current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:06 2012 Optimize a model with 33501 rows, 9543 columns and 109143 nonzeros Presolve time: 0.15s Presolved: 33501 rows, 9543 columns, 109143 nonzeros Variable types: 0 continuous, 9543 integer (9543 binary) Root relaxation: objective 0.000000e+00, 488 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 (794 simplex iterations) in 0.23 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:07 2012 Optimize a model with 16569 rows, 4953 columns and 53757 nonzeros Presolve time: 0.08s Presolved: 16569 rows, 4953 columns, 53757 nonzeros Variable types: 0 continuous, 4953 integer (4953 binary) Root relaxation: objective 0.000000e+00, 334 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 (583 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:07 2012 Optimize a model with 8103 rows, 2658 columns and 26064 nonzeros Presolve time: 0.03s Presolved: 8103 rows, 2658 columns, 26064 nonzeros Variable types: 0 continuous, 2658 integer (2658 binary) Root relaxation: objective 0.000000e+00, 275 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 (517 simplex iterations) in 0.05 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:08 2012 Optimize a model with 4119 rows, 1578 columns and 13032 nonzeros Presolve time: 0.01s Presolved: 4119 rows, 1578 columns, 13032 nonzeros Variable types: 0 continuous, 1578 integer (1578 binary) Root relaxation: objective 0.000000e+00, 294 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 (531 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:08 2012 Optimize a model with 2127 rows, 1038 columns and 6516 nonzeros Presolve time: 0.01s Presolved: 2127 rows, 1038 columns, 6516 nonzeros Variable types: 0 continuous, 1038 integer (1038 binary) Root relaxation: objective 0.000000e+00, 310 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 0 131 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 5 Zero half: 7 Explored 0 nodes (9031 simplex iterations) in 0.68 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 18:37:08 2012 Optimize a model with 1131 rows, 768 columns and 3258 nonzeros Presolve removed 135 rows and 135 columns Presolve time: 0.00s Presolved: 996 rows, 633 columns, 2988 nonzeros Variable types: 0 continuous, 633 integer (633 binary) Root relaxation: objective 0.000000e+00, 144 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 0 135 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (594 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 18:37:08 2012 Optimize a model with 1629 rows, 903 columns and 4887 nonzeros Presolve time: 0.00s Presolved: 1629 rows, 903 columns, 4887 nonzeros Variable types: 0 continuous, 903 integer (903 binary) Root relaxation: objective 0.000000e+00, 310 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 0 266 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 0s 0 0 0.00000 0 353 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 303 - 0.00000 - - 1s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 2 0.00000 0 319 - 0.00000 - - 1s Cutting planes: Zero half: 11 Explored 3 nodes (16570 simplex iterations) in 1.64 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