Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised,fileNamePrefix="Buildings_8_Buildings_Fluid_Examples_Performance_PressureDrop_ParallelDpOptimised",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised,fileNamePrefix="Buildings_8_Buildings_Fluid_Examples_Performance_PressureDrop_ParallelDpOptimised",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 0.0009911/0.0009911, allocations: 86.41 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 0.001131/0.001131, 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 3.2.3+maint.om/package.mo): time 1.446/1.446, allocations: 205.4 MB / 222.1 MB, free: 5.645 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.672/1.672, allocations: 292.7 MB / 0.5499 GB, free: 14.53 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0004927/0.0004928, allocations: 19.66 kB / 0.6738 GB, free: 26.01 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.189/0.1895, allocations: 116.3 MB / 0.7874 GB, free: 11.82 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised): time 0.5315/0.721, allocations: 146.7 MB / 0.9307 GB, free: 5.82 MB / 0.7169 GB Notification: Performance of NFInst.instExpressions: time 0.004211/0.7253, allocations: 3.355 MB / 0.934 GB, free: 5.719 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004689/0.7258, allocations: 10.69 kB / 0.934 GB, free: 5.719 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.0005016/0.7263, allocations: 114.7 kB / 0.9341 GB, free: 5.715 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.001107/0.7274, allocations: 393.1 kB / 0.9345 GB, free: 5.695 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.001123/0.7286, allocations: 373.3 kB / 0.9348 GB, free: 5.684 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.002731/0.7313, allocations: 3.021 MB / 0.9378 GB, free: 5.668 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002672/0.734, allocations: 2.153 MB / 0.9399 GB, free: 5.359 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002073/0.7361, allocations: 0.8734 MB / 0.9407 GB, free: 5.332 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001166/0.7373, allocations: 0.7058 MB / 0.9414 GB, free: 5.184 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0001076/0.7374, allocations: 35.75 kB / 0.9415 GB, free: 5.184 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001367/0.7388, allocations: 0.5508 MB / 0.942 GB, free: 5.141 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.0003667/0.7391, allocations: 278 kB / 0.9423 GB, free: 5.098 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.0007382/0.7399, allocations: 229.3 kB / 0.9425 GB, free: 21.03 MB / 0.7325 GB Notification: Performance of NFConvertDAE.convert: time 0.001509/0.7414, allocations: 1.046 MB / 0.9435 GB, free: 20.93 MB / 0.7325 GB Notification: Performance of FrontEnd - DAE generated: time 5.44e-06/0.7414, allocations: 0 / 0.9435 GB, free: 20.93 MB / 0.7325 GB Notification: Performance of FrontEnd: time 2.234e-06/0.7414, allocations: 4.531 kB / 0.9435 GB, free: 20.92 MB / 0.7325 GB Notification: Performance of Transformations before backend: time 2.222e-05/0.7415, allocations: 3.938 kB / 0.9435 GB, free: 20.92 MB / 0.7325 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 125 * Number of variables: 125 Notification: Performance of Generate backend data structure: time 0.002099/0.7436, allocations: 1.327 MB / 0.9448 GB, free: 20.11 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 4.364e-05/0.7436, allocations: 13.11 kB / 0.9448 GB, free: 20.11 MB / 0.7325 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001163/0.7437, allocations: 93.08 kB / 0.9449 GB, free: 20.07 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007199/0.7445, allocations: 195.2 kB / 0.9451 GB, free: 20.01 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001411/0.7459, allocations: 0.8014 MB / 0.9459 GB, free: 19.67 MB / 0.7325 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.999e-05/0.7459, allocations: 44.53 kB / 0.9459 GB, free: 19.67 MB / 0.7325 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.704e-05/0.746, allocations: 59.31 kB / 0.946 GB, free: 19.67 MB / 0.7325 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001211/0.7473, allocations: 0.8279 MB / 0.9468 GB, free: 19.42 MB / 0.7325 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.702e-05/0.7473, allocations: 1.938 kB / 0.9468 GB, free: 19.42 MB / 0.7325 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.607e-05/0.7473, allocations: 26.16 kB / 0.9468 GB, free: 19.41 MB / 0.7325 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.658e-05/0.7474, allocations: 12.84 kB / 0.9468 GB, free: 19.41 MB / 0.7325 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0008944/0.7483, allocations: 0.5653 MB / 0.9474 GB, free: 19.39 MB / 0.7325 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 0.003798/0.7521, allocations: 4.267 MB / 0.9515 GB, free: 16.48 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007088/0.7528, allocations: 446.6 kB / 0.952 GB, free: 16.45 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004572/0.7533, allocations: 352.9 kB / 0.9523 GB, free: 16.43 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002743/0.7536, allocations: 199.8 kB / 0.9525 GB, free: 16.24 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004857/0.7541, allocations: 329.8 kB / 0.9528 GB, free: 16.17 MB / 0.7325 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0003685/0.7544, allocations: 42.25 kB / 0.9529 GB, free: 16.15 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=33): time 1.943e-06/0.7544, allocations: 0 / 0.9529 GB, free: 16.15 MB / 0.7325 GB Notification: Performance of matching and sorting (n=33): time 0.00134/0.7558, allocations: 0.7077 MB / 0.9535 GB, free: 16.05 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.065e-05/0.7559, allocations: 81.77 kB / 0.9536 GB, free: 15.96 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001363/0.7572, allocations: 1.149 MB / 0.9547 GB, free: 15.81 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 5.364e-05/0.7573, allocations: 37.95 kB / 0.9548 GB, free: 15.78 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003357/0.7576, allocations: 492 kB / 0.9553 GB, free: 15.61 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 7.75e-05/0.7577, allocations: 116.7 kB / 0.9554 GB, free: 15.54 MB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 2.666e-05/0.7578, allocations: 7.969 kB / 0.9554 GB, free: 15.54 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 9.58e-05/0.7579, allocations: 325 kB / 0.9557 GB, free: 15.23 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003397/0.7582, allocations: 206.2 kB / 0.9559 GB, free: 15.23 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004775/0.7587, allocations: 0.5266 MB / 0.9564 GB, free: 14.87 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004259/0.7591, allocations: 324.7 kB / 0.9567 GB, free: 14.8 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.812e-06/0.7591, allocations: 2.219 kB / 0.9567 GB, free: 14.8 MB / 0.7325 GB Notification: Performance of matching and sorting (n=56) (initialization): time 0.001103/0.7602, allocations: 0.7212 MB / 0.9574 GB, free: 14.65 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001094/0.7604, allocations: 279.3 kB / 0.9577 GB, free: 14.34 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.005e-05/0.7604, allocations: 5.5 kB / 0.9577 GB, free: 14.34 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.964e-05/0.7604, allocations: 8.938 kB / 0.9577 GB, free: 14.34 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004756/0.7609, allocations: 120.8 kB / 0.9578 GB, free: 14.32 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.429e-05/0.7609, allocations: 14.06 kB / 0.9578 GB, free: 14.32 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0008702/0.7618, allocations: 96 kB / 0.9579 GB, free: 14.3 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.523e-05/0.7619, allocations: 23.59 kB / 0.9579 GB, free: 14.3 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 7.274e-06/0.7619, allocations: 6.469 kB / 0.9579 GB, free: 14.3 MB / 0.7325 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.000872/0.7628, allocations: 0.586 MB / 0.9585 GB, free: 14.22 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.993e-06/0.7628, allocations: 6.125 kB / 0.9585 GB, free: 14.22 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 9.127e-06/0.7628, allocations: 8.25 kB / 0.9585 GB, free: 14.22 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004072/0.7632, allocations: 112 kB / 0.9586 GB, free: 14.21 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.798e-06/0.7632, allocations: 10.73 kB / 0.9586 GB, free: 14.21 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007393/0.764, allocations: 85.25 kB / 0.9587 GB, free: 14.21 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.417e-05/0.764, allocations: 24.23 kB / 0.9587 GB, free: 14.21 MB / 0.7325 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 ($whenCondition1,$PRE.pulse_p.T_start,pulse_p.T_start,$PRE.pulse_p.count,pulse_p.count) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (55): * Single equations (assignments): 54 * Array equations: 0 * Algorithm blocks: 1 * 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 0.0005339/0.7646, allocations: 480.3 kB / 0.9592 GB, free: 14 MB / 0.7325 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001183/0.7647, allocations: 104.2 kB / 0.9593 GB, free: 13.95 MB / 0.7325 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009257/0.7656, allocations: 0.5541 MB / 0.9598 GB, free: 13.88 MB / 0.7325 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.684e-06/0.7656, allocations: 7.016 kB / 0.9598 GB, free: 13.88 MB / 0.7325 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.209e-06/0.7657, allocations: 0 / 0.9598 GB, free: 13.88 MB / 0.7325 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.25e-06/0.7657, allocations: 1.125 kB / 0.9599 GB, free: 13.88 MB / 0.7325 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002027/0.7677, allocations: 1.504 MB / 0.9613 GB, free: 13.42 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.689e-06/0.7677, allocations: 4.234 kB / 0.9613 GB, free: 13.42 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003067/0.768, allocations: 77.27 kB / 0.9614 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (simulation): time 6.311e-06/0.768, allocations: 2.719 kB / 0.9614 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.558e-05/0.7681, allocations: 16.83 kB / 0.9614 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.639e-06/0.7681, allocations: 7.078 kB / 0.9614 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.106e-06/0.7681, allocations: 2.656 kB / 0.9614 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0008268/0.7689, allocations: 0.6706 MB / 0.9621 GB, free: 13.14 MB / 0.7325 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00036/0.7693, allocations: 232 kB / 0.9623 GB, free: 13 MB / 0.7325 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001222/0.7694, allocations: 9.125 kB / 0.9623 GB, free: 13 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005953/0.77, allocations: 72.91 kB / 0.9624 GB, free: 12.98 MB / 0.7325 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.69e-05/0.7701, allocations: 35.27 kB / 0.9624 GB, free: 12.98 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.865e-05/0.7702, allocations: 12.91 kB / 0.9624 GB, free: 12.98 MB / 0.7325 GB Notification: Performance of sorting global known variables: time 0.0009559/0.7711, allocations: 0.8148 MB / 0.9632 GB, free: 12.87 MB / 0.7325 GB Notification: Performance of sort global known variables: time 2e-07/0.7711, allocations: 4 kB / 0.9632 GB, free: 12.86 MB / 0.7325 GB Notification: Performance of remove unused functions: time 0.001252/0.7724, allocations: 421.4 kB / 0.9636 GB, free: 12.84 MB / 0.7325 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_p.T_start,pulse_p.count) * Number of discrete states: 1 (pulse_p.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (33): * Single equations (assignments): 31 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 0.00135/0.7737, allocations: 1.292 MB / 0.9649 GB, free: 12.02 MB / 0.7325 GB Notification: Performance of simCode: created initialization part: time 0.001327/0.7751, allocations: 0.8814 MB / 0.9657 GB, free: 11.86 MB / 0.7325 GB Notification: Performance of simCode: created event and clocks part: time 3.015e-06/0.7751, allocations: 1.75 kB / 0.9658 GB, free: 11.86 MB / 0.7325 GB Notification: Performance of simCode: created simulation system equations: time 0.0003407/0.7755, allocations: 236.9 kB / 0.966 GB, free: 11.84 MB / 0.7325 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002879/0.7783, allocations: 0.6312 MB / 0.9666 GB, free: 11.8 MB / 0.7325 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01024/0.7886, allocations: 6.498 MB / 0.9729 GB, free: 9.066 MB / 0.7325 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006225/0.7893, allocations: 1.182 MB / 0.9741 GB, free: 8.188 MB / 0.7325 GB Notification: Performance of simCode: alias equations: time 0.001255/0.7905, allocations: 438.9 kB / 0.9745 GB, free: 8 MB / 0.7325 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003945/0.7909, allocations: 335.9 kB / 0.9748 GB, free: 7.965 MB / 0.7325 GB Notification: Performance of SimCode: time 7.42e-07/0.7909, allocations: 0 / 0.9748 GB, free: 7.965 MB / 0.7325 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.0465/0.8374, allocations: 28.53 MB / 1.003 GB, free: 8.465 MB / 0.7481 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001883/0.8377, allocations: 253.5 kB / 1.003 GB, free: 8.176 MB / 0.7481 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.254/3.091, allocations: 0 / 1.003 GB, free: 8.176 MB / 0.7481 GB (rm -f Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.pipe ; mkfifo Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.pipe >> ../files/Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_8_Buildings_Fluid_Examples_Performance_PressureDrop_ParallelDpOptimised_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_8_Buildings_Fluid_Examples_Performance_PressureDrop_ParallelDpOptimised.fmu > Buildings_8_Buildings.Fluid.Examples.Performance.PressureDrop.ParallelDpOptimised.pipe 2>&1) Environment - environmentSimulation: