current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:36:52 2012 Optimize a model with 20602 rows, 2246 columns and 63126 nonzeros Presolve time: 0.09s Presolved: 20602 rows, 2246 columns, 63126 nonzeros Variable types: 0 continuous, 2246 integer (2246 binary) Root relaxation: objective 0.000000e+00, 150 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 (503 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 18:36:52 2012 Optimize a model with 9948 rows, 1476 columns and 30394 nonzeros Presolve time: 0.03s Presolved: 9948 rows, 1476 columns, 30394 nonzeros Variable types: 0 continuous, 1476 integer (1476 binary) Root relaxation: objective 0.000000e+00, 125 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 18 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1288 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: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:36:52 2012 Optimize a model with 4621 rows, 1091 columns and 14028 nonzeros Presolve time: 0.01s Presolved: 4621 rows, 1091 columns, 14028 nonzeros Variable types: 0 continuous, 1091 integer (1091 binary) Root relaxation: objective 0.000000e+00, 110 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 80 - 0.00000 - - 0s 0 0 0.00000 0 96 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2804 simplex iterations) in 0.40 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 18:36:53 2012 Optimize a model with 6904 rows, 1256 columns and 21042 nonzeros Presolve time: 0.02s Presolved: 6904 rows, 1256 columns, 21042 nonzeros Variable types: 0 continuous, 1256 integer (1256 binary) Root relaxation: objective 0.000000e+00, 127 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 34 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 164 - 0.00000 - - 2s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 0 0.00000 0 245 - 0.00000 - - 4s 0 0 0.00000 0 286 - 0.00000 - - 5s 0 0 0.00000 0 286 - 0.00000 - - 5s 0 2 0.00000 0 286 - 0.00000 - - 6s 171 11 0.00000 11 173 - 0.00000 - 211 10s Cutting planes: Clique: 138 Zero half: 6 Explored 209 nodes (72914 simplex iterations) in 10.69 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 18:37:04 2012 Optimize a model with 8426 rows, 1366 columns and 25718 nonzeros Presolve time: 0.02s Presolved: 8426 rows, 1366 columns, 25718 nonzeros Variable types: 0 continuous, 1366 integer (1366 binary) Root relaxation: objective 0.000000e+00, 127 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 52 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 94 MIR: 31 Zero half: 54 Explored 0 nodes (1415 simplex iterations) in 0.16 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 18:37:04 2012 Optimize a model with 7665 rows, 1311 columns and 23380 nonzeros Presolve time: 0.02s Presolved: 7665 rows, 1311 columns, 23380 nonzeros Variable types: 0 continuous, 1311 integer (1311 binary) Root relaxation: objective 0.000000e+00, 120 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 50 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 116 - 0.00000 - - 1s 0 0 0.00000 0 215 - 0.00000 - - 1s 0 0 0.00000 0 189 - 0.00000 - - 2s 0 0 0.00000 0 51 - 0.00000 - - 3s 0 0 0.00000 0 79 - 0.00000 - - 3s 0 0 0.00000 0 130 - 0.00000 - - 4s 0 0 0.00000 0 203 - 0.00000 - - 5s 0 0 0.00000 0 38 - 0.00000 - - 6s 0 0 0.00000 0 62 - 0.00000 - - 6s 0 0 0.00000 0 62 - 0.00000 - - 7s 0 2 0.00000 0 62 - 0.00000 - - 8s 10 6 0.00000 6 136 - 0.00000 - 247 10s 608 31 0.00000 6 226 - 0.00000 - 81.4 15s 612 34 0.00000 20 204 - 0.00000 - 80.9 20s 644 43 infeasible 25 - 0.00000 - 135 25s * 998 1 36 0.0000000 0.00000 0.0% 136 29s Cutting planes: Clique: 43 Explored 999 nodes (178739 simplex iterations) in 29.37 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