Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:22:53 2012 Optimize a model with 537 rows, 483 columns and 1823 nonzeros Presolve removed 0 rows and 13 columns Presolve time: 0.00s Presolved: 537 rows, 470 columns, 1810 nonzeros Variable types: 0 continuous, 470 integer (469 binary) Found heuristic solution: objective 98.0000000 Root relaxation: objective 0.000000e+00, 249 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 0 195 98.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.29321 0 197 77.00000 0.29321 100% - 0s H 0 0 72.0000000 0.29321 100% - 0s 0 0 0.75719 0 200 72.00000 0.75719 98.9% - 0s H 0 0 61.0000000 0.75719 98.8% - 0s 0 0 0.75857 0 202 61.00000 0.75857 98.8% - 0s 0 0 0.75857 0 201 61.00000 0.75857 98.8% - 0s H 0 0 59.0000000 0.75857 98.7% - 0s 0 2 0.76446 0 201 59.00000 0.76446 98.7% - 0s H 27 27 45.0000000 1.00000 97.8% 42.0 0s H 54 43 21.0000000 1.00000 95.2% 34.7 0s H 180 103 19.0000000 1.00000 94.7% 35.6 0s 3128 552 17.19632 25 192 19.00000 12.75000 32.9% 24.7 5s * 3631 484 37 18.0000000 13.11290 27.2% 24.5 5s Explored 4930 nodes (119842 simplex iterations) in 7.42 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%