!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!! !!!!! !!!!! 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_IMD_BrommerGaehler_2006B_AlNiCo__MO_128037485276_003 Supported species : Al Co Ni random seed = 13 lattice constant (orig) = 3.000 perturbation amplitude = 0.300 number unit cells per side = 2 ----------------------------------------------------------------------------------------------------- MONOATOMIC STRUCTURE (pbc=False)-- Species = Al (Configuration in file "config-F-Al.xyz") ----------------------------------------------------------------------------------------------------- Energy = 386.665364189 Forces: 1 -3.97235773e+01 -8.57751818e+01 -6.80406553e+01 2 -4.35927172e+01 -3.66784309e+01 -1.73216520e+02 3 -2.06322079e+01 -1.67013314e+02 -4.34418421e+01 4 -1.56138152e+02 -8.43177540e+00 2.74422630e+01 5 3.70879554e+01 -1.06633555e+02 -6.94159121e+01 6 4.91052965e+01 -9.55091893e+00 -6.71674708e+01 7 1.24742816e+02 -2.20262099e+02 -2.46436321e+02 8 1.67329335e+01 -1.26014880e+02 -4.69876062e+01 9 -7.75605331e+01 3.78065215e+01 -1.24869954e+02 10 -7.59490242e+01 2.09531142e+02 -2.46948782e+02 11 -1.81444394e+02 -7.23688905e+01 -8.52815565e+00 12 -9.59621915e+01 6.94762250e+01 -8.71971644e+00 13 5.81044632e+01 -1.90603130e+01 -3.25252389e+02 14 5.60594639e+01 5.06340318e+01 -4.69251147e+01 15 3.04335167e+02 6.13003395e+00 -3.96493894e+01 16 1.35084041e+02 3.44918323e+02 3.09304973e+01 17 -8.53153327e+01 -4.73510341e+01 3.72455429e+01 18 -8.35615059e+01 -5.03471789e+01 7.11555294e+01 19 -2.45715559e+01 -7.16119409e+01 5.45946309e+01 20 -5.10803038e+01 -1.54892123e+01 4.55241265e+01 21 -8.06726508e+01 -1.89185534e+02 1.37556461e+02 22 2.46956993e+02 1.07097881e+02 1.46437483e+02 23 4.68883483e+01 -3.09641211e+01 6.50256477e+01 24 2.05269481e+01 -5.31456399e+01 1.62576958e+02 25 -2.10118681e+02 1.79507670e+01 4.09255510e+01 26 -1.07860782e+02 2.85448459e+02 -1.02329326e+02 27 -6.91116648e+01 -1.59006600e+02 2.25739307e+02 28 -1.41099724e+02 1.01839519e+02 5.50830446e+01 29 4.32328923e+01 -2.95857248e+00 1.22040488e+02 30 9.55309697e+01 9.78054298e+01 4.35527937e+01 31 1.31742658e+02 8.76635572e+00 1.17106048e+02 32 1.78264052e+02 1.34444504e+02 2.34992784e+02 MONOATOMIC STRUCTURE (pbc=True)-- Species = Al (Configuration in file "config-T-Al.xyz") ----------------------------------------------------------------------------------------------------- Energy = 604.256481409 Forces: 1 1.35041052e+02 -1.27668978e+02 2.45912301e+01 2 -1.45171620e+02 2.46287980e+01 1.40889005e+02 3 5.42549026e+01 3.30508332e+01 5.37892210e+00 4 7.04668558e+01 8.99465818e+01 1.43197972e+02 5 6.23913749e+01 7.60349602e+00 -1.24299507e+01 6 -2.09901132e+02 1.38245621e+02 -1.14550996e+01 7 -2.40943480e+01 -9.50773681e+01 -2.08081765e+02 8 -4.02120650e+01 -7.63131174e+01 1.60648573e+01 9 -8.67579905e+01 -4.37783566e+01 3.04608371e+01 10 -6.66465292e+01 4.63755373e+01 -1.12063780e+02 11 -1.09887302e+02 -1.54576307e+02 6.01328033e+01 12 6.10174564e+01 -1.55485753e+01 1.05170499e+02 13 1.11798511e+01 -7.14492147e+01 -1.77755507e+02 14 -1.18616189e+02 -1.06576849e+01 -9.19864522e+01 15 1.42944172e+02 -7.73203069e+01 8.82851746e+00 16 1.00603237e+02 1.75805661e+02 8.85677337e+01 17 7.40827831e+01 -7.49017218e+01 3.50239533e+01 18 1.50083443e+01 5.46320790e+01 -5.89110921e+00 19 3.16203013e+01 7.85423720e+01 4.29458245e+01 20 7.01564851e+01 1.34304545e+02 -8.72922608e+01 21 -1.63516017e+02 -4.97852219e+00 9.91169793e+01 22 3.97670207e+00 2.53627398e+02 1.32184477e+02 23 -7.73096814e+01 -9.77600783e+01 -5.51858083e+01 24 1.45407983e+02 2.33105479e+01 -1.76580252e+02 25 -3.15394493e+01 -5.01998490e+01 1.96965757e+01 26 -3.43952442e+01 5.78545532e+01 -2.31678795e+02 27 1.02258709e+02 -2.41144511e+02 -1.80618493e+01 28 -1.99371629e+02 9.02478716e+01 -8.93050274e+00 29 -2.30149252e+01 -7.68185024e+01 6.88981423e+01 30 1.49952272e+01 -2.71073457e+00 6.33384357e+01 31 5.60251331e+01 -1.24274451e+01 3.62298360e+01 32 1.79003554e+02 2.51553784e+01 7.66765310e+01 MONOATOMIC STRUCTURE (pbc=False)-- Species = Co (Configuration in file "config-F-Co.xyz") ----------------------------------------------------------------------------------------------------- Energy = 76.7301356861 Forces: 1 -2.60172682e+01 -3.28112267e+01 -3.09523263e+01 2 2.20512607e+01 2.65644604e+01 -2.49234194e+01 3 1.29236207e+01 -2.56101550e+01 2.29918644e+01 4 -2.46828962e+01 2.54497229e+01 1.46854105e+01 5 3.19263884e+00 -1.01495972e+01 -1.14916550e+01 6 1.25793373e+01 1.02155441e+01 -2.29917224e+01 7 1.11134775e+01 -1.89982144e+01 9.66648322e+00 8 -6.94843586e+00 -8.62123715e+00 1.54243604e+01 9 -4.43602241e+00 2.56743564e+00 -7.94863688e+00 10 -3.77744457e+01 2.61592527e+01 -2.74474049e+01 11 2.04684034e+01 -4.43316087e+00 -2.46258718e+01 12 -1.08655731e+01 1.18457198e+01 -2.56654854e+00 13 8.25557740e+00 -5.13288406e+01 -4.35981713e+01 14 1.79377333e+01 1.19687033e+01 -1.48278118e+01 15 1.73375138e+01 -7.90676127e+00 -1.00560213e+01 16 1.05392811e+01 4.65610383e+01 5.12396545e+01 17 -8.06671672e+00 -1.27468456e+01 1.29163513e+01 18 1.58657135e+01 -1.36151609e+01 5.21899163e+00 19 -4.27665658e+00 -4.41661153e+00 4.47956830e+00 20 -1.47304813e+01 -1.20987116e+01 7.68785014e+00 21 -9.97848315e+00 -9.14922206e+00 -1.57815976e+01 22 1.55547783e+01 -7.29142659e+00 -4.72030267e+00 23 1.52008131e+01 -9.80618547e+00 1.54667915e+01 24 -1.19182337e+01 5.89010236e+00 1.50788201e+01 25 -4.95854267e+01 -1.16586825e+01 1.63149859e+01 26 2.23101622e+01 2.84263398e+01 -1.37585523e+01 27 1.54227024e+01 -6.07430599e+00 1.99162700e+01 28 -2.35613049e+01 2.01377539e+01 1.89863140e+01 29 -1.09475343e+01 -5.53191609e+00 -6.82071935e+00 30 7.63658843e+00 2.15864060e+01 6.32033021e+00 31 1.51875833e+01 4.52932535e+00 1.65855027e+01 32 2.12293414e-01 1.03464571e+01 9.53121294e+00 MONOATOMIC STRUCTURE (pbc=True)-- Species = Co (Configuration in file "config-T-Co.xyz") ----------------------------------------------------------------------------------------------------- Energy = 179.391386799 Forces: 1 -1.94430794e+01 -3.29574939e+01 -2.75405072e+01 2 2.29487148e+01 2.56693023e+01 -1.75820477e+01 3 1.13504335e+01 -2.12903162e+01 2.34140782e+01 4 -1.17075469e+01 2.56396467e+01 1.46557150e+01 5 1.90650206e+01 2.56401794e+01 2.16400114e+01 6 3.08808582e+00 7.64987910e+00 -1.32603930e+01 7 -2.26123370e+00 -1.18899747e+01 8.62588007e+00 8 -4.78859469e+00 -1.08035810e+01 1.39204780e+01 9 -1.01318846e+01 1.51210027e+01 2.67578997e+01 10 -4.60576722e+01 6.93996544e+00 -8.28912734e+00 11 2.07920036e+01 -3.36332808e+00 -2.54948446e+01 12 2.09427773e+01 2.87144922e+01 -1.69400406e+01 13 7.86034890e+00 -5.34688661e+01 -3.75358340e+01 14 2.67525218e+01 -3.72832425e-01 9.70595407e+00 15 -1.84913330e+01 -2.72919900e+01 -5.11279858e+00 16 1.11715685e+01 3.59278122e+01 5.54733966e+01 17 2.63836236e+00 -1.14332223e+01 1.27244971e+01 18 1.56486431e+01 -1.46396920e+01 8.15352990e+00 19 -2.29917791e+01 2.72245304e+01 -2.01906119e+01 20 -5.62800995e+00 -2.68270460e+01 -1.59105231e+01 21 -2.24846051e+01 1.28119908e+01 -1.94798063e+01 22 2.50444809e+00 -2.39978592e+00 -3.70667591e+00 23 2.81535444e+01 1.75434876e+01 2.14425195e+00 24 -1.61855362e+01 6.43490273e+00 7.86483436e+00 25 -3.65051402e+01 -1.02088766e+01 2.15084662e+01 26 2.30557249e+01 2.37970208e+01 -1.38682745e+01 27 2.56757000e+01 -7.04760348e+00 -2.36425213e+00 28 -3.23332177e+01 7.65529483e+00 1.32040272e+01 29 -8.88246702e+00 -3.72633811e+00 -5.06485279e+00 30 1.18820721e+01 -6.08716253e-01 7.21624892e+00 31 8.67867434e+00 1.18965864e+00 -3.07519317e-01 32 -4.31654433e+00 -2.96295027e+01 -1.43611595e+01 MONOATOMIC STRUCTURE (pbc=False)-- Species = Ni (Configuration in file "config-F-Ni.xyz") ----------------------------------------------------------------------------------------------------- Energy = 2.51547747778 Forces: 1 -1.14346460e+01 -1.42167916e+01 -5.90142222e+00 2 6.56434685e+00 -1.91415375e+00 -2.75872095e+01 3 4.01409241e+00 -1.89934279e+01 7.94170252e+00 4 -1.54339265e+01 8.47752279e+00 6.49874360e+00 5 -7.78593513e+00 -1.38024737e+01 -1.31132459e+01 6 1.63813571e+01 4.47011634e+00 -1.68598859e+01 7 1.79051889e+01 -1.15225287e+01 8.36078758e+00 8 -2.82371555e+00 5.17343125e+00 1.37209525e+01 9 -1.79169356e+01 8.78167742e-01 -9.17626022e+00 10 3.80762525e+00 1.63525230e+01 -1.06330691e+01 11 -1.92238075e-01 -2.32043648e+00 6.54085140e+00 12 -4.45483844e+00 6.14575086e+00 3.99933849e+00 13 2.63182874e+00 3.19297314e+00 -1.82678568e+01 14 5.29260563e+00 6.26604798e+00 -9.65974659e+00 15 1.91299682e+01 -6.55534731e+00 -5.75551228e+00 16 -4.96023897e+00 1.93700964e+01 -4.03214186e+00 17 -1.16402220e+01 -1.98393208e+01 2.01676034e+00 18 1.02722339e+01 -1.20154978e+00 -8.25364469e+00 19 -7.24806629e+00 -1.61028224e+01 1.22461697e+01 20 -1.33506026e+01 -1.42818976e+00 2.09698533e+01 21 -6.69245722e+00 -1.22810589e+01 -1.48423522e+01 22 4.27988504e+00 -4.41111852e+00 -8.62154879e+00 23 2.01475136e+01 -1.37372845e+01 1.33075872e+01 24 -8.00785532e+00 1.16491005e+01 1.08428162e+01 25 -1.76517771e+01 3.33675606e+00 -1.56461481e+01 26 -4.67568996e+00 1.81757574e+01 -9.02406343e+00 27 9.71272928e+00 -8.34616626e+00 1.86640614e+01 28 -1.11923827e+01 1.83806499e+01 1.18112137e+01 29 -4.40353241e+00 -9.42429413e+00 5.08117879e-01 30 1.30120022e+01 1.93929064e+01 4.95451399e+00 31 6.65384168e+00 3.77627072e+00 1.64263838e+01 32 1.00598409e+01 1.10588938e+01 1.85642540e+01 MONOATOMIC STRUCTURE (pbc=True)-- Species = Ni (Configuration in file "config-T-Ni.xyz") ----------------------------------------------------------------------------------------------------- Energy = 104.237674151 Forces: 1 1.31876154e-01 -5.42828413e+00 -2.80733397e+00 2 4.33560278e-01 -1.10646172e+00 -7.69507168e+00 3 2.15234346e+00 -8.72382042e+00 6.69570343e+00 4 -4.92001589e+00 8.38543592e-01 1.43226259e+00 5 -7.51408420e+00 -6.84292519e+00 1.03049073e+01 6 -3.19598316e+00 1.01871817e+01 5.52297623e+00 7 3.37367697e+00 6.98784855e+00 3.64890620e+00 8 7.26568695e+00 -8.13631118e-02 4.73064510e+00 9 -3.45149574e+00 1.18828466e-01 1.29238000e+01 10 -5.96767544e+00 7.06215156e+00 3.85172753e+00 11 -4.83643793e+00 8.80270418e-02 3.73024657e-01 12 1.45116781e+01 -7.27556516e+00 3.40781366e+00 13 6.70473626e+00 4.00993013e+00 -6.70004937e+00 14 -4.50515863e+00 -6.05289989e+00 -1.23966664e+01 15 6.45287755e+00 -9.05128472e+00 -1.12015980e+01 16 2.88057390e+00 4.66305199e+00 9.87273596e-01 17 6.36277693e+00 -5.90030993e+00 3.20248945e+00 18 6.06158241e+00 -4.11499573e-01 -4.05291415e+00 19 -1.05788942e+01 -9.18792862e+00 5.23903745e+00 20 -1.63686697e+00 5.56298854e+00 5.54838300e+00 21 6.99181927e+00 4.92035586e+00 -3.68679981e+00 22 -1.16714914e+01 -4.56654952e+00 -1.42641575e+01 23 -1.62656162e+00 -1.91092679e+01 -6.99171780e+00 24 -1.26179668e+01 6.64011788e+00 -6.20007852e+00 25 4.17949643e+00 1.05273771e+01 -3.26001145e+00 26 -1.30621796e+01 4.34268528e+00 -6.06591954e+00 27 4.71234554e+00 -9.73050036e+00 -7.40417843e+00 28 4.75104621e-01 1.82940572e+01 3.28504027e+00 29 3.84215763e+00 -2.33417260e+00 1.87249446e+00 30 5.43704182e-01 3.49338626e+00 4.07369058e+00 31 -1.12615488e+01 8.60892233e+00 6.98628556e-01 32 1.97703638e+01 -5.42620684e-01 1.49276926e+01 MIXED STRUCTURE (pbc=False)-- Species = Al Co Ni (Configuration in file "config-F-AlCoNi.xyz") ----------------------------------------------------------------------------------------------------- Energy = 0.0413979799179 Forces: 1 -2.04941956e+01 -1.59516195e+01 -8.04004531e+00 2 1.60839722e+01 2.46418964e+01 -9.37903010e+00 3 2.05971957e+01 -1.26930916e+01 1.08407041e+01 4 -2.14085980e+01 7.30179131e+00 -5.12372374e+00 5 1.23449325e+00 -9.65175452e+00 -1.13773244e+01 6 8.82831756e+00 1.51026794e+00 -1.32456643e+01 7 3.10008835e+01 -2.89220495e+01 -2.41109715e+01 8 -5.80305140e+00 4.40967250e+01 -3.81258832e+01 9 -9.22692711e+00 -2.81078370e+01 -1.77968931e+01 10 1.13107244e+01 8.49870730e+00 -1.90974120e+01 11 7.89709084e+00 -5.50706154e+00 -4.49321642e+00 12 -1.65246039e+01 2.75844292e+01 2.08701270e+01 13 8.36194743e-02 2.18957173e+00 -3.83663387e+00 14 6.95128259e+00 2.49216681e+00 -1.04831023e+01 15 1.48076719e+01 -8.63567472e+00 -7.01984026e+00 16 -6.93336849e+00 1.21756591e+01 4.16245178e+00 17 -1.66814249e+01 -9.63527996e+00 -9.93136193e+00 18 -2.34975918e+01 2.89938571e+01 1.07011303e+01 19 4.93698950e+00 -3.40568067e+00 2.10765714e+01 20 -6.20921965e+00 8.88926744e+00 7.19741672e+00 21 -2.03051510e+01 -7.56171134e+01 4.20525652e+01 22 2.16644838e+01 2.61687921e+01 4.18084360e+00 23 1.38200963e+01 -8.46881624e+00 2.18881884e+01 24 -5.04226385e+00 -1.78112896e+01 -4.58433555e-01 25 -1.28028377e+01 8.34918249e+00 8.45738746e+00 26 -1.02864073e+01 1.06400515e+01 -1.21735387e+01 27 -1.39920511e+01 -6.00962666e+00 1.05844936e+01 28 -7.01159492e+00 1.55385055e+00 2.25302228e+00 29 -4.75408768e+00 -1.11967309e+01 2.49146719e+00 30 7.34323992e+00 9.82210313e+00 4.33071931e+00 31 1.85322147e+01 4.15862631e+00 1.10616746e+01 32 1.58810989e+01 1.25466804e+01 1.25443118e+01 MIXED STRUCTURE (pbc=True)-- Species = Al Co Ni (Configuration in file "config-T-AlCoNi.xyz") ----------------------------------------------------------------------------------------------------- Energy = 35.2671858862 Forces: 1 -1.51811197e+01 -4.12095626e+00 -1.05423906e+01 2 8.11053977e+00 1.93543819e+01 -3.55041126e+00 3 1.87640795e+01 3.31335339e+00 7.05015411e+00 4 -8.48671203e+00 8.05861966e+00 -9.85567258e+00 5 9.91773208e+00 1.10727818e+00 2.33537039e-01 6 6.65584344e+00 3.28427716e+00 -7.55301876e+00 7 3.13934138e+01 -2.53724509e+01 -2.24445876e+01 8 -5.73253643e+00 3.76467671e+01 -3.53296145e+01 9 3.71825447e-01 -2.45010132e+01 -1.77616362e+01 10 -5.66832467e+00 -3.01092312e+00 -8.10572373e+00 11 6.83690221e+00 -6.41641488e+00 -6.50400467e+00 12 -1.07891647e+01 1.45158809e+01 1.46966072e+01 13 6.49189535e+00 -5.94046884e+00 8.01012645e+00 14 1.67033134e+00 -3.40506992e-01 -5.02685711e+00 15 -4.77903931e+00 -1.04013206e+01 -5.09117380e+00 16 -4.70845093e+00 8.60710376e+00 7.29057269e-01 17 -3.55003608e+00 6.72558334e+00 -1.54071353e+01 18 -2.08377140e+01 2.36253965e+01 1.03162096e+01 19 -1.81265915e+00 2.72092177e+00 1.65202310e+01 20 3.40854255e+00 9.18345381e+00 1.06180752e+01 21 -2.35780584e+01 -4.49051116e+01 2.15630137e+01 22 3.66708649e+00 1.99128311e+01 4.10809245e+00 23 5.64906376e+00 -5.08730630e+00 2.51430683e+01 24 -3.60137437e+00 -1.38608368e+01 -2.66579996e+00 25 -3.97070842e+00 9.56594088e+00 1.31731848e+01 26 1.41086352e+00 -1.00391122e+00 -5.96065775e+00 27 -1.78569473e+01 -6.61110673e+00 -3.79937806e-01 28 1.23679652e+00 -1.25116382e+01 9.15591462e+00 29 3.56719940e-02 -7.31481541e+00 7.88852633e+00 30 -4.17774532e+00 1.31960849e+00 -6.84821949e-01 31 1.39691628e+01 7.51713164e-01 4.16176429e+00 32 1.51408402e+01 1.70566990e+00 3.49588136e+00 ================================================================================ VALGRIND OUTPUT ================================================================================ ==11664== Memcheck, a memory error detector ==11664== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==11664== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info ==11664== Command: python runner2.py EAM_IMD_BrommerGaehler_2006B_AlNiCo__MO_128037485276_003 ==11664== ==11664== Syscall param sched_getaffinity(mask) points to unaddressable byte(s) ==11664== at 0x4F3FF2F: sched_getaffinity@@GLIBC_2.3.4 (sched_getaffinity.c:36) ==11664== by 0x705438B: get_num_procs (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==11664== by 0x705447C: blas_get_cpu_number (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==11664== by 0x6E2C077: gotoblas_init (in /usr/local/lib/python2.7/dist-packages/numpy/.libs/libopenblasp-r0-8dca6697.3.0.dev.so) ==11664== by 0x4010732: call_init (dl-init.c:72) ==11664== by 0x4010732: _dl_init (dl-init.c:119) ==11664== by 0x40151FE: dl_open_worker (dl-open.c:522) ==11664== by 0x4FA32DE: _dl_catch_exception (dl-error-skeleton.c:196) ==11664== by 0x40147C9: _dl_open (dl-open.c:605) ==11664== by 0x544CF95: dlopen_doit (dlopen.c:66) ==11664== by 0x4FA32DE: _dl_catch_exception (dl-error-skeleton.c:196) ==11664== by 0x4FA336E: _dl_catch_error (dl-error-skeleton.c:215) ==11664== by 0x544D734: _dlerror_run (dlerror.c:162) ==11664== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==11664== ==11664== ==11664== HEAP SUMMARY: ==11664== in use at exit: 17,814,463 bytes in 4,342 blocks ==11664== total heap usage: 245,288 allocs, 240,946 frees, 97,107,537 bytes allocated ==11664== ==11664== LEAK SUMMARY: ==11664== definitely lost: 0 bytes in 0 blocks ==11664== indirectly lost: 0 bytes in 0 blocks ==11664== possibly lost: 182,735 bytes in 112 blocks ==11664== still reachable: 17,631,728 bytes in 4,230 blocks ==11664== suppressed: 0 bytes in 0 blocks ==11664== Rerun with --leak-check=full to see details of leaked memory ==11664== ==11664== For counts of detected and suppressed errors, rerun with: -v ==11664== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 2547 from 175) ================================================================================ 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.