current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:25 2012 Optimize a model with 18903 rows, 2103 columns and 57928 nonzeros Presolve time: 0.07s Presolved: 18903 rows, 2103 columns, 57928 nonzeros Variable types: 0 continuous, 2103 integer (2103 binary) Root relaxation: objective 0.000000e+00, 145 iterations, 0.02 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 (535 simplex iterations) in 0.14 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:26 2012 Optimize a model with 9478 rows, 1414 columns and 28964 nonzeros Presolve time: 0.03s Presolved: 9478 rows, 1414 columns, 28964 nonzeros Variable types: 0 continuous, 1414 integer (1414 binary) Root relaxation: objective 0.000000e+00, 122 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 46 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1115 simplex iterations) in 0.11 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:26 2012 Optimize a model with 4403 rows, 1043 columns and 13368 nonzeros Presolve time: 0.01s Presolved: 4403 rows, 1043 columns, 13368 nonzeros Variable types: 0 continuous, 1043 integer (1043 binary) Root relaxation: objective 0.000000e+00, 107 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 72 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2790 simplex iterations) in 0.43 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:27 2012 Optimize a model with 6578 rows, 1202 columns and 20052 nonzeros Presolve time: 0.02s Presolved: 6578 rows, 1202 columns, 20052 nonzeros Variable types: 0 continuous, 1202 integer (1202 binary) Root relaxation: objective 0.000000e+00, 119 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 71 - 0.00000 - - 0s 0 0 0.00000 0 53 - 0.00000 - - 0s 0 0 0.00000 0 146 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 164 - 0.00000 - - 3s 0 0 0.00000 0 218 - 0.00000 - - 3s 0 0 0.00000 0 244 - 0.00000 - - 4s 0 0 0.00000 0 244 - 0.00000 - - 4s 0 2 0.00000 0 244 - 0.00000 - - 5s Cutting planes: Clique: 114 Zero half: 1 Explored 43 nodes (37697 simplex iterations) in 6.39 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:33 2012 Optimize a model with 8028 rows, 1308 columns and 24508 nonzeros Presolve time: 0.02s Presolved: 8028 rows, 1308 columns, 24508 nonzeros Variable types: 0 continuous, 1308 integer (1308 binary) Root relaxation: objective 0.000000e+00, 117 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 54 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 73 MIR: 55 Zero half: 65 Explored 0 nodes (1134 simplex iterations) in 0.12 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:27:33 2012 Optimize a model with 7303 rows, 1255 columns and 22280 nonzeros Presolve time: 0.02s Presolved: 7303 rows, 1255 columns, 22280 nonzeros Variable types: 0 continuous, 1255 integer (1255 binary) Root relaxation: objective 0.000000e+00, 122 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 24 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 1s 0 0 0.00000 0 22 - 0.00000 - - 1s 0 0 0.00000 0 93 - 0.00000 - - 2s 0 0 0.00000 0 20 - 0.00000 - - 2s 0 0 0.00000 0 38 - 0.00000 - - 3s 0 0 0.00000 0 137 - 0.00000 - - 3s 0 0 0.00000 0 135 - 0.00000 - - 4s 0 0 0.00000 0 48 - 0.00000 - - 4s * 0 0 0 0.0000000 0.00000 0.0% - 5s Cutting planes: Clique: 16 Zero half: 36 Explored 0 nodes (32853 simplex iterations) in 5.02 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: 10