current bounds on the number of colors: 0 -- 160 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:23 2012 Optimize a model with 54080 rows, 13474 columns and 174560 nonzeros Presolve time: 0.17s Presolved: 54080 rows, 13474 columns, 174560 nonzeros Variable types: 0 continuous, 13474 integer (13474 binary) Root relaxation: objective 0.000000e+00, 615 iterations, 0.06 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 (1012 simplex iterations) in 0.32 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 -- 80 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:24 2012 Optimize a model with 27120 rows, 7074 columns and 87280 nonzeros Presolve time: 0.13s Presolved: 27120 rows, 7074 columns, 87280 nonzeros Variable types: 0 continuous, 7074 integer (7074 binary) Root relaxation: objective 0.000000e+00, 478 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 (833 simplex iterations) in 0.19 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:25 2012 Optimize a model with 13640 rows, 3874 columns and 43640 nonzeros Presolve time: 0.05s Presolved: 13640 rows, 3874 columns, 43640 nonzeros Variable types: 0 continuous, 3874 integer (3874 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (621 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:25 2012 Optimize a model with 6900 rows, 2274 columns and 21820 nonzeros Presolve time: 0.02s Presolved: 6900 rows, 2274 columns, 21820 nonzeros Variable types: 0 continuous, 2274 integer (2274 binary) Root relaxation: objective 0.000000e+00, 332 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 (617 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:25 2012 Optimize a model with 3530 rows, 1474 columns and 10910 nonzeros Presolve time: 0.01s Presolved: 3530 rows, 1474 columns, 10910 nonzeros Variable types: 0 continuous, 1474 integer (1474 binary) Root relaxation: objective 0.000000e+00, 366 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 (1807 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:25 2012 Optimize a model with 1508 rows, 994 columns and 4364 nonzeros Presolve removed 160 rows and 160 columns Presolve time: 0.00s Presolved: 1348 rows, 834 columns, 4044 nonzeros Variable types: 0 continuous, 834 integer (834 binary) Root relaxation: objective 0.000000e+00, 168 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 0 160 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (694 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:25 2012 Optimize a model with 2182 rows, 1154 columns and 6546 nonzeros Presolve time: 0.01s Presolved: 2182 rows, 1154 columns, 6546 nonzeros Variable types: 0 continuous, 1154 integer (1154 binary) Root relaxation: objective 0.000000e+00, 369 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 0 316 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 427 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 12 Zero half: 517 Explored 0 nodes (6175 simplex iterations) in 0.62 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:26 2012 Optimize a model with 2856 rows, 1314 columns and 8728 nonzeros Presolve time: 0.01s Presolved: 2856 rows, 1314 columns, 8728 nonzeros Variable types: 0 continuous, 1314 integer (1314 binary) Root relaxation: objective 0.000000e+00, 372 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 0 302 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 388 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 396 - 0.00000 - - 1s 0 0 0.00000 0 396 - 0.00000 - - 1s 0 2 0.00000 0 396 - 0.00000 - - 1s 905 57 0.00000 16 276 - 0.00000 - 64.8 5s 912 61 0.00000 15 303 - 0.00000 - 64.3 10s 917 65 0.00000 16 323 - 0.00000 - 63.9 15s 1481 106 infeasible 24 - 0.00000 - 123 20s * 2058 1 27 0.0000000 0.00000 0.0% 128 24s Cutting planes: Gomory: 1 Zero half: 13 Explored 2059 nodes (276068 simplex iterations) in 24.14 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: 4