Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:00:56 2012 Optimize a model with 505 rows, 477 columns and 1737 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 505 rows, 460 columns, 1720 nonzeros Variable types: 0 continuous, 460 integer (459 binary) Found heuristic solution: objective 99.0000000 Root relaxation: objective 0.000000e+00, 262 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 0 197 99.00000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.26226 0 199 71.00000 0.26226 100% - 0s H 0 0 58.0000000 0.26226 100% - 0s 0 0 0.92051 0 204 58.00000 0.92051 98.4% - 0s H 0 0 45.0000000 0.92051 98.0% - 0s 0 0 0.92083 0 205 45.00000 0.92083 98.0% - 0s 0 0 0.92083 0 205 45.00000 0.92083 98.0% - 0s 0 2 0.92101 0 205 45.00000 0.92101 98.0% - 0s H 27 27 32.0000000 1.00000 96.9% 45.3 0s H 54 50 18.0000000 1.00000 94.4% 29.9 0s * 112 78 16 17.0000000 1.00000 94.1% 32.0 0s * 2731 623 32 16.0000000 10.00000 37.5% 25.1 4s 3420 648 13.34337 24 189 16.00000 10.92683 31.7% 24.8 5s H 4575 442 15.0000000 11.89655 20.7% 25.0 6s Explored 5350 nodes (134326 simplex iterations) in 7.55 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%