current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:58 2012 Optimize a model with 5562 rows, 955 columns and 17226 nonzeros Presolve time: 0.02s Presolved: 5562 rows, 955 columns, 17226 nonzeros Variable types: 0 continuous, 955 integer (955 binary) Root relaxation: objective 0.000000e+00, 83 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 (237 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 -- 18 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:58 2012 Optimize a model with 2799 rows, 631 columns and 8613 nonzeros Presolve time: 0.01s Presolved: 2799 rows, 631 columns, 8613 nonzeros Variable types: 0 continuous, 631 integer (631 binary) Root relaxation: objective 0.000000e+00, 79 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 (563 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:58 2012 Optimize a model with 1264 rows, 451 columns and 3828 nonzeros Presolve time: 0.00s Presolved: 1264 rows, 451 columns, 3828 nonzeros Variable types: 0 continuous, 451 integer (451 binary) Root relaxation: objective 0.000000e+00, 73 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 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1297 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:58 2012 Optimize a model with 1878 rows, 523 columns and 5742 nonzeros Presolve time: 0.00s Presolved: 1878 rows, 523 columns, 5742 nonzeros Variable types: 0 continuous, 523 integer (523 binary) Root relaxation: objective 0.000000e+00, 72 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 34 - 0.00000 - - 0s 0 0 0.00000 0 43 - 0.00000 - - 0s 0 0 0.00000 0 117 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 0s 0 0 0.00000 0 144 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 2 0.00000 0 156 - 0.00000 - - 1s Cutting planes: Clique: 21 Zero half: 8 Explored 7 nodes (11006 simplex iterations) in 1.08 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:59 2012 Optimize a model with 2185 rows, 559 columns and 6699 nonzeros Presolve time: 0.01s Presolved: 2185 rows, 559 columns, 6699 nonzeros Variable types: 0 continuous, 559 integer (559 binary) Root relaxation: objective 0.000000e+00, 72 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 0 0 0.00000 0 49 - 0.00000 - - 0s 0 0 0.00000 0 92 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 84 - 0.00000 - - 0s 0 0 0.00000 0 81 - 0.00000 - - 0s 0 0 0.00000 0 93 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 0s 0 0 0.00000 0 87 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 41 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 0s 0 0 0.00000 0 118 - 0.00000 - - 0s 0 0 0.00000 0 116 - 0.00000 - - 0s 0 0 0.00000 0 111 - 0.00000 - - 1s 0 0 0.00000 0 110 - 0.00000 - - 1s 0 0 0.00000 0 108 - 0.00000 - - 1s 0 0 0.00000 0 85 - 0.00000 - - 1s 0 0 0.00000 0 66 - 0.00000 - - 1s 0 0 0.00000 0 121 - 0.00000 - - 1s 0 0 0.00000 0 121 - 0.00000 - - 1s 0 2 0.00000 0 120 - 0.00000 - - 1s Cutting planes: Clique: 44 Zero half: 5 Explored 88 nodes (23429 simplex iterations) in 2.09 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 17:58:02 2012 Optimize a model with 2492 rows, 595 columns and 7656 nonzeros Presolve time: 0.01s Presolved: 2492 rows, 595 columns, 7656 nonzeros Variable types: 0 continuous, 595 integer (595 binary) Root relaxation: objective 0.000000e+00, 72 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (577 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% optimal solution found: number of colors: 8