current bounds on the number of colors: 0 -- 35 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:35 2012 Optimize a model with 4948 rows, 884 columns and 15334 nonzeros Presolve time: 0.02s Presolved: 4948 rows, 884 columns, 15334 nonzeros Variable types: 0 continuous, 884 integer (884 binary) Root relaxation: objective 0.000000e+00, 84 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 (212 simplex iterations) in 0.03 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 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:35 2012 Optimize a model with 2347 rows, 569 columns and 7216 nonzeros Presolve time: 0.01s Presolved: 2347 rows, 569 columns, 7216 nonzeros Variable types: 0 continuous, 569 integer (569 binary) Root relaxation: objective 0.000000e+00, 70 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 16 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (785 simplex iterations) in 0.03 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:35 2012 Optimize a model with 1191 rows, 429 columns and 3608 nonzeros Presolve time: 0.00s Presolved: 1191 rows, 429 columns, 3608 nonzeros Variable types: 0 continuous, 429 integer (429 binary) Root relaxation: objective 0.000000e+00, 71 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 (1038 simplex iterations) in 0.10 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:35 2012 Optimize a model with 1769 rows, 499 columns and 5412 nonzeros Presolve time: 0.00s Presolved: 1769 rows, 499 columns, 5412 nonzeros Variable types: 0 continuous, 499 integer (499 binary) Root relaxation: objective 0.000000e+00, 70 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 30 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1399 simplex iterations) in 0.09 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:35 2012 Optimize a model with 2058 rows, 534 columns and 6314 nonzeros Presolve time: 0.01s Presolved: 2058 rows, 534 columns, 6314 nonzeros Variable types: 0 continuous, 534 integer (534 binary) Root relaxation: objective 0.000000e+00, 70 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 30 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 135 - 0.00000 - - 0s 0 0 0.00000 0 79 - 0.00000 - - 0s 0 0 0.00000 0 119 - 0.00000 - - 0s 0 0 0.00000 0 79 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 0.00000 0 63 - 0.00000 - - 0s 0 0 0.00000 0 41 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 1s 0 2 0.00000 0 45 - 0.00000 - - 1s Cutting planes: Zero half: 6 Explored 9 nodes (14753 simplex iterations) in 1.38 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 8