Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo", uses=false) Using package ThermoSysPro with version 4.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo) Running command: translateModel(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases") translateModel(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo): time 0.7444/0.7444, allocations: 150.9 MB / 167 MB, free: 14.62 MB / 142.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003216/0.0003217, allocations: 11.98 kB / 205.2 MB, free: 9.852 MB / 174.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1233/0.1236, allocations: 31.33 MB / 236.5 MB, free: 5.426 MB / 190.1 MB Notification: Automatically loaded package Complex 4.0.0 due to uses annotation from Modelica. Notification: Automatically loaded package ModelicaServices 4.0.0 due to uses annotation from Modelica. Notification: Automatically loaded package Modelica 4.0.0 due to usage. Notification: Performance of NFInst.instantiate(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases): time 1.443/1.567, allocations: 295.3 MB / 0.5194 GB, free: 12.77 MB / 414.1 MB Notification: Performance of NFInst.instExpressions: time 0.1502/1.717, allocations: 167.1 MB / 0.6826 GB, free: 5.301 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002373/1.717, allocations: 4 kB / 0.6826 GB, free: 5.297 MB / 0.5606 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/WaterSteam/BoundaryConditions/Sink.mo:17:3-19:16:writable] Warning: Connector C is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:50:3-51:83:writable] Warning: Connector Cws2 is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:52:3-54:16:writable] Warning: Connector Cws1 is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:55:3-56:83:writable] Warning: Connector Cfg1 is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:57:3-59:16:writable] Warning: Connector Cfg2 is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/WaterSteam/BoundaryConditions/SourcePQ.mo:29:3-30:52:writable] Warning: Connector C is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/FlueGases/BoundaryConditions/SourcePQ.mo:18:3-19:83:writable] Warning: Connector C is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/FlueGases/BoundaryConditions/Sink.mo:15:3-17:16:writable] Warning: Connector C is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). Notification: Performance of NFTyping.typeComponents: time 0.0004076/1.718, allocations: 128.1 kB / 0.6827 GB, free: 5.172 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.0003273/1.718, allocations: 146.7 kB / 0.6829 GB, free: 5.027 MB / 0.5606 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:783:9-783:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:850:9-850:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:1088:9-1088:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. Notification: Performance of NFTyping.typeClassSections: time 0.01331/1.731, allocations: 6.09 MB / 0.6888 GB, free: 14.94 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.0005882/1.732, allocations: 0.5338 MB / 0.6893 GB, free: 14.41 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0002921/1.732, allocations: 232.8 kB / 0.6895 GB, free: 14.17 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002431/1.732, allocations: 219.1 kB / 0.6898 GB, free: 13.96 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002228/1.733, allocations: 219 kB / 0.69 GB, free: 13.74 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 5.003e-05/1.733, allocations: 40 kB / 0.69 GB, free: 13.7 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01852/1.751, allocations: 12.66 MB / 0.7024 GB, free: 1.031 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0001001/1.751, allocations: 95.69 kB / 0.7025 GB, free: 0.9375 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0002517/1.752, allocations: 238.8 kB / 0.7027 GB, free: 0.7031 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.2412/1.993, allocations: 5.961 MB / 0.7085 GB, free: 14.37 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 4.779e-06/1.993, allocations: 0 / 0.7085 GB, free: 14.37 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.363e-06/1.993, allocations: 2.031 kB / 0.7085 GB, free: 14.37 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 8.576e-06/1.993, allocations: 0.5938 kB / 0.7085 GB, free: 14.37 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 136 * Number of variables: 136 Notification: Performance of Generate backend data structure: time 0.003/1.996, allocations: 1.193 MB / 0.7097 GB, free: 13.69 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.227e-05/1.996, allocations: 13.38 kB / 0.7097 GB, free: 13.69 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 8.28e-05/1.996, allocations: 49.56 kB / 0.7097 GB, free: 13.66 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002053/1.996, allocations: 277.3 kB / 0.71 GB, free: 13.44 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.861e-05/1.996, allocations: 33 kB / 0.71 GB, free: 13.44 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.452e-05/1.996, allocations: 42.81 kB / 0.7101 GB, free: 13.44 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005937/1.997, allocations: 0.5201 MB / 0.7106 GB, free: 13.31 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.353e-05/1.997, allocations: 3.969 kB / 0.7106 GB, free: 13.31 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.249e-05/1.997, allocations: 21.44 kB / 0.7106 GB, free: 13.31 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.862e-05/1.997, allocations: 18.61 kB / 0.7106 GB, free: 13.31 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005267/1.997, allocations: 344.2 kB / 0.7109 GB, free: 13.31 MB / 0.5762 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 0.001803/1.999, allocations: 2.733 MB / 0.7136 GB, free: 11.33 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0002296/1.999, allocations: 165.5 kB / 0.7138 GB, free: 11.3 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001248/2, allocations: 107.5 kB / 0.7139 GB, free: 11.3 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.06483/2.064, allocations: 33.26 MB / 0.7464 GB, free: 9.871 MB / 0.5919 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.711e-05/2.065, allocations: 41.88 kB / 0.7464 GB, free: 9.832 MB / 0.5919 GB Notification: Performance of pre-optimization done (n=40): time 2.174e-06/2.065, allocations: 0 / 0.7464 GB, free: 9.832 MB / 0.5919 GB Notification: Performance of matching and sorting (n=40): time 0.001829/2.066, allocations: 0.7142 MB / 0.7471 GB, free: 9.555 MB / 0.5919 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.84e-05/2.066, allocations: 57.19 kB / 0.7471 GB, free: 9.488 MB / 0.5919 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00035/2.067, allocations: 401.1 kB / 0.7475 GB, free: 9.371 MB / 0.5919 GB Notification: Performance of collectPreVariables (initialization): time 1.793e-05/2.067, allocations: 30.61 kB / 0.7476 GB, free: 9.34 MB / 0.5919 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001025/2.067, allocations: 207.2 kB / 0.7478 GB, free: 9.219 MB / 0.5919 GB Notification: Performance of collectInitialBindings (initialization): time 5.434e-05/2.067, allocations: 134 kB / 0.7479 GB, free: 9.133 MB / 0.5919 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.127e-05/2.067, allocations: 70.78 kB / 0.748 GB, free: 9.117 MB / 0.5919 GB Notification: Performance of setup shared object (initialization): time 0.0001007/2.067, allocations: 348.3 kB / 0.7483 GB, free: 8.805 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001385/2.067, allocations: 88.38 kB / 0.7484 GB, free: 8.801 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001589/2.067, allocations: 168.9 kB / 0.7485 GB, free: 8.715 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.000292/2.068, allocations: 274.5 kB / 0.7488 GB, free: 8.613 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.286e-06/2.068, allocations: 3.938 kB / 0.7488 GB, free: 8.609 MB / 0.5919 GB Notification: Performance of matching and sorting (n=53) (initialization): time 0.0008534/2.069, allocations: 477.4 kB / 0.7492 GB, free: 8.527 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.42e-05/2.069, allocations: 7.312 kB / 0.7493 GB, free: 8.527 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.003e-06/2.069, allocations: 3.531 kB / 0.7493 GB, free: 8.527 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007693/2.069, allocations: 295.3 kB / 0.7495 GB, free: 8.508 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000171/2.07, allocations: 45.3 kB / 0.7496 GB, free: 8.5 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009936/2.071, allocations: 1.828 MB / 0.7514 GB, free: 6.863 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002066/2.071, allocations: 55 kB / 0.7514 GB, free: 6.828 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.983e-05/2.071, allocations: 10.72 kB / 0.7514 GB, free: 6.828 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 8 (Puits_Fumees.C.a,Source_Fumees.C.b,source_Eau.C.b,EchangeurEfficacite.Cfg2.b,EchangeurEfficacite.Cfg1.a,EchangeurEfficacite.Cws1.a,EchangeurEfficacite.Cws2.b,puits_Eau.C.a) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (21): * Single equations (assignments): 17 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,1), (1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0001375/2.071, allocations: 158 kB / 0.7516 GB, free: 6.711 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 5.468e-05/2.071, allocations: 41.09 kB / 0.7516 GB, free: 6.691 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.000912/2.072, allocations: 0.7404 MB / 0.7523 GB, free: 6.578 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.000744/2.073, allocations: 0.5551 MB / 0.7529 GB, free: 6.488 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.45e-06/2.073, allocations: 4.5 kB / 0.7529 GB, free: 6.484 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.22e-06/2.073, allocations: 1.547 kB / 0.7529 GB, free: 6.484 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001537/2.074, allocations: 1.371 MB / 0.7542 GB, free: 6.078 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.025e-06/2.074, allocations: 64 / 0.7542 GB, free: 6.078 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001994/2.075, allocations: 72.28 kB / 0.7543 GB, free: 6.074 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003845/2.075, allocations: 206.9 kB / 0.7545 GB, free: 6.055 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.642e-05/2.075, allocations: 9.25 kB / 0.7545 GB, free: 6.055 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000924/2.076, allocations: 1.856 MB / 0.7563 GB, free: 4.422 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.373e-06/2.076, allocations: 0 / 0.7563 GB, free: 4.422 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0007947/2.077, allocations: 0.6724 MB / 0.757 GB, free: 4.219 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 8.289e-05/2.077, allocations: 138.5 kB / 0.7571 GB, free: 4.09 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.566e-05/2.077, allocations: 7.031 kB / 0.7571 GB, free: 4.086 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000151/2.077, allocations: 13.06 kB / 0.7571 GB, free: 4.086 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.83e-05/2.077, allocations: 25.95 kB / 0.7572 GB, free: 4.086 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.391e-05/2.077, allocations: 16.69 kB / 0.7572 GB, free: 4.082 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.0002254/2.077, allocations: 288.6 kB / 0.7574 GB, free: 3.996 MB / 0.5919 GB Notification: Performance of sort global known variables: time 7.82e-07/2.077, allocations: 0 / 0.7574 GB, free: 3.996 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.002413/2.08, allocations: 0.8456 MB / 0.7583 GB, free: 3.906 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * 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 simulation (38): * Single equations (assignments): 34 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,1), (1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.003061/2.083, allocations: 1.112 MB / 0.7594 GB, free: 3.652 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.0009929/2.084, allocations: 0.503 MB / 0.7598 GB, free: 3.508 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 2.695e-06/2.084, allocations: 0.625 kB / 0.7598 GB, free: 3.508 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.0004303/2.084, allocations: 247.3 kB / 0.7601 GB, free: 3.5 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0009548/2.085, allocations: 185 kB / 0.7603 GB, free: 3.469 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001368/2.087, allocations: 0.9408 MB / 0.7612 GB, free: 3.047 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003602/2.087, allocations: 0.8634 MB / 0.762 GB, free: 2.34 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 6.458e-05/2.087, allocations: 37.31 kB / 0.7621 GB, free: 2.332 MB / 0.5919 GB Notification: Performance of SimCode: time 2.21e-07/2.087, allocations: 0 / 0.7621 GB, free: 2.332 MB / 0.5919 GB Notification: Performance of Templates: time 0.02724/2.114, allocations: 26.47 MB / 0.7879 GB, free: 68 kB / 0.6075 GB make -j1 -f ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.makefile (rm -f ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe ; mkfifo ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe ; head -c 1048576 < ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe >> ../files/ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.sim & ./ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe 2>&1)