current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:54 2012 Optimize a model with 9871 rows, 1371 columns and 30387 nonzeros Presolve time: 0.04s Presolved: 9871 rows, 1371 columns, 30387 nonzeros Variable types: 0 continuous, 1371 integer (1371 binary) Root relaxation: objective 0.000000e+00, 95 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 (235 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:54 2012 Optimize a model with 4723 rows, 898 columns and 14470 nonzeros Presolve time: 0.01s Presolved: 4723 rows, 898 columns, 14470 nonzeros Variable types: 0 continuous, 898 integer (898 binary) Root relaxation: objective 0.000000e+00, 99 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 18 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (858 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:54 2012 Optimize a model with 2383 rows, 683 columns and 7235 nonzeros Presolve time: 0.01s Presolved: 2383 rows, 683 columns, 7235 nonzeros Variable types: 0 continuous, 683 integer (683 binary) Root relaxation: objective 0.000000e+00, 86 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 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2427 simplex iterations) in 0.25 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:55 2012 Optimize a model with 3319 rows, 769 columns and 10129 nonzeros Presolve time: 0.01s Presolved: 3319 rows, 769 columns, 10129 nonzeros Variable types: 0 continuous, 769 integer (769 binary) Root relaxation: objective 0.000000e+00, 86 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 34 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s 0 0 0.00000 0 195 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 159 - 0.00000 - - 1s 0 0 0.00000 0 153 - 0.00000 - - 1s 0 0 0.00000 0 164 - 0.00000 - - 2s 0 0 0.00000 0 185 - 0.00000 - - 2s 0 0 0.00000 0 185 - 0.00000 - - 2s 0 2 0.00000 0 185 - 0.00000 - - 2s Cutting planes: Clique: 36 Zero half: 7 Explored 13 nodes (20792 simplex iterations) in 2.92 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:58 2012 Optimize a model with 3787 rows, 812 columns and 11576 nonzeros Presolve time: 0.01s Presolved: 3787 rows, 812 columns, 11576 nonzeros Variable types: 0 continuous, 812 integer (812 binary) Root relaxation: objective 0.000000e+00, 86 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 42 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 0s Cutting planes: Clique: 6 Explored 0 nodes (1444 simplex iterations) in 0.11 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: 8