Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:34 2012 Optimize a model with 522 rows, 104 columns and 1044 nonzeros Presolve removed 186 rows and 0 columns Presolve time: 0.00s Presolved: 336 rows, 104 columns, 833 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.733929e+01, 212 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.33929 0 100 29.00000 37.33929 28.8% - 0s H 0 0 30.0000000 37.33929 24.5% - 0s 0 0 36.89637 0 100 30.00000 36.89637 23.0% - 0s H 0 0 32.0000000 36.89637 15.3% - 0s 0 0 36.78160 0 99 32.00000 36.78160 14.9% - 0s 0 0 36.34531 0 97 32.00000 36.34531 13.6% - 0s 0 0 36.26848 0 98 32.00000 36.26848 13.3% - 0s 0 0 35.94607 0 100 32.00000 35.94607 12.3% - 0s 0 0 35.82522 0 102 32.00000 35.82522 12.0% - 0s 0 0 35.67129 0 101 32.00000 35.67129 11.5% - 0s 0 0 35.57831 0 101 32.00000 35.57831 11.2% - 0s 0 0 35.55536 0 102 32.00000 35.55536 11.1% - 0s 0 0 35.50962 0 102 32.00000 35.50962 11.0% - 0s 0 0 35.49101 0 102 32.00000 35.49101 10.9% - 0s 0 0 35.49101 0 101 32.00000 35.49101 10.9% - 0s 0 2 35.49080 0 101 32.00000 35.49080 10.9% - 0s Cutting planes: Clique: 1 Zero half: 48 Explored 114 nodes (4269 simplex iterations) in 0.21 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%