Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.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 0.002246/0.002246, allocations: 93.47 kB / 19.44 MB, free: 336 kB / 13.93 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 0.002771/0.002771, allocations: 169.2 kB / 22.76 MB, free: 1.664 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 1.584/1.584, allocations: 177.1 MB / 203.1 MB, free: 5.551 MB / 186.7 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ExternalMedia 4.1.1/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ExternalMedia 4.1.1/package.mo): time 0.01409/0.01409, allocations: 1.989 MB / 261.5 MB, free: 11.1 MB / 250.7 MB " [Timeout remaining time 180] Using package ExternalMedia with version 4.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ExternalMedia 4.1.1/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(ExternalMedia.Test.GenericModels.TestRunnerTwoPhase,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase") translateModel(ExternalMedia.Test.GenericModels.TestRunnerTwoPhase,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.392e-06/1.392e-06, allocations: 0 / 331.6 MB, free: 17.27 MB / 266.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.261e-05/2.4e-05, allocations: 7.156 kB / 331.6 MB, free: 17.27 MB / 266.7 MB Notification: Performance of NFInst.instantiate(ExternalMedia.Test.GenericModels.TestRunnerTwoPhase): time 0.2942/0.2943, allocations: 110.1 MB / 441.8 MB, free: 16.96 MB / 330.7 MB Notification: Performance of NFInst.instExpressions: time 0.06582/0.3601, allocations: 61.29 MB / 0.4913 GB, free: 13.05 MB / 362.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001988/0.3621, allocations: 15.94 kB / 0.4913 GB, free: 13.04 MB / 362.7 MB Notification: Performance of NFTyping.typeComponents: time 0.003149/0.3652, allocations: 1.005 MB / 0.4923 GB, free: 12.03 MB / 362.7 MB Notification: Performance of NFTyping.typeBindings: time 0.04452/0.4097, allocations: 13.2 MB / 0.5051 GB, free: 14.76 MB / 378.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.009113/0.4189, allocations: 3.164 MB / 0.5082 GB, free: 11.59 MB / 378.7 MB Notification: Performance of NFFlatten.flatten: time 0.005073/0.4239, allocations: 3.094 MB / 0.5113 GB, free: 8.48 MB / 378.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003041/0.4242, allocations: 76.34 kB / 0.5113 GB, free: 8.387 MB / 378.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002985/0.4272, allocations: 1.539 MB / 0.5128 GB, free: 6.844 MB / 378.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001433/0.4287, allocations: 0.7791 MB / 0.5136 GB, free: 6.062 MB / 378.7 MB Notification: Performance of NFPackage.collectConstants: time 0.0002226/0.4289, allocations: 144 kB / 0.5137 GB, free: 5.922 MB / 378.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.02836/0.4572, allocations: 10.73 MB / 0.5242 GB, free: 11.18 MB / 394.7 MB Notification: Performance of NFScalarize.scalarize: time 0.0007408/0.458, allocations: 382.2 kB / 0.5246 GB, free: 10.81 MB / 394.7 MB Notification: Performance of NFVerifyModel.verify: time 0.00187/0.4598, allocations: 0.7327 MB / 0.5253 GB, free: 10.07 MB / 394.7 MB Notification: Performance of NFConvertDAE.convert: time 0.03186/0.4917, allocations: 10.04 MB / 0.5351 GB, free: 8 kB / 394.7 MB Notification: Performance of FrontEnd - DAE generated: time 5.41e-06/0.4917, allocations: 0 / 0.5351 GB, free: 8 kB / 394.7 MB Notification: Performance of FrontEnd: time 1.223e-06/0.4917, allocations: 3.938 kB / 0.5351 GB, free: 4 kB / 394.7 MB Notification: Performance of Transformations before backend: time 4.06e-05/0.4918, allocations: 4 kB / 0.5351 GB, free: 0 / 394.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 526 * Number of variables: 526 Notification: Performance of Generate backend data structure: time 0.008464/0.5002, allocations: 3.448 MB / 0.5385 GB, free: 12.48 MB / 410.7 MB Notification: Performance of prepare preOptimizeDAE: time 4.517e-05/0.5003, allocations: 12.03 kB / 0.5385 GB, free: 12.47 MB / 410.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01727/0.5175, allocations: 3.097 MB / 0.5415 GB, free: 9.367 MB / 410.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002772/0.5203, allocations: 1.146 MB / 0.5426 GB, free: 8.191 MB / 410.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002131/0.5205, allocations: 168.5 kB / 0.5428 GB, free: 8.023 MB / 410.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000463/0.521, allocations: 200.4 kB / 0.543 GB, free: 7.828 MB / 410.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.02478/0.5458, allocations: 7.876 MB / 0.5507 GB, free: 15.68 MB / 426.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 5.088e-05/0.5458, allocations: 384 / 0.5507 GB, free: 15.68 MB / 426.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002778/0.5461, allocations: 91.94 kB / 0.5508 GB, free: 15.59 MB / 426.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0003025/0.5464, allocations: 55.94 kB / 0.5508 GB, free: 15.54 MB / 426.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02637/0.5728, allocations: 8.465 MB / 0.5591 GB, free: 7.062 MB / 426.7 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 0.196/0.7688, allocations: 11.2 MB / 0.57 GB, free: 163.8 MB / 426.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01761/0.7864, allocations: 6.142 MB / 0.576 GB, free: 163.4 MB / 426.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.001645/0.7881, allocations: 1.122 MB / 0.5771 GB, free: 163 MB / 426.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.09149/0.8795, allocations: 29.99 MB / 0.6064 GB, free: 141.8 MB / 426.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.905e-05/0.8796, allocations: 63.39 kB / 0.6065 GB, free: 141.7 MB / 426.7 MB Notification: Performance of pre-optimization done (n=242): time 4.879e-06/0.8796, allocations: 0 / 0.6065 GB, free: 141.7 MB / 426.7 MB Notification: Performance of matching and sorting (n=246): time 0.04384/0.9234, allocations: 16.4 MB / 0.6225 GB, free: 125.9 MB / 426.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 4.921e-05/0.9235, allocations: 103.1 kB / 0.6226 GB, free: 125.8 MB / 426.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005073/0.924, allocations: 0.5389 MB / 0.6231 GB, free: 125.2 MB / 426.7 MB Notification: Performance of collectPreVariables (initialization): time 0.0003339/0.9243, allocations: 69.69 kB / 0.6232 GB, free: 125.2 MB / 426.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002561/0.9246, allocations: 0.6243 MB / 0.6238 GB, free: 124.6 MB / 426.7 MB Notification: Performance of collectInitialBindings (initialization): time 0.0007822/0.9254, allocations: 0.9371 MB / 0.6247 GB, free: 123.7 MB / 426.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.00146/0.9268, allocations: 1.1 MB / 0.6258 GB, free: 122.5 MB / 426.7 MB Notification: Performance of setup shared object (initialization): time 8.976e-05/0.9269, allocations: 496.4 kB / 0.6262 GB, free: 122.1 MB / 426.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003318/0.9302, allocations: 2.519 MB / 0.6287 GB, free: 119.5 MB / 426.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.004272/0.9345, allocations: 3.313 MB / 0.6319 GB, free: 115.9 MB / 426.7 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.007803/0.9423, allocations: 5.4 MB / 0.6372 GB, free: 110.3 MB / 426.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.028e-05/0.9423, allocations: 4 kB / 0.6372 GB, free: 110.3 MB / 426.7 MB Notification: Performance of matching and sorting (n=308) (initialization): time 0.01105/0.9534, allocations: 6.427 MB / 0.6435 GB, free: 103.8 MB / 426.7 MB Notification: Performance of prepare postOptimizeDAE: time 3.096e-05/0.9534, allocations: 14.19 kB / 0.6435 GB, free: 103.8 MB / 426.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.177e-05/0.9534, allocations: 15.94 kB / 0.6435 GB, free: 103.8 MB / 426.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001288/0.9547, allocations: 290.8 kB / 0.6438 GB, free: 103.5 MB / 426.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003429/0.9581, allocations: 1.061 MB / 0.6448 GB, free: 102.5 MB / 426.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001475/0.9596, allocations: 2.658 MB / 0.6474 GB, free: 99.71 MB / 426.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00214/0.9618, allocations: 75.98 kB / 0.6475 GB, free: 99.64 MB / 426.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005809/0.9623, allocations: 395.6 kB / 0.6479 GB, free: 99.25 MB / 426.7 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 61 * Number of states: 0 () * Number of discrete variables: 17 (testBasePropertiesDynamic.medium.phase,testBasePropertiesImplicit.medium2.baseProperties.phase,testBasePropertiesImplicit.medium1.baseProperties.phase,testBasePropertiesExplicit.medium2.baseProperties.phase,testBasePropertiesExplicit.medium1.baseProperties.phase,testStatesSat.state2.phase,testStatesSat.state1.phase,testStates.state2.phase,testStates.state1.phase,testStatesSat.completeBubbleDewStates2.bubbleStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates2.bubbleStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates2.dewStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates2.dewStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates1.bubbleStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates1.bubbleStateOnePhase.state.phase,testStatesSat.completeBubbleDewStates1.dewStateTwoPhase.state.phase,testStatesSat.completeBubbleDewStates1.dewStateOnePhase.state.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (293): * Single equations (assignments): 287 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(3,8), (1,1), (1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.001245/0.9636, allocations: 471.1 kB / 0.6483 GB, free: 98.78 MB / 426.7 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001168/0.9647, allocations: 199.3 kB / 0.6485 GB, free: 98.59 MB / 426.7 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02243/0.9872, allocations: 27.12 MB / 0.675 GB, free: 71.43 MB / 426.7 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001018/0.9873, allocations: 131.8 kB / 0.6751 GB, free: 71.3 MB / 426.7 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.3e-05/0.9873, allocations: 3.938 kB / 0.6751 GB, free: 71.3 MB / 426.7 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.203e-05/0.9873, allocations: 15.94 kB / 0.6751 GB, free: 71.29 MB / 426.7 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02781/1.015, allocations: 35.69 MB / 0.71 GB, free: 34.66 MB / 426.7 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.649e-05/1.015, allocations: 0 / 0.71 GB, free: 34.66 MB / 426.7 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003201/1.018, allocations: 0.6589 MB / 0.7106 GB, free: 34 MB / 426.7 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0007021/1.019, allocations: 398.5 kB / 0.711 GB, free: 33.59 MB / 426.7 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.000383/1.019, allocations: 71.94 kB / 0.7111 GB, free: 33.52 MB / 426.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001099/1.021, allocations: 2.631 MB / 0.7137 GB, free: 30.8 MB / 426.7 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.633e-06/1.021, allocations: 0 / 0.7137 GB, free: 30.8 MB / 426.7 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.009372/1.03, allocations: 7.46 MB / 0.7209 GB, free: 23.24 MB / 426.7 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0004945/1.03, allocations: 309 kB / 0.7212 GB, free: 22.93 MB / 426.7 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000259/1.031, allocations: 55.92 kB / 0.7213 GB, free: 22.88 MB / 426.7 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001255/1.032, allocations: 67.98 kB / 0.7214 GB, free: 22.81 MB / 426.7 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000393/1.032, allocations: 201.8 kB / 0.7216 GB, free: 22.61 MB / 426.7 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.000198/1.033, allocations: 91.94 kB / 0.7216 GB, free: 22.52 MB / 426.7 MB Notification: Performance of sorting global known variables: time 0.0002203/1.033, allocations: 275 kB / 0.7219 GB, free: 22.25 MB / 426.7 MB Notification: Performance of sort global known variables: time 9.1e-08/1.033, allocations: 0 / 0.7219 GB, free: 22.25 MB / 426.7 MB Notification: Performance of remove unused functions: time 0.005548/1.038, allocations: 1.756 MB / 0.7236 GB, free: 20.5 MB / 426.7 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 2 (testBasePropertiesDynamic.medium.p,testBasePropertiesDynamic.medium.h) * Number of discrete variables: 68 ($cse1.region3boundary,$cse2.region3boundary,$cse3.phase,$cse3.region,$cse4.phase,$cse4.region,$cse5.region3boundary,$cse6.region3boundary,$cse7.phase,$cse7.region,$cse8.phase,$cse8.region,$cse9.phase,$cse9.region,$cse10.phase,$cse10.region,$cse11.phase,$cse11.region,$cse12.phase,$cse12.region,$cse13.phase,$cse13.region,$cse14.phase,$cse14.region,$cse15.phase,$cse15.region,$cse16.phase,$cse16.region,$cse17.phase,$cse17.region,$cse18.phase,$cse18.region,$cse19.phase,$cse19.region,$cse20.phase,$cse20.region,$cse21.phase,$cse21.region,$cse22.phase,$cse22.region,$cse23.phase,$cse23.region,$cse24.phase,$cse24.region,$cse25.region3boundary,$cse26.region3boundary,$cse27.region3boundary,$cse28.region3boundary,$cse29.phase,$cse29.region,$cse30.phase,$cse30.region,$cse31.phase,$cse31.region,$cse32.phase,$cse32.region,$cse33.region3boundary,$cse34.phase,$cse34.region,$cse35.region3boundary,$cse36.region3boundary,$cse37.phase,$cse37.region,testBasePropertiesExplicit.medium1.baseProperties.phase,testBasePropertiesExplicit.medium2.baseProperties.phase,testBasePropertiesImplicit.medium1.baseProperties.phase,testBasePropertiesImplicit.medium2.baseProperties.phase,testBasePropertiesDynamic.medium.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (275): * Single equations (assignments): 234 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 38 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(1,1), (1,2), (1,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005356/1.044, allocations: 1.741 MB / 0.7253 GB, free: 18.92 MB / 426.7 MB Notification: Performance of simCode: created initialization part: time 0.009149/1.053, allocations: 5.375 MB / 0.7306 GB, free: 13.51 MB / 426.7 MB Notification: Performance of simCode: created event and clocks part: time 7.734e-06/1.053, allocations: 4.938 kB / 0.7306 GB, free: 13.51 MB / 426.7 MB Notification: Performance of simCode: created simulation system equations: time 0.003419/1.056, allocations: 2.4 MB / 0.7329 GB, free: 11.09 MB / 426.7 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003466/1.06, allocations: 0.7217 MB / 0.7336 GB, free: 10.44 MB / 426.7 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008413/1.068, allocations: 6.461 MB / 0.7399 GB, free: 3.922 MB / 426.7 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008538/1.069, allocations: 1.215 MB / 0.7411 GB, free: 2.664 MB / 426.7 MB Notification: Performance of simCode: alias equations: time 0.1692/1.238, allocations: 11.51 MB / 0.7524 GB, free: 160.6 MB / 426.7 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.002025/1.24, allocations: 494.1 kB / 0.7528 GB, free: 160.6 MB / 426.7 MB Notification: Performance of SimCode: time 1.613e-06/1.24, allocations: 0 / 0.7528 GB, free: 160.6 MB / 426.7 MB Notification: Performance of Templates: time 0.1154/1.356, allocations: 110.7 MB / 0.861 GB, free: 58.95 MB / 426.7 MB " [Timeout remaining time 659] make -j1 -f ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.makefile [Timeout 660] (rm -f ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.pipe ; mkfifo ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.pipe ; head -c 1048576 < ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.pipe >> ../files/ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.sim & ./ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase -abortSlowSimulation -alarm=240 -lv LOG_STATS > ExternalMedia_ExternalMedia.Test.GenericModels.TestRunnerTwoPhase.pipe 2>&1) [Timeout 240] [Calling sys.exit(0), Time elapsed: 12.552731659030542]