current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:05:11 2012 Optimize a model with 11287 rows, 1501 columns and 34716 nonzeros Presolve time: 0.04s Presolved: 11287 rows, 1501 columns, 34716 nonzeros Variable types: 0 continuous, 1501 integer (1501 binary) Root relaxation: objective 0.000000e+00, 100 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 (378 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 18:05:12 2012 Optimize a model with 5666 rows, 1006 columns and 17358 nonzeros Presolve time: 0.02s Presolved: 5666 rows, 1006 columns, 17358 nonzeros Variable types: 0 continuous, 1006 integer (1006 binary) Root relaxation: objective 0.000000e+00, 103 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 46 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (670 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 18:05:12 2012 Optimize a model with 2600 rows, 736 columns and 7890 nonzeros Presolve time: 0.01s Presolved: 2600 rows, 736 columns, 7890 nonzeros Variable types: 0 continuous, 736 integer (736 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 66 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1894 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 18:05:12 2012 Optimize a model with 4133 rows, 871 columns and 12624 nonzeros Presolve time: 0.01s Presolved: 4133 rows, 871 columns, 12624 nonzeros Variable types: 0 continuous, 871 integer (871 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 38 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 203 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 1s 0 0 0.00000 0 172 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 2s 0 0 0.00000 0 128 - 0.00000 - - 2s 0 2 0.00000 0 128 - 0.00000 - - 2s Cutting planes: Clique: 59 Zero half: 9 Explored 25 nodes (24713 simplex iterations) in 3.23 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 18:05:15 2012 Optimize a model with 4644 rows, 916 columns and 14202 nonzeros Presolve time: 0.01s Presolved: 4644 rows, 916 columns, 14202 nonzeros Variable types: 0 continuous, 916 integer (916 binary) Root relaxation: objective 0.000000e+00, 100 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 43 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 117 - 0.00000 - - 1s 0 0 0.00000 0 20 - 0.00000 - - 1s 0 0 0.00000 0 138 - 0.00000 - - 1s 0 0 0.00000 0 128 - 0.00000 - - 1s 0 0 0.00000 0 16 - 0.00000 - - 2s 0 0 0.00000 0 53 - 0.00000 - - 2s 0 0 0.00000 0 28 - 0.00000 - - 2s 0 0 0.00000 0 88 - 0.00000 - - 2s 0 0 0.00000 0 88 - 0.00000 - - 3s 0 2 0.00000 0 88 - 0.00000 - - 3s * 36 3 14 0.0000000 0.00000 0.0% 110 4s Cutting planes: Clique: 24 Zero half: 5 Explored 37 nodes (31073 simplex iterations) in 4.21 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