--- Job rentacar Start 08/22/08 02:54:55 GAMS Rev 228 Copyright (C) 1987-2008 GAMS Development. All rights reserved Licensee: Stefan Vigerske G071106/0001CB-LNX Humboldt University Berlin, Numerical Mathematics DC5918 --- Starting compilation --- rentacar.gms(106) 2 Mb --- GDXin=/home/stefan/work/gams/models/LINlib/rentacar.gdx --- rentacar.gms(148) 6 Mb --- Starting execution: elapsed 0:00:00.057 --- rentacar.gms(123) 6 Mb --- Generating MIP model m --- rentacar.gms(124) 8 Mb --- 6,785 rows 9,559 columns 42,021 non-zeroes --- 55 discrete-columns --- rentacar.gms(124) 8 Mb --- Executing COINCBC: elapsed 0:00:00.220 GAMS/CoinCbc 2.1 LP/MIP Solver written by J. Forrest Problem statistics: 9558 columns and 6784 rows. 55 variables have integrality restrictions. Calling CBC main solution routine... Coin Cbc and Clp Solver version 2.10.00, build Jun 21 2008 command line - GAMS/CBC -solve -quit Continuous objective value is 2.81495e+07 - 0.24 seconds 10 fixed, 1 tightened bounds, 9 strengthened rows, 0 substitutions 1 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions 0 fixed, 0 tightened bounds, 4 strengthened rows, 0 substitutions processed model has 1158 rows, 2984 columns (24 integer) and 18181 elements Pass 1: suminf. 0.36196 obj. 4.12374e+08 iterations 630 Pass 2: suminf. 0.00000 obj. 3.924e+08 iterations 109 Solution found of 3.924e+08 Before mini branch and bound, 14 integers at bound fixed and 2222 continuous Full problem 1158 rows 2984 columns, reduced to 435 rows 529 columns Mini branch and bound improved solution from 3.924e+08 to 2.91227e+07 (1.54 seconds) Freeing continuous variables gives a solution of 2.88825e+07 Round again with cutoff of 2.88214e+07 Pass 3: suminf. 1.30808 obj. 2.88214e+07 iterations 151 Pass 4: suminf. 0.00021 obj. 2.88214e+07 iterations 211 Pass 5: suminf. 0.00021 obj. 2.88214e+07 iterations 0 Pass 6: suminf. 0.91276 obj. 2.88214e+07 iterations 127 Pass 7: suminf. 0.35542 obj. 2.88214e+07 iterations 134 Pass 8: suminf. 0.00016 obj. 2.88214e+07 iterations 5 Pass 9: suminf. 0.00016 obj. 2.88214e+07 iterations 0 Pass 10: suminf. 0.74036 obj. 2.88214e+07 iterations 168 Pass 11: suminf. 0.43417 obj. 2.88214e+07 iterations 96 Pass 12: suminf. 0.14695 obj. 2.88214e+07 iterations 213 Pass 13: suminf. 0.00035 obj. 2.88214e+07 iterations 126 Pass 14: suminf. 0.00035 obj. 2.88214e+07 iterations 0 Pass 15: suminf. 0.08604 obj. 2.88214e+07 iterations 77 Pass 16: suminf. 0.53102 obj. 2.88214e+07 iterations 109 Pass 17: suminf. 0.00038 obj. 2.88214e+07 iterations 66 Pass 18: suminf. 0.00038 obj. 2.88214e+07 iterations 0 Pass 19: suminf. 0.56420 obj. 2.88214e+07 iterations 66 Pass 20: suminf. 0.67449 obj. 2.88214e+07 iterations 149 Pass 21: suminf. 0.10291 obj. 2.88214e+07 iterations 115 Pass 22: suminf. 1.08498 obj. 2.88214e+07 iterations 134 Before mini branch and bound, 7 integers at bound fixed and 2335 continuous Mini branch and bound did not improve solution (2.28 seconds) After 2.28 seconds - Feasibility pump exiting with objective of 2.22045e-16 - took 2.28 seconds Integer solution of 6.9416e+07 found by feasibility pump after 0 iterations and 0 nodes (2.64 seconds) Full problem 1158 rows 2984 columns, reduced to 924 rows 2650 columns - too large 34 added rows had average density of 6.11765 At root node, 34 cuts changed objective from 2.82717e+07 to 2.86826e+07 in 8 passes Cut generator 0 (Probing) - 58 row cuts (24 active), 0 column cuts in 0.020 seconds - new frequency is 1 Cut generator 1 (Gomory) - 2 row cuts (0 active), 0 column cuts in 0.016 seconds - new frequency is -100 Cut generator 2 (Knapsack) - 0 row cuts (0 active), 0 column cuts in 0.036 seconds - new frequency is -100 Cut generator 3 (Clique) - 0 row cuts (0 active), 0 column cuts in -0.000 seconds - new frequency is -100 Cut generator 4 (MixedIntegerRounding2) - 8 row cuts (3 active), 0 column cuts in 0.012 seconds - new frequency is -100 Cut generator 5 (FlowCover) - 1 row cuts (0 active), 0 column cuts in 0.048 seconds - new frequency is -100 Cut generator 6 (TwoMirCuts) - 12 row cuts (7 active), 0 column cuts in 0.024 seconds - new frequency is -100 After 0 nodes, 1 on tree, 6.9416e+07 best solution, best possible 2.86826e+07 (3.25 seconds) Search completed - best objective 28882470.94755347, took 1269 iterations and 10 nodes (4.75 seconds) Strong branching done 52 times (3039 iterations), fathomed 1 nodes and fixed 0 variables Maximum depth 4, 0 variables fixed on reduced cost Cuts at root node changed objective from 2.82717e+07 to 2.86826e+07 Probing was tried 13 times and created 61 cuts of which 27 were active after adding rounds of cuts (0.024 seconds) Gomory was tried 8 times and created 2 cuts of which 0 were active after adding rounds of cuts (0.016 seconds) Knapsack was tried 8 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.036 seconds) Clique was tried 8 times and created 0 cuts of which 0 were active after adding rounds of cuts (-0.000 seconds) MixedIntegerRounding2 was tried 8 times and created 8 cuts of which 3 were active after adding rounds of cuts (0.012 seconds) FlowCover was tried 8 times and created 1 cuts of which 0 were active after adding rounds of cuts (0.048 seconds) TwoMirCuts was tried 8 times and created 12 cuts of which 7 were active after adding rounds of cuts (0.024 seconds) 1742 bounds tightened after postprocessing Result - Finished objective 28882470.94755347 after 10 nodes and 1269 iterations - took 5.54 seconds (total time 5.78) Total time 8.08 Solved to optimality. MIP solution: 28882470.95 (10 nodes, 8.09 seconds) Best possible: 28882470.95 Absolute gap: 0 (absolute tolerance optca: 0) Relative gap: 0 (relative tolerance optcr: 0) --- Restarting execution --- rentacar.gms(124) 0 Mb --- Reading solution for model m --- rentacar.gms(124) 6 Mb *** Status: Normal completion --- Job rentacar.gms Stop 08/22/08 02:55:03 elapsed 0:00:08.459