current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:48 2012 Optimize a model with 6992 rows, 1088 columns and 21584 nonzeros Presolve time: 0.02s Presolved: 6992 rows, 1088 columns, 21584 nonzeros Variable types: 0 continuous, 1088 integer (1088 binary) Root relaxation: objective 0.000000e+00, 102 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 (226 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% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:48 2012 Optimize a model with 3332 rows, 708 columns and 10224 nonzeros Presolve time: 0.01s Presolved: 3332 rows, 708 columns, 10224 nonzeros Variable types: 0 continuous, 708 integer (708 binary) Root relaxation: objective 0.000000e+00, 83 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (754 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% current bounds on the number of colors: 0 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:48 2012 Optimize a model with 1502 rows, 518 columns and 4544 nonzeros Presolve time: 0.00s Presolved: 1502 rows, 518 columns, 4544 nonzeros Variable types: 0 continuous, 518 integer (518 binary) Root relaxation: objective 0.000000e+00, 80 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 50 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1202 simplex iterations) in 0.11 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:48 2012 Optimize a model with 2234 rows, 594 columns and 6816 nonzeros Presolve time: 0.01s Presolved: 2234 rows, 594 columns, 6816 nonzeros Variable types: 0 continuous, 594 integer (594 binary) Root relaxation: objective 0.000000e+00, 76 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 57 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1709 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:49 2012 Optimize a model with 2600 rows, 632 columns and 7952 nonzeros Presolve time: 0.01s Presolved: 2600 rows, 632 columns, 7952 nonzeros Variable types: 0 continuous, 632 integer (632 binary) Root relaxation: objective 0.000000e+00, 76 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 61 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 1s 0 0 0.00000 0 152 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 156 - 0.00000 - - 1s 0 2 0.00000 0 156 - 0.00000 - - 2s Cutting planes: Clique: 28 Zero half: 7 Explored 3 nodes (17664 simplex iterations) in 2.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:51 2012 Optimize a model with 2966 rows, 670 columns and 9088 nonzeros Presolve time: 0.01s Presolved: 2966 rows, 670 columns, 9088 nonzeros Variable types: 0 continuous, 670 integer (670 binary) Root relaxation: objective 0.000000e+00, 81 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 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 18 - 0.00000 - - 0s 0 0 0.00000 0 16 - 0.00000 - - 0s 0 0 0.00000 0 29 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 87 - 0.00000 - - 0s 0 0 0.00000 0 87 - 0.00000 - - 1s 0 2 0.00000 0 87 - 0.00000 - - 1s * 116 0 12 0.0000000 0.00000 0.0% 54.8 1s Cutting planes: Clique: 5 Zero half: 7 Explored 117 nodes (17815 simplex iterations) in 1.72 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