Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:30 2012 Optimize a model with 525 rows, 103 columns and 1050 nonzeros Presolve removed 194 rows and 0 columns Presolve time: 0.00s Presolved: 331 rows, 103 columns, 826 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.695000e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.95000 0 100 25.00000 36.95000 47.8% - 0s H 0 0 29.0000000 36.95000 27.4% - 0s 0 0 36.00000 0 98 29.00000 36.00000 24.1% - 0s 0 0 36.00000 0 97 29.00000 36.00000 24.1% - 0s 0 0 35.97035 0 103 29.00000 35.97035 24.0% - 0s 0 0 35.52436 0 96 29.00000 35.52436 22.5% - 0s 0 0 35.30383 0 101 29.00000 35.30383 21.7% - 0s 0 0 35.17606 0 97 29.00000 35.17606 21.3% - 0s 0 0 35.09068 0 101 29.00000 35.09068 21.0% - 0s 0 0 35.07461 0 99 29.00000 35.07461 20.9% - 0s H 0 0 30.0000000 35.07461 16.9% - 0s 0 0 35.06357 0 99 30.00000 35.06357 16.9% - 0s 0 0 35.06357 0 99 30.00000 35.06357 16.9% - 0s H 0 0 32.0000000 35.06357 9.57% - 0s 0 2 35.06357 0 99 32.00000 35.06357 9.57% - 0s Cutting planes: Clique: 2 Zero half: 40 Explored 59 nodes (2749 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%