current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:32:02 2012 Optimize a model with 19845 rows, 2191 columns and 60831 nonzeros Presolve time: 0.08s Presolved: 19845 rows, 2191 columns, 60831 nonzeros Variable types: 0 continuous, 2191 integer (2191 binary) Root relaxation: objective 0.000000e+00, 130 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 (520 simplex iterations) in 0.15 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:32:02 2012 Optimize a model with 9583 rows, 1435 columns and 29289 nonzeros Presolve time: 0.03s Presolved: 9583 rows, 1435 columns, 29289 nonzeros Variable types: 0 continuous, 1435 integer (1435 binary) Root relaxation: objective 0.000000e+00, 115 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1392 simplex iterations) in 0.13 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 18:32:02 2012 Optimize a model with 4452 rows, 1057 columns and 13518 nonzeros Presolve time: 0.01s Presolved: 4452 rows, 1057 columns, 13518 nonzeros Variable types: 0 continuous, 1057 integer (1057 binary) Root relaxation: objective 0.000000e+00, 108 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 84 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2177 simplex iterations) in 0.34 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 18:32:03 2012 Optimize a model with 6651 rows, 1219 columns and 20277 nonzeros Presolve time: 0.02s Presolved: 6651 rows, 1219 columns, 20277 nonzeros Variable types: 0 continuous, 1219 integer (1219 binary) Root relaxation: objective 0.000000e+00, 121 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 70 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 1s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 152 - 0.00000 - - 2s 0 0 0.00000 0 170 - 0.00000 - - 2s 0 0 0.00000 0 188 - 0.00000 - - 3s 0 0 0.00000 0 189 - 0.00000 - - 4s 0 0 0.00000 0 189 - 0.00000 - - 4s 0 2 0.00000 0 189 - 0.00000 - - 5s 296 18 0.00000 14 156 - 0.00000 - 154 10s 648 4 0.00000 11 157 - 0.00000 - 154 15s Cutting planes: Clique: 117 Zero half: 6 Explored 665 nodes (130566 simplex iterations) in 15.29 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 18:32:18 2012 Optimize a model with 8117 rows, 1327 columns and 24783 nonzeros Presolve time: 0.02s Presolved: 8117 rows, 1327 columns, 24783 nonzeros Variable types: 0 continuous, 1327 integer (1327 binary) Root relaxation: objective 0.000000e+00, 114 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 44 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 36 MIR: 22 Zero half: 36 Explored 0 nodes (1233 simplex iterations) in 0.13 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 18:32:18 2012 Optimize a model with 7384 rows, 1273 columns and 22530 nonzeros Presolve time: 0.02s Presolved: 7384 rows, 1273 columns, 22530 nonzeros Variable types: 0 continuous, 1273 integer (1273 binary) Root relaxation: objective 0.000000e+00, 116 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 47 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 1s 0 0 0.00000 0 193 - 0.00000 - - 1s 0 0 0.00000 0 97 - 0.00000 - - 1s 0 0 0.00000 0 112 - 0.00000 - - 2s 0 0 0.00000 0 76 - 0.00000 - - 3s 0 0 0.00000 0 84 - 0.00000 - - 3s 0 0 0.00000 0 28 - 0.00000 - - 4s 0 0 0.00000 0 31 - 0.00000 - - 4s 0 0 0.00000 0 155 - 0.00000 - - 5s 0 0 0.00000 0 148 - 0.00000 - - 6s 0 2 0.00000 0 148 - 0.00000 - - 6s H 209 2 0.0000000 0.00000 0.0% 64.7 8s Cutting planes: Clique: 20 Zero half: 2 Explored 209 nodes (48633 simplex iterations) in 8.85 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