current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:11 2012 Optimize a model with 51246 rows, 12823 columns and 165438 nonzeros Presolve time: 0.16s Presolved: 51246 rows, 12823 columns, 165438 nonzeros Variable types: 0 continuous, 12823 integer (12823 binary) Root relaxation: objective 0.000000e+00, 578 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 (915 simplex iterations) in 0.29 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:12 2012 Optimize a model with 25701 rows, 6739 columns and 82719 nonzeros Presolve time: 0.13s Presolved: 25701 rows, 6739 columns, 82719 nonzeros Variable types: 0 continuous, 6739 integer (6739 binary) Root relaxation: objective 0.000000e+00, 387 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 (686 simplex iterations) in 0.18 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:13 2012 Optimize a model with 12601 rows, 3619 columns and 40299 nonzeros Presolve time: 0.05s Presolved: 12601 rows, 3619 columns, 40299 nonzeros Variable types: 0 continuous, 3619 integer (3619 binary) Root relaxation: objective 0.000000e+00, 316 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 (602 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:13 2012 Optimize a model with 6051 rows, 2059 columns and 19089 nonzeros Presolve time: 0.02s Presolved: 6051 rows, 2059 columns, 19089 nonzeros Variable types: 0 continuous, 2059 integer (2059 binary) Root relaxation: objective 0.000000e+00, 327 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 (608 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:13 2012 Optimize a model with 2776 rows, 1279 columns and 8484 nonzeros Presolve time: 0.01s Presolved: 2776 rows, 1279 columns, 8484 nonzeros Variable types: 0 continuous, 1279 integer (1279 binary) Root relaxation: objective 0.000000e+00, 359 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 240 - 0.00000 - - 1s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 226 - 0.00000 - - 2s 0 0 0.00000 0 224 - 0.00000 - - 2s 0 0 0.00000 0 210 - 0.00000 - - 2s 0 0 0.00000 0 186 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 3s 0 0 0.00000 0 279 - 0.00000 - - 3s 0 0 0.00000 0 316 - 0.00000 - - 3s 0 0 0.00000 0 316 - 0.00000 - - 3s 0 2 0.00000 0 316 - 0.00000 - - 4s 147 79 0.00000 13 188 - 0.00000 - 99.2 5s 610 196 0.00000 19 347 - 0.00000 - 79.7 10s * 651 174 32 0.0000000 0.00000 0.0% 119 11s Cutting planes: Zero half: 5 Explored 652 nodes (123515 simplex iterations) in 11.77 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 19:00:25 2012 Optimize a model with 1466 rows, 967 columns and 4242 nonzeros Presolve removed 156 rows and 156 columns Presolve time: 0.00s Presolved: 1310 rows, 811 columns, 3930 nonzeros Variable types: 0 continuous, 811 integer (811 binary) Root relaxation: objective 0.000000e+00, 163 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 0 156 - 0.00000 - - 0s Explored 0 nodes (675 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:00:25 2012 Optimize a model with 2121 rows, 1123 columns and 6363 nonzeros Presolve time: 0.01s Presolved: 2121 rows, 1123 columns, 6363 nonzeros Variable types: 0 continuous, 1123 integer (1123 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 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3591 simplex iterations) in 0.33 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