current bounds on the number of colors: 0 -- 42 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:27 2012 Optimize a model with 8883 rows, 1303 columns and 27405 nonzeros Presolve time: 0.03s Presolved: 8883 rows, 1303 columns, 27405 nonzeros Variable types: 0 continuous, 1303 integer (1303 binary) Root relaxation: objective 0.000000e+00, 88 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 (221 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 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:27 2012 Optimize a model with 4252 rows, 841 columns and 13050 nonzeros Presolve time: 0.01s Presolved: 4252 rows, 841 columns, 13050 nonzeros Variable types: 0 continuous, 841 integer (841 binary) Root relaxation: objective 0.000000e+00, 96 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 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (693 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 18:01:27 2012 Optimize a model with 2147 rows, 631 columns and 6525 nonzeros Presolve time: 0.01s Presolved: 2147 rows, 631 columns, 6525 nonzeros Variable types: 0 continuous, 631 integer (631 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 64 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1402 simplex iterations) in 0.13 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 18:01:27 2012 Optimize a model with 2989 rows, 715 columns and 9135 nonzeros Presolve time: 0.01s Presolved: 2989 rows, 715 columns, 9135 nonzeros Variable types: 0 continuous, 715 integer (715 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 28 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 193 - 0.00000 - - 0s 0 0 0.00000 0 189 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 1s 0 0 0.00000 0 181 - 0.00000 - - 1s 0 0 0.00000 0 175 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 2s 0 0 0.00000 0 178 - 0.00000 - - 2s 0 2 0.00000 0 178 - 0.00000 - - 2s Cutting planes: Clique: 42 Zero half: 1 Explored 9 nodes (20948 simplex iterations) in 2.70 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 18:01:30 2012 Optimize a model with 3410 rows, 757 columns and 10440 nonzeros Presolve time: 0.01s Presolved: 3410 rows, 757 columns, 10440 nonzeros Variable types: 0 continuous, 757 integer (757 binary) Root relaxation: objective 0.000000e+00, 84 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 67 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 0s 0 0 0.00000 0 61 - 0.00000 - - 0s 0 0 0.00000 0 71 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 18 - 0.00000 - - 1s 0 0 0.00000 0 23 - 0.00000 - - 1s 0 0 0.00000 0 69 - 0.00000 - - 1s 0 0 0.00000 0 61 - 0.00000 - - 1s 0 0 0.00000 0 96 - 0.00000 - - 1s 0 0 0.00000 0 96 - 0.00000 - - 1s 0 2 0.00000 0 96 - 0.00000 - - 2s Cutting planes: Clique: 24 Zero half: 7 Explored 227 nodes (31473 simplex iterations) in 3.25 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:33 2012 Optimize a model with 3831 rows, 799 columns and 11745 nonzeros Presolve time: 0.01s Presolved: 3831 rows, 799 columns, 11745 nonzeros Variable types: 0 continuous, 799 integer (799 binary) Root relaxation: objective 0.000000e+00, 85 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (679 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% optimal solution found: number of colors: 9