Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.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/IDEAS 3.0.0/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/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(IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve,fileNamePrefix="IDEAS_IDEAS_Fluid_Actuators_Valves_Simplified_Examples_Thermostatic3WayValve",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve,fileNamePrefix="IDEAS_IDEAS_Fluid_Actuators_Valves_Simplified_Examples_Thermostatic3WayValve",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 0.0008003/0.0008004, allocations: 84.38 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 0.0008795/0.0008796, 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 1.448/1.448, allocations: 223.3 MB / 240 MB, free: 5.422 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.8074/0.8074, allocations: 132.3 MB / 423.4 MB, free: 2.09 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0005081/0.0005084, allocations: 8 kB / 0.5035 GB, free: 4.191 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4872/0.4877, allocations: 81.58 MB / 0.5832 GB, free: 3.898 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve): time 0.0449/0.5327, allocations: 44.27 MB / 0.6264 GB, free: 2.531 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.01863/0.5514, allocations: 12.5 MB / 0.6386 GB, free: 7.621 MB / 478.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002438/0.5538, allocations: 59.62 kB / 0.6387 GB, free: 7.562 MB / 478.1 MB Notification: Performance of NFTyping.typeComponents: time 0.00213/0.556, allocations: 0.6056 MB / 0.6393 GB, free: 6.953 MB / 478.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/Fluid/Actuators/Valves/Simplified/Thermostatic3WayValve.mo:34:3-38:63:writable] Warning: Conditional component ‘vol‘ is used in a non-connect context. Notification: Performance of NFTyping.typeBindings: time 0.004723/0.5607, allocations: 1.712 MB / 0.6409 GB, free: 5.238 MB / 478.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003982/0.5647, allocations: 1.378 MB / 0.6423 GB, free: 3.875 MB / 478.1 MB Notification: Performance of NFFlatten.flatten: time 0.005617/0.5703, allocations: 4.665 MB / 0.6468 GB, free: 15.2 MB / 494.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00175/0.5721, allocations: 1.076 MB / 0.6479 GB, free: 14.09 MB / 494.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002577/0.5747, allocations: 1.303 MB / 0.6492 GB, free: 12.79 MB / 494.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001505/0.5762, allocations: 1.097 MB / 0.6502 GB, free: 11.68 MB / 494.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0001625/0.5764, allocations: 60 kB / 0.6503 GB, free: 11.62 MB / 494.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.002785/0.5792, allocations: 1.057 MB / 0.6513 GB, free: 10.57 MB / 494.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0004335/0.5796, allocations: 342.7 kB / 0.6516 GB, free: 10.23 MB / 494.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0004959/0.5801, allocations: 332.9 kB / 0.652 GB, free: 9.898 MB / 494.1 MB Notification: Performance of NFConvertDAE.convert: time 0.002556/0.5827, allocations: 2.139 MB / 0.6541 GB, free: 7.754 MB / 494.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.41e-06/0.5827, allocations: 0 / 0.6541 GB, free: 7.754 MB / 494.1 MB Notification: Performance of FrontEnd: time 3.677e-06/0.5827, allocations: 3.984 kB / 0.6541 GB, free: 7.75 MB / 494.1 MB Notification: Performance of Transformations before backend: time 2.131e-05/0.5828, allocations: 0 / 0.6541 GB, free: 7.75 MB / 494.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 230 * Number of variables: 230 Notification: Performance of Generate backend data structure: time 0.002802/0.5856, allocations: 1.741 MB / 0.6558 GB, free: 5.957 MB / 494.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.332e-05/0.5856, allocations: 8.031 kB / 0.6558 GB, free: 5.949 MB / 494.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001801/0.5858, allocations: 143.7 kB / 0.6559 GB, free: 5.801 MB / 494.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00868/0.5945, allocations: 1.621 MB / 0.6575 GB, free: 4.176 MB / 494.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002979/0.5975, allocations: 1.366 MB / 0.6588 GB, free: 2.754 MB / 494.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003107/0.5978, allocations: 146.1 kB / 0.659 GB, free: 2.613 MB / 494.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001606/0.598, allocations: 103.9 kB / 0.6591 GB, free: 2.512 MB / 494.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00484/0.6028, allocations: 1.733 MB / 0.6607 GB, free: 0.7383 MB / 494.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.578e-05/0.6029, allocations: 8 kB / 0.6608 GB, free: 0.7305 MB / 494.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001035/0.603, allocations: 40 kB / 0.6608 GB, free: 0.6914 MB / 494.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.344e-05/0.603, allocations: 23.98 kB / 0.6608 GB, free: 0.668 MB / 494.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.007243/0.6103, allocations: 2.088 MB / 0.6629 GB, free: 14.58 MB / 0.4981 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 0.01391/0.6242, allocations: 6.743 MB / 0.6694 GB, free: 7.488 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.006503/0.6308, allocations: 1.708 MB / 0.6711 GB, free: 5.77 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003225/0.634, allocations: 0.8626 MB / 0.672 GB, free: 4.906 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.004599/0.6386, allocations: 3.577 MB / 0.6754 GB, free: 0.8516 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.996e-05/0.6387, allocations: 38.88 kB / 0.6755 GB, free: 0.8047 MB / 0.4981 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0005319/0.6392, allocations: 71.12 kB / 0.6755 GB, free: 0.7344 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=45): time 2.855e-06/0.6392, allocations: 0 / 0.6755 GB, free: 0.7344 MB / 0.4981 GB Notification: Performance of matching and sorting (n=45): time 0.00971/0.649, allocations: 2.491 MB / 0.678 GB, free: 14.23 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.588e-05/0.649, allocations: 55.41 kB / 0.678 GB, free: 14.17 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002377/0.6514, allocations: 1.362 MB / 0.6794 GB, free: 12.8 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 0.0001176/0.6515, allocations: 37.7 kB / 0.6794 GB, free: 12.75 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006108/0.6522, allocations: 0.661 MB / 0.68 GB, free: 12.09 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002141/0.6524, allocations: 169.6 kB / 0.6802 GB, free: 11.92 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 7.102e-05/0.6525, allocations: 12 kB / 0.6802 GB, free: 11.91 MB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0001101/0.6526, allocations: 334 kB / 0.6805 GB, free: 11.57 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003368/0.656, allocations: 0.8801 MB / 0.6814 GB, free: 10.7 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003528/0.6595, allocations: 1.16 MB / 0.6825 GB, free: 9.422 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003209/0.6627, allocations: 0.8569 MB / 0.6834 GB, free: 8.566 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.209e-05/0.6628, allocations: 4 kB / 0.6834 GB, free: 8.562 MB / 0.5137 GB Notification: Performance of matching and sorting (n=91) (initialization): time 0.007361/0.6701, allocations: 2.113 MB / 0.6854 GB, free: 6.441 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 0.0002138/0.6704, allocations: 317.8 kB / 0.6857 GB, free: 6.027 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.97e-05/0.6704, allocations: 8 kB / 0.6857 GB, free: 6.02 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.949e-05/0.6704, allocations: 12 kB / 0.6858 GB, free: 6.008 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002024/0.6725, allocations: 455.4 kB / 0.6862 GB, free: 5.562 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.482e-05/0.6725, allocations: 12 kB / 0.6862 GB, free: 5.551 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002519/0.675, allocations: 378.8 kB / 0.6866 GB, free: 5.184 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001454/0.6752, allocations: 43.97 kB / 0.6866 GB, free: 5.141 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 1.023e-05/0.6752, allocations: 7.938 kB / 0.6866 GB, free: 5.133 MB / 0.5137 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.006696/0.6819, allocations: 1.898 MB / 0.6885 GB, free: 3.23 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.046e-05/0.6819, allocations: 8 kB / 0.6885 GB, free: 3.223 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.629e-05/0.682, allocations: 12 kB / 0.6885 GB, free: 3.211 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001895/0.6839, allocations: 447.7 kB / 0.6889 GB, free: 2.773 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.1e-05/0.6839, allocations: 19.89 kB / 0.6889 GB, free: 2.754 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002314/0.6862, allocations: 336.3 kB / 0.6893 GB, free: 2.426 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001186/0.6863, allocations: 51.91 kB / 0.6893 GB, free: 2.375 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 34 * 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 (90): * Single equations (assignments): 89 * 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 0.0007895/0.6871, allocations: 416.8 kB / 0.6897 GB, free: 1.957 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003971/0.6876, allocations: 142.2 kB / 0.6898 GB, free: 1.816 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007493/0.6951, allocations: 2.132 MB / 0.6919 GB, free: 15.69 MB / 0.5294 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.034e-05/0.6951, allocations: 7.984 kB / 0.6919 GB, free: 15.68 MB / 0.5294 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.742e-06/0.6951, allocations: 3.953 kB / 0.6919 GB, free: 15.68 MB / 0.5294 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.006342/0.7015, allocations: 1.892 MB / 0.6938 GB, free: 13.74 MB / 0.5294 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 postOpt removeSimpleEquations (simulation): time 0.009229/0.7107, allocations: 3.44 MB / 0.6971 GB, free: 10.2 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.286e-06/0.7107, allocations: 4.031 kB / 0.6971 GB, free: 10.19 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001789/0.7125, allocations: 367.5 kB / 0.6975 GB, free: 9.832 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.2e-05/0.7126, allocations: 4 kB / 0.6975 GB, free: 9.828 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.174e-05/0.7126, allocations: 23.97 kB / 0.6975 GB, free: 9.805 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.736e-06/0.7127, allocations: 4 kB / 0.6975 GB, free: 9.801 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.306e-06/0.7127, allocations: 4.031 kB / 0.6975 GB, free: 9.797 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01019/0.7229, allocations: 2.971 MB / 0.7004 GB, free: 6.789 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0008279/0.7237, allocations: 351.1 kB / 0.7008 GB, free: 6.426 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000349/0.7241, allocations: 11.98 kB / 0.7008 GB, free: 6.414 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002219/0.7263, allocations: 319.6 kB / 0.7011 GB, free: 6.102 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000112/0.7265, allocations: 48.31 kB / 0.7011 GB, free: 6.051 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001013/0.7266, allocations: 31.97 kB / 0.7012 GB, free: 6.02 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.001682/0.7283, allocations: 0.9477 MB / 0.7021 GB, free: 5.074 MB / 0.5294 GB Notification: Performance of sort global known variables: time 1.81e-07/0.7283, allocations: 0 / 0.7021 GB, free: 5.074 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.002344/0.7306, allocations: 0.7644 MB / 0.7028 GB, free: 4.309 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 3 (thermostatic3WayValve.vol.dynBal.U,thermostatic3WayValve.k_state,T_out.T) * 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 (58): * Single equations (assignments): 50 * 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: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.01132/0.7419, allocations: 3.894 MB / 0.7066 GB, free: 392 kB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.01051/0.7525, allocations: 2.898 MB / 0.7095 GB, free: 13.49 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 8.837e-06/0.7525, allocations: 4.484 kB / 0.7095 GB, free: 13.48 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.003273/0.7558, allocations: 0.9277 MB / 0.7104 GB, free: 12.55 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004564/0.7604, allocations: 0.7454 MB / 0.7111 GB, free: 11.82 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02852/0.7889, allocations: 10.79 MB / 0.7216 GB, free: 0.5898 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009098/0.7899, allocations: 1.222 MB / 0.7228 GB, free: 15.34 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.002662/0.7926, allocations: 413 kB / 0.7232 GB, free: 14.95 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001105/0.7937, allocations: 0.5578 MB / 0.7238 GB, free: 14.39 MB / 0.5606 GB Notification: Performance of SimCode: time 1.654e-06/0.7937, allocations: 0 / 0.7238 GB, free: 14.39 MB / 0.5606 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08496/0.8787, allocations: 44.22 MB / 0.767 GB, free: 2.789 MB / 0.5919 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002208/0.8789, allocations: 246.6 kB / 0.7672 GB, free: 2.543 MB / 0.5919 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.747/3.626, allocations: 0 / 0.7672 GB, free: 2.543 MB / 0.5919 GB (rm -f IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe ; mkfifo IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe >> ../files/IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IDEAS_IDEAS_Fluid_Actuators_Valves_Simplified_Examples_Thermostatic3WayValve_fmu --startTime=0 --stopTime=15 --timeout=50 --tolerance=1e-06 IDEAS_IDEAS_Fluid_Actuators_Valves_Simplified_Examples_Thermostatic3WayValve.fmu > IDEAS_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe 2>&1) Environment - environmentSimulation: