Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP") translateModel(BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008517/0.0008517, allocations: 99.86 kB / 15.05 MB, free: 1.105 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001214/0.001214, allocations: 177.3 kB / 15.95 MB, free: 216 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.172/1.172, allocations: 223.2 MB / 239.9 MB, free: 5.43 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.001623/0.001624, allocations: 266.8 kB / 291.2 MB, free: 1.984 MB / 238.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:5:3-5:34:writable] Warning: Got element f_alp that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:6:3-6:35:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_lay but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:6:3-6:35:writable] Warning: Got element f_lay that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:7:3-7:37:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_loss but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:7:3-7:37:writable] Warning: Got element f_loss that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:8:3-8:33:writable] Warning: Elements in the package.mo-file need to be in the same relative order as the package.order file. Got element named f_pv but it was already added because it was not the next element in the list at that time. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:8:3-8:33:writable] Warning: Got element f_pv that was not referenced in the package.order file. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Buildings/Airvolumes/Parameter/package.mo:2:1-34:14:writable] Warning: f_pv was referenced in the package.order file, but was not found in package.mo, f_pv/package.mo or f_pv.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.7318/0.7318, allocations: 144.6 MB / 487 MB, free: 7.172 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0004371/0.0004373, allocations: 14.53 kB / 0.5683 GB, free: 38.16 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1239/0.1244, allocations: 83.09 MB / 0.6494 GB, free: 3.598 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP): time 0.09018/0.2146, allocations: 110.6 MB / 0.7574 GB, free: 4.785 MB / 0.545 GB Notification: Performance of NFInst.instExpressions: time 0.02429/0.2389, allocations: 19.95 MB / 0.7769 GB, free: 0.8008 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003331/0.2423, allocations: 103.2 kB / 0.777 GB, free: 0.6992 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.2717/0.514, allocations: 1.354 MB / 0.7783 GB, free: 39.15 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.01137/0.5254, allocations: 4.193 MB / 0.7824 GB, free: 39.14 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.00657/0.532, allocations: 2.569 MB / 0.7849 GB, free: 39.09 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.007268/0.5392, allocations: 3.915 MB / 0.7888 GB, free: 39.09 MB / 0.5606 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002814/0.5421, allocations: 1.717 MB / 0.7904 GB, free: 38.86 MB / 0.5606 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004318/0.5464, allocations: 2.029 MB / 0.7924 GB, free: 38.86 MB / 0.5606 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002552/0.549, allocations: 1.256 MB / 0.7936 GB, free: 38.85 MB / 0.5606 GB Notification: Performance of NFPackage.collectConstants: time 0.0003247/0.5493, allocations: 89.75 kB / 0.7937 GB, free: 38.85 MB / 0.5606 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003921/0.5532, allocations: 1.337 MB / 0.795 GB, free: 38.85 MB / 0.5606 GB Notification: Performance of NFScalarize.scalarize: time 0.000379/0.5536, allocations: 405.3 kB / 0.7954 GB, free: 38.84 MB / 0.5606 GB Notification: Performance of NFVerifyModel.verify: time 0.0007806/0.5544, allocations: 0.5506 MB / 0.796 GB, free: 38.81 MB / 0.5606 GB Notification: Performance of NFConvertDAE.convert: time 0.003192/0.5576, allocations: 3.115 MB / 0.799 GB, free: 38.59 MB / 0.5606 GB Notification: Performance of FrontEnd - DAE generated: time 2.194e-06/0.5576, allocations: 0 / 0.799 GB, free: 38.59 MB / 0.5606 GB Notification: Performance of FrontEnd: time 1.452e-06/0.5576, allocations: 0 / 0.799 GB, free: 38.59 MB / 0.5606 GB Notification: Performance of Transformations before backend: time 3.724e-05/0.5577, allocations: 1.375 kB / 0.799 GB, free: 38.59 MB / 0.5606 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 388 * Number of variables: 388 Notification: Performance of Generate backend data structure: time 0.00465/0.5623, allocations: 2.699 MB / 0.8016 GB, free: 37.14 MB / 0.5606 GB Notification: Performance of prepare preOptimizeDAE: time 3.134e-05/0.5624, allocations: 8.812 kB / 0.8016 GB, free: 37.14 MB / 0.5606 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004049/0.5664, allocations: 0.9539 MB / 0.8026 GB, free: 36.95 MB / 0.5606 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003341/0.5698, allocations: 2.091 MB / 0.8046 GB, free: 36.48 MB / 0.5606 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0008721/0.5707, allocations: 328.9 kB / 0.8049 GB, free: 36.45 MB / 0.5606 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002094/0.5709, allocations: 162.7 kB / 0.8051 GB, free: 36.45 MB / 0.5606 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003492/0.5744, allocations: 1.961 MB / 0.807 GB, free: 36.22 MB / 0.5606 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.562e-05/0.5744, allocations: 0 / 0.807 GB, free: 36.22 MB / 0.5606 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001351/0.5746, allocations: 68.14 kB / 0.8071 GB, free: 36.22 MB / 0.5606 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.488e-05/0.5746, allocations: 37.81 kB / 0.8071 GB, free: 36.22 MB / 0.5606 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003964/0.5786, allocations: 1.886 MB / 0.8089 GB, free: 36.17 MB / 0.5606 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 0.01006/0.5886, allocations: 9.168 MB / 0.8179 GB, free: 31.57 MB / 0.5606 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003801/0.5925, allocations: 1.329 MB / 0.8192 GB, free: 31.25 MB / 0.5606 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006524/0.5931, allocations: 1.714 MB / 0.8209 GB, free: 29.25 MB / 0.5606 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.096e-05/0.5932, allocations: 51.72 kB / 0.8209 GB, free: 29.21 MB / 0.5606 GB Notification: Performance of pre-optimization done (n=76): time 2.054e-06/0.5932, allocations: 0 / 0.8209 GB, free: 29.21 MB / 0.5606 GB Notification: Performance of matching and sorting (n=76): time 0.007338/0.6005, allocations: 2.483 MB / 0.8233 GB, free: 28.3 MB / 0.5606 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.503e-05/0.6005, allocations: 87.34 kB / 0.8234 GB, free: 28.2 MB / 0.5606 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003034/0.6036, allocations: 2.549 MB / 0.8259 GB, free: 27.57 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 9.634e-05/0.6037, allocations: 43.23 kB / 0.826 GB, free: 27.54 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005994/0.6043, allocations: 1.045 MB / 0.827 GB, free: 27.18 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001905/0.6045, allocations: 271.2 kB / 0.8272 GB, free: 26.99 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 5.87e-05/0.6046, allocations: 19.06 kB / 0.8273 GB, free: 26.99 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 5.626e-05/0.6046, allocations: 349.3 kB / 0.8276 GB, free: 26.67 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001508/0.6061, allocations: 0.6241 MB / 0.8282 GB, free: 26.54 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001671/0.6078, allocations: 0.9953 MB / 0.8292 GB, free: 25.99 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001547/0.6094, allocations: 0.6865 MB / 0.8298 GB, free: 25.88 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.27e-06/0.6094, allocations: 3.312 kB / 0.8298 GB, free: 25.88 MB / 0.5606 GB Notification: Performance of matching and sorting (n=133) (initialization): time 0.00412/0.6135, allocations: 1.961 MB / 0.8318 GB, free: 25.39 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 1.817e-05/0.6135, allocations: 9.859 kB / 0.8318 GB, free: 25.39 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.129e-05/0.6136, allocations: 13.22 kB / 0.8318 GB, free: 25.38 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001338/0.6149, allocations: 439.6 kB / 0.8322 GB, free: 25.22 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001086/0.616, allocations: 310.8 kB / 0.8325 GB, free: 25.16 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001746/0.6178, allocations: 1.55 MB / 0.834 GB, free: 24 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002799/0.6206, allocations: 473.5 kB / 0.8345 GB, free: 23.8 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001143/0.6207, allocations: 62.16 kB / 0.8345 GB, free: 23.79 MB / 0.5606 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 35 * 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 (112): * Single equations (assignments): 110 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {1 13,1 8} Notification: Performance of prepare postOptimizeDAE: time 0.000772/0.6215, allocations: 462.2 kB / 0.835 GB, free: 23.66 MB / 0.5606 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002664/0.6217, allocations: 250.4 kB / 0.8352 GB, free: 23.53 MB / 0.5606 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002981/0.6247, allocations: 1.538 MB / 0.8367 GB, free: 23.1 MB / 0.5606 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.399e-05/0.6248, allocations: 11.72 kB / 0.8367 GB, free: 23.1 MB / 0.5606 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.982e-06/0.6248, allocations: 0 / 0.8367 GB, free: 23.1 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 9.047e-06/0.6248, allocations: 3.984 kB / 0.8367 GB, free: 23.09 MB / 0.5606 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006105/0.6309, allocations: 3.719 MB / 0.8404 GB, free: 21.63 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.356e-06/0.6309, allocations: 7.312 kB / 0.8404 GB, free: 21.63 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005354/0.6315, allocations: 136.7 kB / 0.8405 GB, free: 21.6 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001206/0.6327, allocations: 438.4 kB / 0.8409 GB, free: 21.44 MB / 0.5606 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.189e-05/0.6327, allocations: 31.08 kB / 0.8409 GB, free: 21.43 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00202/0.6348, allocations: 1.628 MB / 0.8425 GB, free: 20.25 MB / 0.5606 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.707e-06/0.6348, allocations: 7.031 kB / 0.8425 GB, free: 20.25 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004961/0.6397, allocations: 2.34 MB / 0.8448 GB, free: 18.92 MB / 0.5606 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0008624/0.6406, allocations: 0.5297 MB / 0.8453 GB, free: 18.5 MB / 0.5606 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002837/0.6409, allocations: 18.5 kB / 0.8454 GB, free: 18.49 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001584/0.6425, allocations: 194.2 kB / 0.8455 GB, free: 18.31 MB / 0.5606 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.941e-05/0.6426, allocations: 57.72 kB / 0.8456 GB, free: 18.27 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.672e-05/0.6427, allocations: 41.97 kB / 0.8456 GB, free: 18.23 MB / 0.5606 GB Notification: Performance of sorting global known variables: time 0.00226/0.6449, allocations: 1.793 MB / 0.8474 GB, free: 16.96 MB / 0.5606 GB Notification: Performance of sort global known variables: time 2.4e-07/0.6449, allocations: 4 kB / 0.8474 GB, free: 16.96 MB / 0.5606 GB Notification: Performance of remove unused functions: time 0.001623/0.6466, allocations: 0.6901 MB / 0.8481 GB, free: 16.32 MB / 0.5606 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 14 * 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 (63): * Single equations (assignments): 53 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 8 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {1 15,1 9} Notification: Performance of Backend phase and start with SimCode phase: time 0.0007839/0.6473, allocations: 0.6081 MB / 0.8487 GB, free: 15.79 MB / 0.5606 GB Notification: Performance of simCode: created initialization part: time 0.003313/0.6507, allocations: 1.422 MB / 0.85 GB, free: 14.71 MB / 0.5606 GB Notification: Performance of simCode: created event and clocks part: time 3.467e-06/0.6507, allocations: 2.625 kB / 0.85 GB, free: 14.71 MB / 0.5606 GB Notification: Performance of simCode: created simulation system equations: time 0.001917/0.6526, allocations: 0.7241 MB / 0.8508 GB, free: 14.14 MB / 0.5606 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004595/0.6572, allocations: 1.261 MB / 0.852 GB, free: 13.12 MB / 0.5606 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0048/0.662, allocations: 4.179 MB / 0.8561 GB, free: 9.242 MB / 0.5606 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000618/0.6627, allocations: 1.532 MB / 0.8576 GB, free: 7.699 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.001554/0.6642, allocations: 442 kB / 0.858 GB, free: 7.27 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003105/0.6645, allocations: 173.6 kB / 0.8581 GB, free: 7.105 MB / 0.5606 GB Notification: Performance of SimCode: time 6.91e-07/0.6645, allocations: 0 / 0.8581 GB, free: 7.105 MB / 0.5606 GB Notification: Performance of Templates: time 0.06497/0.7295, allocations: 47.68 MB / 0.9047 GB, free: 8.375 MB / 0.6075 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.makefile Environment - environmentSimulation: (rm -f BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.sim & ./BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.Chillers.Validation.CarnotVerifyCOP.pipe 2>&1) Environment - environmentSimulation: