Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.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/Buildings 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/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(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u,fileNamePrefix="Buildings_9_Buildings_Fluid_Interfaces_Examples_HeaterCooler_u",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u,fileNamePrefix="Buildings_9_Buildings_Fluid_Interfaces_Examples_HeaterCooler_u",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 0.00153/0.00153, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001879/0.001879, allocations: 195.2 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.375/1.375, allocations: 222.9 MB / 240.2 MB, free: 4.402 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.366/2.366, allocations: 390.2 MB / 0.6647 GB, free: 432 kB / 0.5137 GB Notification: Performance of FrontEnd - loaded program: time 0.001482/0.001482, allocations: 63.91 kB / 0.8126 GB, free: 14.36 MB / 0.67 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.6109/0.6124, allocations: 140.4 MB / 0.9497 GB, free: 9.172 MB / 0.7169 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Interfaces.Examples.HeaterCooler_u): time 0.2869/0.8993, allocations: 300.4 MB / 1.243 GB, free: 4.488 MB / 0.9981 GB Notification: Performance of NFInst.instExpressions: time 0.605/1.504, allocations: 50.03 MB / 1.292 GB, free: 69.41 MB / 0.9981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.01071/1.515, allocations: 298.8 kB / 1.292 GB, free: 69.41 MB / 0.9981 GB Notification: Performance of NFTyping.typeComponents: time 0.009375/1.524, allocations: 3.412 MB / 1.296 GB, free: 69.36 MB / 0.9981 GB Notification: Performance of NFTyping.typeBindings: time 0.02664/1.551, allocations: 9.039 MB / 1.304 GB, free: 69 MB / 0.9981 GB Notification: Performance of NFTyping.typeClassSections: time 0.01671/1.568, allocations: 6.592 MB / 1.311 GB, free: 68.81 MB / 0.9981 GB Notification: Performance of NFFlatten.flatten: time 0.02221/1.59, allocations: 18.46 MB / 1.329 GB, free: 68.77 MB / 0.9981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.01084/1.601, allocations: 5.833 MB / 1.334 GB, free: 67.99 MB / 0.9981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.02134/1.622, allocations: 7.346 MB / 1.342 GB, free: 65.16 MB / 0.9981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.01055/1.633, allocations: 5.069 MB / 1.347 GB, free: 62.5 MB / 0.9981 GB Notification: Performance of NFPackage.collectConstants: time 0.004321/1.637, allocations: 0.5647 MB / 1.347 GB, free: 62.5 MB / 0.9981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01642/1.654, allocations: 4.384 MB / 1.351 GB, free: 60.5 MB / 0.9981 GB Notification: Performance of NFScalarize.scalarize: time 0.002955/1.657, allocations: 1.503 MB / 1.353 GB, free: 59.33 MB / 0.9981 GB Notification: Performance of NFVerifyModel.verify: time 0.008951/1.666, allocations: 3.736 MB / 1.357 GB, free: 56.93 MB / 0.9981 GB Notification: Performance of NFConvertDAE.convert: time 0.01874/1.684, allocations: 10.3 MB / 1.367 GB, free: 50.53 MB / 0.9981 GB Notification: Performance of FrontEnd - DAE generated: time 5.551e-06/1.685, allocations: 0 / 1.367 GB, free: 50.53 MB / 0.9981 GB Notification: Performance of FrontEnd: time 2.094e-06/1.685, allocations: 4 kB / 1.367 GB, free: 50.52 MB / 0.9981 GB Notification: Performance of Transformations before backend: time 0.0003299/1.685, allocations: 3.938 kB / 1.367 GB, free: 50.52 MB / 0.9981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1035 * Number of variables: 1035 Notification: Performance of Generate backend data structure: time 0.0154/1.7, allocations: 7.473 MB / 1.374 GB, free: 43.73 MB / 0.9981 GB Notification: Performance of prepare preOptimizeDAE: time 4.042e-05/1.7, allocations: 16.02 kB / 1.374 GB, free: 43.71 MB / 0.9981 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.001112/1.701, allocations: 0.5354 MB / 1.374 GB, free: 43.17 MB / 0.9981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002816/1.704, allocations: 0.7803 MB / 1.375 GB, free: 42.38 MB / 0.9981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00976/1.714, allocations: 5.052 MB / 1.38 GB, free: 37.41 MB / 0.9981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000239/1.714, allocations: 323.8 kB / 1.38 GB, free: 37.09 MB / 0.9981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000897/1.715, allocations: 424 kB / 1.381 GB, free: 36.68 MB / 0.9981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.007985/1.723, allocations: 4.386 MB / 1.385 GB, free: 32.02 MB / 0.9981 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001216/1.723, allocations: 19.78 kB / 1.385 GB, free: 32 MB / 0.9981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000551/1.724, allocations: 176 kB / 1.385 GB, free: 31.83 MB / 0.9981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.535e-05/1.724, allocations: 116 kB / 1.385 GB, free: 31.71 MB / 0.9981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005285/1.729, allocations: 2.965 MB / 1.388 GB, free: 28.75 MB / 0.9981 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 0.02439/1.754, allocations: 25.28 MB / 1.413 GB, free: 1.617 MB / 0.9981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002747/1.757, allocations: 2.769 MB / 1.416 GB, free: 14.64 MB / 1.014 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001461/1.758, allocations: 0.9954 MB / 1.417 GB, free: 13.65 MB / 1.014 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002844/1.761, allocations: 3.903 MB / 1.421 GB, free: 8.898 MB / 1.014 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.306e-05/1.761, allocations: 72.28 kB / 1.421 GB, free: 8.82 MB / 1.014 GB Notification: Performance of pre-optimization done (n=217): time 3.928e-06/1.761, allocations: 0 / 1.421 GB, free: 8.82 MB / 1.014 GB Notification: Performance of matching and sorting (n=217): time 0.01077/1.772, allocations: 4.077 MB / 1.425 GB, free: 4.664 MB / 1.014 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.976e-05/1.772, allocations: 73.41 kB / 1.425 GB, free: 4.582 MB / 1.014 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.007944/1.78, allocations: 4.295 MB / 1.429 GB, free: 316 kB / 1.014 GB Notification: Performance of collectPreVariables (initialization): time 0.0004362/1.78, allocations: 81.7 kB / 1.429 GB, free: 228 kB / 1.014 GB Notification: Performance of collectInitialEqns (initialization): time 0.002703/1.783, allocations: 2.783 MB / 1.432 GB, free: 13.43 MB / 1.029 GB Notification: Performance of collectInitialBindings (initialization): time 0.001206/1.784, allocations: 0.7639 MB / 1.432 GB, free: 12.67 MB / 1.029 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.00141/1.786, allocations: 0.5762 MB / 1.433 GB, free: 12.09 MB / 1.029 GB Notification: Performance of setup shared object (initialization): time 9.878e-05/1.786, allocations: 303.5 kB / 1.433 GB, free: 11.79 MB / 1.029 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001496/1.787, allocations: 0.8192 MB / 1.434 GB, free: 10.96 MB / 1.029 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002435/1.79, allocations: 1.818 MB / 1.436 GB, free: 8.715 MB / 1.029 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.004035/1.794, allocations: 2.514 MB / 1.438 GB, free: 5.883 MB / 1.029 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.792e-05/1.794, allocations: 4 kB / 1.438 GB, free: 5.879 MB / 1.029 GB Notification: Performance of matching and sorting (n=365) (initialization): time 0.008828/1.803, allocations: 3.557 MB / 1.442 GB, free: 2.262 MB / 1.029 GB Notification: Performance of prepare postOptimizeDAE: time 3.514e-05/1.803, allocations: 12 kB / 1.442 GB, free: 2.25 MB / 1.029 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.885e-05/1.803, allocations: 20 kB / 1.442 GB, free: 2.23 MB / 1.029 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002785/1.805, allocations: 0.6 MB / 1.442 GB, free: 1.625 MB / 1.029 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001785/1.807, allocations: 0.5499 MB / 1.443 GB, free: 1.074 MB / 1.029 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002143/1.809, allocations: 2.691 MB / 1.446 GB, free: 14.28 MB / 1.045 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003693/1.813, allocations: 331.3 kB / 1.446 GB, free: 13.96 MB / 1.045 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002826/1.813, allocations: 143.9 kB / 1.446 GB, free: 13.82 MB / 1.045 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002937/1.816, allocations: 1.568 MB / 1.448 GB, free: 12.24 MB / 1.045 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002148/1.819, allocations: 1.79 MB / 1.449 GB, free: 10.02 MB / 1.045 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00356/1.822, allocations: 2.463 MB / 1.452 GB, free: 7.242 MB / 1.045 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.666e-05/1.822, allocations: 16.17 kB / 1.452 GB, free: 7.227 MB / 1.045 GB Notification: Performance of matching and sorting (n=365) (initialization_lambda0): time 0.00685/1.829, allocations: 3.306 MB / 1.455 GB, free: 3.855 MB / 1.045 GB Notification: Performance of prepare postOptimizeDAE: time 2.336e-05/1.829, allocations: 19.97 kB / 1.455 GB, free: 3.836 MB / 1.045 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.809e-05/1.829, allocations: 24 kB / 1.455 GB, free: 3.812 MB / 1.045 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009971/1.83, allocations: 374.9 kB / 1.455 GB, free: 3.438 MB / 1.045 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001712/1.832, allocations: 0.5576 MB / 1.456 GB, free: 2.879 MB / 1.045 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.008189/1.84, allocations: 8.444 MB / 1.464 GB, free: 9.852 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004086/1.844, allocations: 310.9 kB / 1.464 GB, free: 9.547 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0004175/1.845, allocations: 132 kB / 1.465 GB, free: 9.418 MB / 1.061 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 97 * 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 (323): * Single equations (assignments): 319 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 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): 4 systems {(1,12), (1,9), (1,12), (1,9)} Notification: Performance of prepare postOptimizeDAE: time 0.0008535/1.845, allocations: 376.3 kB / 1.465 GB, free: 9.039 MB / 1.061 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001785/1.847, allocations: 0.5017 MB / 1.465 GB, free: 8.531 MB / 1.061 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007053/1.854, allocations: 3.573 MB / 1.469 GB, free: 4.902 MB / 1.061 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.559e-05/1.854, allocations: 39.97 kB / 1.469 GB, free: 4.863 MB / 1.061 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.128e-05/1.854, allocations: 0 / 1.469 GB, free: 4.863 MB / 1.061 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004098/1.858, allocations: 2.437 MB / 1.471 GB, free: 2.383 MB / 1.061 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 0.01463/1.873, allocations: 8.259 MB / 1.479 GB, free: 9.918 MB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.013e-05/1.873, allocations: 0 / 1.479 GB, free: 9.918 MB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001349/1.874, allocations: 367.5 kB / 1.48 GB, free: 9.559 MB / 1.076 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0007544/1.875, allocations: 311.2 kB / 1.48 GB, free: 9.25 MB / 1.076 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001664/1.875, allocations: 67.95 kB / 1.48 GB, free: 9.184 MB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001856/1.877, allocations: 2.493 MB / 1.482 GB, free: 6.59 MB / 1.076 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.805e-06/1.877, allocations: 3.938 kB / 1.482 GB, free: 6.586 MB / 1.076 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007987/1.885, allocations: 4.334 MB / 1.487 GB, free: 2.18 MB / 1.076 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002446/1.888, allocations: 0.8844 MB / 1.488 GB, free: 1.27 MB / 1.076 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001112/1.889, allocations: 48 kB / 1.488 GB, free: 1.223 MB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002963/1.892, allocations: 115.9 kB / 1.488 GB, free: 1.109 MB / 1.076 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002554/1.892, allocations: 158 kB / 1.488 GB, free: 0.9531 MB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002866/1.892, allocations: 107.9 kB / 1.488 GB, free: 0.8477 MB / 1.076 GB Notification: Performance of sorting global known variables: time 0.005146/1.898, allocations: 2.851 MB / 1.491 GB, free: 14.02 MB / 1.092 GB Notification: Performance of sort global known variables: time 1.8e-07/1.898, allocations: 0 / 1.491 GB, free: 14.02 MB / 1.092 GB Notification: Performance of remove unused functions: time 0.009303/1.907, allocations: 3.234 MB / 1.494 GB, free: 10.78 MB / 1.092 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 10 (hea1.vol.dynBal.U,hea2.vol.dynBal.U,hea3.vol.dynBal.U,hea4.vol.dynBal.U,mix1.dynBal.U,hea5.vol.dynBal.U,hea6.vol.dynBal.U,hea7.vol.dynBal.U,hea8.vol.dynBal.U,mix2.dynBal.U) * 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 (219): * Single equations (assignments): 181 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 34 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 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): 4 systems {(1,9), (1,7), (1,9), (1,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.01093/1.918, allocations: 6.154 MB / 1.5 GB, free: 4.656 MB / 1.092 GB Notification: Performance of simCode: created initialization part: time 0.01351/1.931, allocations: 4.856 MB / 1.505 GB, free: 15.75 MB / 1.107 GB Notification: Performance of simCode: created event and clocks part: time 1.04e-05/1.931, allocations: 5.062 kB / 1.505 GB, free: 15.74 MB / 1.107 GB Notification: Performance of simCode: created simulation system equations: time 0.002458/1.934, allocations: 1.233 MB / 1.506 GB, free: 14.51 MB / 1.107 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01568/1.95, allocations: 2.643 MB / 1.508 GB, free: 11.95 MB / 1.107 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.06957/2.019, allocations: 42.75 MB / 1.55 GB, free: 13.33 MB / 1.154 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.003456/2.023, allocations: 2.873 MB / 1.553 GB, free: 10.43 MB / 1.154 GB Notification: Performance of simCode: alias equations: time 0.005792/2.029, allocations: 1.157 MB / 1.554 GB, free: 9.266 MB / 1.154 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.004526/2.033, allocations: 2.534 MB / 1.557 GB, free: 6.734 MB / 1.154 GB Notification: Performance of SimCode: time 7.21e-07/2.033, allocations: 4 kB / 1.557 GB, free: 6.73 MB / 1.154 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.2395/2.273, allocations: 148.4 MB / 1.702 GB, free: 3.895 MB / 1.295 GB Notification: Performance of buildModelFMU: Generate platform static: time 19.54/21.81, allocations: 4.062 kB / 1.702 GB, free: 3.891 MB / 1.295 GB (rm -f Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.pipe ; mkfifo Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.pipe >> ../files/Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u_res.mat --tempDir=temp_Buildings_9_Buildings_Fluid_Interfaces_Examples_HeaterCooler_u_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_9_Buildings_Fluid_Interfaces_Examples_HeaterCooler_u.fmu > Buildings_9_Buildings.Fluid.Interfaces.Examples.HeaterCooler_u.pipe 2>&1)