current bounds on the number of colors: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:03 2012 Optimize a model with 9900 rows, 1416 columns and 30536 nonzeros Presolve time: 0.04s Presolved: 9900 rows, 1416 columns, 30536 nonzeros Variable types: 0 continuous, 1416 integer (1416 binary) Root relaxation: objective 0.000000e+00, 96 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (271 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:04 2012 Optimize a model with 4972 rows, 932 columns and 15268 nonzeros Presolve time: 0.01s Presolved: 4972 rows, 932 columns, 15268 nonzeros Variable types: 0 continuous, 932 integer (932 binary) Root relaxation: objective 0.000000e+00, 97 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (840 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:04 2012 Optimize a model with 2284 rows, 668 columns and 6940 nonzeros Presolve time: 0.01s Presolved: 2284 rows, 668 columns, 6940 nonzeros Variable types: 0 continuous, 668 integer (668 binary) Root relaxation: objective 0.000000e+00, 90 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 52 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1786 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:04 2012 Optimize a model with 3628 rows, 800 columns and 11104 nonzeros Presolve time: 0.01s Presolved: 3628 rows, 800 columns, 11104 nonzeros Variable types: 0 continuous, 800 integer (800 binary) Root relaxation: objective 0.000000e+00, 88 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 40 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 145 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 0s 0 0 0.00000 0 141 - 0.00000 - - 1s 0 0 0.00000 0 89 - 0.00000 - - 1s 0 0 0.00000 0 119 - 0.00000 - - 1s 0 0 0.00000 0 119 - 0.00000 - - 2s 0 2 0.00000 0 119 - 0.00000 - - 2s Cutting planes: Clique: 49 Zero half: 7 Explored 139 nodes (27057 simplex iterations) in 3.45 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:07 2012 Optimize a model with 4076 rows, 844 columns and 12492 nonzeros Presolve time: 0.01s Presolved: 4076 rows, 844 columns, 12492 nonzeros Variable types: 0 continuous, 844 integer (844 binary) Root relaxation: objective 0.000000e+00, 91 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 45 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1029 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 9