Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.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.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck,tolerance=1e-08,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck") translateModel(BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck,tolerance=1e-08,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008205/0.0008206, allocations: 100.2 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 0.0008751/0.0008751, 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 1.153/1.153, allocations: 223.2 MB / 239.9 MB, free: 5.438 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.001611/0.001611, allocations: 262.7 kB / 291.3 MB, free: 1.996 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 0.7124/0.7124, allocations: 144.6 MB / 487 MB, free: 7.184 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003803/0.0003804, allocations: 14.88 kB / 0.5683 GB, free: 38.21 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1257/0.1261, allocations: 83.09 MB / 0.6494 GB, free: 3.586 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck): time 0.001189/0.1274, allocations: 0.9827 MB / 0.6504 GB, free: 2.594 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.0005652/0.128, allocations: 341.6 kB / 0.6507 GB, free: 2.262 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 2.43e-05/0.128, allocations: 1.906 kB / 0.6507 GB, free: 2.262 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 1.217e-05/0.128, allocations: 0 / 0.6507 GB, free: 2.262 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 4.222e-05/0.1281, allocations: 7.984 kB / 0.6507 GB, free: 2.254 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.000358/0.1284, allocations: 67.78 kB / 0.6508 GB, free: 2.188 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 4.364e-05/0.1285, allocations: 14.47 kB / 0.6508 GB, free: 2.176 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 4.175e-05/0.1285, allocations: 4 kB / 0.6508 GB, free: 2.172 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 3.302e-05/0.1286, allocations: 11.94 kB / 0.6508 GB, free: 2.16 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 4.998e-05/0.1286, allocations: 3.984 kB / 0.6508 GB, free: 2.156 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 1.208e-05/0.1287, allocations: 4 kB / 0.6508 GB, free: 2.152 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0002697/0.1289, allocations: 179.7 kB / 0.651 GB, free: 1.977 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 1.077e-05/0.1289, allocations: 4.5 kB / 0.651 GB, free: 1.973 MB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 2.596e-05/0.129, allocations: 33.64 kB / 0.651 GB, free: 1.934 MB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0001213/0.1291, allocations: 52.47 kB / 0.6511 GB, free: 1.883 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 2.304e-06/0.1291, allocations: 0.5938 kB / 0.6511 GB, free: 1.883 MB / 446.1 MB Notification: Performance of FrontEnd: time 1.723e-06/0.1291, allocations: 0 / 0.6511 GB, free: 1.883 MB / 446.1 MB Notification: Performance of Transformations before backend: time 3.536e-06/0.1291, allocations: 0.5312 kB / 0.6511 GB, free: 1.883 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: 4 * Number of variables: 4 Notification: Performance of Generate backend data structure: time 0.0003391/0.1295, allocations: 344.2 kB / 0.6514 GB, free: 1.5 MB / 446.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.412e-05/0.1295, allocations: 9.125 kB / 0.6514 GB, free: 1.492 MB / 446.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 3.327e-05/0.1296, allocations: 3.984 kB / 0.6514 GB, free: 1.488 MB / 446.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.000111/0.1297, allocations: 171 kB / 0.6516 GB, free: 1.281 MB / 446.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.113e-05/0.1297, allocations: 5.5 kB / 0.6516 GB, free: 1.277 MB / 446.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 2.214e-05/0.1297, allocations: 4 kB / 0.6516 GB, free: 1.273 MB / 446.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 9.834e-05/0.1298, allocations: 37.69 kB / 0.6516 GB, free: 1.23 MB / 446.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 6.903e-06/0.1298, allocations: 0.75 kB / 0.6516 GB, free: 1.23 MB / 446.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.287e-05/0.1298, allocations: 8 kB / 0.6517 GB, free: 1.223 MB / 446.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.622e-06/0.1299, allocations: 4.578 kB / 0.6517 GB, free: 1.219 MB / 446.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 3.653e-05/0.1299, allocations: 13.44 kB / 0.6517 GB, free: 1.207 MB / 446.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0001539/0.1301, allocations: 157.6 kB / 0.6518 GB, free: 1.004 MB / 446.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0001572/0.1302, allocations: 43.27 kB / 0.6519 GB, free: 0.9531 MB / 446.1 MB Notification: Performance of preOpt evalFunc (simulation): time 1.936e-05/0.1303, allocations: 8.828 kB / 0.6519 GB, free: 0.9453 MB / 446.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.214e-05/0.1303, allocations: 31.12 kB / 0.6519 GB, free: 0.9062 MB / 446.1 MB Notification: Performance of pre-optimization done (n=4): time 1.162e-06/0.1303, allocations: 1.031 kB / 0.6519 GB, free: 0.9062 MB / 446.1 MB Notification: Performance of matching and sorting (n=6): time 0.0005678/0.1309, allocations: 303.9 kB / 0.6522 GB, free: 0.5586 MB / 446.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.681e-05/0.1309, allocations: 55.34 kB / 0.6522 GB, free: 0.4922 MB / 446.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 6.158e-05/0.131, allocations: 97.84 kB / 0.6523 GB, free: 396 kB / 446.1 MB Notification: Performance of collectPreVariables (initialization): time 1.423e-05/0.131, allocations: 30.42 kB / 0.6524 GB, free: 360 kB / 446.1 MB Notification: Performance of collectInitialEqns (initialization): time 2.849e-05/0.131, allocations: 84.14 kB / 0.6524 GB, free: 272 kB / 446.1 MB Notification: Performance of collectInitialBindings (initialization): time 2.56e-05/0.1311, allocations: 20.91 kB / 0.6525 GB, free: 252 kB / 446.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 2.806e-06/0.1311, allocations: 0 / 0.6525 GB, free: 252 kB / 446.1 MB Notification: Performance of setup shared object (initialization): time 0.0001043/0.1312, allocations: 318.8 kB / 0.6528 GB, free: 15.93 MB / 462.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 2.249e-05/0.1312, allocations: 8.656 kB / 0.6528 GB, free: 15.92 MB / 462.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 1.912e-05/0.1312, allocations: 12.72 kB / 0.6528 GB, free: 15.91 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 2.841e-05/0.1313, allocations: 12 kB / 0.6528 GB, free: 15.89 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.844e-06/0.1313, allocations: 8.766 kB / 0.6528 GB, free: 15.89 MB / 462.1 MB Notification: Performance of matching and sorting (n=7) (initialization): time 8.583e-05/0.1314, allocations: 65.53 kB / 0.6529 GB, free: 15.82 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.674e-05/0.1314, allocations: 8.594 kB / 0.6529 GB, free: 15.81 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.268e-06/0.1314, allocations: 0 / 0.6529 GB, free: 15.81 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.241e-05/0.1314, allocations: 1.969 kB / 0.6529 GB, free: 15.81 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 5.318e-05/0.1315, allocations: 19.92 kB / 0.6529 GB, free: 15.79 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.65e-06/0.1315, allocations: 0 / 0.6529 GB, free: 15.79 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 1.728e-05/0.1315, allocations: 4 kB / 0.6529 GB, free: 15.79 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.548e-06/0.1315, allocations: 0 / 0.6529 GB, free: 15.79 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 (7): * Single equations (assignments): 7 * 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 7.207e-05/0.1316, allocations: 115.3 kB / 0.653 GB, free: 15.66 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.668e-06/0.1316, allocations: 3.953 kB / 0.653 GB, free: 15.66 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001251/0.1318, allocations: 70.39 kB / 0.6531 GB, free: 15.59 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.713e-06/0.1318, allocations: 2.25 kB / 0.6531 GB, free: 15.59 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.278e-06/0.1318, allocations: 4 kB / 0.6531 GB, free: 15.58 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.857e-06/0.1318, allocations: 0 / 0.6531 GB, free: 15.58 MB / 462.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002878/0.1321, allocations: 315.4 kB / 0.6534 GB, free: 15.21 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.753e-06/0.1321, allocations: 0 / 0.6534 GB, free: 15.21 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 5.984e-05/0.1322, allocations: 17.64 kB / 0.6534 GB, free: 15.2 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 4.999e-06/0.1322, allocations: 4 kB / 0.6534 GB, free: 15.2 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.612e-06/0.1322, allocations: 0 / 0.6534 GB, free: 15.2 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.533e-06/0.1322, allocations: 0 / 0.6534 GB, free: 15.2 MB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.232e-06/0.1322, allocations: 0.8125 kB / 0.6534 GB, free: 15.2 MB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0001688/0.1324, allocations: 200.3 kB / 0.6536 GB, free: 14.98 MB / 462.1 MB Notification: Performance of postOpt removeConstants (simulation): time 4.154e-05/0.1324, allocations: 81.09 kB / 0.6537 GB, free: 14.88 MB / 462.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.416e-05/0.1324, allocations: 4.656 kB / 0.6537 GB, free: 14.88 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 6.482e-05/0.1325, allocations: 0.5156 kB / 0.6537 GB, free: 14.88 MB / 462.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 1.891e-05/0.1325, allocations: 10.45 kB / 0.6537 GB, free: 14.87 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.963e-06/0.1325, allocations: 4 kB / 0.6537 GB, free: 14.86 MB / 462.1 MB Notification: Performance of sorting global known variables: time 3.548e-05/0.1326, allocations: 83.27 kB / 0.6538 GB, free: 14.78 MB / 462.1 MB Notification: Performance of sort global known variables: time 1.9e-07/0.1326, allocations: 3.938 kB / 0.6538 GB, free: 14.78 MB / 462.1 MB Notification: Performance of remove unused functions: time 0.0002274/0.1328, allocations: 16 kB / 0.6538 GB, free: 14.76 MB / 462.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 1 (m_flow_comp) * 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 (6): * Single equations (assignments): 6 * 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 0.0001534/0.133, allocations: 129.2 kB / 0.6539 GB, free: 14.63 MB / 462.1 MB Notification: Performance of simCode: created initialization part: time 9.246e-05/0.1331, allocations: 28.22 kB / 0.6539 GB, free: 14.6 MB / 462.1 MB Notification: Performance of simCode: created event and clocks part: time 3.537e-06/0.1331, allocations: 3.938 kB / 0.654 GB, free: 14.6 MB / 462.1 MB Notification: Performance of simCode: created simulation system equations: time 2.85e-05/0.1331, allocations: 28.48 kB / 0.654 GB, free: 14.57 MB / 462.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.000138/0.1333, allocations: 8.891 kB / 0.654 GB, free: 14.56 MB / 462.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0003526/0.1336, allocations: 218.1 kB / 0.6542 GB, free: 14.32 MB / 462.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000201/0.1339, allocations: 0.6848 MB / 0.6549 GB, free: 13.61 MB / 462.1 MB Notification: Performance of simCode: alias equations: time 3.012e-05/0.1339, allocations: 11.98 kB / 0.6549 GB, free: 13.59 MB / 462.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 1.679e-05/0.1339, allocations: 7.438 kB / 0.6549 GB, free: 13.59 MB / 462.1 MB Notification: Performance of SimCode: time 3.11e-07/0.1339, allocations: 0 / 0.6549 GB, free: 13.59 MB / 462.1 MB Notification: Performance of Templates: time 0.002485/0.1364, allocations: 0.5994 MB / 0.6555 GB, free: 13.02 MB / 462.1 MB make -j1 -f BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.makefile Environment - environmentSimulation: (rm -f BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.sim & ./BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_dp_DerivativeCheck.pipe 2>&1) Environment - environmentSimulation: