current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:01 2012 Optimize a model with 49203 rows, 12495 columns and 159005 nonzeros Presolve time: 0.16s Presolved: 49203 rows, 12495 columns, 159005 nonzeros Variable types: 0 continuous, 12495 integer (12495 binary) Root relaxation: objective 0.000000e+00, 530 iterations, 0.04 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 (877 simplex iterations) in 0.27 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: 0 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:02 2012 Optimize a model with 24360 rows, 6489 columns and 78470 nonzeros Presolve time: 0.13s Presolved: 24360 rows, 6489 columns, 78470 nonzeros Variable types: 0 continuous, 6489 integer (6489 binary) Root relaxation: objective 0.000000e+00, 456 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 (785 simplex iterations) in 0.18 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:02 2012 Optimize a model with 12257 rows, 3563 columns and 39235 nonzeros Presolve time: 0.05s Presolved: 12257 rows, 3563 columns, 39235 nonzeros Variable types: 0 continuous, 3563 integer (3563 binary) Root relaxation: objective 0.000000e+00, 328 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 (601 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:02 2012 Optimize a model with 5887 rows, 2023 columns and 18585 nonzeros Presolve time: 0.02s Presolved: 5887 rows, 2023 columns, 18585 nonzeros Variable types: 0 continuous, 2023 integer (2023 binary) Root relaxation: objective 0.000000e+00, 317 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 (581 simplex iterations) in 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:03 2012 Optimize a model with 2702 rows, 1253 columns and 8260 nonzeros Presolve time: 0.01s Presolved: 2702 rows, 1253 columns, 8260 nonzeros Variable types: 0 continuous, 1253 integer (1253 binary) Root relaxation: objective 0.000000e+00, 345 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 240 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 249 - 0.00000 - - 2s 0 0 0.00000 0 204 - 0.00000 - - 2s 0 0 0.00000 0 202 - 0.00000 - - 2s 0 0 0.00000 0 184 - 0.00000 - - 2s 0 0 0.00000 0 235 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 3s 0 0 0.00000 0 302 - 0.00000 - - 3s 0 0 0.00000 0 302 - 0.00000 - - 3s 0 2 0.00000 0 302 - 0.00000 - - 3s 223 73 0.00000 11 279 - 0.00000 - 94.1 5s 609 148 0.00000 20 367 - 0.00000 - 91.6 10s 949 113 infeasible 31 - 0.00000 - 138 15s 1493 78 0.00000 31 240 - 0.00000 - 152 20s * 1791 1 25 0.0000000 0.00000 0.0% 156 22s Cutting planes: Gomory: 1 Zero half: 12 Explored 1792 nodes (324922 simplex iterations) in 22.85 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% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:25 2012 Optimize a model with 1428 rows, 945 columns and 4130 nonzeros Presolve removed 154 rows and 154 columns Presolve time: 0.00s Presolved: 1274 rows, 791 columns, 3822 nonzeros Variable types: 0 continuous, 791 integer (791 binary) Root relaxation: objective 0.000000e+00, 160 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 0 154 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (654 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:54:26 2012 Optimize a model with 2065 rows, 1099 columns and 6195 nonzeros Presolve time: 0.01s Presolved: 2065 rows, 1099 columns, 6195 nonzeros Variable types: 0 continuous, 1099 integer (1099 binary) Root relaxation: objective 0.000000e+00, 348 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3368 simplex iterations) in 0.32 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4