Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.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/ScalableTestSuite 2.2.0-master/package.mo", uses=false) Using package ScalableTestSuite with version 2.2.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-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: "" <> buildModelFMU(ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable,fileNamePrefix="ScalableTestSuite_ScalableTestSuite_Elementary_Tables_Models_CombiTimeTable",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable,fileNamePrefix="ScalableTestSuite_ScalableTestSuite_Elementary_Tables_Models_CombiTimeTable",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 0.001254/0.001254, allocations: 112.6 kB / 17.06 MB, free: 6.09 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001221/0.001222, allocations: 199 kB / 18 MB, free: 5.168 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.501/1.501, allocations: 222.9 MB / 241.7 MB, free: 15.06 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-master/package.mo): time 1.232/1.232, allocations: 119.3 MB / 411.2 MB, free: 9.48 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.002252/0.002252, allocations: 65.31 kB / 0.5704 GB, free: 40.19 MB / 462.3 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2012/0.2035, allocations: 80.7 MB / 0.6492 GB, free: 13.69 MB / 0.4983 GB Notification: Performance of NFInst.instantiate(ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable): time 0.004107/0.2077, allocations: 1.554 MB / 0.6507 GB, free: 12.13 MB / 0.4983 GB Notification: Performance of NFInst.instExpressions: time 0.002206/0.2099, allocations: 0.8925 MB / 0.6516 GB, free: 11.23 MB / 0.4983 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001232/0.2101, allocations: 3.938 kB / 0.6516 GB, free: 11.23 MB / 0.4983 GB Notification: Performance of NFTyping.typeComponents: time 0.0003763/0.2105, allocations: 59.73 kB / 0.6516 GB, free: 11.17 MB / 0.4983 GB Notification: Performance of NFTyping.typeBindings: time 0.0004431/0.2109, allocations: 103.6 kB / 0.6517 GB, free: 11.07 MB / 0.4983 GB Notification: Performance of NFTyping.typeClassSections: time 0.0003446/0.2113, allocations: 103.7 kB / 0.6518 GB, free: 10.96 MB / 0.4983 GB Notification: Performance of NFFlatten.flatten: time 0.0002344/0.2115, allocations: 127.6 kB / 0.652 GB, free: 10.84 MB / 0.4983 GB Notification: Performance of NFFlatten.resolveConnections: time 5.412e-05/0.2116, allocations: 15.95 kB / 0.652 GB, free: 10.82 MB / 0.4983 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001623/0.2118, allocations: 63.77 kB / 0.652 GB, free: 10.76 MB / 0.4983 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001386/0.2119, allocations: 67.69 kB / 0.6521 GB, free: 10.7 MB / 0.4983 GB Notification: Performance of NFPackage.collectConstants: time 2.255e-05/0.212, allocations: 4 kB / 0.6521 GB, free: 10.69 MB / 0.4983 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0001033/0.2121, allocations: 32 kB / 0.6521 GB, free: 10.66 MB / 0.4983 GB Notification: Performance of NFScalarize.scalarize: time 0.0001563/0.2122, allocations: 71.73 kB / 0.6522 GB, free: 10.59 MB / 0.4983 GB Notification: Performance of NFVerifyModel.verify: time 7.61e-05/0.2123, allocations: 59.55 kB / 0.6523 GB, free: 10.53 MB / 0.4983 GB Notification: Performance of NFConvertDAE.convert: time 0.0002608/0.2126, allocations: 155 kB / 0.6524 GB, free: 10.38 MB / 0.4983 GB Notification: Performance of FrontEnd - DAE generated: time 4.469e-06/0.2126, allocations: 0 / 0.6524 GB, free: 10.38 MB / 0.4983 GB Notification: Performance of FrontEnd: time 1.663e-06/0.2126, allocations: 4 kB / 0.6524 GB, free: 10.38 MB / 0.4983 GB Notification: Performance of Transformations before backend: time 6.422e-06/0.2126, allocations: 0 / 0.6524 GB, free: 10.38 MB / 0.4983 GB 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 0.0007059/0.2133, allocations: 490.2 kB / 0.6529 GB, free: 9.852 MB / 0.4983 GB Notification: Performance of prepare preOptimizeDAE: time 4.493e-05/0.2134, allocations: 15.89 kB / 0.6529 GB, free: 9.836 MB / 0.4983 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 3.814e-05/0.2134, allocations: 30.75 kB / 0.6529 GB, free: 9.797 MB / 0.4983 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 5.26e-05/0.2135, allocations: 16.75 kB / 0.6529 GB, free: 9.781 MB / 0.4983 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.000522/0.214, allocations: 339.3 kB / 0.6533 GB, free: 9.41 MB / 0.4983 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.638e-05/0.214, allocations: 384 / 0.6533 GB, free: 9.41 MB / 0.4983 GB Notification: Performance of preOpt expandDerOperator (simulation): time 1.665e-05/0.2141, allocations: 15.86 kB / 0.6533 GB, free: 9.395 MB / 0.4983 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00014/0.2142, allocations: 53.62 kB / 0.6533 GB, free: 9.336 MB / 0.4983 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.027e-05/0.2142, allocations: 0 / 0.6533 GB, free: 9.336 MB / 0.4983 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.134e-05/0.2142, allocations: 4 kB / 0.6533 GB, free: 9.332 MB / 0.4983 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.478e-06/0.2142, allocations: 0 / 0.6533 GB, free: 9.332 MB / 0.4983 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 7.003e-05/0.2143, allocations: 11.98 kB / 0.6534 GB, free: 9.32 MB / 0.4983 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0002586/0.2146, allocations: 213.7 kB / 0.6536 GB, free: 9.062 MB / 0.4983 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0001615/0.2148, allocations: 58.55 kB / 0.6536 GB, free: 8.996 MB / 0.4983 GB Notification: Performance of preOpt resolveLoops (simulation): time 6.832e-05/0.2148, allocations: 16.86 kB / 0.6536 GB, free: 8.977 MB / 0.4983 GB Notification: Performance of preOpt evalFunc (simulation): time 2.464e-05/0.2149, allocations: 0 / 0.6536 GB, free: 8.977 MB / 0.4983 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001709/0.215, allocations: 71.33 kB / 0.6537 GB, free: 8.895 MB / 0.4983 GB Notification: Performance of pre-optimization done (n=5): time 1.362e-06/0.2151, allocations: 4 kB / 0.6537 GB, free: 8.891 MB / 0.4983 GB Notification: Performance of matching and sorting (n=5): time 0.0003077/0.2154, allocations: 101.4 kB / 0.6538 GB, free: 8.785 MB / 0.4983 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.924e-05/0.2154, allocations: 55.39 kB / 0.6539 GB, free: 8.719 MB / 0.4983 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002916/0.2157, allocations: 278.7 kB / 0.6541 GB, free: 8.434 MB / 0.4983 GB Notification: Performance of collectPreVariables (initialization): time 1.979e-05/0.2158, allocations: 25.7 kB / 0.6541 GB, free: 8.402 MB / 0.4983 GB Notification: Performance of collectInitialEqns (initialization): time 9.345e-05/0.2159, allocations: 132.1 kB / 0.6543 GB, free: 8.27 MB / 0.4983 GB Notification: Performance of collectInitialBindings (initialization): time 3.682e-05/0.2159, allocations: 23.67 kB / 0.6543 GB, free: 8.246 MB / 0.4983 GB Notification: Performance of simplifyInitialFunctions (initialization): time 4.569e-05/0.216, allocations: 17.72 kB / 0.6543 GB, free: 8.223 MB / 0.4983 GB Notification: Performance of setup shared object (initialization): time 0.0001462/0.2161, allocations: 342.8 kB / 0.6546 GB, free: 7.879 MB / 0.4983 GB Notification: Performance of preBalanceInitialSystem (initialization): time 5.291e-05/0.2162, allocations: 12 kB / 0.6546 GB, free: 7.867 MB / 0.4983 GB Notification: Performance of partitionIndependentBlocks (initialization): time 5.88e-05/0.2162, allocations: 25.7 kB / 0.6547 GB, free: 7.836 MB / 0.4983 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001072/0.2164, allocations: 45.7 kB / 0.6547 GB, free: 7.785 MB / 0.4983 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.889e-06/0.2164, allocations: 3.938 kB / 0.6547 GB, free: 7.781 MB / 0.4983 GB Notification: Performance of matching and sorting (n=7) (initialization): time 0.0001719/0.2165, allocations: 97.72 kB / 0.6548 GB, free: 7.68 MB / 0.4983 GB Notification: Performance of prepare postOptimizeDAE: time 1.831e-05/0.2166, allocations: 4 kB / 0.6548 GB, free: 7.676 MB / 0.4983 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.031e-06/0.2166, allocations: 0 / 0.6548 GB, free: 7.676 MB / 0.4983 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.671e-05/0.2166, allocations: 0 / 0.6548 GB, free: 7.676 MB / 0.4983 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 8.53e-05/0.2167, allocations: 15.98 kB / 0.6548 GB, free: 7.66 MB / 0.4983 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 7.474e-06/0.2167, allocations: 0 / 0.6548 GB, free: 7.66 MB / 0.4983 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 5.318e-05/0.2168, allocations: 7.844 kB / 0.6548 GB, free: 7.652 MB / 0.4983 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.235e-06/0.2168, allocations: 8 kB / 0.6548 GB, free: 7.645 MB / 0.4983 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 2 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.combiTimeTable.nextTimeEvent,$whenCondition1,combiTimeTable.nextTimeEventScaled,$PRE.combiTimeTable.nextTimeEventScaled,combiTimeTable.nextTimeEvent) * 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 (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001298/0.2169, allocations: 145.7 kB / 0.655 GB, free: 7.492 MB / 0.4983 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 3.057e-05/0.217, allocations: 19.81 kB / 0.655 GB, free: 7.473 MB / 0.4983 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 5.321e-05/0.217, allocations: 29.3 kB / 0.655 GB, free: 7.441 MB / 0.4983 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.248e-06/0.217, allocations: 7.938 kB / 0.655 GB, free: 7.434 MB / 0.4983 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.048e-06/0.217, allocations: 0 / 0.655 GB, free: 7.434 MB / 0.4983 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.086e-06/0.217, allocations: 0 / 0.655 GB, free: 7.434 MB / 0.4983 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001825/0.2172, allocations: 221.4 kB / 0.6552 GB, free: 7.168 MB / 0.4983 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.382e-06/0.2172, allocations: 4 kB / 0.6553 GB, free: 7.164 MB / 0.4983 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 2.117e-05/0.2173, allocations: 3.984 kB / 0.6553 GB, free: 7.16 MB / 0.4983 GB Notification: Performance of postOpt tearingSystem (simulation): time 3.867e-06/0.2173, allocations: 4 kB / 0.6553 GB, free: 7.156 MB / 0.4983 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 9.437e-06/0.2173, allocations: 0 / 0.6553 GB, free: 7.156 MB / 0.4983 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.693e-06/0.2173, allocations: 0 / 0.6553 GB, free: 7.156 MB / 0.4983 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.092e-06/0.2173, allocations: 4 kB / 0.6553 GB, free: 7.152 MB / 0.4983 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0001995/0.2175, allocations: 116.9 kB / 0.6554 GB, free: 7.02 MB / 0.4983 GB Notification: Performance of postOpt removeConstants (simulation): time 7.038e-05/0.2176, allocations: 100.8 kB / 0.6555 GB, free: 6.902 MB / 0.4983 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.393e-05/0.2176, allocations: 3.938 kB / 0.6555 GB, free: 6.898 MB / 0.4983 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 4.294e-05/0.2177, allocations: 4 kB / 0.6555 GB, free: 6.895 MB / 0.4983 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 4.046e-05/0.2177, allocations: 7.984 kB / 0.6555 GB, free: 6.887 MB / 0.4983 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.464e-05/0.2177, allocations: 4.125 kB / 0.6555 GB, free: 6.883 MB / 0.4983 GB Notification: Performance of sorting global known variables: time 0.0001822/0.2179, allocations: 209.9 kB / 0.6557 GB, free: 6.68 MB / 0.4983 GB Notification: Performance of sort global known variables: time 1.3e-07/0.2179, allocations: 0 / 0.6557 GB, free: 6.68 MB / 0.4983 GB Notification: Performance of remove unused functions: time 0.0002184/0.2181, allocations: 16 kB / 0.6557 GB, free: 6.664 MB / 0.4983 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,combiTimeTable.nextTimeEvent,combiTimeTable.nextTimeEventScaled) * Number of discrete states: 2 (combiTimeTable.nextTimeEventScaled,combiTimeTable.nextTimeEvent) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (5): * Single equations (assignments): 3 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 0.001321/0.2195, allocations: 0.9676 MB / 0.6567 GB, free: 5.832 MB / 0.4983 GB Notification: Performance of simCode: created initialization part: time 0.0001609/0.2196, allocations: 47.91 kB / 0.6567 GB, free: 5.785 MB / 0.4983 GB Notification: Performance of simCode: created event and clocks part: time 1.884e-06/0.2197, allocations: 0 / 0.6567 GB, free: 5.785 MB / 0.4983 GB Notification: Performance of simCode: created simulation system equations: time 5.728e-05/0.2197, allocations: 16 kB / 0.6567 GB, free: 5.77 MB / 0.4983 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002859/0.22, allocations: 48.28 kB / 0.6568 GB, free: 5.723 MB / 0.4983 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002286/0.2223, allocations: 1.972 MB / 0.6587 GB, free: 3.652 MB / 0.4983 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003789/0.2227, allocations: 0.7358 MB / 0.6594 GB, free: 2.891 MB / 0.4983 GB Notification: Performance of simCode: alias equations: time 0.0001252/0.2228, allocations: 37.66 kB / 0.6594 GB, free: 2.855 MB / 0.4983 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001104/0.223, allocations: 67.41 kB / 0.6595 GB, free: 2.789 MB / 0.4983 GB Notification: Performance of SimCode: time 3.61e-07/0.223, allocations: 4 kB / 0.6595 GB, free: 2.785 MB / 0.4983 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02362/0.2466, allocations: 4.383 MB / 0.6638 GB, free: 14.54 MB / 0.5139 GB Notification: Performance of buildModelFMU: Generate platform static: time 7.962/8.209, allocations: 10.53 kB / 0.6638 GB, free: 14.53 MB / 0.5139 GB (rm -f ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.pipe ; mkfifo ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.pipe ; head -c 1048576 < ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.pipe >> ../files/ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable_res.mat --tempDir=temp_ScalableTestSuite_ScalableTestSuite_Elementary_Tables_Models_CombiTimeTable_fmu --startTime=0 --stopTime=1 --timeout=300 --tolerance=1e-06 ScalableTestSuite_ScalableTestSuite_Elementary_Tables_Models_CombiTimeTable.fmu > ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.pipe 2>&1) diffSimulationResults("ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/ReferenceFiles/ScalableTestSuite/ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ScalableTestSuite_ScalableTestSuite.Elementary.Tables.Models.CombiTimeTable.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) "" Variables in the reference:combiTimeTable.y[1],time,time Variables in the result:N,combiTimeTable.columns[1],combiTimeTable.extrapolation,combiTimeTable.nout,combiTimeTable.offset[1],combiTimeTable.shiftTime,combiTimeTable.smoothness,combiTimeTable.startTime,combiTimeTable.t_max,combiTimeTable.t_maxScaled,combiTimeTable.t_min,combiTimeTable.t_minScaled,combiTimeTable.tableOnFile,combiTimeTable.table[1,1],combiTimeTable.table[1,2],combiTimeTable.table[10,1],combiTimeTable.table[10,2],combiTimeTable.table[2,1],combiTimeTable.table[2,2],combiTimeTable.table[3,1],combiTimeTable.table[3,2],combiTimeTable.table[4,1],combiTimeTable.table[4,2],combiTimeTable.table[5,1],combiTimeTable.table[5,2],combiTimeTable.table[6,1],combiTimeTable.table[6,2],combiTimeTable.table[7,1],combiTimeTable.table[7,2],combiTimeTable.table[8,1],combiTimeTable.table[8,2],combiTimeTable.table[9,1],combiTimeTable.table[9,2],combiTimeTable.timeEvents,combiTimeTable.timeScale,combiTimeTable.verboseExtrapolation,combiTimeTable.verboseRead,combiTimeTable.y[1],tableX[10],tableX[1],tableX[2],tableX[3],tableX[4],tableX[5],tableX[6],tableX[7],tableX[8],tableX[9],tableY[10],tableY[1],tableY[2],tableY[3],tableY[4],tableY[5],tableY[6],tableY[7],tableY[8],tableY[9],time