current bounds on the number of colors: 0 -- 176 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:00:50 2012 Optimize a model with 71016 rows, 16293 columns and 228008 nonzeros Presolve time: 0.22s Presolved: 71016 rows, 16293 columns, 228008 nonzeros Variable types: 0 continuous, 16293 integer (16293 binary) Root relaxation: objective 0.000000e+00, 783 iterations, 0.08 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 (1194 simplex iterations) in 0.41 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 -- 88 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:00:51 2012 Optimize a model with 35596 rows, 8549 columns and 114004 nonzeros Presolve time: 0.15s Presolved: 35596 rows, 8549 columns, 114004 nonzeros Variable types: 0 continuous, 8549 integer (8549 binary) Root relaxation: objective 0.000000e+00, 624 iterations, 0.04 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 (1239 simplex iterations) in 0.27 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:00:52 2012 Optimize a model with 17886 rows, 4677 columns and 57002 nonzeros Presolve time: 0.07s Presolved: 17886 rows, 4677 columns, 57002 nonzeros Variable types: 0 continuous, 4677 integer (4677 binary) Root relaxation: objective 0.000000e+00, 400 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 (731 simplex iterations) in 0.11 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:00:52 2012 Optimize a model with 9031 rows, 2741 columns and 28501 nonzeros Presolve time: 0.03s Presolved: 9031 rows, 2741 columns, 28501 nonzeros Variable types: 0 continuous, 2741 integer (2741 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 (895 simplex iterations) in 0.06 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:00:52 2012 Optimize a model with 4201 rows, 1685 columns and 12955 nonzeros Presolve time: 0.01s Presolved: 4201 rows, 1685 columns, 12955 nonzeros Variable types: 0 continuous, 1685 integer (1685 binary) Root relaxation: objective 0.000000e+00, 391 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 0 205 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4010 simplex iterations) in 0.31 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 23:00:53 2012 Optimize a model with 1786 rows, 1157 columns and 5182 nonzeros Presolve removed 176 rows and 176 columns Presolve time: 0.00s Presolved: 1610 rows, 981 columns, 4830 nonzeros Variable types: 0 continuous, 981 integer (981 binary) Root relaxation: objective 0.000000e+00, 184 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 0 176 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (777 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 23:00:53 2012 Optimize a model with 2591 rows, 1333 columns and 7773 nonzeros Presolve time: 0.01s Presolved: 2591 rows, 1333 columns, 7773 nonzeros Variable types: 0 continuous, 1333 integer (1333 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 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5007 simplex iterations) in 0.60 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 23:00:54 2012 Optimize a model with 3396 rows, 1509 columns and 10364 nonzeros Presolve time: 0.01s Presolved: 3396 rows, 1509 columns, 10364 nonzeros Variable types: 0 continuous, 1509 integer (1509 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 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 428 - 0.00000 - - 0s 0 0 0.00000 0 414 - 0.00000 - - 1s 0 0 0.00000 0 407 - 0.00000 - - 1s 0 0 0.00000 0 435 - 0.00000 - - 1s 0 0 0.00000 0 391 - 0.00000 - - 2s 0 0 0.00000 0 385 - 0.00000 - - 2s 0 0 0.00000 0 383 - 0.00000 - - 3s 0 0 0.00000 0 396 - 0.00000 - - 3s 0 0 0.00000 0 404 - 0.00000 - - 4s 0 0 0.00000 0 404 - 0.00000 - - 4s 0 2 0.00000 0 404 - 0.00000 - - 5s 670 62 0.00000 15 266 - 0.00000 - 117 10s 712 75 0.00000 8 353 - 0.00000 - 116 15s 716 78 0.00000 12 338 - 0.00000 - 115 20s 896 30 0.00000 20 302 - 0.00000 - 168 25s Cutting planes: Gomory: 1 Clique: 2 Zero half: 17 Explored 966 nodes (195405 simplex iterations) in 26.25 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