current bounds on the number of colors: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:08 2012 Optimize a model with 10296 rows, 1434 columns and 31724 nonzeros Presolve time: 0.04s Presolved: 10296 rows, 1434 columns, 31724 nonzeros Variable types: 0 continuous, 1434 integer (1434 binary) Root relaxation: objective 0.000000e+00, 98 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 (232 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 18:03:08 2012 Optimize a model with 5170 rows, 950 columns and 15862 nonzeros Presolve time: 0.01s Presolved: 5170 rows, 950 columns, 15862 nonzeros Variable types: 0 continuous, 950 integer (950 binary) Root relaxation: objective 0.000000e+00, 94 iterations, 0.00 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 (569 simplex iterations) in 0.04 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 18:03:08 2012 Optimize a model with 2374 rows, 686 columns and 7210 nonzeros Presolve time: 0.01s Presolved: 2374 rows, 686 columns, 7210 nonzeros Variable types: 0 continuous, 686 integer (686 binary) Root relaxation: objective 0.000000e+00, 89 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 66 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2046 simplex iterations) in 0.21 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 18:03:08 2012 Optimize a model with 3772 rows, 818 columns and 11536 nonzeros Presolve time: 0.01s Presolved: 3772 rows, 818 columns, 11536 nonzeros Variable types: 0 continuous, 818 integer (818 binary) Root relaxation: objective 0.000000e+00, 89 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 32 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 91 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 164 - 0.00000 - - 1s 0 0 0.00000 0 156 - 0.00000 - - 1s 0 0 0.00000 0 108 - 0.00000 - - 2s 0 0 0.00000 0 90 - 0.00000 - - 2s 0 0 0.00000 0 148 - 0.00000 - - 2s 0 0 0.00000 0 106 - 0.00000 - - 3s 0 2 0.00000 0 106 - 0.00000 - - 3s 143 5 infeasible 13 - 0.00000 - 94.6 5s Cutting planes: Clique: 110 Explored 203 nodes (45343 simplex iterations) in 5.36 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 18:03:14 2012 Optimize a model with 4238 rows, 862 columns and 12978 nonzeros Presolve time: 0.01s Presolved: 4238 rows, 862 columns, 12978 nonzeros Variable types: 0 continuous, 862 integer (862 binary) Root relaxation: objective 0.000000e+00, 92 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 56 - 0.00000 - - 0s 0 0 0.00000 0 41 - 0.00000 - - 0s Cutting planes: Clique: 2 Explored 0 nodes (1688 simplex iterations) in 0.12 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