current bounds on the number of colors: 0 -- 143 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:35 2012 Optimize a model with 35501 rows, 10651 columns and 116227 nonzeros Presolve time: 0.14s Presolved: 35501 rows, 10651 columns, 116227 nonzeros Variable types: 0 continuous, 10651 integer (10651 binary) Root relaxation: objective 0.000000e+00, 464 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 (762 simplex iterations) in 0.22 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 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:35 2012 Optimize a model with 17573 rows, 5503 columns and 57295 nonzeros Presolve time: 0.09s Presolved: 17573 rows, 5503 columns, 57295 nonzeros Variable types: 0 continuous, 5503 integer (5503 binary) Root relaxation: objective 0.000000e+00, 381 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 (656 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:36 2012 Optimize a model with 8609 rows, 2929 columns and 27829 nonzeros Presolve time: 0.03s Presolved: 8609 rows, 2929 columns, 27829 nonzeros Variable types: 0 continuous, 2929 integer (2929 binary) Root relaxation: objective 0.000000e+00, 294 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 (533 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:36 2012 Optimize a model with 4127 rows, 1642 columns and 13096 nonzeros Presolve time: 0.01s Presolved: 4127 rows, 1642 columns, 13096 nonzeros Variable types: 0 continuous, 1642 integer (1642 binary) Root relaxation: objective 0.000000e+00, 311 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 (612 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:36 2012 Optimize a model with 2135 rows, 1070 columns and 6548 nonzeros Presolve time: 0.01s Presolved: 2135 rows, 1070 columns, 6548 nonzeros Variable types: 0 continuous, 1070 integer (1070 binary) Root relaxation: objective 0.000000e+00, 325 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 0.00000 0 150 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4864 simplex iterations) in 0.28 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 18:41:36 2012 Optimize a model with 1139 rows, 784 columns and 3274 nonzeros Presolve removed 143 rows and 143 columns Presolve time: 0.00s Presolved: 996 rows, 641 columns, 2988 nonzeros Variable types: 0 continuous, 641 integer (641 binary) Root relaxation: objective 0.000000e+00, 157 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 0 143 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (605 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 18:41:36 2012 Optimize a model with 1637 rows, 927 columns and 4911 nonzeros Presolve time: 0.00s Presolved: 1637 rows, 927 columns, 4911 nonzeros Variable types: 0 continuous, 927 integer (927 binary) Root relaxation: objective 0.000000e+00, 321 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 0 276 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 384 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 1s 0 0 0.00000 0 271 - 0.00000 - - 1s 0 0 0.00000 0 295 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 2 0.00000 0 294 - 0.00000 - - 1s Cutting planes: Zero half: 29 Explored 3 nodes (17480 simplex iterations) in 1.58 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