current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:21:59 2012 Optimize a model with 17966 rows, 2041 columns and 55094 nonzeros Presolve time: 0.07s Presolved: 17966 rows, 2041 columns, 55094 nonzeros Variable types: 0 continuous, 2041 integer (2041 binary) Root relaxation: objective 0.000000e+00, 119 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 (450 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:21:59 2012 Optimize a model with 9009 rows, 1365 columns and 27547 nonzeros Presolve time: 0.03s Presolved: 9009 rows, 1365 columns, 27547 nonzeros Variable types: 0 continuous, 1365 integer (1365 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1323 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 18:21:59 2012 Optimize a model with 4186 rows, 1001 columns and 12714 nonzeros Presolve time: 0.01s Presolved: 4186 rows, 1001 columns, 12714 nonzeros Variable types: 0 continuous, 1001 integer (1001 binary) Root relaxation: objective 0.000000e+00, 105 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 88 - 0.00000 - - 0s 0 0 0.00000 0 102 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1617 simplex iterations) in 0.25 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 18:22:00 2012 Optimize a model with 6253 rows, 1157 columns and 19071 nonzeros Presolve time: 0.02s Presolved: 6253 rows, 1157 columns, 19071 nonzeros Variable types: 0 continuous, 1157 integer (1157 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 42 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 1s 0 0 0.00000 0 223 - 0.00000 - - 1s 0 0 0.00000 0 142 - 0.00000 - - 2s 0 0 0.00000 0 183 - 0.00000 - - 2s 0 0 0.00000 0 247 - 0.00000 - - 3s 0 0 0.00000 0 253 - 0.00000 - - 4s 0 0 0.00000 0 253 - 0.00000 - - 4s 0 2 0.00000 0 253 - 0.00000 - - 5s Cutting planes: Clique: 91 Zero half: 5 Explored 65 nodes (37668 simplex iterations) in 6.28 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 18:22:06 2012 Optimize a model with 7631 rows, 1261 columns and 23309 nonzeros Presolve time: 0.02s Presolved: 7631 rows, 1261 columns, 23309 nonzeros Variable types: 0 continuous, 1261 integer (1261 binary) Root relaxation: objective 0.000000e+00, 113 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 38 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (861 simplex iterations) in 0.08 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 18:22:06 2012 Optimize a model with 6942 rows, 1209 columns and 21190 nonzeros Presolve time: 0.02s Presolved: 6942 rows, 1209 columns, 21190 nonzeros Variable types: 0 continuous, 1209 integer (1209 binary) Root relaxation: objective 0.000000e+00, 113 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 0 0 0.00000 0 63 - 0.00000 - - 0s 0 0 0.00000 0 92 - 0.00000 - - 1s 0 0 0.00000 0 235 - 0.00000 - - 1s 0 0 0.00000 0 192 - 0.00000 - - 1s 0 0 0.00000 0 145 - 0.00000 - - 2s 0 0 0.00000 0 95 - 0.00000 - - 3s 0 0 0.00000 0 107 - 0.00000 - - 4s 0 0 0.00000 0 136 - 0.00000 - - 4s 0 0 0.00000 0 89 - 0.00000 - - 5s 0 0 0.00000 0 122 - 0.00000 - - 5s 0 0 0.00000 0 88 - 0.00000 - - 7s 0 2 0.00000 0 88 - 0.00000 - - 7s 104 16 0.00000 17 111 - 0.00000 - 85.2 10s * 221 1 22 0.0000000 0.00000 0.0% 72.1 10s Cutting planes: Clique: 51 Zero half: 3 Explored 222 nodes (55958 simplex iterations) in 10.46 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