Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.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.Interfaces.Examples.ReverseFlowHumidifier,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier") translateModel(BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00107/0.00107, allocations: 109.3 kB / 15.7 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001144/0.001144, allocations: 194.9 kB / 16.63 MB, free: 6.609 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.387/1.387, allocations: 222.9 MB / 240.3 MB, free: 4.344 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002152/0.002152, allocations: 283 kB / 290.8 MB, free: 1.934 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.9563/0.9563, allocations: 169.3 MB / 0.4983 GB, free: 13.84 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.003248/0.003248, allocations: 103.8 kB / 0.6814 GB, free: 15.52 MB / 494.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.192/0.1953, allocations: 86.97 MB / 0.7663 GB, free: 8.473 MB / 0.5606 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier): time 0.6891/0.8844, allocations: 274.6 MB / 1.035 GB, free: 15.8 MB / 0.795 GB Notification: Performance of NFInst.instExpressions: time 0.02355/0.908, allocations: 17.36 MB / 1.051 GB, free: 14.39 MB / 0.8106 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002943/0.911, allocations: 67.62 kB / 1.052 GB, free: 14.33 MB / 0.8106 GB Notification: Performance of NFTyping.typeComponents: time 0.003774/0.9149, allocations: 1.161 MB / 1.053 GB, free: 13.16 MB / 0.8106 GB Notification: Performance of NFTyping.typeBindings: time 0.009253/0.9242, allocations: 3.105 MB / 1.056 GB, free: 10.04 MB / 0.8106 GB Notification: Performance of NFTyping.typeClassSections: time 0.005868/0.9301, allocations: 2.212 MB / 1.058 GB, free: 7.836 MB / 0.8106 GB Notification: Performance of NFFlatten.flatten: time 0.006541/0.9366, allocations: 4.846 MB / 1.063 GB, free: 2.984 MB / 0.8106 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002824/0.9395, allocations: 1.766 MB / 1.064 GB, free: 1.188 MB / 0.8106 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005833/0.9453, allocations: 2.409 MB / 1.067 GB, free: 14.79 MB / 0.8262 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002999/0.9483, allocations: 1.538 MB / 1.068 GB, free: 13.25 MB / 0.8262 GB Notification: Performance of NFPackage.collectConstants: time 0.0006022/0.9489, allocations: 192 kB / 1.068 GB, free: 13.06 MB / 0.8262 GB Notification: Performance of NFFlatten.collectFunctions: time 0.006033/0.955, allocations: 3.013 MB / 1.071 GB, free: 10.04 MB / 0.8262 GB Notification: Performance of NFScalarize.scalarize: time 0.001116/0.9561, allocations: 0.7246 MB / 1.072 GB, free: 9.316 MB / 0.8262 GB Notification: Performance of NFVerifyModel.verify: time 0.002264/0.9584, allocations: 1.12 MB / 1.073 GB, free: 8.191 MB / 0.8262 GB Notification: Performance of NFConvertDAE.convert: time 0.006615/0.965, allocations: 3.827 MB / 1.077 GB, free: 4.355 MB / 0.8262 GB Notification: Performance of FrontEnd - DAE generated: time 4.368e-06/0.965, allocations: 0 / 1.077 GB, free: 4.355 MB / 0.8262 GB Notification: Performance of FrontEnd: time 4.709e-06/0.9651, allocations: 0 / 1.077 GB, free: 4.355 MB / 0.8262 GB Notification: Performance of Transformations before backend: time 9.64e-05/0.9652, allocations: 7.938 kB / 1.077 GB, free: 4.348 MB / 0.8262 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 324 * Number of variables: 324 Notification: Performance of Generate backend data structure: time 0.005135/0.9703, allocations: 2.419 MB / 1.079 GB, free: 1.859 MB / 0.8262 GB Notification: Performance of prepare preOptimizeDAE: time 3.933e-05/0.9704, allocations: 11.97 kB / 1.079 GB, free: 1.848 MB / 0.8262 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004713/0.9751, allocations: 0.6494 MB / 1.08 GB, free: 1.195 MB / 0.8262 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002688/0.9778, allocations: 1.4 MB / 1.081 GB, free: 15.74 MB / 0.8419 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.738e-05/0.9779, allocations: 102.5 kB / 1.081 GB, free: 15.64 MB / 0.8419 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003132/0.9782, allocations: 136 kB / 1.081 GB, free: 15.5 MB / 0.8419 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003093/0.9813, allocations: 1.561 MB / 1.083 GB, free: 13.88 MB / 0.8419 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.35e-05/0.9814, allocations: 7.938 kB / 1.083 GB, free: 13.87 MB / 0.8419 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001735/0.9816, allocations: 64 kB / 1.083 GB, free: 13.8 MB / 0.8419 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.053e-05/0.9816, allocations: 54.38 kB / 1.083 GB, free: 13.75 MB / 0.8419 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002332/0.984, allocations: 1.266 MB / 1.084 GB, free: 12.48 MB / 0.8419 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 0.009253/0.9932, allocations: 7.202 MB / 1.091 GB, free: 4.707 MB / 0.8419 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001123/0.9944, allocations: 0.6495 MB / 1.092 GB, free: 4.047 MB / 0.8419 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005304/0.9949, allocations: 372.3 kB / 1.092 GB, free: 3.684 MB / 0.8419 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001935/0.9951, allocations: 113.6 kB / 1.092 GB, free: 3.555 MB / 0.8419 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.372e-05/0.9952, allocations: 39.12 kB / 1.092 GB, free: 3.508 MB / 0.8419 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.000609/0.9958, allocations: 103 kB / 1.093 GB, free: 3.406 MB / 0.8419 GB Notification: Performance of pre-optimization done (n=67): time 4.018e-06/0.9958, allocations: 0 / 1.093 GB, free: 3.406 MB / 0.8419 GB Notification: Performance of matching and sorting (n=67): time 0.002015/0.9978, allocations: 1.028 MB / 1.094 GB, free: 2.375 MB / 0.8419 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.829e-05/0.9979, allocations: 55.97 kB / 1.094 GB, free: 2.309 MB / 0.8419 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002167/1, allocations: 1.339 MB / 1.095 GB, free: 0.9609 MB / 0.8419 GB Notification: Performance of collectPreVariables (initialization): time 9.728e-05/1, allocations: 45.7 kB / 1.095 GB, free: 0.9102 MB / 0.8419 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005652/1.001, allocations: 0.7659 MB / 1.096 GB, free: 140 kB / 0.8419 GB Notification: Performance of collectInitialBindings (initialization): time 0.3762/1.377, allocations: 238.8 kB / 1.096 GB, free: 293.6 MB / 0.8419 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0005832/1.378, allocations: 203.6 kB / 1.096 GB, free: 293.6 MB / 0.8419 GB Notification: Performance of setup shared object (initialization): time 0.0001179/1.378, allocations: 349.8 kB / 1.096 GB, free: 293.3 MB / 0.8419 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007966/1.379, allocations: 356 kB / 1.097 GB, free: 293.3 MB / 0.8419 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009035/1.379, allocations: 0.6804 MB / 1.097 GB, free: 292.9 MB / 0.8419 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00133/1.381, allocations: 0.9519 MB / 1.098 GB, free: 292.7 MB / 0.8419 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.277e-06/1.381, allocations: 1.844 kB / 1.098 GB, free: 292.7 MB / 0.8419 GB Notification: Performance of matching and sorting (n=123) (initialization): time 0.001985/1.383, allocations: 1.152 MB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of prepare postOptimizeDAE: time 2.281e-05/1.383, allocations: 7.469 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.388e-05/1.383, allocations: 6.875 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.731e-05/1.383, allocations: 15.12 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008922/1.384, allocations: 213.5 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.125e-05/1.384, allocations: 13.3 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00127/1.385, allocations: 53.92 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.744e-05/1.385, allocations: 41.88 kB / 1.1 GB, free: 292.3 MB / 0.8419 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001073/1.386, allocations: 0.6873 MB / 1.101 GB, free: 292 MB / 0.8419 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0007181/1.387, allocations: 0.6818 MB / 1.101 GB, free: 291.4 MB / 0.8419 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001153/1.388, allocations: 0.952 MB / 1.102 GB, free: 290.8 MB / 0.8419 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.019e-06/1.388, allocations: 2.719 kB / 1.102 GB, free: 290.8 MB / 0.8419 GB Notification: Performance of matching and sorting (n=123) (initialization_lambda0): time 0.001743/1.39, allocations: 1.147 MB / 1.103 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of prepare postOptimizeDAE: time 1.409e-05/1.39, allocations: 9.719 kB / 1.103 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.117e-06/1.39, allocations: 7.797 kB / 1.103 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.194e-05/1.39, allocations: 12.12 kB / 1.103 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008767/1.391, allocations: 211.4 kB / 1.104 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.952e-05/1.391, allocations: 17.03 kB / 1.104 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001265/1.392, allocations: 65.16 kB / 1.104 GB, free: 290.4 MB / 0.8419 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.787e-05/1.392, allocations: 42.08 kB / 1.104 GB, free: 290.4 MB / 0.8419 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 30 * 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 (121): * Single equations (assignments): 119 * Array equations: 2 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0002641/1.393, allocations: 241.5 kB / 1.104 GB, free: 290.2 MB / 0.8419 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002145/1.393, allocations: 157.6 kB / 1.104 GB, free: 290.1 MB / 0.8419 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001337/1.394, allocations: 0.8234 MB / 1.105 GB, free: 289.7 MB / 0.8419 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.5e-06/1.394, allocations: 6.781 kB / 1.105 GB, free: 289.7 MB / 0.8419 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.893e-06/1.394, allocations: 4.594 kB / 1.105 GB, free: 289.7 MB / 0.8419 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0008076/1.395, allocations: 0.7885 MB / 1.106 GB, free: 289.2 MB / 0.8419 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002771/1.398, allocations: 2.302 MB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.807e-06/1.398, allocations: 2.938 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007886/1.399, allocations: 163 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.524e-06/1.399, allocations: 9.188 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.71e-05/1.399, allocations: 21.78 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 5.36e-06/1.399, allocations: 3.141 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.715e-06/1.399, allocations: 6.25 kB / 1.108 GB, free: 288.1 MB / 0.8419 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001502/1.4, allocations: 1.263 MB / 1.109 GB, free: 287.4 MB / 0.8419 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004311/1.401, allocations: 313.2 kB / 1.11 GB, free: 287.2 MB / 0.8419 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000161/1.401, allocations: 19.16 kB / 1.11 GB, free: 287.2 MB / 0.8419 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008633/1.402, allocations: 39.22 kB / 1.11 GB, free: 287.2 MB / 0.8419 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.618e-05/1.402, allocations: 44.25 kB / 1.11 GB, free: 287.2 MB / 0.8419 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.786e-05/1.402, allocations: 34.98 kB / 1.11 GB, free: 287.2 MB / 0.8419 GB Notification: Performance of sorting global known variables: time 0.001173/1.403, allocations: 0.9139 MB / 1.111 GB, free: 286.8 MB / 0.8419 GB Notification: Performance of sort global known variables: time 1.3e-07/1.403, allocations: 0 / 1.111 GB, free: 286.8 MB / 0.8419 GB Notification: Performance of remove unused functions: time 0.001918/1.405, allocations: 0.8369 MB / 1.111 GB, free: 286.7 MB / 0.8419 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 6 (humBac.vol.dynBal.medium.Xi[1],humBac.vol.dynBal.U,humBac.vol.dynBal.m,humFor.vol.dynBal.medium.Xi[1],humFor.vol.dynBal.U,humFor.vol.dynBal.m) * 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 (71): * Single equations (assignments): 71 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0005318/1.405, allocations: 255.8 kB / 1.112 GB, free: 286.6 MB / 0.8419 GB Notification: Performance of simCode: created initialization part: time 0.002211/1.408, allocations: 1.335 MB / 1.113 GB, free: 286.1 MB / 0.8419 GB Notification: Performance of simCode: created event and clocks part: time 4.238e-06/1.408, allocations: 1.094 kB / 1.113 GB, free: 286.1 MB / 0.8419 GB Notification: Performance of simCode: created simulation system equations: time 0.0005349/1.408, allocations: 357.9 kB / 1.113 GB, free: 286 MB / 0.8419 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003496/1.412, allocations: 0.8316 MB / 1.114 GB, free: 285.8 MB / 0.8419 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004741/1.416, allocations: 2.891 MB / 1.117 GB, free: 284.4 MB / 0.8419 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009528/1.417, allocations: 1.347 MB / 1.118 GB, free: 283.6 MB / 0.8419 GB Notification: Performance of simCode: alias equations: time 0.001543/1.419, allocations: 422.2 kB / 1.119 GB, free: 283.6 MB / 0.8419 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003009/1.419, allocations: 115.8 kB / 1.119 GB, free: 283.6 MB / 0.8419 GB Notification: Performance of SimCode: time 7.61e-07/1.419, allocations: 0 / 1.119 GB, free: 283.6 MB / 0.8419 GB Notification: Performance of Templates: time 0.0543/1.474, allocations: 29.04 MB / 1.147 GB, free: 273.6 MB / 0.8419 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.makefile (rm -f BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.sim & ./BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe 2>&1)