current bounds on the number of colors: 0 -- 142 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:02 2012 Optimize a model with 34932 rows, 10572 columns and 114452 nonzeros Presolve removed 1 rows and 71 columns Presolve time: 0.14s Presolved: 34931 rows, 10501 columns, 114381 nonzeros Variable types: 0 continuous, 10501 integer (10501 binary) Root relaxation: objective 0.000000e+00, 452 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 (743 simplex iterations) in 0.21 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 18:41:03 2012 Optimize a model with 17292 rows, 5460 columns and 56420 nonzeros Presolve removed 1 rows and 35 columns Presolve time: 0.09s Presolved: 17291 rows, 5425 columns, 56385 nonzeros Variable types: 0 continuous, 5425 integer (5425 binary) Root relaxation: objective 0.000000e+00, 410 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 (706 simplex iterations) in 0.13 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 18:41:03 2012 Optimize a model with 8472 rows, 2904 columns and 27404 nonzeros Presolve removed 1 rows and 17 columns Presolve time: 0.03s Presolved: 8471 rows, 2887 columns, 27387 nonzeros Variable types: 0 continuous, 2887 integer (2887 binary) Root relaxation: objective 0.000000e+00, 320 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 (559 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 18:41:03 2012 Optimize a model with 4062 rows, 1626 columns and 12896 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.01s Presolved: 4061 rows, 1618 columns, 12888 nonzeros Variable types: 0 continuous, 1618 integer (1618 binary) Root relaxation: objective 0.000000e+00, 292 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 (530 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 18:41:04 2012 Optimize a model with 2102 rows, 1058 columns and 6448 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 2101 rows, 1054 columns, 6444 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Root relaxation: objective 0.000000e+00, 350 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 0 258 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1405 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:04 2012 Optimize a model with 1122 rows, 774 columns and 3224 nonzeros Presolve removed 142 rows and 143 columns Presolve time: 0.00s Presolved: 980 rows, 631 columns, 2940 nonzeros Variable types: 0 continuous, 631 integer (631 binary) Root relaxation: objective 0.000000e+00, 149 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 0 141 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (597 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 18:41:04 2012 Optimize a model with 1612 rows, 916 columns and 4836 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1611 rows, 913 columns, 4833 nonzeros Variable types: 0 continuous, 913 integer (913 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 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 305 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 160 Explored 0 nodes (6382 simplex iterations) in 0.52 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