Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.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 0.00114/0.00114, allocations: 91.67 kB / 20.94 MB, free: 3.305 MB / 18.57 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 0.003452/0.003452, allocations: 163.4 kB / 24.38 MB, free: 8.598 MB / 18.57 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 0.8907/0.8907, allocations: 177.1 MB / 204.8 MB, free: 4.969 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.x/package.mo): time 1.824/1.824, allocations: 389.6 MB / 0.6356 GB, free: 12.19 MB / 0.6042 GB " [Timeout remaining time 178] Using package Buildings with version 13.0.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 13.0.2-maint.13.x/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.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction") translateModel(Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction") [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 1.553e-06/1.553e-06, allocations: 0 / 0.7755 GB, free: 5.141 MB / 0.7292 GB Notification: Performance of FrontEnd - Absyn->SCode: time 2.165e-05/2.32e-05, allocations: 4.562 kB / 0.7755 GB, free: 5.137 MB / 0.7292 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction): time 0.1256/0.1256, allocations: 147.8 MB / 0.9198 GB, free: 1.02 MB / 0.8698 GB Notification: Performance of NFInst.instExpressions: time 0.003997/0.1296, allocations: 3.483 MB / 0.9232 GB, free: 13.53 MB / 0.8855 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0003171/0.1299, allocations: 31.75 kB / 0.9233 GB, free: 13.5 MB / 0.8855 GB Notification: Performance of NFTyping.typeComponents: time 0.0004595/0.1304, allocations: 182.6 kB / 0.9234 GB, free: 13.32 MB / 0.8855 GB Notification: Performance of NFTyping.typeBindings: time 0.001289/0.1317, allocations: 0.9323 MB / 0.9244 GB, free: 12.38 MB / 0.8855 GB Notification: Performance of NFTyping.typeClassSections: time 0.001075/0.1327, allocations: 0.6157 MB / 0.925 GB, free: 11.77 MB / 0.8855 GB Notification: Performance of NFFlatten.flatten: time 0.001307/0.134, allocations: 1.718 MB / 0.9266 GB, free: 10.04 MB / 0.8855 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0007197/0.1348, allocations: 490.2 kB / 0.9271 GB, free: 9.57 MB / 0.8855 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001075/0.1358, allocations: 0.9326 MB / 0.928 GB, free: 8.652 MB / 0.8855 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0005256/0.1364, allocations: 498.6 kB / 0.9285 GB, free: 8.164 MB / 0.8855 GB Notification: Performance of NFPackage.collectConstants: time 0.0001096/0.1365, allocations: 71.94 kB / 0.9286 GB, free: 8.094 MB / 0.8855 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0006612/0.1371, allocations: 359 kB / 0.9289 GB, free: 7.742 MB / 0.8855 GB Notification: Performance of NFScalarize.scalarize: time 0.0002212/0.1373, allocations: 295.2 kB / 0.9292 GB, free: 7.453 MB / 0.8855 GB Notification: Performance of NFVerifyModel.verify: time 0.0003105/0.1377, allocations: 287.4 kB / 0.9295 GB, free: 7.172 MB / 0.8855 GB Notification: Performance of NFConvertDAE.convert: time 0.001023/0.1387, allocations: 0.7944 MB / 0.9302 GB, free: 6.375 MB / 0.8855 GB Notification: Performance of FrontEnd - DAE generated: time 4.047e-06/0.1387, allocations: 3.984 kB / 0.9302 GB, free: 6.371 MB / 0.8855 GB Notification: Performance of FrontEnd: time 1.182e-06/0.1387, allocations: 0 / 0.9302 GB, free: 6.371 MB / 0.8855 GB Notification: Performance of Transformations before backend: time 8.997e-06/0.1387, allocations: 0 / 0.9302 GB, free: 6.371 MB / 0.8855 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 136 * Number of variables: 136 Notification: Performance of Generate backend data structure: time 0.001235/0.1399, allocations: 0.8965 MB / 0.9311 GB, free: 5.449 MB / 0.8855 GB Notification: Performance of prepare preOptimizeDAE: time 2.776e-05/0.14, allocations: 13.34 kB / 0.9311 GB, free: 5.438 MB / 0.8855 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0005949/0.1406, allocations: 220.4 kB / 0.9313 GB, free: 5.223 MB / 0.8855 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004689/0.141, allocations: 402.3 kB / 0.9317 GB, free: 4.805 MB / 0.8855 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.688e-05/0.141, allocations: 45.42 kB / 0.9318 GB, free: 4.762 MB / 0.8855 GB Notification: Performance of preOpt expandDerOperator (simulation): time 5.91e-05/0.1411, allocations: 63.98 kB / 0.9318 GB, free: 4.699 MB / 0.8855 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005767/0.1417, allocations: 0.7684 MB / 0.9326 GB, free: 3.824 MB / 0.8855 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.193e-05/0.1417, allocations: 3.938 kB / 0.9326 GB, free: 3.82 MB / 0.8855 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.448e-05/0.1417, allocations: 24 kB / 0.9326 GB, free: 3.797 MB / 0.8855 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.09e-05/0.1418, allocations: 29.3 kB / 0.9326 GB, free: 3.766 MB / 0.8855 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0002169/0.142, allocations: 175.9 kB / 0.9328 GB, free: 3.594 MB / 0.8855 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 0.001366/0.1433, allocations: 1.236 MB / 0.934 GB, free: 2.316 MB / 0.8855 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0001976/0.1435, allocations: 173.9 kB / 0.9342 GB, free: 2.137 MB / 0.8855 GB Notification: Performance of preOpt resolveLoops (simulation): time 4.883e-05/0.1436, allocations: 44.83 kB / 0.9342 GB, free: 2.09 MB / 0.8855 GB Notification: Performance of preOpt evalFunc (simulation): time 1.929e-05/0.1436, allocations: 12 kB / 0.9342 GB, free: 2.078 MB / 0.8855 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.154e-05/0.1436, allocations: 34.56 kB / 0.9343 GB, free: 2.035 MB / 0.8855 GB Notification: Performance of pre-optimization done (n=20): time 1.282e-06/0.1436, allocations: 4 kB / 0.9343 GB, free: 2.031 MB / 0.8855 GB Notification: Performance of matching and sorting (n=20): time 0.0005711/0.1442, allocations: 269.1 kB / 0.9345 GB, free: 1.754 MB / 0.8855 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.921e-05/0.1442, allocations: 81.06 kB / 0.9346 GB, free: 1.656 MB / 0.8855 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002056/0.1444, allocations: 367.1 kB / 0.9349 GB, free: 1.285 MB / 0.8855 GB Notification: Performance of collectPreVariables (initialization): time 2.101e-05/0.1445, allocations: 29.7 kB / 0.935 GB, free: 1.25 MB / 0.8855 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001125/0.1446, allocations: 316.7 kB / 0.9353 GB, free: 0.9375 MB / 0.8855 GB Notification: Performance of collectInitialBindings (initialization): time 3.989e-05/0.1446, allocations: 79.31 kB / 0.9353 GB, free: 0.8594 MB / 0.8855 GB Notification: Performance of simplifyInitialFunctions (initialization): time 6.993e-05/0.1447, allocations: 65.95 kB / 0.9354 GB, free: 0.7891 MB / 0.8855 GB Notification: Performance of setup shared object (initialization): time 8.003e-05/0.1448, allocations: 350.7 kB / 0.9357 GB, free: 448 kB / 0.8855 GB Notification: Performance of preBalanceInitialSystem (initialization): time 4.686e-05/0.1448, allocations: 35.47 kB / 0.9358 GB, free: 412 kB / 0.8855 GB Notification: Performance of partitionIndependentBlocks (initialization): time 8.995e-05/0.1449, allocations: 144.3 kB / 0.9359 GB, free: 228 kB / 0.8855 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001401/0.145, allocations: 179.4 kB / 0.9361 GB, free: 16 kB / 0.8855 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.815e-06/0.145, allocations: 3.938 kB / 0.9361 GB, free: 12 kB / 0.8855 GB Notification: Performance of matching and sorting (n=40) (initialization): time 0.0002819/0.1453, allocations: 243.9 kB / 0.9363 GB, free: 15.75 MB / 0.9011 GB Notification: Performance of prepare postOptimizeDAE: time 1.195e-05/0.1453, allocations: 8 kB / 0.9363 GB, free: 15.75 MB / 0.9011 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.35e-06/0.1453, allocations: 3.984 kB / 0.9363 GB, free: 15.74 MB / 0.9011 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0001459/0.1455, allocations: 66.16 kB / 0.9364 GB, free: 15.67 MB / 0.9011 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001808/0.1457, allocations: 79.89 kB / 0.9365 GB, free: 15.59 MB / 0.9011 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001495/0.1472, allocations: 2.531 MB / 0.9389 GB, free: 12.86 MB / 0.9011 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001848/0.1473, allocations: 31.73 kB / 0.939 GB, free: 12.83 MB / 0.9011 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.551e-05/0.1474, allocations: 12 kB / 0.939 GB, free: 12.82 MB / 0.9011 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (34): * Single equations (assignments): 32 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,5), (1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.0001033/0.1475, allocations: 128.6 kB / 0.9391 GB, free: 12.68 MB / 0.9011 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 5.396e-05/0.1475, allocations: 43.72 kB / 0.9392 GB, free: 12.64 MB / 0.9011 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 4.23e-05/0.1476, allocations: 47.67 kB / 0.9392 GB, free: 12.6 MB / 0.9011 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.544e-06/0.1476, allocations: 4 kB / 0.9392 GB, free: 12.6 MB / 0.9011 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.763e-06/0.1476, allocations: 0 / 0.9392 GB, free: 12.6 MB / 0.9011 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0002423/0.1478, allocations: 372 kB / 0.9396 GB, free: 12.16 MB / 0.9011 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0004248/0.1482, allocations: 0.5019 MB / 0.94 GB, free: 11.63 MB / 0.9011 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.854e-06/0.1482, allocations: 0 / 0.94 GB, free: 11.63 MB / 0.9011 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001413/0.1484, allocations: 50.8 kB / 0.9401 GB, free: 11.58 MB / 0.9011 GB Notification: Performance of postOpt tearingSystem (simulation): time 9.264e-05/0.1485, allocations: 47.91 kB / 0.9401 GB, free: 11.53 MB / 0.9011 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 9.398e-06/0.1485, allocations: 4 kB / 0.9401 GB, free: 11.52 MB / 0.9011 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000711/0.1492, allocations: 1.331 MB / 0.9414 GB, free: 10.09 MB / 0.9011 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.733e-06/0.1492, allocations: 4 kB / 0.9414 GB, free: 10.09 MB / 0.9011 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0001923/0.1494, allocations: 307.8 kB / 0.9417 GB, free: 9.758 MB / 0.9011 GB Notification: Performance of postOpt removeConstants (simulation): time 9.306e-05/0.1495, allocations: 55.69 kB / 0.9418 GB, free: 9.703 MB / 0.9011 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.961e-05/0.1495, allocations: 4 kB / 0.9418 GB, free: 9.699 MB / 0.9011 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001659/0.1497, allocations: 22.17 kB / 0.9418 GB, free: 9.68 MB / 0.9011 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 4.219e-05/0.1497, allocations: 20.16 kB / 0.9418 GB, free: 9.66 MB / 0.9011 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.581e-05/0.1497, allocations: 19.98 kB / 0.9419 GB, free: 9.641 MB / 0.9011 GB Notification: Performance of sorting global known variables: time 0.0001016/0.1498, allocations: 140.7 kB / 0.942 GB, free: 9.5 MB / 0.9011 GB Notification: Performance of sort global known variables: time 7e-08/0.1498, allocations: 0 / 0.942 GB, free: 9.5 MB / 0.9011 GB Notification: Performance of remove unused functions: time 0.0003291/0.1502, allocations: 223.5 kB / 0.9422 GB, free: 9.281 MB / 0.9011 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (15): * Single equations (assignments): 14 * 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 {(1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0001562/0.1503, allocations: 116.3 kB / 0.9423 GB, free: 9.16 MB / 0.9011 GB Notification: Performance of simCode: created initialization part: time 0.0003383/0.1507, allocations: 373.8 kB / 0.9427 GB, free: 8.766 MB / 0.9011 GB Notification: Performance of simCode: created event and clocks part: time 9.518e-06/0.1507, allocations: 8 kB / 0.9427 GB, free: 8.758 MB / 0.9011 GB Notification: Performance of simCode: created simulation system equations: time 0.0001123/0.1508, allocations: 188 kB / 0.9429 GB, free: 8.559 MB / 0.9011 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0006136/0.1514, allocations: 283.1 kB / 0.9431 GB, free: 8.289 MB / 0.9011 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001042/0.1524, allocations: 0.8961 MB / 0.944 GB, free: 7.352 MB / 0.9011 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 9.135e-05/0.1525, allocations: 153.2 kB / 0.9442 GB, free: 7.18 MB / 0.9011 GB Notification: Performance of simCode: alias equations: time 0.0001665/0.1527, allocations: 72.16 kB / 0.9442 GB, free: 7.109 MB / 0.9011 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003741/0.1531, allocations: 251 kB / 0.9445 GB, free: 6.863 MB / 0.9011 GB Notification: Performance of SimCode: time 6.62e-07/0.1531, allocations: 0 / 0.9445 GB, free: 6.863 MB / 0.9011 GB Notification: Performance of Templates: time 0.01421/0.1673, allocations: 11.33 MB / 0.9555 GB, free: 11.81 MB / 0.9167 GB " [Timeout remaining time 300] make -j1 -f Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.makefile [Timeout 300] (rm -f Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.pipe ; mkfifo Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.pipe ; head -c 1048576 < Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.pipe >> ../files/Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.sim & (cd run_cvode && ../Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction -abortSlowSimulation -alarm=240 -lv LOG_STATS -inputPath=.. -s cvode) > Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction.pipe 2>&1) [Timeout 240] (rm -f Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_gbode.pipe ; mkfifo Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_gbode.pipe ; head -c 1048576 < Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_gbode.pipe >> /var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_gbode.sim & (cd run_gbode && ../Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction -abortSlowSimulation -alarm=240 -lv LOG_STATS -inputPath=.. -s gbode -gbm=radauIIA3) > Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_gbode.pipe 2>&1) [Timeout 240] (rm -f Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_ida.pipe ; mkfifo Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_ida.pipe ; head -c 1048576 < Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_ida.pipe >> /var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_ida.sim & (cd run_ida && ../Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction -abortSlowSimulation -alarm=240 -lv LOG_STATS -inputPath=.. -s ida) > Buildings_13_Buildings.Fluid.MixingVolumes.Examples.MixingVolumeHeatConduction_ida.pipe 2>&1) [Timeout 240] [Calling sys.exit(0), Time elapsed: 5.240647376514971]