current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:28 2012 Optimize a model with 29510 rows, 8902 columns and 96590 nonzeros Presolve time: 0.14s Presolved: 29510 rows, 8902 columns, 96590 nonzeros Variable types: 0 continuous, 8902 integer (8902 binary) Root relaxation: objective 0.000000e+00, 463 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 (746 simplex iterations) in 0.20 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 -- 65 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:28 2012 Optimize a model with 14594 rows, 4612 columns and 47552 nonzeros Presolve time: 0.07s Presolved: 14594 rows, 4612 columns, 47552 nonzeros Variable types: 0 continuous, 4612 integer (4612 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 (579 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:29 2012 Optimize a model with 7362 rows, 2532 columns and 23776 nonzeros Presolve time: 0.03s Presolved: 7362 rows, 2532 columns, 23776 nonzeros Variable types: 0 continuous, 2532 integer (2532 binary) Root relaxation: objective 0.000000e+00, 272 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 (476 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:29 2012 Optimize a model with 3746 rows, 1492 columns and 11888 nonzeros Presolve time: 0.01s Presolved: 3746 rows, 1492 columns, 11888 nonzeros Variable types: 0 continuous, 1492 integer (1492 binary) Root relaxation: objective 0.000000e+00, 281 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 (526 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 18:34:29 2012 Optimize a model with 1938 rows, 972 columns and 5944 nonzeros Presolve time: 0.00s Presolved: 1938 rows, 972 columns, 5944 nonzeros Variable types: 0 continuous, 972 integer (972 binary) Root relaxation: objective 0.000000e+00, 291 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 0 234 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3717 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:29 2012 Optimize a model with 1034 rows, 712 columns and 2972 nonzeros Presolve removed 130 rows and 130 columns Presolve time: 0.00s Presolved: 904 rows, 582 columns, 2712 nonzeros Variable types: 0 continuous, 582 integer (582 binary) Root relaxation: objective 0.000000e+00, 137 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 0 130 - 0.00000 - - 0s Explored 0 nodes (551 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 18:34:29 2012 Optimize a model with 1486 rows, 842 columns and 4458 nonzeros Presolve time: 0.00s Presolved: 1486 rows, 842 columns, 4458 nonzeros Variable types: 0 continuous, 842 integer (842 binary) Root relaxation: objective 0.000000e+00, 301 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 0 250 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 26 Zero half: 221 Explored 0 nodes (4668 simplex iterations) in 0.38 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