current bounds on the number of colors: 0 -- 151 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:15 2012 Optimize a model with 42676 rows, 11892 columns and 138900 nonzeros Presolve time: 0.15s Presolved: 42676 rows, 11892 columns, 138900 nonzeros Variable types: 0 continuous, 11892 integer (11892 binary) Root relaxation: objective 0.000000e+00, 508 iterations, 0.03 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 (824 simplex iterations) in 0.25 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 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:16 2012 Optimize a model with 21130 rows, 6154 columns and 68524 nonzeros Presolve time: 0.11s Presolved: 21130 rows, 6154 columns, 68524 nonzeros Variable types: 0 continuous, 6154 integer (6154 binary) Root relaxation: objective 0.000000e+00, 374 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 (664 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:16 2012 Optimize a model with 10357 rows, 3285 columns and 33336 nonzeros Presolve time: 0.04s Presolved: 10357 rows, 3285 columns, 33336 nonzeros Variable types: 0 continuous, 3285 integer (3285 binary) Root relaxation: objective 0.000000e+00, 305 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 (551 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:16 2012 Optimize a model with 5254 rows, 1926 columns and 16668 nonzeros Presolve time: 0.02s Presolved: 5254 rows, 1926 columns, 16668 nonzeros Variable types: 0 continuous, 1926 integer (1926 binary) Root relaxation: objective 0.000000e+00, 318 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 (594 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 18:49:16 2012 Optimize a model with 2419 rows, 1171 columns and 7408 nonzeros Presolve time: 0.01s Presolved: 2419 rows, 1171 columns, 7408 nonzeros Variable types: 0 continuous, 1171 integer (1171 binary) Root relaxation: objective 0.000000e+00, 353 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (5160 simplex iterations) in 0.30 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 18:49:17 2012 Optimize a model with 1285 rows, 869 columns and 3704 nonzeros Presolve removed 151 rows and 151 columns Presolve time: 0.00s Presolved: 1134 rows, 718 columns, 3402 nonzeros Variable types: 0 continuous, 718 integer (718 binary) Root relaxation: objective 0.000000e+00, 161 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 0 151 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (650 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 18:49:17 2012 Optimize a model with 1852 rows, 1020 columns and 5556 nonzeros Presolve time: 0.00s Presolved: 1852 rows, 1020 columns, 5556 nonzeros Variable types: 0 continuous, 1020 integer (1020 binary) Root relaxation: objective 0.000000e+00, 355 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 396 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 316 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 2s 0 0 0.00000 0 280 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 2 0.00000 0 286 - 0.00000 - - 2s Cutting planes: Zero half: 30 Explored 5 nodes (30230 simplex iterations) in 3.02 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4