current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:15 2012 Optimize a model with 15400 rows, 1864 columns and 47300 nonzeros Presolve time: 0.06s Presolved: 15400 rows, 1864 columns, 47300 nonzeros Variable types: 0 continuous, 1864 integer (1864 binary) Root relaxation: objective 0.000000e+00, 139 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 (441 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:15 2012 Optimize a model with 7418 rows, 1214 columns and 22704 nonzeros Presolve time: 0.02s Presolved: 7418 rows, 1214 columns, 22704 nonzeros Variable types: 0 continuous, 1214 integer (1214 binary) Root relaxation: objective 0.000000e+00, 113 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (842 simplex iterations) in 0.08 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:16 2012 Optimize a model with 3734 rows, 914 columns and 11352 nonzeros Presolve time: 0.01s Presolved: 3734 rows, 914 columns, 11352 nonzeros Variable types: 0 continuous, 914 integer (914 binary) Root relaxation: objective 0.000000e+00, 100 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 76 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2509 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 - current bounds on the number of colors: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:16 2012 Optimize a model with 5576 rows, 1064 columns and 17028 nonzeros Presolve time: 0.02s Presolved: 5576 rows, 1064 columns, 17028 nonzeros Variable types: 0 continuous, 1064 integer (1064 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 28 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 94 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 118 - 0.00000 - - 1s 0 0 0.00000 0 152 - 0.00000 - - 1s 0 0 0.00000 0 92 - 0.00000 - - 2s 0 0 0.00000 0 108 - 0.00000 - - 2s 0 0 0.00000 0 94 - 0.00000 - - 3s 0 0 0.00000 0 105 - 0.00000 - - 3s 0 0 0.00000 0 93 - 0.00000 - - 4s 0 2 0.00000 0 93 - 0.00000 - - 4s 6 4 0.00000 4 127 - 0.00000 - 278 5s 679 21 0.00000 12 124 - 0.00000 - 95.3 10s 711 25 0.00000 0 106 - 0.00000 - 94.4 15s 719 31 0.00000 17 174 - 0.00000 - 133 20s 851 11 0.00000 25 104 - 0.00000 - 146 25s 1116 18 0.00000 25 129 - 0.00000 - 160 30s 1372 8 0.00000 25 84 - 0.00000 - 172 35s 1699 7 0.00000 25 105 - 0.00000 - 173 40s Cutting planes: Clique: 9 Zero half: 3 Explored 1883 nodes (360060 simplex iterations) in 42.86 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:59 2012 Optimize a model with 6190 rows, 1114 columns and 18920 nonzeros Presolve time: 0.02s Presolved: 6190 rows, 1114 columns, 18920 nonzeros Variable types: 0 continuous, 1114 integer (1114 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 42 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (877 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% optimal solution found: number of colors: 10