99729 97.2% - 0s 0 0 0.99737 0 212 35.00000 0.99737 97.2% - 0s 0 0 0.99737 0 212 35.00000 0.99737 97.2% - 0s H 0 0 33.0000000 0.99737 97.0% - 0s 0 2 0.99878 0 211 33.00000 0.99878 97.0% - 0s H 27 27 23.0000000 1.00127 95.6% 39.4 0s H 54 36 17.0000000 1.00127 94.1% 27.9 0s * 113 56 20 16.0000000 2.29166 85.7% 28.8 0s * 834 258 39 15.0000000 6.90000 54.0% 29.5 1s Explored 2822 nodes (76041 simplex iterations) in 3.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%