Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:39:13 2012 Optimize a model with 539 rows, 500 columns and 1845 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 539 rows, 480 columns, 1825 nonzeros Variable types: 0 continuous, 480 integer (479 binary) Found heuristic solution: objective 103.0000000 Root relaxation: objective 0.000000e+00, 263 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 0 204 103.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.28303 0 206 79.00000 0.28303 100% - 0s H 0 0 77.0000000 0.28303 100% - 0s 0 0 0.87685 0 205 77.00000 0.87685 98.9% - 0s H 0 0 74.0000000 0.87685 98.8% - 0s 0 0 0.87706 0 208 74.00000 0.87706 98.8% - 0s H 0 0 73.0000000 0.87706 98.8% - 0s 0 0 0.87706 0 207 73.00000 0.87706 98.8% - 0s H 0 0 72.0000000 0.87706 98.8% - 0s 0 0 0.87706 0 207 72.00000 0.87706 98.8% - 0s H 0 0 67.0000000 0.87706 98.7% - 0s H 0 0 65.0000000 0.87706 98.7% - 0s H 0 0 63.0000000 0.87706 98.6% - 0s H 0 0 61.0000000 0.87706 98.6% - 0s 0 2 0.87740 0 207 61.00000 0.87740 98.6% - 0s H 27 27 51.0000000 1.00000 98.0% 43.8 0s * 34 32 22 18.0000000 1.00000 94.4% 41.0 0s Explored 2433 nodes (71269 simplex iterations) in 4.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%