Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.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: translateModel(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil,tolerance=1e-06,outputFormat="empty",numberOfIntervals=92,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil")
translateModel(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil,tolerance=1e-06,outputFormat="empty",numberOfIntervals=92,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0007593/0.0007594, allocations: 91.38 kB / 15.06 MB, free: 1.098 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0008571/0.0008573, allocations: 172.7 kB / 15.95 MB, free: 208 kB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.418/1.418, allocations: 205.4 MB / 222.1 MB, free: 5.66 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 1.641/1.641, allocations: 292.7 MB / 0.5499 GB, free: 14.57 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 0.0004714/0.0004715, allocations: 13.66 kB / 0.6738 GB, free: 26.2 MB / 0.5294 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.213/0.2135, allocations: 116.3 MB / 0.7873 GB, free: 11.89 MB / 0.6075 GB
Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil): time 0.001796/0.2153, allocations: 1.226 MB / 0.7885 GB, free: 10.67 MB / 0.6075 GB
Notification: Performance of NFInst.instExpressions: time 0.002193/0.2175, allocations: 1.449 MB / 0.7899 GB, free: 9.207 MB / 0.6075 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0003025/0.2179, allocations: 4 kB / 0.7899 GB, free: 9.203 MB / 0.6075 GB
Notification: Performance of NFTyping.typeComponents: time 0.0001774/0.2181, allocations: 27.67 kB / 0.79 GB, free: 9.176 MB / 0.6075 GB
Notification: Performance of NFTyping.typeBindings: time 0.0001402/0.2182, allocations: 35.7 kB / 0.79 GB, free: 9.141 MB / 0.6075 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0006202/0.2188, allocations: 173 kB / 0.7902 GB, free: 8.973 MB / 0.6075 GB
Notification: Performance of NFFlatten.flatten: time 0.0004961/0.2194, allocations: 368.2 kB / 0.7905 GB, free: 8.609 MB / 0.6075 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0002606/0.2196, allocations: 119.7 kB / 0.7906 GB, free: 8.488 MB / 0.6075 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0001766/0.2198, allocations: 99.5 kB / 0.7907 GB, free: 8.391 MB / 0.6075 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0001944/0.22, allocations: 111.3 kB / 0.7908 GB, free: 8.281 MB / 0.6075 GB
Notification: Performance of NFPackage.collectConstants: time 4.594e-05/0.2201, allocations: 12 kB / 0.7909 GB, free: 8.27 MB / 0.6075 GB
Notification: Performance of NFFlatten.collectFunctions: time 8.64e-05/0.2202, allocations: 23.98 kB / 0.7909 GB, free: 8.246 MB / 0.6075 GB
Notification: Performance of NFScalarize.scalarize: time 4.447e-05/0.2202, allocations: 39.78 kB / 0.7909 GB, free: 8.207 MB / 0.6075 GB
Notification: Performance of NFVerifyModel.verify: time 7.712e-05/0.2203, allocations: 69.58 kB / 0.791 GB, free: 8.133 MB / 0.6075 GB
Notification: Performance of NFConvertDAE.convert: time 0.0004247/0.2207, allocations: 411 kB / 0.7914 GB, free: 7.73 MB / 0.6075 GB
Notification: Performance of FrontEnd - DAE generated: time 4.549e-06/0.2207, allocations: 3.938 kB / 0.7914 GB, free: 7.727 MB / 0.6075 GB
Notification: Performance of FrontEnd: time 1.543e-06/0.2207, allocations: 0 / 0.7914 GB, free: 7.727 MB / 0.6075 GB
Notification: Performance of Transformations before backend: time 1.672e-05/0.2208, allocations: 0 / 0.7914 GB, free: 7.727 MB / 0.6075 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 54
 * Number of variables: 54
Notification: Performance of Generate backend data structure: time 0.001167/0.2219, allocations: 0.5861 MB / 0.7919 GB, free: 7.086 MB / 0.6075 GB
Notification: Performance of prepare preOptimizeDAE: time 4.573e-05/0.222, allocations: 12.02 kB / 0.792 GB, free: 7.074 MB / 0.6075 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001081/0.2221, allocations: 35.62 kB / 0.792 GB, free: 7.039 MB / 0.6075 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0005832/0.2227, allocations: 341.9 kB / 0.7923 GB, free: 6.664 MB / 0.6075 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.428e-05/0.2227, allocations: 16.44 kB / 0.7923 GB, free: 6.648 MB / 0.6075 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 5.424e-05/0.2228, allocations: 28 kB / 0.7924 GB, free: 6.621 MB / 0.6075 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005593/0.2234, allocations: 261.8 kB / 0.7926 GB, free: 6.352 MB / 0.6075 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.067e-05/0.2234, allocations: 0 / 0.7926 GB, free: 6.352 MB / 0.6075 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.414e-05/0.2234, allocations: 12 kB / 0.7926 GB, free: 6.34 MB / 0.6075 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.414e-06/0.2234, allocations: 4 kB / 0.7926 GB, free: 6.336 MB / 0.6075 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004593/0.2239, allocations: 193.6 kB / 0.7928 GB, free: 6.148 MB / 0.6075 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001439/0.2254, allocations: 0.9605 MB / 0.7937 GB, free: 5.117 MB / 0.6075 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0004409/0.2258, allocations: 178.6 kB / 0.7939 GB, free: 4.934 MB / 0.6075 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001837/0.226, allocations: 80.75 kB / 0.794 GB, free: 4.852 MB / 0.6075 GB
Notification: Performance of preOpt evalFunc (simulation): time 2.511e-05/0.226, allocations: 4 kB / 0.794 GB, free: 4.848 MB / 0.6075 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003121/0.2264, allocations: 127.3 kB / 0.7941 GB, free: 4.711 MB / 0.6075 GB
Notification: Performance of pre-optimization done (n=14): time 1.453e-06/0.2264, allocations: 0 / 0.7941 GB, free: 4.711 MB / 0.6075 GB
Notification: Performance of matching and sorting (n=14): time 0.0006551/0.227, allocations: 267.2 kB / 0.7944 GB, free: 4.445 MB / 0.6075 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 6.61e-05/0.2271, allocations: 81.11 kB / 0.7945 GB, free: 4.348 MB / 0.6075 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003275/0.2274, allocations: 290.8 kB / 0.7947 GB, free: 4.055 MB / 0.6075 GB
Notification: Performance of collectPreVariables (initialization): time 3.199e-05/0.2275, allocations: 29.7 kB / 0.7948 GB, free: 4.02 MB / 0.6075 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0001388/0.2276, allocations: 188.1 kB / 0.7949 GB, free: 3.832 MB / 0.6075 GB
Notification: Performance of collectInitialBindings (initialization): time 3.619e-05/0.2277, allocations: 43.45 kB / 0.795 GB, free: 3.789 MB / 0.6075 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 1.641e-05/0.2277, allocations: 0 / 0.795 GB, free: 3.789 MB / 0.6075 GB
Notification: Performance of setup shared object (initialization): time 0.0001296/0.2278, allocations: 342.8 kB / 0.7953 GB, free: 3.445 MB / 0.6075 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002449/0.2281, allocations: 96.12 kB / 0.7954 GB, free: 3.352 MB / 0.6075 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002811/0.2284, allocations: 160 kB / 0.7956 GB, free: 3.168 MB / 0.6075 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0002554/0.2286, allocations: 129.6 kB / 0.7957 GB, free: 3.035 MB / 0.6075 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.807e-06/0.2286, allocations: 0 / 0.7957 GB, free: 3.035 MB / 0.6075 GB
Notification: Performance of matching and sorting (n=22) (initialization): time 0.0006606/0.2293, allocations: 329.9 kB / 0.796 GB, free: 2.703 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0001386/0.2295, allocations: 167.8 kB / 0.7961 GB, free: 2.508 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.736e-06/0.2295, allocations: 8 kB / 0.7962 GB, free: 2.5 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.897e-05/0.2295, allocations: 0 / 0.7962 GB, free: 2.5 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001675/0.2297, allocations: 43.91 kB / 0.7962 GB, free: 2.457 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.322e-05/0.2297, allocations: 7.891 kB / 0.7962 GB, free: 2.449 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003043/0.23, allocations: 83.72 kB / 0.7963 GB, free: 2.367 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.888e-05/0.2301, allocations: 8 kB / 0.7963 GB, free: 2.359 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 9.047e-06/0.2301, allocations: 4 kB / 0.7963 GB, free: 2.355 MB / 0.6075 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0004976/0.2306, allocations: 261.4 kB / 0.7965 GB, free: 2.094 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.617e-06/0.2306, allocations: 4 kB / 0.7966 GB, free: 2.09 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 6.302e-06/0.2306, allocations: 4 kB / 0.7966 GB, free: 2.086 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000135/0.2307, allocations: 31.97 kB / 0.7966 GB, free: 2.055 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.11e-06/0.2308, allocations: 0 / 0.7966 GB, free: 2.055 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002569/0.231, allocations: 71.92 kB / 0.7967 GB, free: 1.984 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.198e-05/0.231, allocations: 8 kB / 0.7967 GB, free: 1.977 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 7
 * Number of states: 0 ()
 * Number of discrete variables: 8 ($whenCondition1,$whenCondition2,cooCoi.conInt.y,cooCoi.intEqu.y,cooCoi.and2.y,$PRE.zonSta.booPul.y,zonSta.booPul.y,reaToInt.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (20):
 * Single equations (assignments): 19
 * 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 0.0002346/0.2313, allocations: 236.2 kB / 0.7969 GB, free: 1.738 MB / 0.6075 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 4.069e-05/0.2313, allocations: 31.59 kB / 0.7969 GB, free: 1.707 MB / 0.6075 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 5.919e-05/0.2314, allocations: 21.92 kB / 0.7969 GB, free: 1.684 MB / 0.6075 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.246e-06/0.2314, allocations: 7.984 kB / 0.7969 GB, free: 1.676 MB / 0.6075 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 6.172e-06/0.2314, allocations: 0 / 0.7969 GB, free: 1.676 MB / 0.6075 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.038e-06/0.2314, allocations: 0 / 0.7969 GB, free: 1.676 MB / 0.6075 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0003365/0.2318, allocations: 321.4 kB / 0.7973 GB, free: 1.312 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.217e-06/0.2318, allocations: 0 / 0.7973 GB, free: 1.312 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001297/0.2319, allocations: 31.91 kB / 0.7973 GB, free: 1.281 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (simulation): time 3.447e-06/0.2319, allocations: 4 kB / 0.7973 GB, free: 1.277 MB / 0.6075 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.644e-05/0.232, allocations: 4 kB / 0.7973 GB, free: 1.273 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.844e-06/0.232, allocations: 0 / 0.7973 GB, free: 1.273 MB / 0.6075 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.683e-06/0.232, allocations: 0 / 0.7973 GB, free: 1.273 MB / 0.6075 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004277/0.2324, allocations: 226 kB / 0.7975 GB, free: 1.035 MB / 0.6075 GB
Notification: Performance of postOpt removeConstants (simulation): time 7.327e-05/0.2325, allocations: 112.7 kB / 0.7976 GB, free: 0.9062 MB / 0.6075 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.859e-05/0.2325, allocations: 0 / 0.7976 GB, free: 0.9062 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001144/0.2326, allocations: 19.98 kB / 0.7976 GB, free: 0.8867 MB / 0.6075 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 6.325e-05/0.2327, allocations: 19.97 kB / 0.7977 GB, free: 0.8672 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.35e-05/0.2327, allocations: 8 kB / 0.7977 GB, free: 0.8594 MB / 0.6075 GB
Notification: Performance of sorting global known variables: time 0.0001903/0.2329, allocations: 201.9 kB / 0.7979 GB, free: 0.6602 MB / 0.6075 GB
Notification: Performance of sort global known variables: time 9.548e-06/0.2329, allocations: 0 / 0.7979 GB, free: 0.6602 MB / 0.6075 GB
Notification: Performance of remove unused functions: time 0.0003934/0.2333, allocations: 99.62 kB / 0.7979 GB, free: 0.5625 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 0 ()
 * Number of discrete variables: 6 ($whenCondition1,$whenCondition2,cooCoi.intEqu.y,cooCoi.and2.y,zonSta.booPul.y,reaToInt.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (14):
 * Single equations (assignments): 13
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 1
 * 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 0.0001484/0.2335, allocations: 103.2 kB / 0.798 GB, free: 464 kB / 0.6075 GB
Notification: Performance of simCode: created initialization part: time 0.0008451/0.2343, allocations: 477.8 kB / 0.7985 GB, free: 15.96 MB / 0.6231 GB
Notification: Performance of simCode: created event and clocks part: time 2.795e-06/0.2344, allocations: 0 / 0.7985 GB, free: 15.96 MB / 0.6231 GB
Notification: Performance of simCode: created simulation system equations: time 0.0001966/0.2346, allocations: 83.89 kB / 0.7986 GB, free: 15.88 MB / 0.6231 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003947/0.235, allocations: 57.17 kB / 0.7986 GB, free: 15.82 MB / 0.6231 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0009934/0.236, allocations: 0.5209 MB / 0.7991 GB, free: 15.28 MB / 0.6231 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003555/0.2363, allocations: 0.756 MB / 0.7999 GB, free: 14.5 MB / 0.6231 GB
Notification: Performance of simCode: alias equations: time 0.0001615/0.2365, allocations: 30.28 kB / 0.7999 GB, free: 14.46 MB / 0.6231 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 5.734e-05/0.2366, allocations: 27.44 kB / 0.7999 GB, free: 14.44 MB / 0.6231 GB
Notification: Performance of SimCode: time 7.42e-07/0.2366, allocations: 0 / 0.7999 GB, free: 14.44 MB / 0.6231 GB
Notification: Performance of Templates: time 0.007541/0.2441, allocations: 3.516 MB / 0.8034 GB, free: 10.98 MB / 0.6231 GB
make -j1 -f Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.makefile
Environment - environmentSimulation:
(rm -f Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.pipe ; mkfifo Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.pipe ; head -c 1048576 < Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.pipe >> ../files/Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.sim & ./Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Validation.CoolingCoil.pipe 2>&1)
Environment - environmentSimulation: