Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.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: "" <> buildModelFMU(BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid,fileNamePrefix="BuildingSystems_BuildingSystems_Utilities_Psychrometrics_Examples_SaturationPressureLiquid",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid,fileNamePrefix="BuildingSystems_BuildingSystems_Utilities_Psychrometrics_Examples_SaturationPressureLiquid",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0007825/0.0007825, allocations: 100.1 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 0.0008314/0.0008313, 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 1.28/1.28, allocations: 223.2 MB / 239.9 MB, free: 5.445 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.001709/0.001709, allocations: 266.7 kB / 291.2 MB, free: 2.004 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 0.8249/0.8249, allocations: 144.6 MB / 487 MB, free: 7.172 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0004981/0.0004982, allocations: 14.17 kB / 0.5684 GB, free: 38.33 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1779/0.1785, allocations: 83.08 MB / 0.6495 GB, free: 3.488 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid): time 0.00154/0.1801, allocations: 1.127 MB / 0.6506 GB, free: 2.352 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.0003976/0.1805, allocations: 183.7 kB / 0.6508 GB, free: 2.172 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 2.903e-05/0.1805, allocations: 0 / 0.6508 GB, free: 2.172 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 1.629e-05/0.1806, allocations: 5.969 kB / 0.6508 GB, free: 2.168 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 4.71e-05/0.1806, allocations: 3.984 kB / 0.6508 GB, free: 2.164 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0001869/0.1808, allocations: 15.97 kB / 0.6508 GB, free: 2.148 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 5.548e-05/0.1809, allocations: 15.98 kB / 0.6508 GB, free: 2.133 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 9.072e-05/0.181, allocations: 12.56 kB / 0.6509 GB, free: 2.121 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 4.716e-05/0.181, allocations: 8.562 kB / 0.6509 GB, free: 2.113 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 4.168e-05/0.1811, allocations: 8.516 kB / 0.6509 GB, free: 2.105 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 1.089e-05/0.1811, allocations: 0 / 0.6509 GB, free: 2.105 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 8.425e-05/0.1812, allocations: 28.64 kB / 0.6509 GB, free: 2.078 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 7.934e-06/0.1812, allocations: 0 / 0.6509 GB, free: 2.078 MB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 2.899e-05/0.1812, allocations: 34.83 kB / 0.6509 GB, free: 2.039 MB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 9.322e-05/0.1813, allocations: 23.95 kB / 0.651 GB, free: 2.016 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.105e-06/0.1813, allocations: 0 / 0.651 GB, free: 2.016 MB / 446.1 MB Notification: Performance of FrontEnd: time 2.214e-06/0.1813, allocations: 2.031 kB / 0.651 GB, free: 2.016 MB / 446.1 MB Notification: Performance of Transformations before backend: time 4.098e-06/0.1813, allocations: 0 / 0.651 GB, free: 2.016 MB / 446.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 3 * Number of variables: 3 Notification: Performance of Generate backend data structure: time 0.0004205/0.1818, allocations: 348.2 kB / 0.6513 GB, free: 1.629 MB / 446.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.117e-05/0.1818, allocations: 12.03 kB / 0.6513 GB, free: 1.617 MB / 446.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 3.488e-05/0.1819, allocations: 31.28 kB / 0.6513 GB, free: 1.578 MB / 446.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001106/0.182, allocations: 7.984 kB / 0.6513 GB, free: 1.57 MB / 446.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0001126/0.1821, allocations: 164.3 kB / 0.6515 GB, free: 1.371 MB / 446.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.101e-05/0.1821, allocations: 3.938 kB / 0.6515 GB, free: 1.367 MB / 446.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 7.664e-06/0.1821, allocations: 0 / 0.6515 GB, free: 1.367 MB / 446.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0001713/0.1823, allocations: 55.45 kB / 0.6515 GB, free: 1.309 MB / 446.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 6.492e-06/0.1823, allocations: 0 / 0.6515 GB, free: 1.309 MB / 446.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.083e-05/0.1823, allocations: 4.531 kB / 0.6516 GB, free: 1.305 MB / 446.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.969e-06/0.1824, allocations: 4.562 kB / 0.6516 GB, free: 1.301 MB / 446.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0001703/0.1825, allocations: 46.61 kB / 0.6516 GB, free: 1.258 MB / 446.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0003411/0.1829, allocations: 249.7 kB / 0.6518 GB, free: 0.9648 MB / 446.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0001245/0.183, allocations: 36.66 kB / 0.6519 GB, free: 0.9219 MB / 446.1 MB Notification: Performance of preOpt evalFunc (simulation): time 1.54e-05/0.183, allocations: 0.6562 kB / 0.6519 GB, free: 0.9219 MB / 446.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.791e-05/0.1831, allocations: 43.36 kB / 0.6519 GB, free: 0.8711 MB / 446.1 MB Notification: Performance of pre-optimization done (n=2): time 9.62e-07/0.1831, allocations: 3.938 kB / 0.6519 GB, free: 0.8672 MB / 446.1 MB Notification: Performance of matching and sorting (n=2): time 0.0003505/0.1834, allocations: 97.58 kB / 0.652 GB, free: 0.7695 MB / 446.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.311e-05/0.1835, allocations: 51.41 kB / 0.6521 GB, free: 0.707 MB / 446.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 7.343e-05/0.1836, allocations: 98.58 kB / 0.6522 GB, free: 0.6016 MB / 446.1 MB Notification: Performance of collectPreVariables (initialization): time 1.546e-05/0.1836, allocations: 32.14 kB / 0.6522 GB, free: 0.5664 MB / 446.1 MB Notification: Performance of collectInitialEqns (initialization): time 3.863e-05/0.1836, allocations: 84.14 kB / 0.6523 GB, free: 492 kB / 446.1 MB Notification: Performance of collectInitialBindings (initialization): time 2.049e-05/0.1836, allocations: 11.83 kB / 0.6523 GB, free: 480 kB / 446.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 3.136e-06/0.1837, allocations: 0 / 0.6523 GB, free: 480 kB / 446.1 MB Notification: Performance of setup shared object (initialization): time 0.0001061/0.1838, allocations: 314.8 kB / 0.6526 GB, free: 156 kB / 446.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 8.48e-05/0.1839, allocations: 26.55 kB / 0.6526 GB, free: 132 kB / 446.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 6.992e-05/0.1839, allocations: 15.98 kB / 0.6526 GB, free: 116 kB / 446.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 8.103e-05/0.184, allocations: 29.53 kB / 0.6526 GB, free: 88 kB / 446.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.724e-06/0.184, allocations: 4.688 kB / 0.6527 GB, free: 84 kB / 446.1 MB Notification: Performance of matching and sorting (n=2) (initialization): time 0.0001826/0.1842, allocations: 72.17 kB / 0.6527 GB, free: 8 kB / 446.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.535e-05/0.1842, allocations: 4.531 kB / 0.6527 GB, free: 4 kB / 446.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.352e-06/0.1843, allocations: 4 kB / 0.6527 GB, free: 0 / 446.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.184e-05/0.1843, allocations: 1.719 kB / 0.6527 GB, free: 0 / 446.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001085/0.1844, allocations: 12.05 kB / 0.6527 GB, free: 15.98 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.99e-06/0.1844, allocations: 0 / 0.6527 GB, free: 15.98 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 5.503e-05/0.1845, allocations: 15.5 kB / 0.6528 GB, free: 15.97 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.27e-06/0.1845, allocations: 7.938 kB / 0.6528 GB, free: 15.96 MB / 462.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1 * 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 (2): * Single equations (assignments): 2 * 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: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 6.782e-05/0.1846, allocations: 109.8 kB / 0.6529 GB, free: 15.85 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 2.155e-05/0.1846, allocations: 4 kB / 0.6529 GB, free: 15.84 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002457/0.1848, allocations: 95.42 kB / 0.653 GB, free: 15.75 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.385e-06/0.1848, allocations: 3.938 kB / 0.653 GB, free: 15.75 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.689e-06/0.1849, allocations: 0 / 0.653 GB, free: 15.75 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.294e-06/0.1849, allocations: 224 / 0.653 GB, free: 15.75 MB / 462.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001414/0.185, allocations: 161.6 kB / 0.6531 GB, free: 15.54 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.805e-06/0.185, allocations: 4 kB / 0.6531 GB, free: 15.54 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 6.535e-05/0.1851, allocations: 11.98 kB / 0.6531 GB, free: 15.53 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 1.793e-06/0.1851, allocations: 0 / 0.6531 GB, free: 15.53 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.123e-06/0.1851, allocations: 3.938 kB / 0.6531 GB, free: 15.52 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.102e-06/0.1851, allocations: 0 / 0.6531 GB, free: 15.52 MB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.032e-06/0.1851, allocations: 0 / 0.6531 GB, free: 15.52 MB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002473/0.1854, allocations: 191.3 kB / 0.6533 GB, free: 15.32 MB / 462.1 MB Notification: Performance of postOpt removeConstants (simulation): time 3.57e-05/0.1854, allocations: 81.11 kB / 0.6534 GB, free: 15.22 MB / 462.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.356e-05/0.1854, allocations: 0 / 0.6534 GB, free: 15.22 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 7.814e-05/0.1855, allocations: 7.984 kB / 0.6534 GB, free: 15.21 MB / 462.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.611e-05/0.1856, allocations: 8 kB / 0.6534 GB, free: 15.21 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.045e-06/0.1856, allocations: 0 / 0.6534 GB, free: 15.21 MB / 462.1 MB Notification: Performance of sorting global known variables: time 3.565e-05/0.1856, allocations: 83.28 kB / 0.6535 GB, free: 15.12 MB / 462.1 MB Notification: Performance of sort global known variables: time 1.1e-07/0.1856, allocations: 0 / 0.6535 GB, free: 15.12 MB / 462.1 MB Notification: Performance of remove unused functions: time 0.000207/0.1858, allocations: 4 kB / 0.6535 GB, free: 15.12 MB / 462.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * 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 (3): * Single equations (assignments): 3 * 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: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0004683/0.1863, allocations: 0.7085 MB / 0.6542 GB, free: 14.38 MB / 462.1 MB Notification: Performance of simCode: created initialization part: time 0.0002031/0.1865, allocations: 55.89 kB / 0.6542 GB, free: 14.33 MB / 462.1 MB Notification: Performance of simCode: created event and clocks part: time 1.863e-06/0.1865, allocations: 0 / 0.6542 GB, free: 14.33 MB / 462.1 MB Notification: Performance of simCode: created simulation system equations: time 8.404e-05/0.1866, allocations: 27.98 kB / 0.6543 GB, free: 14.3 MB / 462.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002064/0.1868, allocations: 1.875 kB / 0.6543 GB, free: 14.3 MB / 462.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0004236/0.1873, allocations: 166.3 kB / 0.6544 GB, free: 14.1 MB / 462.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002105/0.1875, allocations: 0.6809 MB / 0.6551 GB, free: 13.39 MB / 462.1 MB Notification: Performance of simCode: alias equations: time 2.908e-05/0.1875, allocations: 0 / 0.6551 GB, free: 13.39 MB / 462.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 3.54e-05/0.1876, allocations: 7.438 kB / 0.6551 GB, free: 13.38 MB / 462.1 MB Notification: Performance of SimCode: time 2.3e-07/0.1876, allocations: 0 / 0.6551 GB, free: 13.38 MB / 462.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 4.58/4.767, allocations: 1.114 MB / 0.6562 GB, free: 12.45 MB / 462.1 MB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002028/4.768, allocations: 211 kB / 0.6564 GB, free: 12.21 MB / 462.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 1.787/6.555, allocations: 0 / 0.6564 GB, free: 12.21 MB / 462.1 MB (rm -f BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.pipe ; mkfifo BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.pipe >> ../files/BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_BuildingSystems_BuildingSystems_Utilities_Psychrometrics_Examples_SaturationPressureLiquid_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 BuildingSystems_BuildingSystems_Utilities_Psychrometrics_Examples_SaturationPressureLiquid.fmu > BuildingSystems_BuildingSystems.Utilities.Psychrometrics.Examples.SaturationPressureLiquid.pipe 2>&1) Environment - environmentSimulation: