current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:49 2012 Optimize a model with 9325 rows, 1345 columns and 28749 nonzeros Presolve time: 0.03s Presolved: 9325 rows, 1345 columns, 28749 nonzeros Variable types: 0 continuous, 1345 integer (1345 binary) Root relaxation: objective 0.000000e+00, 93 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 (343 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:49 2012 Optimize a model with 4463 rows, 872 columns and 13690 nonzeros Presolve time: 0.01s Presolved: 4463 rows, 872 columns, 13690 nonzeros Variable types: 0 continuous, 872 integer (872 binary) Root relaxation: objective 0.000000e+00, 95 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (876 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:49 2012 Optimize a model with 2253 rows, 657 columns and 6845 nonzeros Presolve time: 0.01s Presolved: 2253 rows, 657 columns, 6845 nonzeros Variable types: 0 continuous, 657 integer (657 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 52 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2007 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:02:49 2012 Optimize a model with 3137 rows, 743 columns and 9583 nonzeros Presolve time: 0.01s Presolved: 3137 rows, 743 columns, 9583 nonzeros Variable types: 0 continuous, 743 integer (743 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 40 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 138 - 0.00000 - - 0s 0 0 0.00000 0 193 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 0 0.00000 0 139 - 0.00000 - - 1s 0 0 0.00000 0 133 - 0.00000 - - 1s 0 0 0.00000 0 161 - 0.00000 - - 1s 0 0 0.00000 0 168 - 0.00000 - - 2s 0 0 0.00000 0 161 - 0.00000 - - 2s 0 2 0.00000 0 141 - 0.00000 - - 2s Cutting planes: Clique: 61 Zero half: 1 Explored 17 nodes (24248 simplex iterations) in 2.75 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 18:02:52 2012 Optimize a model with 3579 rows, 786 columns and 10952 nonzeros Presolve time: 0.01s Presolved: 3579 rows, 786 columns, 10952 nonzeros Variable types: 0 continuous, 786 integer (786 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 36 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 92 - 0.00000 - - 0s 0 0 0.00000 0 108 - 0.00000 - - 0s 0 0 0.00000 0 63 - 0.00000 - - 0s 0 0 0.00000 0 47 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 16 - 0.00000 - - 1s 0 0 0.00000 0 61 - 0.00000 - - 1s 0 0 0.00000 0 103 - 0.00000 - - 1s 0 0 0.00000 0 103 - 0.00000 - - 1s H 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 9 Zero half: 5 Explored 0 nodes (17214 simplex iterations) in 1.93 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