current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:35:11 2012 Optimize a model with 19117 rows, 2191 columns and 58671 nonzeros Presolve time: 0.08s Presolved: 19117 rows, 2191 columns, 58671 nonzeros Variable types: 0 continuous, 2191 integer (2191 binary) Root relaxation: objective 0.000000e+00, 156 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 (353 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:35:11 2012 Optimize a model with 9233 rows, 1421 columns and 28249 nonzeros Presolve time: 0.03s Presolved: 9233 rows, 1421 columns, 28249 nonzeros Variable types: 0 continuous, 1421 integer (1421 binary) Root relaxation: objective 0.000000e+00, 126 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 (821 simplex iterations) in 0.09 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 18:35:12 2012 Optimize a model with 4291 rows, 1036 columns and 13038 nonzeros Presolve time: 0.01s Presolved: 4291 rows, 1036 columns, 13038 nonzeros Variable types: 0 continuous, 1036 integer (1036 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 64 - 0.00000 - - 0s 0 0 0.00000 0 95 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3566 simplex iterations) in 0.49 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 18:35:12 2012 Optimize a model with 6409 rows, 1201 columns and 19557 nonzeros Presolve time: 0.02s Presolved: 6409 rows, 1201 columns, 19557 nonzeros Variable types: 0 continuous, 1201 integer (1201 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 66 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 0.00000 0 215 - 0.00000 - - 1s 0 0 0.00000 0 168 - 0.00000 - - 1s 0 0 0.00000 0 120 - 0.00000 - - 2s 0 0 0.00000 0 141 - 0.00000 - - 2s 0 0 0.00000 0 120 - 0.00000 - - 3s 0 0 0.00000 0 113 - 0.00000 - - 4s 0 0 0.00000 0 187 - 0.00000 - - 5s 0 0 0.00000 0 145 - 0.00000 - - 5s 0 0 0.00000 0 185 - 0.00000 - - 6s 0 0 0.00000 0 185 - 0.00000 - - 6s 0 2 0.00000 0 185 - 0.00000 - - 7s 307 19 0.00000 9 138 - 0.00000 - 99.3 10s 705 39 0.00000 14 100 - 0.00000 - 83.3 15s 710 42 0.00000 6 64 - 0.00000 - 82.7 20s 717 45 0.00000 14 158 - 0.00000 - 132 25s 922 25 0.00000 23 127 - 0.00000 - 134 30s 1265 19 infeasible 26 - 0.00000 - 139 35s * 1287 3 31 0.0000000 0.00000 0.0% 139 35s Cutting planes: Clique: 21 Explored 1288 nodes (220295 simplex iterations) in 35.27 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:35:48 2012 Optimize a model with 4997 rows, 1091 columns and 15211 nonzeros Presolve time: 0.01s Presolved: 4997 rows, 1091 columns, 15211 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 70 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 259 - 0.00000 - - 0s 0 0 0.00000 0 309 - 0.00000 - - 1s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 0 0.00000 0 284 - 0.00000 - - 3s 0 0 0.00000 0 306 - 0.00000 - - 5s 0 0 0.00000 0 301 - 0.00000 - - 6s 0 0 0.00000 0 318 - 0.00000 - - 7s 0 0 0.00000 0 318 - 0.00000 - - 7s 0 2 0.00000 0 318 - 0.00000 - - 8s Cutting planes: Clique: 108 Zero half: 12 Explored 5 nodes (35323 simplex iterations) in 8.57 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:35:56 2012 Optimize a model with 5703 rows, 1146 columns and 17384 nonzeros Presolve time: 0.02s Presolved: 5703 rows, 1146 columns, 17384 nonzeros Variable types: 0 continuous, 1146 integer (1146 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 73 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 155 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 2s 0 0 0.00000 0 210 - 0.00000 - - 3s 0 0 0.00000 0 254 - 0.00000 - - 4s 0 0 0.00000 0 254 - 0.00000 - - 4s 0 2 0.00000 0 222 - 0.00000 - - 5s Cutting planes: Clique: 132 Zero half: 5 Explored 53 nodes (39367 simplex iterations) in 6.96 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9