current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:36 2012 Optimize a model with 12007 rows, 1601 columns and 36961 nonzeros Presolve time: 0.05s Presolved: 12007 rows, 1601 columns, 36961 nonzeros Variable types: 0 continuous, 1601 integer (1601 binary) Root relaxation: objective 0.000000e+00, 109 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 (400 simplex iterations) in 0.09 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 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:36 2012 Optimize a model with 5767 rows, 1037 columns and 17677 nonzeros Presolve time: 0.02s Presolved: 5767 rows, 1037 columns, 17677 nonzeros Variable types: 0 continuous, 1037 integer (1037 binary) Root relaxation: objective 0.000000e+00, 103 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 (723 simplex iterations) in 0.06 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:36 2012 Optimize a model with 2647 rows, 755 columns and 8035 nonzeros Presolve time: 0.01s Presolved: 2647 rows, 755 columns, 8035 nonzeros Variable types: 0 continuous, 755 integer (755 binary) Root relaxation: objective 0.000000e+00, 94 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 70 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2003 simplex iterations) in 0.23 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:37 2012 Optimize a model with 4207 rows, 896 columns and 12856 nonzeros Presolve time: 0.01s Presolved: 4207 rows, 896 columns, 12856 nonzeros Variable types: 0 continuous, 896 integer (896 binary) Root relaxation: objective 0.000000e+00, 94 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 44 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 117 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 1s 0 0 0.00000 0 89 - 0.00000 - - 1s 0 0 0.00000 0 139 - 0.00000 - - 1s 0 0 0.00000 0 115 - 0.00000 - - 2s 0 0 0.00000 0 108 - 0.00000 - - 2s 0 0 0.00000 0 81 - 0.00000 - - 2s 0 0 0.00000 0 154 - 0.00000 - - 3s 0 0 0.00000 0 127 - 0.00000 - - 3s 0 0 0.00000 0 149 - 0.00000 - - 4s 0 0 0.00000 0 149 - 0.00000 - - 4s 0 2 0.00000 0 149 - 0.00000 - - 4s 29 7 0.00000 9 123 - 0.00000 - 148 5s Cutting planes: Clique: 145 Zero half: 5 Explored 399 nodes (77569 simplex iterations) in 7.82 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:06:44 2012 Optimize a model with 4727 rows, 943 columns and 14463 nonzeros Presolve time: 0.01s Presolved: 4727 rows, 943 columns, 14463 nonzeros Variable types: 0 continuous, 943 integer (943 binary) Root relaxation: objective 0.000000e+00, 99 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 56 - 0.00000 - - 0s 0 0 0.00000 0 71 - 0.00000 - - 0s 0 0 0.00000 0 104 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 93 - 0.00000 - - 1s 0 0 0.00000 0 142 - 0.00000 - - 1s 0 0 0.00000 0 44 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 22 Zero half: 17 Explored 0 nodes (15406 simplex iterations) in 1.71 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% optimal solution found: number of colors: 9