!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!! !!!!! !!!!! VERIFICATION CHECK: vc-memory-leak !!!!! !!!!! !!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Description: Check that the model has no memory leaks. This is tested using the Valgrind memory debugging tool (http://valgrind.org) by performing a series of energy and force calculations on a randomly distorted face-centered cubic (FCC) cube base structure for both non-periodic and periodic boundary conditions. Separate configurations are tested for each species supported by the model, as well as one containing a random distribution of all species. Configurations used for testing are provided as auxiliary files. Author: Ellad Tadmor ----------------------------------------------------------------------------------------------------- Results for KIM Model : EAM_Dynamo_BonnyTerentyev_2014EAM2_W__MO_626183701337_000 Supported species : H He W random seed = 13 lattice constant (orig) = 3.000 perturbation amplitude = 0.300 number unit cells per side = 2 ----------------------------------------------------------------------------------------------------- MONOATOMIC STRUCTURE (pbc=False)-- Species = H (Configuration in file "config-F-H.xyz") ----------------------------------------------------------------------------------------------------- Energy = 4.32600613415 Forces: 1 -1.48067328e-01 -1.65755881e-01 -1.50735872e-01 2 7.63157426e-02 2.51038061e-02 -1.90691664e-01 3 1.17656515e-01 -2.73570924e-01 -9.12899519e-02 4 -2.98751975e-01 1.18251085e-01 -4.13533596e-02 5 1.28856875e-02 -1.85088019e-01 -1.40445036e-01 6 1.38407828e-01 4.65370400e-03 -1.96882141e-01 7 1.06022534e-01 -3.94420657e-01 -2.37440841e-01 8 -6.45495597e-02 -1.01235328e-01 -4.31837220e-02 9 -1.97152662e-01 -6.00455508e-02 -2.73553340e-01 10 3.40013613e-03 3.14715149e-01 -2.85523659e-01 11 -8.44642276e-02 -1.47582032e-01 -1.00676882e-02 12 -2.77181803e-01 2.24839296e-01 5.39824459e-02 13 5.75354572e-03 -1.29888643e-01 -4.01201748e-01 14 1.69649227e-01 1.93354491e-01 -1.40139875e-01 15 3.60464778e-01 -5.96676941e-02 -1.80619187e-02 16 4.56930832e-02 3.93648186e-01 6.97549437e-02 17 -3.24287062e-01 -2.18732276e-01 3.40909908e-02 18 7.06438664e-02 9.56158206e-02 8.68771519e-02 19 -1.47588825e-02 -2.61239907e-01 2.20751259e-01 20 -1.60084504e-01 8.14400223e-02 1.70972101e-01 21 -5.71147427e-02 -2.99545031e-01 -3.59003224e-04 22 3.89163362e-01 2.55377212e-01 1.98217549e-01 23 2.06321111e-01 -1.00191766e-01 1.92286686e-01 24 -4.35927020e-02 1.59550484e-01 2.04237438e-01 25 -2.88137485e-01 -7.63587761e-02 -1.64819121e-02 26 -6.05674879e-03 3.72972487e-01 -7.22791685e-02 27 2.65520257e-01 -4.21680339e-01 2.70929332e-01 28 -4.70860400e-01 3.99801944e-01 2.05738252e-01 29 -1.38473321e-02 -1.16357821e-01 1.42409202e-01 30 2.02399100e-01 2.55167194e-01 -4.18510159e-03 31 2.03778359e-01 -1.05972754e-01 2.05731603e-01 32 7.48322815e-02 2.22842518e-01 2.57897046e-01 MONOATOMIC STRUCTURE (pbc=True)-- Species = H (Configuration in file "config-T-H.xyz") ----------------------------------------------------------------------------------------------------- Energy = 7.31155828858 Forces: 1 8.91626237e-02 -5.86577476e-02 4.65746323e-02 2 7.22182045e-02 7.37471946e-02 1.07507390e-01 3 8.52961575e-02 6.64971973e-02 -3.94129543e-02 4 7.71464435e-02 1.72350075e-01 -8.64619205e-02 5 6.11430252e-02 3.27087013e-02 1.50098908e-02 6 -8.98626224e-02 1.69701247e-01 1.36313047e-02 7 -1.97031663e-01 -2.76585987e-01 -2.28134496e-01 8 -8.56765102e-02 -9.97937736e-02 -4.00490604e-02 9 -1.21956786e-01 -1.67734192e-01 2.09643438e-02 10 -5.81440325e-03 1.50907486e-01 -1.58878218e-02 11 -8.43232215e-02 -1.48679584e-01 -9.63527090e-03 12 -2.83147446e-02 2.26281089e-03 4.96001701e-02 13 2.19539099e-02 -1.82200423e-01 -1.93141823e-01 14 -9.11613396e-02 6.99332157e-02 -6.90397407e-02 15 1.40376279e-01 -5.80193118e-02 -1.07595716e-02 16 8.90967080e-02 1.56285303e-01 9.49217506e-02 17 5.86631626e-03 -1.35153599e-01 2.35825959e-02 18 9.33171737e-02 9.81728556e-02 8.62600250e-02 19 -6.92434020e-03 7.17881988e-03 2.94571834e-02 20 7.26066808e-02 1.96100621e-01 -6.70389718e-02 21 -7.37343288e-02 -5.93717556e-02 -8.25286972e-03 22 5.01179943e-02 3.30022145e-01 2.39094598e-01 23 -8.86383034e-02 -1.67328053e-01 1.67577269e-03 24 -2.05943600e-02 2.02297057e-01 -8.51295087e-02 25 -7.30851645e-02 -1.20622073e-01 -2.99294127e-02 26 2.66612091e-02 5.57839209e-02 -6.65435050e-02 27 3.26866212e-01 -4.59289640e-01 -4.34435245e-02 28 -3.84560990e-01 3.09519702e-01 -4.20054456e-03 29 -1.39437754e-02 -1.17538210e-01 1.42257258e-01 30 -1.42690397e-02 2.84999541e-02 1.48216747e-02 31 3.10039222e-02 -1.28674385e-01 7.37253745e-02 32 1.37058732e-01 5.76804280e-02 3.79770313e-02 MONOATOMIC STRUCTURE (pbc=False)-- Species = He (Configuration in file "config-F-He.xyz") ----------------------------------------------------------------------------------------------------- Energy = -0.0664677253548 Forces: 1 -7.19077384e-03 2.09756968e-01 2.28181401e-01 2 2.09999284e-02 -1.59900384e-01 -9.49451403e-03 3 4.82107305e-01 2.49579991e-01 -1.32845697e-01 4 3.39344063e-02 -5.14252562e-01 1.74972948e-01 5 2.09794674e-02 3.62644521e-01 1.29568992e+00 6 -1.49935183e-01 -5.20687103e-01 5.57664159e-01 7 -8.75073187e-01 1.12427164e+00 -1.18356921e+00 8 6.34153671e-01 -7.90495362e-01 -1.69095765e-01 9 -1.52011470e-01 9.70975451e-02 -1.75229954e-02 10 -1.60401257e-02 6.33937722e-02 -9.10691422e-02 11 -7.93611055e-01 6.80061587e-01 1.40914920e-01 12 7.91677248e-01 -5.71411822e-01 -2.92530544e-02 13 2.27264725e-02 -4.15426350e-02 -9.57171780e-02 14 2.75540764e-02 3.94548490e-02 -5.46176134e-02 15 -4.57473896e-02 -2.46650257e-02 5.05962260e-02 16 5.95468232e-02 1.65641514e-01 1.43546569e-02 17 5.65689735e-01 6.46848437e-01 -5.35115341e-01 18 -1.00403524e+00 -2.87493798e-01 -4.63633680e-01 19 6.49033812e-01 1.37016785e-01 -5.78888387e-01 20 4.57515325e-01 7.57923305e-01 -1.05270412e-01 21 -3.49336753e-01 2.73078648e-01 1.65939292e+00 22 7.32667475e-02 -1.88403460e-01 -6.07056287e-02 23 -3.53732451e-02 -2.05120092e-01 -1.68165227e-01 24 -2.30305141e-01 -3.77418334e-01 -6.41703950e-01 25 3.04323101e-01 -7.52586777e-01 1.09037685e-01 26 -8.33798643e-01 -4.68307785e-02 8.69137168e-01 27 -5.96334794e-01 -6.22016247e-03 -3.28466698e-01 28 8.57532071e-01 -3.57988159e-01 -5.51126507e-01 29 6.81989692e-02 -5.99168117e-02 -4.33207307e-02 30 8.11783244e-02 1.15222779e-01 -2.22240921e-02 31 -2.28413607e-01 2.15141276e-01 1.61671999e-01 32 1.66789130e-01 -2.32200349e-01 2.01918216e-02 MONOATOMIC STRUCTURE (pbc=True)-- Species = He (Configuration in file "config-T-He.xyz") ----------------------------------------------------------------------------------------------------- Energy = 0.551405841453 Forces: 1 -6.37450524e-01 -2.44037124e-01 2.29897988e-01 2 4.16375590e+00 3.36124536e-01 4.80154286e+00 3 9.88018150e-01 -2.03771958e-01 -5.10583377e-02 4 -6.58592671e-01 -5.17260870e-01 -4.76887947e-01 5 4.62321467e-01 -6.63033902e-02 1.36708354e+00 6 5.52545200e-01 -8.88284159e-01 1.11955757e+00 7 -8.25348189e-01 1.31733498e+00 -1.20522393e+00 8 6.26482465e-01 -7.87923553e-01 -1.67045591e-01 9 -3.93474512e-01 -3.79829544e-01 -4.67385859e-01 10 -1.89356193e-01 -6.32793851e-01 -8.52132540e-01 11 -7.85311280e-01 6.80115197e-01 1.54356165e-01 12 6.87374041e-01 -5.66177764e-01 1.91291449e-01 13 -9.21516698e-02 6.53921980e-01 -6.78401578e-01 14 7.14181973e-01 4.75480890e-01 8.95647068e-02 15 1.25311575e-01 -1.38551979e-01 -3.05567469e-01 16 -4.30110553e-01 1.15473541e+00 -5.91895839e-01 17 5.24510582e-01 6.41025919e-01 -5.04947456e-01 18 -9.91481189e-01 -2.86487759e-01 -4.65173323e-01 19 2.32032497e-01 -6.78588057e-01 -1.12365357e+00 20 -3.59540078e+00 1.49920463e+00 -4.60489909e+00 21 -3.54712008e-01 3.72971667e-01 1.68296447e+00 22 -7.17585507e-02 -2.17269013e-01 -2.92926208e-02 23 -4.84609200e-01 2.65708677e-02 5.04748481e-01 24 -2.50237682e-01 -3.84955729e-01 -7.64017814e-01 25 4.71838327e-01 -7.35917390e-01 1.22185185e-01 26 -6.53359065e-01 5.76440214e-01 1.41463473e+00 27 -7.43969307e-01 -4.29827245e-03 6.17109210e-01 28 1.17999674e+00 -2.13002859e-01 -5.14147793e-01 29 6.81989692e-02 -5.99168117e-02 -4.33207307e-02 30 4.29690951e-01 9.41379938e-02 -1.35428957e-01 31 -3.46267229e-01 2.09703032e-01 2.21576656e-02 32 2.77331754e-01 -1.03239723e+00 6.63386431e-01 MONOATOMIC STRUCTURE (pbc=False)-- Species = W (Configuration in file "config-F-W.xyz") ----------------------------------------------------------------------------------------------------- Energy = 119.656739569 Forces: 1 -1.15031169e+01 -2.57418459e+01 -3.04633939e+01 2 -1.60905571e+01 -2.13178483e+01 -3.65668165e+01 3 1.11238335e+01 -3.42597084e+01 -1.80767973e+01 4 -3.33796511e+01 3.23854067e+01 6.75525221e+00 5 -1.86123089e+01 -2.70968255e+01 -3.54078702e+01 6 1.74619511e+01 2.00645737e+01 -1.82903345e+01 7 2.79583056e+01 -2.33314908e+01 2.45090514e+01 8 2.46736343e+01 2.06859823e+01 6.48162454e+00 9 -2.20959972e+01 -1.48705889e+01 -2.15712620e+01 10 5.26165820e+00 3.11136382e+01 -9.22158435e+00 11 -7.83645211e+00 2.16311725e+01 2.74026590e+01 12 -1.84885388e+01 1.87354898e+01 4.95249250e+00 13 2.99765318e+01 1.62392174e+00 -2.43939705e+01 14 7.44320127e+00 8.31658931e+00 -9.79004107e+00 15 1.87855823e+01 -1.87983816e+01 -1.35202610e+01 16 -1.28719007e+01 2.18861646e+01 -1.29499069e+01 17 -2.74233787e+01 -2.90129409e+01 1.91543529e+01 18 -1.23346939e+01 1.64905391e+01 1.38889163e+01 19 -7.67198943e+00 -1.09310267e+01 2.23334824e+01 20 -1.51036185e+01 -6.40889027e+00 1.84708654e+01 21 1.59953040e+01 -3.16716545e+01 -7.32656418e+00 22 3.02173773e+01 -5.75947565e+00 -2.62620036e+01 23 1.97885793e+01 -2.76591907e+01 2.34359246e+01 24 -1.12855265e+01 -1.81029467e+01 4.24148530e+01 25 -2.15386064e+01 -1.14298284e+01 -1.10043459e+01 26 1.69007616e+01 2.53643613e+01 -7.06153192e+00 27 -1.73094264e+01 -8.09974053e+00 3.03555844e+01 28 -2.24187084e+01 1.74410067e+01 2.09309287e+01 29 -5.41258987e+00 4.82987854e+00 -4.05544522e+01 30 2.66130180e+01 3.57322963e+01 -2.01423803e+00 31 3.84839109e+01 1.90302355e+00 3.24423016e+01 32 -9.30658824e+00 3.62883396e+01 3.09470849e+01 MONOATOMIC STRUCTURE (pbc=True)-- Species = W (Configuration in file "config-T-W.xyz") ----------------------------------------------------------------------------------------------------- Energy = 312.5114192 Forces: 1 1.30347084e+01 -1.83743743e+01 -3.54188662e+01 2 -1.57515443e+01 -2.79031861e+01 -1.44713226e+01 3 7.90211476e+00 -1.95143284e+01 -2.21971396e+01 4 4.72888164e+00 3.87384647e+01 1.63674085e+01 5 -1.52998942e+01 -1.56133684e+01 -2.41830243e+01 6 -1.63627082e+01 2.22996083e+01 -5.86925489e+00 7 -7.10767986e+00 -1.86025860e+01 2.99810754e+01 8 2.49139783e+01 1.88397317e+01 4.09593984e+00 9 1.32369250e+01 -2.77642913e+01 1.30643434e+01 10 6.95511089e+00 2.09730387e+01 3.33213720e+01 11 -9.68778071e+00 2.31936886e+01 2.56248234e+01 12 1.27249604e+01 8.67901445e+00 1.07953528e+01 13 3.40713263e+01 -3.04811446e+00 2.99767628e+01 14 -2.77901620e+01 2.64454215e+01 6.55967029e+00 15 -1.61948988e+01 -2.82830495e+01 -1.18251920e+01 16 -1.43647528e+01 -5.69777345e+00 -1.63979876e+01 17 -2.97753468e+01 -1.92540270e+00 2.05986794e+01 18 -1.29109744e+01 1.53803884e+01 1.57554680e+01 19 -6.13654212e+00 1.67691177e+01 5.68100817e+00 20 2.36909486e+01 -1.80767079e+01 1.14016111e+01 21 1.55532952e+01 -9.38330393e+00 4.61419332e+00 22 -5.46480672e+00 -1.18892147e+01 -3.35123082e+01 23 1.44082632e+01 -1.88830066e+01 1.41322333e+01 24 -6.46432679e+00 -2.73359837e+01 1.84848564e+01 25 9.72158970e+00 -4.85725630e+00 -9.69442933e+00 26 2.44692702e+01 -9.46651390e+00 -5.29566061e+00 27 -2.75428118e+01 -8.02846414e+00 -1.82897779e+01 28 -8.98609563e+00 2.70561709e+01 -1.27060360e+01 29 -2.90389522e+00 6.26253109e+00 -4.08668903e+01 30 1.56246737e+01 2.16153563e+01 -8.14667510e+00 31 3.21246777e+00 -4.45993202e+00 -9.34772962e-01 32 -1.50429391e+00 3.28543255e+01 -6.45460146e-01 MIXED STRUCTURE (pbc=False)-- Species = H He W (Configuration in file "config-F-HHeW.xyz") ----------------------------------------------------------------------------------------------------- Energy = -176.634082884 Forces: 1 9.31952486e-01 3.88363872e+00 8.91356507e-01 2 1.71801433e+00 2.40306559e+00 3.12291533e+00 3 1.67298250e+00 -2.79140423e-01 5.90829316e-01 4 1.78712608e+00 1.99385127e+00 -6.67314907e-02 5 -9.07312719e-01 -1.31028342e+00 6.61632198e-01 6 6.36689970e+00 -6.32235876e+00 -4.71107081e-01 7 -9.35503572e-01 -1.18084637e+00 -3.16212767e+00 8 -6.97290568e+00 -4.18328830e+00 -3.83842451e+00 9 -8.82564881e-01 -1.62931816e+00 -2.31704379e+00 10 -9.70852677e-01 2.19070210e+00 -2.65508305e+00 11 -1.17952653e+01 -1.65241000e+01 1.01723397e+01 12 -1.47429420e+00 8.17286097e+00 -6.76978871e+00 13 -2.08804800e+01 -1.39511537e+01 -2.72050900e+01 14 3.14578467e+01 1.68871302e+01 -1.95876901e+01 15 1.41582154e+01 -2.15040310e+01 5.23517521e+00 16 -2.34180603e+01 3.24584411e+01 3.01533253e+01 17 -7.31146273e-02 1.95811856e-01 1.89007444e-01 18 3.71999913e-01 -1.73605590e+00 2.20884325e+00 19 8.88743751e-02 2.67822714e-01 8.96345920e-02 20 4.64761105e-01 4.14303889e+00 -2.90305415e+00 21 -8.05397111e-01 -4.80169339e-01 -9.94141457e-01 22 2.70007436e+00 1.00419999e+01 8.97315818e+00 23 1.03499015e-01 -1.06899338e+00 1.21541754e+00 24 6.18905575e-01 9.73156117e-02 -5.71137010e+00 25 -1.09768754e+01 -2.42050789e+01 -2.27092777e-01 26 1.03549436e+01 6.31823033e+00 2.75453538e-01 27 -6.94222268e-01 -7.27620682e-01 -4.33627619e+00 28 5.92529764e+00 8.84737672e+00 1.29128992e+01 29 2.80599237e-01 -1.01234058e+00 2.21332742e+00 30 5.36871350e+00 -1.26003716e+00 4.55068985e+00 31 6.76437481e-01 1.30934368e+00 1.30854763e+00 32 -4.26029409e+00 -1.83581357e+00 -4.51953109e+00 MIXED STRUCTURE (pbc=True)-- Species = H He W (Configuration in file "config-T-HHeW.xyz") ----------------------------------------------------------------------------------------------------- Energy = -197.676787872 Forces: 1 3.99153688e+00 2.42340701e+01 -4.46939588e+00 2 -4.78920906e-01 2.01007826e+00 1.70166607e+00 3 1.45102054e+00 1.43279739e+00 2.17507934e-01 4 6.07575403e-01 7.84059309e-01 -1.52661643e+00 5 -2.79381078e+00 1.24499151e+00 -1.37307165e+00 6 3.71818125e+01 -3.26708534e+00 4.19864288e+01 7 -1.04576915e+00 -3.68774717e+00 -2.04305259e+00 8 -6.98038383e+00 -3.94472637e+00 -3.83061448e+00 9 1.90992596e+00 -3.72108554e+00 -7.85375513e-01 10 2.01703539e+00 1.23626788e+00 -1.82377377e+00 11 -1.21502905e+01 -1.51832583e+01 7.18602908e+00 12 1.09006140e+01 -2.95132330e+00 1.10327021e+01 13 -2.12579568e+01 -1.44808560e+01 -3.00844858e+01 14 6.09764438e+00 9.26489384e+00 -2.65633026e+01 15 1.48860784e+01 -2.08960008e+01 4.98203021e+00 16 -1.98346831e+01 3.07583517e+01 2.69897010e+01 17 7.88420167e-01 1.65645072e+00 -4.07574741e-01 18 5.88190115e-01 -1.72117157e+00 2.25878571e+00 19 2.06386805e+00 7.45803063e-01 2.98663509e-01 20 -1.63814407e+00 2.36122936e-01 7.46438474e-01 21 -8.33798078e-01 6.29814735e-01 2.38575141e-01 22 -4.47758926e-01 7.06685027e-01 5.83472666e+00 23 -1.33515124e+00 -1.12532696e+00 -1.45611999e+00 24 -3.22028136e+01 -1.27421343e+00 -4.13931508e+01 25 -8.15037546e+00 -1.62854470e+01 -2.84411634e-01 26 9.33276252e+00 6.81300168e+00 2.03916341e-01 27 2.45794387e-01 -2.69773035e-01 9.44524107e-01 28 6.45591793e+00 3.89283991e+00 2.64434141e+00 29 1.88562406e+00 -7.66554026e-01 4.01984537e+00 30 6.66380983e+00 1.81735366e+00 7.46475553e+00 31 1.00267078e+00 1.56368809e+00 -3.59386475e+00 32 1.07955510e+00 5.47299046e-01 8.84173296e-01 ================================================================================ VALGRIND OUTPUT ================================================================================ ==30731== Memcheck, a memory error detector ==30731== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==30731== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info ==30731== Command: python runner2.py EAM_Dynamo_BonnyTerentyev_2014EAM2_W__MO_626183701337_000 ==30731== ==30731== Syscall param sched_getaffinity(mask) points to unaddressable byte(s) ==30731== at 0x4F3FF2F: sched_getaffinity@@GLIBC_2.3.4 (sched_getaffinity.c:36) ==30731== by 0x705438B: get_num_procs (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==30731== by 0x705447C: blas_get_cpu_number (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==30731== by 0x6E2C077: gotoblas_init (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==30731== by 0x4010732: call_init (dl-init.c:72) ==30731== by 0x4010732: _dl_init (dl-init.c:119) ==30731== by 0x40151FE: dl_open_worker (dl-open.c:522) ==30731== by 0x4FA32DE: _dl_catch_exception (dl-error-skeleton.c:196) ==30731== by 0x40147C9: _dl_open (dl-open.c:605) ==30731== by 0x544CF95: dlopen_doit (dlopen.c:66) ==30731== by 0x4FA32DE: _dl_catch_exception (dl-error-skeleton.c:196) ==30731== by 0x4FA336E: _dl_catch_error (dl-error-skeleton.c:215) ==30731== by 0x544D734: _dlerror_run (dlerror.c:162) ==30731== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==30731== ==30731== ==30731== HEAP SUMMARY: ==30731== in use at exit: 49,538,437 bytes in 4,435 blocks ==30731== total heap usage: 232,549 allocs, 228,114 frees, 132,104,070 bytes allocated ==30731== ==30731== LEAK SUMMARY: ==30731== definitely lost: 0 bytes in 0 blocks ==30731== indirectly lost: 0 bytes in 0 blocks ==30731== possibly lost: 182,735 bytes in 112 blocks ==30731== still reachable: 49,355,702 bytes in 4,323 blocks ==30731== suppressed: 0 bytes in 0 blocks ==30731== Rerun with --leak-check=full to see details of leaked memory ==30731== ==30731== For counts of detected and suppressed errors, rerun with: -v ==30731== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 2534 from 171) ================================================================================ To pass this verification check the number of bytes that are "definitely lost" or "indirectly lost" must be zero. NOTE that Valgrind will typically report non-zero "possibly lost" bytes due to Python's internal memory allocation and garbage collection that it does not monitor. Full Valgrind output written to auxiliary file "valgrind.out" Grade: P Comment: No memory leak detected.