current bounds on the number of colors: 0 -- 169 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:59:29 2012 Optimize a model with 63085 rows, 14945 columns and 202944 nonzeros Presolve time: 0.19s Presolved: 63085 rows, 14945 columns, 202944 nonzeros Variable types: 0 continuous, 14945 integer (14945 binary) Root relaxation: objective 0.000000e+00, 632 iterations, 0.05 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 (1026 simplex iterations) in 0.34 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:59:31 2012 Optimize a model with 31627 rows, 7847 columns and 101472 nonzeros Presolve time: 0.14s Presolved: 31627 rows, 7847 columns, 101472 nonzeros Variable types: 0 continuous, 7847 integer (7847 binary) Root relaxation: objective 0.000000e+00, 467 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 (808 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:59:31 2012 Optimize a model with 15898 rows, 4298 columns and 50736 nonzeros Presolve time: 0.06s Presolved: 15898 rows, 4298 columns, 50736 nonzeros Variable types: 0 continuous, 4298 integer (4298 binary) Root relaxation: objective 0.000000e+00, 356 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 (659 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:59:31 2012 Optimize a model with 7659 rows, 2439 columns and 24160 nonzeros Presolve time: 0.02s Presolved: 7659 rows, 2439 columns, 24160 nonzeros Variable types: 0 continuous, 2439 integer (2439 binary) Root relaxation: objective 0.000000e+00, 375 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 (676 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 20:59:32 2012 Optimize a model with 3914 rows, 1594 columns and 12080 nonzeros Presolve time: 0.01s Presolved: 3914 rows, 1594 columns, 12080 nonzeros Variable types: 0 continuous, 1594 integer (1594 binary) Root relaxation: objective 0.000000e+00, 379 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 (2964 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:59:32 2012 Optimize a model with 1667 rows, 1087 columns and 4832 nonzeros Presolve removed 169 rows and 169 columns Presolve time: 0.00s Presolved: 1498 rows, 918 columns, 4494 nonzeros Variable types: 0 continuous, 918 integer (918 binary) Root relaxation: objective 0.000000e+00, 183 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 0 169 - 0.00000 - - 0s Explored 0 nodes (715 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 20:59:32 2012 Optimize a model with 2416 rows, 1256 columns and 7248 nonzeros Presolve time: 0.01s Presolved: 2416 rows, 1256 columns, 7248 nonzeros Variable types: 0 continuous, 1256 integer (1256 binary) Root relaxation: objective 0.000000e+00, 388 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 0 336 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3890 simplex iterations) in 0.45 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 20:59:32 2012 Optimize a model with 3165 rows, 1425 columns and 9664 nonzeros Presolve time: 0.01s Presolved: 3165 rows, 1425 columns, 9664 nonzeros Variable types: 0 continuous, 1425 integer (1425 binary) Root relaxation: objective 0.000000e+00, 396 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 0 320 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 371 - 0.00000 - - 0s 0 0 0.00000 0 388 - 0.00000 - - 1s 0 0 0.00000 0 413 - 0.00000 - - 1s 0 0 0.00000 0 387 - 0.00000 - - 1s 0 2 0.00000 0 387 - 0.00000 - - 2s 849 38 0.00000 17 254 - 0.00000 - 79.2 5s 1111 44 0.00000 17 242 - 0.00000 - 76.6 10s 1123 50 0.00000 14 305 - 0.00000 - 109 15s 1486 60 infeasible 21 - 0.00000 - 128 20s 1945 87 infeasible 24 - 0.00000 - 140 25s 2357 71 infeasible 32 - 0.00000 - 151 30s 2792 42 infeasible 24 - 0.00000 - 158 35s 3218 30 0.00000 21 352 - 0.00000 - 163 40s 3604 20 infeasible 20 - 0.00000 - 168 45s 4025 17 infeasible 29 - 0.00000 - 171 50s Cutting planes: Zero half: 18 Explored 4151 nodes (729614 simplex iterations) in 51.74 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5