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Hi all,
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<div class="">On multiple occasions I have seen ipopt initiating the restoration phase when this does not seem necessary, since the problem seems to be converging (the primal infeasibility is decreasing). Moreover, after the restoration phase has completed,
the solution is worse than before. This effectively causes my optimizations not to converge.</div>
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<div class="">See e.g. below where the objective, primal and dual infeasibilities are smaller before restoration (iteration 310) than after (iteration 330). Is there</div>
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<div class="">Can someone explain why the restoration phase is initiated and why it is allowed to terminate with a worse result than the initial result? I thought its purpose is to reduce the primal infeasibility, which it does not seem to do?</div>
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<div class="">Thank you!</div>
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<div class="">Filip </div>
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<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 300 4.9413587e+01 1.39e+01 9.19e+01 -6.3 7.62e+04 - 6.08e-02 5.90e-03h 4</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 301 4.9434016e+01 1.38e+01 9.31e+01 -6.3 7.61e+04 - 6.43e-02 5.32e-03h 6</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 302 4.9439824e+01 1.38e+01 9.28e+01 -6.3 5.42e+04 - 6.23e-03 1.42e-03h 2</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 303 4.9445688e+01 1.37e+01 9.18e+01 -6.3 5.45e+04 - 1.46e-02 1.42e-03h 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 304 4.9462371e+01 1.37e+01 9.24e+01 -6.3 5.53e+04 - 1.56e-03 3.98e-03h 2</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 305 4.9481166e+01 1.36e+01 8.90e+01 -6.3 5.93e+04 - 4.32e-02 4.48e-03h 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 306 4.9502736e+01 1.36e+01 8.87e+01 -6.3 6.90e+04 - 5.57e-04 5.44e-03h 3</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 307 4.9532790e+01 1.34e+01 1.14e+02 -6.3 6.87e+04 - 9.69e-03 7.62e-03h 3</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 308 4.9555527e+01 1.34e+01 1.14e+02 -6.3 6.97e+04 - 1.72e-02 5.87e-03h 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 309 4.9616944e+01 1.32e+01 1.10e+02 -6.3 1.01e+05 - 2.95e-04 1.50e-02h 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 310 4.9911875e+01 1.22e+01 1.15e+02 -6.3 7.60e+04 - 3.04e-04 7.45e-02h 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 311r 4.9911875e+01 1.22e+01 9.99e+02 4.0 0.00e+00 - 0.00e+00 3.72e-07R 3</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 312r 4.9893340e+01 1.22e+01 9.99e+02 4.0 5.87e+11 - 4.52e-09 2.90e-10f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 313r 5.1041288e+01 2.67e+02 9.50e+03 3.3 8.75e+09 - 6.55e-04 6.75e-06f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 314r 6.5746661e+01 5.21e+01 9.49e+03 3.3 3.62e+07 - 1.25e-03 1.56e-03f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 315r 8.9289704e+01 2.21e+02 9.47e+03 3.3 1.73e+07 - 2.66e-03 2.88e-03f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 316r 1.4193131e+02 4.56e+02 9.40e+03 3.3 4.48e+06 - 8.24e-03 8.52e-03f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 317r 1.7319660e+02 4.04e+03 9.34e+03 3.3 1.68e+06 - 6.72e-03 7.90e-03f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 318r 2.5758435e+02 4.35e+02 9.15e+03 3.3 1.00e+06 - 2.15e-02 2.50e-02f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 319r 3.4323045e+02 5.29e+03 8.84e+03 3.3 4.99e+05 - 3.40e-02 3.47e-02f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 320r 5.6263873e+02 3.56e+02 7.79e+03 3.3 2.06e+05 - 1.25e-01 9.60e-02f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 321r 9.1823497e+02 3.70e+04 6.55e+04 3.3 4.41e+04 - 1.24e-01 2.75e-01f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 322r 1.2039772e+03 1.41e+02 3.93e+03 3.3 5.18e+04 - 8.78e-01 3.74e-01f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 323r 1.5456710e+03 1.16e+05 6.62e+03 3.3 8.43e+03 - 7.80e-01 1.00e+00f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 324r 1.5256602e+03 2.62e+01 1.25e+04 3.3 4.72e+03 - 1.00e+00 1.00e+00f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 325r 4.4331694e+02 4.21e+04 1.51e+04 2.6 2.20e+03 - 8.58e-01 8.99e-01f 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 326r 6.7541139e+02 4.89e+04 4.87e+03 2.6 5.59e+03 - 6.66e-01 1.00e+00f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 327r 9.6890867e+02 8.97e+03 1.53e+03 2.6 1.57e+04 - 1.00e+00 1.00e+00f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 328r 9.7454742e+02 1.97e+01 3.14e+03 2.6 6.34e+03 - 1.00e+00 1.00e+00f 1</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 329r 9.5111247e+02 4.17e+01 8.34e+02 2.6 8.46e+02 - 1.00e+00 1.00e+00h 1</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class="">iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls</span></div>
<div style="margin: 0px; font-stretch: normal; font-size: 11px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class="">
<span style="font-variant-ligatures: no-common-ligatures" class=""> 330 9.4599206e+02 4.41e+01 1.51e+02 -6.3 6.78e+06 - 2.80e-03 3.04e-03h 1</span></div>
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