current bounds on the number of colors: 0 -- 140 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:48 2012 Optimize a model with 32760 rows, 10266 columns and 107660 nonzeros Presolve time: 0.15s Presolved: 32760 rows, 10266 columns, 107660 nonzeros Variable types: 0 continuous, 10266 integer (10266 binary) Root relaxation: objective 0.000000e+00, 461 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 (713 simplex iterations) in 0.22 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:48 2012 Optimize a model with 16450 rows, 5366 columns and 53830 nonzeros Presolve time: 0.08s Presolved: 16450 rows, 5366 columns, 53830 nonzeros Variable types: 0 continuous, 5366 integer (5366 binary) Root relaxation: objective 0.000000e+00, 358 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 (619 simplex iterations) in 0.12 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 18:39:49 2012 Optimize a model with 8062 rows, 2846 columns and 26146 nonzeros Presolve time: 0.03s Presolved: 8062 rows, 2846 columns, 26146 nonzeros Variable types: 0 continuous, 2846 integer (2846 binary) Root relaxation: objective 0.000000e+00, 284 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 (500 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 18:39:49 2012 Optimize a model with 3868 rows, 1586 columns and 12304 nonzeros Presolve time: 0.01s Presolved: 3868 rows, 1586 columns, 12304 nonzeros Variable types: 0 continuous, 1586 integer (1586 binary) Root relaxation: objective 0.000000e+00, 310 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 (557 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 18:39:49 2012 Optimize a model with 2004 rows, 1026 columns and 6152 nonzeros Presolve time: 0.01s Presolved: 2004 rows, 1026 columns, 6152 nonzeros Variable types: 0 continuous, 1026 integer (1026 binary) Root relaxation: objective 0.000000e+00, 340 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1430 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:49 2012 Optimize a model with 1072 rows, 746 columns and 3076 nonzeros Presolve removed 140 rows and 140 columns Presolve time: 0.00s Presolved: 932 rows, 606 columns, 2796 nonzeros Variable types: 0 continuous, 606 integer (606 binary) Root relaxation: objective 0.000000e+00, 143 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 0 140 - 0.00000 - - 0s Explored 0 nodes (584 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 18:39:49 2012 Optimize a model with 1538 rows, 886 columns and 4614 nonzeros Presolve time: 0.00s Presolved: 1538 rows, 886 columns, 4614 nonzeros Variable types: 0 continuous, 886 integer (886 binary) Root relaxation: objective 0.000000e+00, 321 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 0 274 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 297 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 357 - 0.00000 - - 1s 0 0 0.00000 0 359 - 0.00000 - - 1s 0 0 0.00000 0 359 - 0.00000 - - 1s 0 2 0.00000 0 359 - 0.00000 - - 1s Cutting planes: Clique: 2 Zero half: 16 Explored 7 nodes (18875 simplex iterations) in 1.78 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4