current bounds on the number of colors: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:23 2012 Optimize a model with 10868 rows, 1460 columns and 33440 nonzeros Presolve time: 0.04s Presolved: 10868 rows, 1460 columns, 33440 nonzeros Variable types: 0 continuous, 1460 integer (1460 binary) Root relaxation: objective 0.000000e+00, 91 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 (429 simplex iterations) in 0.08 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 18:03:23 2012 Optimize a model with 5456 rows, 976 columns and 16720 nonzeros Presolve time: 0.02s Presolved: 5456 rows, 976 columns, 16720 nonzeros Variable types: 0 continuous, 976 integer (976 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 0.00000 0 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (933 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% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:23 2012 Optimize a model with 2504 rows, 712 columns and 7600 nonzeros Presolve time: 0.01s Presolved: 2504 rows, 712 columns, 7600 nonzeros Variable types: 0 continuous, 712 integer (712 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 78 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1864 simplex iterations) in 0.20 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 18:03:23 2012 Optimize a model with 3980 rows, 844 columns and 12160 nonzeros Presolve time: 0.01s Presolved: 3980 rows, 844 columns, 12160 nonzeros Variable types: 0 continuous, 844 integer (844 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 36 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 115 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 1s 0 0 0.00000 0 99 - 0.00000 - - 1s 0 0 0.00000 0 101 - 0.00000 - - 1s 0 0 0.00000 0 101 - 0.00000 - - 1s 0 0 0.00000 0 101 - 0.00000 - - 2s 0 2 0.00000 0 101 - 0.00000 - - 2s Cutting planes: Clique: 63 Zero half: 4 Explored 82 nodes (28202 simplex iterations) in 3.27 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 18:03:27 2012 Optimize a model with 4472 rows, 888 columns and 13680 nonzeros Presolve time: 0.01s Presolved: 4472 rows, 888 columns, 13680 nonzeros Variable types: 0 continuous, 888 integer (888 binary) Root relaxation: objective 0.000000e+00, 93 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 26 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 25 Zero half: 26 Explored 0 nodes (1283 simplex iterations) in 0.08 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