Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:09:57 2012 Optimize a model with 11780 rows, 4032 columns and 39058 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.33s Presolved: 11778 rows, 4030 columns, 38684 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 2939 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 63.00000 2.00000 96.8% - 0s H 0 0 61.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 176 5.00000 2.66667 46.7% - 2s 0 0 2.67033 0 3496 5.00000 2.67033 46.6% - 2s 0 0 2.67033 0 3495 5.00000 2.67033 46.6% - 4s 0 0 2.67033 0 3508 5.00000 2.67033 46.6% - 4s 0 0 2.67033 0 2997 5.00000 2.67033 46.6% - 10s 0 0 2.67033 0 3123 5.00000 2.67033 46.6% - 15s H 0 0 4.0000000 2.67033 33.2% - 15s 0 0 2.67033 0 3122 4.00000 2.67033 33.2% - 20s 0 0 2.67033 0 3102 4.00000 2.67033 33.2% - 24s 0 0 2.67033 0 3052 4.00000 2.67033 33.2% - 29s 0 0 2.67033 0 3108 4.00000 2.67033 33.2% - 33s 0 0 2.67033 0 3086 4.00000 2.67033 33.2% - 37s 0 0 2.67033 0 3113 4.00000 2.67033 33.2% - 41s 0 0 2.67033 0 3127 4.00000 2.67033 33.2% - 44s 0 0 2.67033 0 3127 4.00000 2.67033 33.2% - 46s 0 2 2.80000 0 3127 4.00000 2.80000 30.0% - 58s 10 0 cutoff 1 4.00000 4.00000 0.0% 1378 60s Cutting planes: Clique: 63 Zero half: 7 Explored 11 nodes (134039 simplex iterations) in 60.50 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%