Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001784/0.001784, allocations: 102.1 kB / 19.7 MB, free: 2.254 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.002036/0.002036, allocations: 219.5 kB / 23.01 MB, free: 4.609 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 1.461/1.461, allocations: 230.6 MB / 256.8 MB, free: 8.047 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 3.214/3.214, allocations: 0.505 GB / 0.8108 GB, free: 22.08 MB / 0.6231 GB " [Timeout remaining time 176] Using package Buildings with version 13.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,tolerance=1e-06,outputFormat="mat",numberOfIntervals=86400,variableFilter="time|mean.y|reference.y.1.|assEqu.diff|assEqu.threShold|assEqu.satisfied",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,tolerance=1e-06,outputFormat="mat",numberOfIntervals=86400,variableFilter="time|mean.y|reference.y.1.|assEqu.diff|assEqu.threShold|assEqu.satisfied",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7") [Timeout 300] "Notification: Buildings requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002032/0.002032, allocations: 67 kB / 1.178 GB, free: 16.88 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3532/0.3553, allocations: 180.2 MB / 1.354 GB, free: 7.945 MB / 1.045 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7): time 0.1913/0.5466, allocations: 161.7 MB / 1.512 GB, free: 5.645 MB / 1.201 GB Notification: Performance of NFInst.instExpressions: time 0.02965/0.5762, allocations: 22.31 MB / 1.534 GB, free: 15.27 MB / 1.233 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002278/0.5785, allocations: 83.31 kB / 1.534 GB, free: 15.18 MB / 1.233 GB Notification: Performance of NFTyping.typeComponents: time 0.002074/0.5806, allocations: 1.391 MB / 1.535 GB, free: 13.79 MB / 1.233 GB Notification: Performance of NFTyping.typeBindings: time 0.002149/0.5827, allocations: 1.09 MB / 1.536 GB, free: 12.7 MB / 1.233 GB Notification: Performance of NFTyping.typeClassSections: time 0.001526/0.5843, allocations: 0.5867 MB / 1.537 GB, free: 12.11 MB / 1.233 GB Notification: Performance of NFFlatten.flatten: time 0.002241/0.5865, allocations: 1.731 MB / 1.539 GB, free: 10.37 MB / 1.233 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001158/0.5877, allocations: 0.776 MB / 1.539 GB, free: 9.57 MB / 1.233 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001073/0.5887, allocations: 0.767 MB / 1.54 GB, free: 8.801 MB / 1.233 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001558/0.5903, allocations: 1.304 MB / 1.541 GB, free: 7.496 MB / 1.233 GB Notification: Performance of NFPackage.collectConstants: time 0.0001518/0.5905, allocations: 92 kB / 1.541 GB, free: 7.406 MB / 1.233 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003349/0.5908, allocations: 144 kB / 1.542 GB, free: 7.266 MB / 1.233 GB Notification: Performance of NFScalarize.scalarize: time 0.0003724/0.5912, allocations: 435.9 kB / 1.542 GB, free: 6.836 MB / 1.233 GB Notification: Performance of NFVerifyModel.verify: time 0.0006212/0.5918, allocations: 0.6559 MB / 1.543 GB, free: 6.176 MB / 1.233 GB Notification: Performance of NFConvertDAE.convert: time 0.001922/0.5937, allocations: 1.633 MB / 1.544 GB, free: 4.535 MB / 1.233 GB Notification: Performance of FrontEnd - DAE generated: time 5.15e-06/0.5937, allocations: 0 / 1.544 GB, free: 4.535 MB / 1.233 GB Notification: Performance of FrontEnd: time 1.903e-06/0.5937, allocations: 0 / 1.544 GB, free: 4.535 MB / 1.233 GB Notification: Performance of Transformations before backend: time 2.034e-05/0.5937, allocations: 0 / 1.544 GB, free: 4.535 MB / 1.233 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 157 * Number of variables: 157 Notification: Performance of Generate backend data structure: time 0.003214/0.5969, allocations: 1.976 MB / 1.546 GB, free: 2.516 MB / 1.233 GB Notification: Performance of prepare preOptimizeDAE: time 4.103e-05/0.597, allocations: 12.03 kB / 1.546 GB, free: 2.504 MB / 1.233 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003111/0.5973, allocations: 195.7 kB / 1.546 GB, free: 2.312 MB / 1.233 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001359/0.5987, allocations: 0.836 MB / 1.547 GB, free: 1.445 MB / 1.233 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001618/0.5988, allocations: 112.7 kB / 1.547 GB, free: 1.324 MB / 1.233 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001098/0.5989, allocations: 71.98 kB / 1.547 GB, free: 1.254 MB / 1.233 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001319/0.6002, allocations: 0.7137 MB / 1.548 GB, free: 0.5117 MB / 1.233 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.143e-05/0.6003, allocations: 7.984 kB / 1.548 GB, free: 0.5039 MB / 1.233 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.072e-05/0.6003, allocations: 24 kB / 1.548 GB, free: 492 kB / 1.233 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.185e-05/0.6004, allocations: 19.98 kB / 1.548 GB, free: 472 kB / 1.233 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001153/0.6015, allocations: 0.5438 MB / 1.549 GB, free: 15.91 MB / 1.248 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004932/0.6064, allocations: 3.575 MB / 1.552 GB, free: 12.07 MB / 1.248 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001343/0.6078, allocations: 0.5688 MB / 1.553 GB, free: 11.48 MB / 1.248 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007389/0.6085, allocations: 345.9 kB / 1.553 GB, free: 11.14 MB / 1.248 GB Notification: Performance of preOpt evalFunc (simulation): time 5.285e-05/0.6086, allocations: 8.5 kB / 1.553 GB, free: 11.13 MB / 1.248 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007567/0.6093, allocations: 384.1 kB / 1.553 GB, free: 10.75 MB / 1.248 GB Notification: Performance of pre-optimization done (n=65): time 2.455e-06/0.6093, allocations: 4 kB / 1.553 GB, free: 10.74 MB / 1.248 GB Notification: Performance of matching and sorting (n=65): time 0.005063/0.6144, allocations: 1.665 MB / 1.555 GB, free: 9.062 MB / 1.248 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.394e-05/0.6145, allocations: 60.06 kB / 1.555 GB, free: 8.992 MB / 1.248 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002664/0.6171, allocations: 2.288 MB / 1.557 GB, free: 6.699 MB / 1.248 GB Notification: Performance of collectPreVariables (initialization): time 7.126e-05/0.6172, allocations: 41.7 kB / 1.557 GB, free: 6.652 MB / 1.248 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006724/0.6179, allocations: 0.7233 MB / 1.558 GB, free: 5.926 MB / 1.248 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002119/0.6181, allocations: 226.2 kB / 1.558 GB, free: 5.703 MB / 1.248 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001969/0.6183, allocations: 130.6 kB / 1.558 GB, free: 5.566 MB / 1.248 GB Notification: Performance of setup shared object (initialization): time 0.0001593/0.6184, allocations: 334 kB / 1.559 GB, free: 5.234 MB / 1.248 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006185/0.619, allocations: 281.8 kB / 1.559 GB, free: 4.961 MB / 1.248 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007116/0.6198, allocations: 420.7 kB / 1.559 GB, free: 4.5 MB / 1.248 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001218/0.621, allocations: 0.6685 MB / 1.56 GB, free: 3.781 MB / 1.248 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.639e-06/0.621, allocations: 7.938 kB / 1.56 GB, free: 3.773 MB / 1.248 GB Notification: Performance of matching and sorting (n=93) (initialization): time 0.002359/0.6233, allocations: 1.106 MB / 1.561 GB, free: 2.656 MB / 1.248 GB Notification: Performance of prepare postOptimizeDAE: time 1.927e-05/0.6234, allocations: 8 kB / 1.561 GB, free: 2.648 MB / 1.248 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.084e-05/0.6234, allocations: 4.219 kB / 1.561 GB, free: 2.645 MB / 1.248 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0008174/0.6242, allocations: 277.8 kB / 1.561 GB, free: 2.371 MB / 1.248 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004391/0.6246, allocations: 127.7 kB / 1.561 GB, free: 2.246 MB / 1.248 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005713/0.6303, allocations: 3.596 MB / 1.565 GB, free: 14.54 MB / 1.264 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006839/0.631, allocations: 95.47 kB / 1.565 GB, free: 14.45 MB / 1.264 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.718e-05/0.6311, allocations: 31.98 kB / 1.565 GB, free: 14.41 MB / 1.264 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 17 * Number of states: 0 () * Number of discrete variables: 25 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition6,$PRE.intGai.nextTimeEvent,$whenCondition5,$PRE.reference.nextTimeEvent,$whenCondition4,$PRE.setTemp.nextTimeEvent,$whenCondition3,$whenCondition1,reference.nextTimeEvent,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,assEqu.satisfied,$PRE.assEqu.satisfied,mean.y_last,$PRE.mean.y_last,$whenCondition2,intGai.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,setTemp.nextTimeEvent,setTemp.nextTimeEventScaled,$PRE.setTemp.nextTimeEventScaled,conHeaCoo.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (67): * Single equations (assignments): 66 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,25)} Notification: Performance of prepare postOptimizeDAE: time 0.0007642/0.6318, allocations: 464.1 kB / 1.566 GB, free: 13.95 MB / 1.264 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002183/0.6321, allocations: 166.9 kB / 1.566 GB, free: 13.79 MB / 1.264 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002235/0.6343, allocations: 1.011 MB / 1.567 GB, free: 12.75 MB / 1.264 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.14e-05/0.6343, allocations: 19.88 kB / 1.567 GB, free: 12.73 MB / 1.264 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.189e-06/0.6343, allocations: 3.984 kB / 1.567 GB, free: 12.73 MB / 1.264 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.344e-06/0.6343, allocations: 0 / 1.567 GB, free: 12.73 MB / 1.264 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003589/0.6379, allocations: 2.016 MB / 1.569 GB, free: 10.66 MB / 1.264 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.586e-06/0.6379, allocations: 0 / 1.569 GB, free: 10.66 MB / 1.264 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002814/0.6382, allocations: 67.89 kB / 1.569 GB, free: 10.59 MB / 1.264 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.000772/0.639, allocations: 274.8 kB / 1.569 GB, free: 10.32 MB / 1.264 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.687e-05/0.639, allocations: 15.98 kB / 1.569 GB, free: 10.3 MB / 1.264 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.006583/0.6456, allocations: 5.05 MB / 1.574 GB, free: 5.035 MB / 1.264 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.873e-06/0.6456, allocations: 0 / 1.574 GB, free: 5.035 MB / 1.264 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003022/0.6486, allocations: 1.41 MB / 1.575 GB, free: 3.602 MB / 1.264 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005958/0.6492, allocations: 202.7 kB / 1.576 GB, free: 3.402 MB / 1.264 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001273/0.6493, allocations: 12 kB / 1.576 GB, free: 3.391 MB / 1.264 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003988/0.6497, allocations: 39.95 kB / 1.576 GB, free: 3.352 MB / 1.264 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002258/0.65, allocations: 68.53 kB / 1.576 GB, free: 3.281 MB / 1.264 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.275e-05/0.65, allocations: 23.92 kB / 1.576 GB, free: 3.258 MB / 1.264 GB Notification: Performance of sorting global known variables: time 0.002121/0.6521, allocations: 1.66 MB / 1.577 GB, free: 1.605 MB / 1.264 GB Notification: Performance of sort global known variables: time 1.1e-07/0.6521, allocations: 0 / 1.577 GB, free: 1.605 MB / 1.264 GB Notification: Performance of remove unused functions: time 0.001042/0.6532, allocations: 275.6 kB / 1.578 GB, free: 1.336 MB / 1.264 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 5 (mean.x,assEqu.diff,conHeaCoo.I.y,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,thermalZoneTwoElements.extWallRC.thermCapExt[1].T) * Number of discrete variables: 15 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,mean.y_last,assEqu.nFai,assEqu.satisfied,setTemp.nextTimeEventScaled,setTemp.nextTimeEvent,reference.nextTimeEventScaled,reference.nextTimeEvent,intGai.nextTimeEventScaled,intGai.nextTimeEvent) * Number of discrete states: 9 (intGai.nextTimeEvent,reference.nextTimeEvent,setTemp.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,setTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (39): * Single equations (assignments): 29 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 8 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,22)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001923/0.6551, allocations: 486.8 kB / 1.578 GB, free: 1.043 MB / 1.264 GB Notification: Performance of simCode: created initialization part: time 0.002243/0.6574, allocations: 0.8808 MB / 1.579 GB, free: 156 kB / 1.264 GB Notification: Performance of simCode: created event and clocks part: time 5.3e-06/0.6574, allocations: 0 / 1.579 GB, free: 156 kB / 1.264 GB Notification: Performance of simCode: created simulation system equations: time 0.001299/0.6587, allocations: 0.649 MB / 1.58 GB, free: 15.47 MB / 1.279 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001329/0.66, allocations: 292 kB / 1.58 GB, free: 15.2 MB / 1.279 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005808/0.6658, allocations: 3.225 MB / 1.583 GB, free: 11.93 MB / 1.279 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001252/0.667, allocations: 1.314 MB / 1.584 GB, free: 10.59 MB / 1.279 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002345/0.6673, allocations: 71.36 kB / 1.584 GB, free: 10.52 MB / 1.279 GB Notification: Performance of SimCode: time 1.193e-06/0.6673, allocations: 0 / 1.584 GB, free: 10.52 MB / 1.279 GB Notification: Performance of Templates: time 0.037/0.7043, allocations: 24.04 MB / 1.608 GB, free: 2.52 MB / 1.295 GB " [Timeout remaining time 299] make -j1 -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.makefile [Timeout 300] (rm -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; mkfifo Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; head -c 1048576 < Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe >> ../files/Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.sim & ./Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7 -abortSlowSimulation -alarm=800 -emit_protected -lv LOG_STATS > Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe 2>&1) [Timeout 800] diffSimulationResults("Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase7.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "" [Timeout remaining time 300] "" Variables in the reference:time,mean.y,reference.y[1],assEqu.diff,assEqu.threShold,assEqu.satisfied Variables in the result:assEqu.diff,assEqu.satisfied,assEqu.threShold,mean.y,reference.y[1],time [Calling sys.exit(0), Time elapsed: 15.502172986016376]