current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:17 2012 Optimize a model with 17524 rows, 2024 columns and 53768 nonzeros Presolve time: 0.07s Presolved: 17524 rows, 2024 columns, 53768 nonzeros Variable types: 0 continuous, 2024 integer (2024 binary) Root relaxation: objective 0.000000e+00, 124 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 (505 simplex iterations) in 0.13 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:18 2012 Optimize a model with 8788 rows, 1348 columns and 26884 nonzeros Presolve time: 0.03s Presolved: 8788 rows, 1348 columns, 26884 nonzeros Variable types: 0 continuous, 1348 integer (1348 binary) Root relaxation: objective 0.000000e+00, 119 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1401 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:18 2012 Optimize a model with 4084 rows, 984 columns and 12408 nonzeros Presolve time: 0.01s Presolved: 4084 rows, 984 columns, 12408 nonzeros Variable types: 0 continuous, 984 integer (984 binary) Root relaxation: objective 0.000000e+00, 104 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 62 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2559 simplex iterations) in 0.36 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: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:18 2012 Optimize a model with 6100 rows, 1140 columns and 18612 nonzeros Presolve time: 0.02s Presolved: 6100 rows, 1140 columns, 18612 nonzeros Variable types: 0 continuous, 1140 integer (1140 binary) Root relaxation: objective 0.000000e+00, 114 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 50 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 1s 0 0 0.00000 0 146 - 0.00000 - - 2s 0 0 0.00000 0 166 - 0.00000 - - 3s 0 0 0.00000 0 213 - 0.00000 - - 3s 0 0 0.00000 0 233 - 0.00000 - - 4s 0 0 0.00000 0 233 - 0.00000 - - 4s 0 2 0.00000 0 233 - 0.00000 - - 5s Cutting planes: Clique: 86 Zero half: 5 Explored 353 nodes (83068 simplex iterations) in 9.77 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:28 2012 Optimize a model with 7444 rows, 1244 columns and 22748 nonzeros Presolve time: 0.02s Presolved: 7444 rows, 1244 columns, 22748 nonzeros Variable types: 0 continuous, 1244 integer (1244 binary) Root relaxation: objective 0.000000e+00, 111 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 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1367 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:22:28 2012 Optimize a model with 6772 rows, 1192 columns and 20680 nonzeros Presolve time: 0.02s Presolved: 6772 rows, 1192 columns, 20680 nonzeros Variable types: 0 continuous, 1192 integer (1192 binary) Root relaxation: objective 0.000000e+00, 112 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 32 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 94 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 1s 0 0 0.00000 0 22 - 0.00000 - - 1s 0 0 0.00000 0 128 - 0.00000 - - 2s 0 0 0.00000 0 109 - 0.00000 - - 2s 0 0 0.00000 0 20 - 0.00000 - - 3s 0 0 0.00000 0 175 - 0.00000 - - 3s 0 0 0.00000 0 224 - 0.00000 - - 4s 0 0 0.00000 0 149 - 0.00000 - - 4s 0 2 0.00000 0 48 - 0.00000 - - 4s 4 4 0.00000 3 141 - 0.00000 - 481 5s * 149 2 17 0.0000000 0.00000 0.0% 66.3 5s Cutting planes: Clique: 28 Zero half: 3 Explored 150 nodes (41962 simplex iterations) in 5.56 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% optimal solution found: number of colors: 10