current bounds on the number of colors: 0 -- 107 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:21 2012 Optimize a model with 30264 rows, 6240 columns and 96142 nonzeros Presolve time: 0.14s Presolved: 30264 rows, 6240 columns, 96142 nonzeros Variable types: 0 continuous, 6240 integer (6240 binary) Root relaxation: objective 0.000000e+00, 371 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 (624 simplex iterations) in 0.21 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:22 2012 Optimize a model with 14901 rows, 3351 columns and 47164 nonzeros Presolve time: 0.06s Presolved: 14901 rows, 3351 columns, 47164 nonzeros Variable types: 0 continuous, 3351 integer (3351 binary) Root relaxation: objective 0.000000e+00, 260 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 (696 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:22 2012 Optimize a model with 7504 rows, 1960 columns and 23582 nonzeros Presolve time: 0.02s Presolved: 7504 rows, 1960 columns, 23582 nonzeros Variable types: 0 continuous, 1960 integer (1960 binary) Root relaxation: objective 0.000000e+00, 217 iterations, 0.00 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 (427 simplex iterations) in 0.04 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 19:59:22 2012 Optimize a model with 3521 rows, 1211 columns and 10884 nonzeros Presolve time: 0.01s Presolved: 3521 rows, 1211 columns, 10884 nonzeros Variable types: 0 continuous, 1211 integer (1211 binary) Root relaxation: objective 0.000000e+00, 244 iterations, 0.00 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 (575 simplex iterations) in 0.02 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% current bounds on the number of colors: 0 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:23 2012 Optimize a model with 1814 rows, 890 columns and 5442 nonzeros Presolve time: 0.00s Presolved: 1814 rows, 890 columns, 5442 nonzeros Variable types: 0 continuous, 890 integer (890 binary) Root relaxation: objective 0.000000e+00, 245 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 0 162 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2937 simplex iterations) in 0.24 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:23 2012 Optimize a model with 2383 rows, 997 columns and 7256 nonzeros Presolve time: 0.01s Presolved: 2383 rows, 997 columns, 7256 nonzeros Variable types: 0 continuous, 997 integer (997 binary) Root relaxation: objective 0.000000e+00, 238 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 0 210 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 281 - 0.00000 - - 2s 0 0 0.00000 0 281 - 0.00000 - - 2s 0 0 0.00000 0 281 - 0.00000 - - 2s 0 2 0.00000 0 281 - 0.00000 - - 3s Cutting planes: Clique: 10 Zero half: 27 Explored 91 nodes (35114 simplex iterations) in 4.32 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:27 2012 Optimize a model with 2952 rows, 1104 columns and 9070 nonzeros Presolve time: 0.01s Presolved: 2952 rows, 1104 columns, 9070 nonzeros Variable types: 0 continuous, 1104 integer (1104 binary) Root relaxation: objective 0.000000e+00, 231 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 0 202 - 0.00000 - - 0s 0 0 0.00000 0 57 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 7 Zero half: 164 Explored 0 nodes (8390 simplex iterations) in 0.77 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: 5