Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:15:26 2012 Optimize a model with 13824 rows, 4160 columns and 45376 nonzeros Presolve removed 1 rows and 64 columns Presolve time: 0.11s Presolved: 13823 rows, 4096 columns, 45522 nonzeros Variable types: 0 continuous, 4096 integer (4096 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 4928 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 40.00000 2.00000 95.0% - 1s H 0 0 12.0000000 2.00000 83.3% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 27s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 32s 0 2 2.00000 0 126 5.00000 2.00000 60.0% - 52s 1 3 2.50000 1 238 5.00000 2.00000 60.0% 78385 80s 2 4 2.50000 1 789 5.00000 2.50000 50.0% 48414 88s 4 6 2.66667 3 170 5.00000 2.50000 50.0% 25421 90s 27 23 4.00000 19 36 5.00000 2.50000 50.0% 4485 95s * 30 11 22 4.0000000 2.50000 37.5% 4038 95s 48 9 2.57143 3 444 4.00000 2.50000 37.5% 2867 100s 72 11 3.00000 4 118 4.00000 2.50000 37.5% 2162 105s Cutting planes: Clique: 185 Explored 140 nodes (250801 simplex iterations) in 109.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%