<div dir="ltr"><div class="gmail_quote"><div dir="ltr">Dear Professor Belotti:<div><br></div><div>Thanks. Here, the process does not stop, and it seems the solver started to solving the problem as I see as below:</div><div><br></div><div><div>Couenne 0.4.7 -- an Open-Source solver for Mixed Integer Nonlinear Optimization</div><div>Mailing list: <a href="mailto:couenne@list.coin-or.org" target="_blank">couenne@list.coin-or.org</a></div><div>Instructions: <a href="http://www.coin-or.org/Couenne" target="_blank">http://www.coin-or.org/Couenne</a></div><div>couenne: </div><div>ANALYSIS TEST: Error in an AMPL evaluation. Run with "halt_on_ampl_error yes" to see details.</div><div>NLP0012I </div><div> Num Status Obj It time Location</div><div>NLP0014I 1 OPT -3.1881391 235 135.822</div><div>NLP0014I 2 INFEAS -1.320643 0 0</div><div>NLP0014I * 1 INFEAS -1.320643 0 0 resolve robustness</div><div>Coin0506I Presolve 3179 (-898) rows, 1349 (-910) columns and 8979 (-1807) elements</div><div>Clp0006I 0 Obj -9.99e+012 Primal inf 2372.9528 (1)</div><div>Clp0006I 138 Obj -9.99e+012 Primal inf 1099.1554 (131)</div><div>Clp0006I 223 Obj -9.99e+012</div><div>Clp0000I Optimal - objective value -9.99e+012</div><div>Clp0032I Optimal objective -9.99e+012 - 223 iterations time 0.032, Presolve 0.01</div><div>Clp0000I Optimal - objective value -9.99e+012</div><div>NLP0014I 4 INFEAS 1.3263245 0 0</div><div>Clp0000I Optimal - objective value -9.99e+012</div><div>Cbc0031I 336 added rows had average density of 2</div><div>Cbc0013I At root node, 336 cuts changed objective from -9.99e+012 to -9.99e+012 in 20 passes</div><div>Cbc0014I Cut generator 0 (Couenne convexifier cuts) - 3019 row cuts average 2.0 elements, 10812 column cuts (11093 active)</div><div>Cbc0010I After 0 nodes, 0 on tree, 1e+050 best solution, best possible -9.99e+012 (6.08 seconds)</div><div>Cbc0010I After 100 nodes, 50 on tree, 1e+050 best solution, best possible -9.99e+012 (84.05 seconds)</div><div>Cbc0010I After 200 nodes, 100 on tree, 1e+050 best solution, best possible -9.99e+012 (102.63 seconds)</div><div>Cbc0010I After 300 nodes, 150 on tree, 1e+050 best solution, best possible -9.99e+012 (119.17 seconds)</div><div>Cbc0010I After 400 nodes, 198 on tree, 1e+050 best solution, best possible -9.99e+012 (132.94 seconds)</div><div>Cbc0010I After 500 nodes, 248 on tree, 1e+050 best solution, best possible -9.99e+012 (145.55 seconds)</div><div>Cbc0010I After 600 nodes, 297 on tree, 1e+050 best solution, best possible -9.99e+012 (156.68 seconds)</div><div>Cbc0010I After 700 nodes, 346 on tree, 1e+050 best solution, best possible -9612.0257 (166.73 seconds)</div><div>Cbc0004I Integer solution of -0.17079602 found after 449099 iterations and 756 nodes (170.34 seconds)</div><div>Cbc0010I After 800 nodes, 391 on tree, -0.17079602 best solution, best possible -9477.0925 (181.09 seconds)</div><div>Cbc0010I After 900 nodes, 431 on tree, -0.17079602 best solution, best possible -9477.0925 (200.92 seconds)</div><div>Cbc0010I After 1000 nodes, 478 on tree, -0.17079602 best solution, best possible -9477.0925 (215.48 seconds)</div><div>Cbc0004I Integer solution of -0.28410845 found after 642844 iterations and 1052 nodes (219.02 seconds)</div><div>Cbc0010I After 1100 nodes, 503 on tree, -0.28410845 best solution, best possible -3934.8276 (229.48 seconds)</div><div>Cbc0010I After 1200 nodes, 541 on tree, -0.28410845 best solution, best possible -3934.8276 (246.86 seconds)</div><div>Cbc0010I After 1300 nodes, 589 on tree, -0.28410845 best solution, best possible -3934.8276 (253.94 seconds)</div><div>Cbc0010I After 1400 nodes, 632 on tree, -0.28410845 best solution, best possible -3464.7821 (284.70 seconds)</div><div>Cbc0010I After 1500 nodes, 682 on tree, -0.28410845 best solution, best possible -3464.7821 (315.72 seconds)</div><div>Cbc0010I After 1600 nodes, 725 on tree, -0.28410845 best solution, best possible -3464.7821 (365.02 seconds)</div><div>Cbc0010I After 1700 nodes, 775 on tree, -0.28410845 best solution, best possible -3464.7821 (381.84 seconds)</div><div>Cbc0004I Integer solution of -0.69549452 found after 1162777 iterations and 1752 nodes (384.45 seconds)</div><div>Cbc0010I After 1800 nodes, 718 on tree, -0.69549452 best solution, best possible -1497.1288 (394.14 seconds)</div><div>Cbc0010I After 1900 nodes, 768 on tree, -0.69549452 best solution, best possible -1497.1288 (426.08 seconds)</div><div>Cbc0010I After 2000 nodes, 816 on tree, -0.69549452 best solution, best possible -1497.1288 (456.98 seconds)</div><div>Cbc0010I After 2100 nodes, 866 on tree, -0.69549452 best solution, best possible -1497.1288 (474.26 seconds)</div><div>Cbc0010I After 2200 nodes, 916 on tree, -0.69549452 best solution, best possible -1497.1288 (482.93 seconds)</div><div>Cbc0010I After 2300 nodes, 955 on tree, -0.69549452 best solution, best possible -1437.8282 (491.52 seconds)</div><div>Cbc0010I After 2400 nodes, 985 on tree, -0.69549452 best solution, best possible -1278.9137 (509.34 seconds)</div><div>Cbc0010I After 2500 nodes, 1027 on tree, -0.69549452 best solution, best possible -1278.9137 (537.75 seconds)</div><div>Cbc0010I After 2600 nodes, 1073 on tree, -0.69549452 best solution, best possible -1278.9137 (550.88 seconds)</div><div>Cbc0010I After 2700 nodes, 1122 on tree, -0.69549452 best solution, best possible -1278.9137 (558.45 seconds)</div><div>Cbc0010I After 2800 nodes, 1151 on tree, -0.69549452 best solution, best possible -1008.0625 (571.40 seconds)</div><div>Cbc0010I After 2900 nodes, 1187 on tree, -0.69549452 best solution, best possible -944.50195 (594.32 seconds)</div><div>Cbc0010I After 3000 nodes, 1231 on tree, -0.69549452 best solution, best possible -944.50195 (649.49 seconds)</div><div>Cbc0010I After 3100 nodes, 1280 on tree, -0.69549452 best solution, best possible -944.50195 (660.08 seconds)</div><div>Cbc0010I After 3200 nodes, 1322 on tree, -0.69549452 best solution, best possible -935.30606 (702.94 seconds)</div><div>Cbc0010I After 3300 nodes, 1371 on tree, -0.69549452 best solution, best possible -935.30606 (729.48 seconds)</div><div>Cbc0010I After 3400 nodes, 1415 on tree, -0.69549452 best solution, best possible -935.30606 (747.84 seconds)</div><div>Cbc0010I After 3500 nodes, 1465 on tree, -0.69549452 best solution, best possible -935.30606 (758.22 seconds)</div><div>Cbc0010I After 3600 nodes, 1510 on tree, -0.69549452 best solution, best possible -935.30606 (765.43 seconds)</div><div>Cbc0010I After 3700 nodes, 1551 on tree, -0.69549452 best solution, best possible -905.19719 (788.05 seconds)</div><div>Cbc0010I After 3800 nodes, 1595 on tree, -0.69549452 best solution, best possible -905.19719 (822.52 seconds)</div><div>Cbc0010I After 3900 nodes, 1645 on tree, -0.69549452 best solution, best possible -905.19719 (851.35 seconds)</div><div>Cbc0010I After 4000 nodes, 1689 on tree, -0.69549452 best solution, best possible -905.19719 (866.37 seconds)</div><div>Cbc0010I After 4100 nodes, 1718 on tree, -0.69549452 best solution, best possible -873.84957 (876.74 seconds)</div><div>Cbc0010I After 4200 nodes, 1761 on tree, -0.69549452 best solution, best possible -855.04626 (900.88 seconds)</div><div>Cbc0010I After 4300 nodes, 1804 on tree, -0.69549452 best solution, best possible -855.04626 (919.96 seconds)</div><div>Cbc0010I After 4400 nodes, 1854 on tree, -0.69549452 best solution, best possible -855.04626 (929.08 seconds)</div><div>Cbc0010I After 4500 nodes, 1900 on tree, -0.69549452 best solution, best possible -833.78802 (995.90 seconds)</div><div>Cbc0010I After 4600 nodes, 1943 on tree, -0.69549452 best solution, best possible -833.78802 (1051.57 seconds)</div><div>Cbc0010I After 4700 nodes, 1993 on tree, -0.69549452 best solution, best possible -833.78802 (1063.96 seconds)</div><div>Cbc0010I After 4800 nodes, 2043 on tree, -0.69549452 best solution, best possible -833.78802 (1072.19 seconds)</div><div>Cbc0010I After 4900 nodes, 2061 on tree, -0.69549452 best solution, best possible -783.39437 (1085.38 seconds)</div><div>Cbc0010I After 5000 nodes, 2093 on tree, -0.69549452 best solution, best possible -783.39437 (1098.21 seconds)</div><div>Cbc0010I After 5100 nodes, 2126 on tree, -0.69549452 best solution, best possible -768.08458 (1106.84 seconds)</div><div>Cbc0010I After 5200 nodes, 2156 on tree, -0.69549452 best solution, best possible -766.06154 (1127.18 seconds)</div><div>Cbc0010I After 5300 nodes, 2203 on tree, -0.69549452 best solution, best possible -766.06154 (1153.15 seconds)</div><div>Cbc0010I After 5400 nodes, 2250 on tree, -0.69549452 best solution, best possible -766.06154 (1169.72 seconds)</div><div>Cbc0010I After 5500 nodes, 2300 on tree, -0.69549452 best solution, best possible -766.06154 (1179.17 seconds)</div><div>Cbc0010I After 5600 nodes, 2341 on tree, -0.69549452 best solution, best possible -667.10164 (1205.76 seconds)</div><div>Cbc0010I After 5700 nodes, 2376 on tree, -0.69549452 best solution, best possible -667.10164 (1248.46 seconds)</div><div>Cbc0010I After 5800 nodes, 2426 on tree, -0.69549452 best solution, best possible -667.10164 (1257.34 seconds)</div><div>Cbc0010I After 5900 nodes, 2468 on tree, -0.69549452 best solution, best possible -641.93096 (1271.95 seconds)</div><div>Cbc0010I After 6000 nodes, 2514 on tree, -0.69549452 best solution, best possible -641.93096 (1293.99 seconds)</div><div>Cbc0010I After 6100 nodes, 2562 on tree, -0.69549452 best solution, best possible -641.93096 (1307.85 seconds)</div><div>Cbc0010I After 6200 nodes, 2612 on tree, -0.69549452 best solution, best possible -641.93096 (1315.67 seconds)</div><div>Cbc0004I Integer solution of -0.85560728 found after 4335848 iterations and 6238 nodes (1317.68 seconds)</div><div>Cbc0010I After 6300 nodes, 2564 on tree, -0.85560728 best solution, best possible -593.32669 (1325.69 seconds)</div><div>Cbc0010I After 6400 nodes, 2588 on tree, -0.85560728 best solution, best possible -586.96565 (1336.96 seconds)</div><div>Cbc0010I After 6500 nodes, 2625 on tree, -0.85560728 best solution, best possible -559.63963 (1352.55 seconds)</div><div>Cbc0010I After 6600 nodes, 2673 on tree, -0.85560728 best solution, best possible -559.63963 (1403.13 seconds)</div><div>Cbc0010I After 6700 nodes, 2717 on tree, -0.85560728 best solution, best possible -559.63963 (1417.16 seconds)</div><div>Cbc0010I After 6800 nodes, 2763 on tree, -0.85560728 best solution, best possible -559.63963 (1425.13 seconds)</div><div>Cbc0010I After 6900 nodes, 2783 on tree, -0.85560728 best solution, best possible -512.01149 (1437.31 seconds)</div><div>Cbc0010I After 7000 nodes, 2823 on tree, -0.85560728 best solution, best possible -512.01149 (1446.75 seconds)</div><div>Cbc0010I After 7100 nodes, 2848 on tree, -0.85560728 best solution, best possible -479.53076 (1457.94 seconds)</div><div>Cbc0010I After 7200 nodes, 2877 on tree, -0.85560728 best solution, best possible -478.36479 (1523.72 seconds)</div><div>Cbc0010I After 7300 nodes, 2889 on tree, -0.85560728 best solution, best possible -422.51336 (1533.07 seconds)</div><div>Cbc0010I After 7400 nodes, 2912 on tree, -0.85560728 best solution, best possible -414.8513 (1544.09 seconds)</div><div>Cbc0010I After 7500 nodes, 2945 on tree, -0.85560728 best solution, best possible -405.97904 (1563.01 seconds)</div><div>Cbc0010I After 7600 nodes, 2988 on tree, -0.85560728 best solution, best possible -405.97904 (1585.31 seconds)</div><div>Cbc0010I After 7700 nodes, 3036 on tree, -0.85560728 best solution, best possible -405.97904 (1597.65 seconds)</div><div>Cbc0010I After 7800 nodes, 3086 on tree, -0.85560728 best solution, best possible -405.97904 (1605.52 seconds)</div><div>Cbc0004I Integer solution of -0.86007979 found after 5174816 iterations and 7850 nodes (1608.22 seconds)</div><div>Cbc0010I After 7900 nodes, 3109 on tree, -0.86007979 best solution, best possible -378.1229 (1615.11 seconds)</div><div>Cbc0010I After 8000 nodes, 3142 on tree, -0.86007979 best solution, best possible -378.1229 (1623.32 seconds)</div><div>Cbc0010I After 8100 nodes, 3168 on tree, -0.86007979 best solution, best possible -343.23263 (1633.66 seconds)</div><div>Cbc0010I After 8200 nodes, 3208 on tree, -0.86007979 best solution, best possible -316.99206 (1651.68 seconds)</div><div>Cbc0010I After 8300 nodes, 3252 on tree, -0.86007979 best solution, best possible -316.99206 (1670.69 seconds)</div><div>Cbc0010I After 8400 nodes, 3301 on tree, -0.86007979 best solution, best possible -316.99206 (1680.01 seconds)</div><div>Cbc0010I After 8500 nodes, 3347 on tree, -0.86007979 best solution, best possible -290.86435 (1689.88 seconds)</div><div>Cbc0010I After 8600 nodes, 3391 on tree, -0.86007979 best solution, best possible -290.86435 (1710.19 seconds)</div><div>Cbc0010I After 8700 nodes, 3441 on tree, -0.86007979 best solution, best possible -290.86435 (1721.66 seconds)</div><div>Cbc0010I After 8800 nodes, 3486 on tree, -0.86007979 best solution, best possible -290.86435 (1729.22 seconds)</div><div>Cbc0010I After 8900 nodes, 3498 on tree, -0.86007979 best solution, best possible -282.52269 (1736.18 seconds)</div><div>Cbc0010I After 9000 nodes, 3523 on tree, -0.86007979 best solution, best possible -273.70893 (1759.31 seconds)</div><div>Cbc0010I After 9100 nodes, 3542 on tree, -0.86007979 best solution, best possible -271.75999 (1777.07 seconds)</div><div>Cbc0010I After 9200 nodes, 3584 on tree, -0.86007979 best solution, best possible -227.1299 (1806.32 seconds)</div><div>Cbc0010I After 9300 nodes, 3627 on tree, -0.86007979 best solution, best possible -227.1299 (1821.24 seconds)</div><div>Cbc0010I After 9400 nodes, 3677 on tree, -0.86007979 best solution, best possible -227.1299 (1830.11 seconds)</div><div>Cbc0010I After 9500 nodes, 3699 on tree, -0.86007979 best solution, best possible -195.47091 (1837.19 seconds)</div><div>Cbc0010I After 9600 nodes, 3734 on tree, -0.86007979 best solution, best possible -195.47091 (1845.74 seconds)</div><div>Cbc0010I After 9700 nodes, 3765 on tree, -0.86007979 best solution, best possible -186.78569 (1859.93 seconds)</div><div>Cbc0010I After 9800 nodes, 3815 on tree, -0.86007979 best solution, best possible -186.78569 (1869.41 seconds)</div><div>Cbc0010I After 9900 nodes, 3845 on tree, -0.86007979 best solution, best possible -184.55176 (1878.20 seconds)</div><div>Cbc0010I After 10000 nodes, 3876 on tree, -0.86007979 best solution, best possible -183.45646 (1892.51 seconds)</div><div>Cbc0010I After 10100 nodes, 3923 on tree, -0.86007979 best solution, best possible -183.45646 (1904.06 seconds)</div><div>Cbc0010I After 10200 nodes, 3971 on tree, -0.86007979 best solution, best possible -183.45646 (1912.11 seconds)</div><div>Cbc0010I After 10300 nodes, 4010 on tree, -0.86007979 best solution, best possible -182.08362 (1927.32 seconds)</div><div>Cbc0010I After 10400 nodes, 4056 on tree, -0.86007979 best solution, best possible -182.08362 (1937.65 seconds)</div><div>Cbc0010I After 10500 nodes, 4102 on tree, -0.86007979 best solution, best possible -181.67047 (1948.44 seconds)</div><div>Cbc0010I After 10600 nodes, 4144 on tree, -0.86007979 best solution, best possible -181.67047 (1986.52 seconds)</div><div>Cbc0010I After 10700 nodes, 4194 on tree, -0.86007979 best solution, best possible -181.67047 (2011.76 seconds)</div><div>Cbc0010I After 10800 nodes, 4237 on tree, -0.86007979 best solution, best possible -167.59682 (2020.86 seconds)</div><div>Cbc0010I After 10900 nodes, 4281 on tree, -0.86007979 best solution, best possible -167.59682 (2041.47 seconds)</div><div>Cbc0010I After 11000 nodes, 4330 on tree, -0.86007979 best solution, best possible -167.59682 (2052.82 seconds)</div><div>Cbc0010I After 11100 nodes, 4376 on tree, -0.86007979 best solution, best possible -166.82133 (2133.05 seconds)</div></div><div><br></div><div>Thanks you again for your help.</div><div><br></div><div>Noor</div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Thu, Jan 1, 2015 at 10:52 AM, Pietro Belotti <span dir="ltr"><<a href="mailto:petr.7b6@gmail.com" target="_blank">petr.7b6@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Noor,<br>
<br>
first, for future reference please direct all such questions to the<br>
Couenne mailing list, <a href="mailto:couenne@lists.coin-or.org" target="_blank">couenne@lists.coin-or.org</a> in order to receive a<br>
faster response.<br>
<br>
Second, I cannot reproduce that behaviour. If I create a file<br>
couenne.opt and add the same line, any solution will stop after 50<br>
seconds. However, if the problem you have is rather large (more than<br>
1000 variables and/or constraints), it might happen that Couenne is<br>
stuck in the initialization part, i.e., reading and reformulation of<br>
the problem.<br>
<span><font color="#888888"><br>
Pietro<br>
</font></span><div><div><br>
<br>
<br>
On Thu, Jan 1, 2015 at 4:16 PM, Md. Noor-E-Alam <<a href="mailto:mnalam@ualberta.ca" target="_blank">mnalam@ualberta.ca</a>> wrote:<br>
><br>
> Dear Professor Belotti:<br>
><br>
> I am trying to solve a MINLP with AMPL/Couenne, and would like to impose<br>
> time limit. I have done this with a couenne.opt file and following<br>
> statement:<br>
><br>
> time_limit 50<br>
><br>
><br>
> I keep it in same directory, but do not see any effect. It seems that<br>
> Couenne does not consider it. Could you please advise me on this.<br>
><br>
><br>
> Sincerely<br>
><br>
><br>
> Noor<br>
<br>
</div></div></blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br><div><div dir="ltr"><br>Best Regards<br><br>Noor<br><br>Md. Noor-E-Alam<br>Engineering Management<br>Dept. of Mechanical Engineering<br>University of Alberta</div></div>
</font></span></div>
</div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><br>Best Regards<br><br>Noor<br><br>Md. Noor-E-Alam<br>Engineering Management<br>Dept. of Mechanical Engineering<br>University of Alberta</div></div>
</div>