Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.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.Media.Examples.PropyleneGlycolWaterProperties,fileNamePrefix="BuildingSystems_BuildingSystems_Media_Examples_PropyleneGlycolWaterProperties",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties,fileNamePrefix="BuildingSystems_BuildingSystems_Media_Examples_PropyleneGlycolWaterProperties",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 0.0007611/0.0007613, allocations: 85.94 kB / 15.06 MB, free: 1.09 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0007701/0.0007701, allocations: 168.7 kB / 15.95 MB, free: 204 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.245/1.245, allocations: 223.2 MB / 240 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 0.001618/0.001618, allocations: 278.3 kB / 291.3 MB, free: 1.98 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 0.7711/0.7711, allocations: 144.7 MB / 487.2 MB, free: 7.137 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003921/0.0003922, allocations: 16.56 kB / 0.5686 GB, free: 38.22 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1263/0.1267, allocations: 83.08 MB / 0.6497 GB, free: 3.504 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties): time 0.004064/0.1308, allocations: 3.919 MB / 0.6535 GB, free: 15.57 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.002343/0.1332, allocations: 2.491 MB / 0.656 GB, free: 13.09 MB / 462.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 5.371e-05/0.1333, allocations: 0 / 0.656 GB, free: 13.09 MB / 462.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0001991/0.1335, allocations: 35.81 kB / 0.656 GB, free: 13.05 MB / 462.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0001987/0.1337, allocations: 84.84 kB / 0.6561 GB, free: 12.97 MB / 462.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0008452/0.1345, allocations: 399.7 kB / 0.6565 GB, free: 12.59 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.0002385/0.1348, allocations: 268.4 kB / 0.6567 GB, free: 12.32 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 3.87e-05/0.1348, allocations: 10.72 kB / 0.6567 GB, free: 12.32 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0008023/0.1356, allocations: 402.2 kB / 0.6571 GB, free: 11.93 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0001025/0.1357, allocations: 83.67 kB / 0.6572 GB, free: 11.85 MB / 462.1 MB Notification: Performance of NFPackage.collectConstants: time 1.819e-05/0.1358, allocations: 8 kB / 0.6572 GB, free: 11.84 MB / 462.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0007522/0.1365, allocations: 403.2 kB / 0.6576 GB, free: 11.45 MB / 462.1 MB Notification: Performance of NFScalarize.scalarize: time 5.372e-05/0.1366, allocations: 39.89 kB / 0.6576 GB, free: 11.41 MB / 462.1 MB Notification: Performance of NFVerifyModel.verify: time 4.248e-05/0.1366, allocations: 49.64 kB / 0.6577 GB, free: 11.36 MB / 462.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0002919/0.1369, allocations: 215.8 kB / 0.6579 GB, free: 11.14 MB / 462.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.849e-06/0.137, allocations: 0 / 0.6579 GB, free: 11.14 MB / 462.1 MB Notification: Performance of FrontEnd: time 1.764e-06/0.137, allocations: 0 / 0.6579 GB, free: 11.14 MB / 462.1 MB Notification: Performance of Transformations before backend: time 3.907e-06/0.137, allocations: 0 / 0.6579 GB, free: 11.14 MB / 462.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 39 * Number of variables: 39 Notification: Performance of Generate backend data structure: time 0.0006235/0.1376, allocations: 483 kB / 0.6583 GB, free: 10.62 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.253e-05/0.1376, allocations: 12.02 kB / 0.6583 GB, free: 10.61 MB / 462.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.161e-05/0.1377, allocations: 50.55 kB / 0.6584 GB, free: 10.55 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001312/0.1379, allocations: 23.75 kB / 0.6584 GB, free: 10.53 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002255/0.1381, allocations: 214.8 kB / 0.6586 GB, free: 10.28 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.218e-05/0.1381, allocations: 8.328 kB / 0.6586 GB, free: 10.27 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 2.275e-05/0.1381, allocations: 16 kB / 0.6586 GB, free: 10.25 MB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0003517/0.1385, allocations: 249 kB / 0.6589 GB, free: 9.988 MB / 462.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.188e-05/0.1385, allocations: 3.938 kB / 0.6589 GB, free: 9.984 MB / 462.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.844e-05/0.1385, allocations: 4 kB / 0.6589 GB, free: 9.98 MB / 462.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.382e-05/0.1386, allocations: 8 kB / 0.6589 GB, free: 9.973 MB / 462.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004511/0.139, allocations: 427.5 kB / 0.6593 GB, free: 9.555 MB / 462.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0009938/0.14, allocations: 0.9998 MB / 0.6603 GB, free: 8.461 MB / 462.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0002449/0.1403, allocations: 178.2 kB / 0.6604 GB, free: 8.281 MB / 462.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 9.113e-05/0.1404, allocations: 56.89 kB / 0.6605 GB, free: 8.223 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.001125/0.1415, allocations: 1.813 MB / 0.6623 GB, free: 6.051 MB / 462.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.333e-05/0.1416, allocations: 42.56 kB / 0.6623 GB, free: 6 MB / 462.1 MB Notification: Performance of pre-optimization done (n=15): time 1.263e-06/0.1416, allocations: 0 / 0.6623 GB, free: 6 MB / 462.1 MB Notification: Performance of matching and sorting (n=15): time 0.0002795/0.1418, allocations: 151 kB / 0.6625 GB, free: 5.848 MB / 462.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.277e-05/0.1419, allocations: 55.34 kB / 0.6625 GB, free: 5.781 MB / 462.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001487/0.142, allocations: 172.9 kB / 0.6627 GB, free: 5.594 MB / 462.1 MB Notification: Performance of collectPreVariables (initialization): time 1.876e-05/0.1421, allocations: 25.7 kB / 0.6627 GB, free: 5.562 MB / 462.1 MB Notification: Performance of collectInitialEqns (initialization): time 7.445e-05/0.1422, allocations: 139.8 kB / 0.6628 GB, free: 5.422 MB / 462.1 MB Notification: Performance of collectInitialBindings (initialization): time 4.568e-05/0.1422, allocations: 51.3 kB / 0.6629 GB, free: 5.371 MB / 462.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 9.037e-06/0.1422, allocations: 4 kB / 0.6629 GB, free: 5.367 MB / 462.1 MB Notification: Performance of setup shared object (initialization): time 0.0001068/0.1423, allocations: 330.8 kB / 0.6632 GB, free: 5.035 MB / 462.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 6.487e-05/0.1424, allocations: 31.98 kB / 0.6632 GB, free: 5.004 MB / 462.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001418/0.1426, allocations: 137.7 kB / 0.6634 GB, free: 4.82 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001012/0.1427, allocations: 55.92 kB / 0.6634 GB, free: 4.766 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.148e-06/0.1427, allocations: 4 kB / 0.6634 GB, free: 4.762 MB / 462.1 MB Notification: Performance of matching and sorting (n=30) (initialization): time 0.0003122/0.143, allocations: 206.9 kB / 0.6636 GB, free: 4.555 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.742e-05/0.143, allocations: 8.031 kB / 0.6636 GB, free: 4.547 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.697e-06/0.143, allocations: 8 kB / 0.6636 GB, free: 4.539 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.658e-05/0.1431, allocations: 15.89 kB / 0.6636 GB, free: 4.523 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001738/0.1432, allocations: 59.89 kB / 0.6637 GB, free: 4.465 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.016e-05/0.1433, allocations: 7.938 kB / 0.6637 GB, free: 4.457 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001088/0.1434, allocations: 31.69 kB / 0.6637 GB, free: 4.426 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.743e-05/0.1434, allocations: 12 kB / 0.6637 GB, free: 4.414 MB / 462.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * 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 (30): * Single equations (assignments): 29 * Array equations: 1 * 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 0.0001068/0.1435, allocations: 133.8 kB / 0.6639 GB, free: 4.273 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 3.916e-05/0.1436, allocations: 19.81 kB / 0.6639 GB, free: 4.254 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002735/0.1438, allocations: 160.5 kB / 0.664 GB, free: 4.098 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.055e-06/0.1438, allocations: 0 / 0.664 GB, free: 4.098 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.522e-06/0.1439, allocations: 7.953 kB / 0.6641 GB, free: 4.09 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.067e-06/0.1439, allocations: 0 / 0.6641 GB, free: 4.09 MB / 462.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002195/0.1441, allocations: 221.4 kB / 0.6643 GB, free: 3.824 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.342e-06/0.1441, allocations: 0 / 0.6643 GB, free: 3.824 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 8.321e-05/0.1442, allocations: 23.98 kB / 0.6643 GB, free: 3.801 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 2.114e-06/0.1442, allocations: 0 / 0.6643 GB, free: 3.801 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.16e-05/0.1442, allocations: 4 kB / 0.6643 GB, free: 3.797 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.643e-06/0.1442, allocations: 4 kB / 0.6643 GB, free: 3.793 MB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.21e-07/0.1442, allocations: 4 kB / 0.6643 GB, free: 3.789 MB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002079/0.1444, allocations: 219.2 kB / 0.6645 GB, free: 3.559 MB / 462.1 MB Notification: Performance of postOpt removeConstants (simulation): time 7.726e-05/0.1445, allocations: 112.8 kB / 0.6646 GB, free: 3.43 MB / 462.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.119e-05/0.1446, allocations: 0 / 0.6646 GB, free: 3.43 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001916/0.1448, allocations: 23.98 kB / 0.6646 GB, free: 3.406 MB / 462.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 2.069e-05/0.1448, allocations: 7.984 kB / 0.6646 GB, free: 3.398 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.7e-05/0.1448, allocations: 12 kB / 0.6647 GB, free: 3.387 MB / 462.1 MB Notification: Performance of sorting global known variables: time 8.009e-05/0.1449, allocations: 126 kB / 0.6648 GB, free: 3.266 MB / 462.1 MB Notification: Performance of sort global known variables: time 1.3e-07/0.1449, allocations: 0 / 0.6648 GB, free: 3.266 MB / 462.1 MB Notification: Performance of remove unused functions: time 0.0003516/0.1453, allocations: 75.98 kB / 0.6649 GB, free: 3.191 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 (15): * Single equations (assignments): 14 * Array equations: 1 * 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 0.0006354/0.1459, allocations: 0.8273 MB / 0.6657 GB, free: 2.336 MB / 462.1 MB Notification: Performance of simCode: created initialization part: time 0.000202/0.1461, allocations: 115.7 kB / 0.6658 GB, free: 2.223 MB / 462.1 MB Notification: Performance of simCode: created event and clocks part: time 3.717e-06/0.1461, allocations: 4.922 kB / 0.6658 GB, free: 2.219 MB / 462.1 MB Notification: Performance of simCode: created simulation system equations: time 6.118e-05/0.1462, allocations: 41.81 kB / 0.6658 GB, free: 2.18 MB / 462.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004351/0.1466, allocations: 55.89 kB / 0.6659 GB, free: 2.125 MB / 462.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001249/0.1479, allocations: 1.014 MB / 0.6669 GB, free: 1.023 MB / 462.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002323/0.1481, allocations: 0.7133 MB / 0.6676 GB, free: 292 kB / 462.1 MB Notification: Performance of simCode: alias equations: time 0.0001658/0.1483, allocations: 49.67 kB / 0.6676 GB, free: 244 kB / 462.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 6.609e-05/0.1484, allocations: 47.42 kB / 0.6676 GB, free: 196 kB / 462.1 MB Notification: Performance of SimCode: time 2.5e-07/0.1484, allocations: 0 / 0.6676 GB, free: 196 kB / 462.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.01467/0.1631, allocations: 4.729 MB / 0.6723 GB, free: 11.66 MB / 478.1 MB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001473/0.1632, allocations: 204.2 kB / 0.6725 GB, free: 11.42 MB / 478.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 1.691/1.854, allocations: 0 / 0.6725 GB, free: 11.42 MB / 478.1 MB (rm -f BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.pipe ; mkfifo BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.pipe >> ../files/BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_BuildingSystems_BuildingSystems_Media_Examples_PropyleneGlycolWaterProperties_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 BuildingSystems_BuildingSystems_Media_Examples_PropyleneGlycolWaterProperties.fmu > BuildingSystems_BuildingSystems.Media.Examples.PropyleneGlycolWaterProperties.pipe 2>&1) Environment - environmentSimulation: