current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:55 2012 Optimize a model with 13320 rows, 1705 columns and 40968 nonzeros Presolve time: 0.05s Presolved: 13320 rows, 1705 columns, 40968 nonzeros Variable types: 0 continuous, 1705 integer (1705 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 (363 simplex iterations) in 0.10 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:55 2012 Optimize a model with 6684 rows, 1129 columns and 20484 nonzeros Presolve time: 0.02s Presolved: 6684 rows, 1129 columns, 20484 nonzeros Variable types: 0 continuous, 1129 integer (1129 binary) Root relaxation: objective 0.000000e+00, 110 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 34 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (956 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:55 2012 Optimize a model with 3366 rows, 841 columns and 10242 nonzeros Presolve time: 0.01s Presolved: 3366 rows, 841 columns, 10242 nonzeros Variable types: 0 continuous, 841 integer (841 binary) Root relaxation: objective 0.000000e+00, 103 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 46 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2472 simplex iterations) in 0.27 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:56 2012 Optimize a model with 5025 rows, 985 columns and 15363 nonzeros Presolve time: 0.01s Presolved: 5025 rows, 985 columns, 15363 nonzeros Variable types: 0 continuous, 985 integer (985 binary) Root relaxation: objective 0.000000e+00, 101 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 53 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 1s 0 0 0.00000 0 129 - 0.00000 - - 1s 0 0 0.00000 0 68 - 0.00000 - - 1s 0 0 0.00000 0 57 - 0.00000 - - 2s 0 0 0.00000 0 90 - 0.00000 - - 2s 0 0 0.00000 0 132 - 0.00000 - - 2s 0 0 0.00000 0 132 - 0.00000 - - 3s 0 2 0.00000 0 132 - 0.00000 - - 4s 43 10 infeasible 15 - 0.00000 - 88.7 5s * 546 2 17 0.0000000 0.00000 0.0% 58.9 6s Cutting planes: Clique: 58 Explored 547 nodes (57606 simplex iterations) in 6.71 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:02 2012 Optimize a model with 3919 rows, 889 columns and 11949 nonzeros Presolve time: 0.01s Presolved: 3919 rows, 889 columns, 11949 nonzeros Variable types: 0 continuous, 889 integer (889 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 56 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2123 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:03 2012 Optimize a model with 4472 rows, 937 columns and 13656 nonzeros Presolve time: 0.01s Presolved: 4472 rows, 937 columns, 13656 nonzeros Variable types: 0 continuous, 937 integer (937 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 42 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 1s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 2s 0 0 0.00000 0 172 - 0.00000 - - 2s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 0 0.00000 0 146 - 0.00000 - - 3s 0 0 0.00000 0 185 - 0.00000 - - 4s 0 0 0.00000 0 185 - 0.00000 - - 4s 0 2 0.00000 0 185 - 0.00000 - - 5s Cutting planes: Clique: 60 Zero half: 14 Explored 17 nodes (33678 simplex iterations) in 5.48 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9