Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.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 0.001949/0.001949, allocations: 93.47 kB / 20.21 MB, free: 4.211 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 0.002162/0.002162, allocations: 173.2 kB / 23.53 MB, free: 0.8906 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 1.564/1.564, allocations: 177.1 MB / 203.9 MB, free: 5.586 MB / 186.7 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA master/package.mo): time 1.117/1.117, allocations: 115 MB / 375.3 MB, free: 7.582 MB / 346.7 MB " [Timeout remaining time 179] Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 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(IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity") translateModel(IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.814e-06/1.814e-06, allocations: 0.875 kB / 480.8 MB, free: 11.95 MB / 410.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.013e-05/2.194e-05, allocations: 2.312 kB / 480.8 MB, free: 11.94 MB / 410.7 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity): time 0.07541/0.07544, allocations: 63.82 MB / 0.5319 GB, free: 8.539 MB / 458.7 MB Notification: Performance of NFInst.instExpressions: time 0.0228/0.09823, allocations: 13.27 MB / 0.5448 GB, free: 11.23 MB / 474.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002102/0.1003, allocations: 87.25 kB / 0.5449 GB, free: 11.15 MB / 474.7 MB Notification: Performance of NFTyping.typeComponents: time 0.002052/0.1024, allocations: 0.6944 MB / 0.5456 GB, free: 10.45 MB / 474.7 MB Notification: Performance of NFTyping.typeBindings: time 0.006195/0.1086, allocations: 2.152 MB / 0.5477 GB, free: 8.285 MB / 474.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.004198/0.1128, allocations: 1.613 MB / 0.5493 GB, free: 6.668 MB / 474.7 MB Notification: Performance of NFFlatten.flatten: time 0.00516/0.1179, allocations: 3.214 MB / 0.5524 GB, free: 3.441 MB / 474.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001645/0.1196, allocations: 0.8947 MB / 0.5533 GB, free: 2.516 MB / 474.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.004755/0.1243, allocations: 1.991 MB / 0.5552 GB, free: 0.5273 MB / 474.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001663/0.126, allocations: 0.7944 MB / 0.556 GB, free: 15.73 MB / 490.7 MB Notification: Performance of NFPackage.collectConstants: time 0.000249/0.1263, allocations: 120 kB / 0.5561 GB, free: 15.61 MB / 490.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.002797/0.129, allocations: 1.197 MB / 0.5573 GB, free: 14.41 MB / 490.7 MB Notification: Performance of NFScalarize.scalarize: time 0.0004077/0.1295, allocations: 322.6 kB / 0.5576 GB, free: 14.1 MB / 490.7 MB Notification: Performance of NFVerifyModel.verify: time 0.0008496/0.1303, allocations: 486.8 kB / 0.558 GB, free: 13.62 MB / 490.7 MB Notification: Performance of NFConvertDAE.convert: time 0.004358/0.1347, allocations: 2.43 MB / 0.5604 GB, free: 11.18 MB / 490.7 MB Notification: Performance of FrontEnd - DAE generated: time 5.37e-06/0.1347, allocations: 7.938 kB / 0.5604 GB, free: 11.18 MB / 490.7 MB Notification: Performance of FrontEnd: time 1.592e-06/0.1347, allocations: 0 / 0.5604 GB, free: 11.18 MB / 490.7 MB Notification: Performance of Transformations before backend: time 2.445e-05/0.1347, allocations: 0 / 0.5604 GB, free: 11.18 MB / 490.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 192 * Number of variables: 192 Notification: Performance of Generate backend data structure: time 0.003799/0.1385, allocations: 1.991 MB / 0.5624 GB, free: 9.137 MB / 490.7 MB Notification: Performance of prepare preOptimizeDAE: time 3.995e-05/0.1385, allocations: 12.03 kB / 0.5624 GB, free: 9.125 MB / 490.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01037/0.1489, allocations: 1.51 MB / 0.5639 GB, free: 7.613 MB / 490.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003183/0.1521, allocations: 1.307 MB / 0.5651 GB, free: 6.254 MB / 490.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.439e-05/0.1522, allocations: 66 kB / 0.5652 GB, free: 6.191 MB / 490.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001923/0.1524, allocations: 92 kB / 0.5653 GB, free: 6.102 MB / 490.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00468/0.157, allocations: 1.677 MB / 0.5669 GB, free: 4.328 MB / 490.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.957e-05/0.1571, allocations: 11.92 kB / 0.5669 GB, free: 4.316 MB / 490.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001158/0.1572, allocations: 32 kB / 0.567 GB, free: 4.285 MB / 490.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.942e-05/0.1572, allocations: 16 kB / 0.567 GB, free: 4.27 MB / 490.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006516/0.1637, allocations: 1.768 MB / 0.5687 GB, free: 2.504 MB / 490.7 MB 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 0.01273/0.1764, allocations: 6.894 MB / 0.5754 GB, free: 11.25 MB / 0.4948 GB Notification: Performance of preOpt comSubExp (simulation): time 0.05024/0.2267, allocations: 6.868 MB / 0.5821 GB, free: 4.363 MB / 0.4948 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.002953/0.2296, allocations: 0.7796 MB / 0.5829 GB, free: 3.582 MB / 0.4948 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003512/0.23, allocations: 87.94 kB / 0.583 GB, free: 3.496 MB / 0.4948 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.546e-05/0.23, allocations: 41.39 kB / 0.583 GB, free: 3.445 MB / 0.4948 GB Notification: Performance of pre-optimization done (n=43): time 2.104e-06/0.23, allocations: 0 / 0.583 GB, free: 3.445 MB / 0.4948 GB Notification: Performance of matching and sorting (n=43): time 0.0136/0.2436, allocations: 2.858 MB / 0.5858 GB, free: 0.5742 MB / 0.4948 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.178e-05/0.2437, allocations: 55.41 kB / 0.5859 GB, free: 0.5078 MB / 0.4948 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002243/0.2459, allocations: 1.339 MB / 0.5872 GB, free: 15.15 MB / 0.5105 GB Notification: Performance of collectPreVariables (initialization): time 0.0001341/0.2461, allocations: 45.7 kB / 0.5872 GB, free: 15.1 MB / 0.5105 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007455/0.2468, allocations: 0.7099 MB / 0.5879 GB, free: 14.38 MB / 0.5105 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002182/0.247, allocations: 162.7 kB / 0.5881 GB, free: 14.22 MB / 0.5105 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004596/0.2475, allocations: 224.2 kB / 0.5883 GB, free: 13.99 MB / 0.5105 GB Notification: Performance of setup shared object (initialization): time 0.000307/0.2478, allocations: 0.5238 MB / 0.5888 GB, free: 13.46 MB / 0.5105 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003105/0.2509, allocations: 0.7883 MB / 0.5896 GB, free: 12.67 MB / 0.5105 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003889/0.2548, allocations: 1.706 MB / 0.5912 GB, free: 10.65 MB / 0.5105 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.005643/0.2604, allocations: 1.68 MB / 0.5929 GB, free: 8.801 MB / 0.5105 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.207e-06/0.2605, allocations: 3.984 kB / 0.5929 GB, free: 8.797 MB / 0.5105 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.008121/0.2686, allocations: 2.057 MB / 0.5949 GB, free: 6.727 MB / 0.5105 GB Notification: Performance of prepare postOptimizeDAE: time 3.163e-05/0.2686, allocations: 12 kB / 0.5949 GB, free: 6.715 MB / 0.5105 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.751e-05/0.2686, allocations: 12.03 kB / 0.5949 GB, free: 6.707 MB / 0.5105 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001191/0.2698, allocations: 282.2 kB / 0.5952 GB, free: 6.43 MB / 0.5105 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00198/0.2718, allocations: 335.5 kB / 0.5955 GB, free: 6.102 MB / 0.5105 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001564/0.2734, allocations: 1.143 MB / 0.5966 GB, free: 4.926 MB / 0.5105 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002339/0.2757, allocations: 287.3 kB / 0.5969 GB, free: 4.645 MB / 0.5105 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001301/0.2758, allocations: 43.97 kB / 0.5969 GB, free: 4.602 MB / 0.5105 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003478/0.2793, allocations: 1.059 MB / 0.598 GB, free: 3.539 MB / 0.5105 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.003975/0.2833, allocations: 1.694 MB / 0.5996 GB, free: 1.535 MB / 0.5105 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0056/0.2889, allocations: 1.678 MB / 0.6013 GB, free: 15.68 MB / 0.5261 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 7.905e-06/0.2889, allocations: 8 kB / 0.6013 GB, free: 15.68 MB / 0.5261 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.008125/0.297, allocations: 2.042 MB / 0.6033 GB, free: 13.62 MB / 0.5261 GB Notification: Performance of prepare postOptimizeDAE: time 2.654e-05/0.297, allocations: 12 kB / 0.6033 GB, free: 13.61 MB / 0.5261 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.447e-05/0.2971, allocations: 8 kB / 0.6033 GB, free: 13.6 MB / 0.5261 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001003/0.2981, allocations: 271.7 kB / 0.6035 GB, free: 13.33 MB / 0.5261 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001925/0.3, allocations: 323.6 kB / 0.6038 GB, free: 13.02 MB / 0.5261 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001522/0.3015, allocations: 1.138 MB / 0.605 GB, free: 11.85 MB / 0.5261 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00248/0.304, allocations: 279.5 kB / 0.6052 GB, free: 11.57 MB / 0.5261 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000121/0.3041, allocations: 43.97 kB / 0.6053 GB, free: 11.53 MB / 0.5261 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 41 * 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 (74): * Single equations (assignments): 73 * 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 {(1,14)} Notification: Performance of prepare postOptimizeDAE: time 0.0004058/0.3045, allocations: 327.8 kB / 0.6056 GB, free: 11.2 MB / 0.5261 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003028/0.3048, allocations: 131.2 kB / 0.6057 GB, free: 11.07 MB / 0.5261 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007416/0.3122, allocations: 1.866 MB / 0.6075 GB, free: 9.195 MB / 0.5261 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.548e-05/0.3122, allocations: 4 kB / 0.6075 GB, free: 9.191 MB / 0.5261 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.2e-06/0.3122, allocations: 0 / 0.6075 GB, free: 9.191 MB / 0.5261 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.642e-06/0.3123, allocations: 0 / 0.6075 GB, free: 9.191 MB / 0.5261 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01024/0.3225, allocations: 3.527 MB / 0.611 GB, free: 5.527 MB / 0.5261 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.439e-05/0.3225, allocations: 8.062 kB / 0.611 GB, free: 5.52 MB / 0.5261 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001551/0.3241, allocations: 236.1 kB / 0.6112 GB, free: 5.289 MB / 0.5261 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009158/0.325, allocations: 263.4 kB / 0.6115 GB, free: 5.027 MB / 0.5261 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.894e-05/0.3251, allocations: 19.97 kB / 0.6115 GB, free: 5.008 MB / 0.5261 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001768/0.3268, allocations: 1.154 MB / 0.6126 GB, free: 3.824 MB / 0.5261 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.33e-06/0.3268, allocations: 3.938 kB / 0.6126 GB, free: 3.82 MB / 0.5261 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007386/0.3342, allocations: 1.971 MB / 0.6145 GB, free: 1.789 MB / 0.5261 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006654/0.3349, allocations: 243 kB / 0.6148 GB, free: 1.551 MB / 0.5261 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001801/0.3351, allocations: 11.98 kB / 0.6148 GB, free: 1.539 MB / 0.5261 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001803/0.3369, allocations: 211.8 kB / 0.615 GB, free: 1.332 MB / 0.5261 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.61e-05/0.337, allocations: 39.88 kB / 0.615 GB, free: 1.293 MB / 0.5261 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001002/0.3371, allocations: 27.97 kB / 0.615 GB, free: 1.266 MB / 0.5261 GB Notification: Performance of sorting global known variables: time 0.001366/0.3384, allocations: 0.8127 MB / 0.6158 GB, free: 456 kB / 0.5261 GB Notification: Performance of sort global known variables: time 9.1e-08/0.3384, allocations: 0 / 0.6158 GB, free: 456 kB / 0.5261 GB Notification: Performance of remove unused functions: time 0.002027/0.3404, allocations: 0.6588 MB / 0.6165 GB, free: 15.78 MB / 0.5417 GB Notification: Model statistics after passing the back-end for simulation: * 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 simulation (33): * Single equations (assignments): 28 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,16)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0007205/0.3412, allocations: 381.5 kB / 0.6168 GB, free: 15.41 MB / 0.5417 GB Notification: Performance of simCode: created initialization part: time 0.01005/0.3512, allocations: 2.752 MB / 0.6195 GB, free: 12.66 MB / 0.5417 GB Notification: Performance of simCode: created event and clocks part: time 5.029e-06/0.3512, allocations: 0 / 0.6195 GB, free: 12.66 MB / 0.5417 GB Notification: Performance of simCode: created simulation system equations: time 0.003113/0.3543, allocations: 0.8291 MB / 0.6203 GB, free: 11.82 MB / 0.5417 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002134/0.3565, allocations: 452.3 kB / 0.6208 GB, free: 11.39 MB / 0.5417 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.05048/0.4069, allocations: 7.708 MB / 0.6283 GB, free: 3.605 MB / 0.5417 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005973/0.4075, allocations: 495.3 kB / 0.6288 GB, free: 3.086 MB / 0.5417 GB Notification: Performance of simCode: alias equations: time 0.001299/0.4088, allocations: 254 kB / 0.629 GB, free: 2.844 MB / 0.5417 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003785/0.4092, allocations: 88.45 kB / 0.6291 GB, free: 2.758 MB / 0.5417 GB Notification: Performance of SimCode: time 1.233e-06/0.4092, allocations: 0 / 0.6291 GB, free: 2.758 MB / 0.5417 GB Notification: Performance of Templates: time 0.2076/0.6168, allocations: 24.93 MB / 0.6534 GB, free: 167.7 MB / 0.5573 GB " [Timeout remaining time 659] make -j1 -f IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.makefile [Timeout 660] (rm -f IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.sim & ./IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity -abortSlowSimulation -alarm=240 -lv LOG_STATS > IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_LimitedCapacity.pipe 2>&1) [Timeout 240] [Calling sys.exit(0), Time elapsed: 6.999800413963385]