Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.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 12.0.0-master/package.mo", uses=false) Using package Buildings with version 12.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-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: translateModel(Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement,tolerance=1e-06,outputFormat="mat",numberOfIntervals=17520,variableFilter="time|thermalZoneOneElement.TAir",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement") translateModel(Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement,tolerance=1e-06,outputFormat="mat",numberOfIntervals=17520,variableFilter="time|thermalZoneOneElement.TAir",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.008426/0.008426, allocations: 100.9 kB / 15.73 MB, free: 6.039 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001764/0.001764, allocations: 202.2 kB / 16.68 MB, free: 5.965 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.372/1.372, allocations: 222.9 MB / 240.4 MB, free: 4.332 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo): time 2.859/2.859, allocations: 472.6 MB / 0.7453 GB, free: 4.582 MB / 0.5919 GB Notification: Performance of FrontEnd - loaded program: time 0.001368/0.001368, allocations: 63.89 kB / 1.069 GB, free: 9.242 MB / 0.8262 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2985/0.2999, allocations: 159.9 MB / 1.226 GB, free: 9.23 MB / 0.9825 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement): time 0.7655/1.065, allocations: 162 MB / 1.384 GB, free: 1.027 MB / 1.076 GB Notification: Performance of NFInst.instExpressions: time 0.03421/1.1, allocations: 26.95 MB / 1.41 GB, free: 10.96 MB / 1.107 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003014/1.103, allocations: 71.75 kB / 1.41 GB, free: 10.93 MB / 1.107 GB Notification: Performance of NFTyping.typeComponents: time 0.002408/1.105, allocations: 1.044 MB / 1.411 GB, free: 10.18 MB / 1.107 GB Notification: Performance of NFTyping.typeBindings: time 0.005387/1.111, allocations: 1.796 MB / 1.413 GB, free: 8.82 MB / 1.107 GB Notification: Performance of NFTyping.typeClassSections: time 0.004428/1.115, allocations: 1.719 MB / 1.415 GB, free: 7.457 MB / 1.107 GB Notification: Performance of NFFlatten.flatten: time 0.007025/1.122, allocations: 5.303 MB / 1.42 GB, free: 4.242 MB / 1.107 GB Notification: Performance of NFFlatten.resolveConnections: time 0.00524/1.127, allocations: 4.166 MB / 1.424 GB, free: 1.691 MB / 1.107 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00414/1.131, allocations: 2.108 MB / 1.426 GB, free: 500 kB / 1.107 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004014/1.136, allocations: 2.523 MB / 1.428 GB, free: 14.55 MB / 1.123 GB Notification: Performance of NFPackage.collectConstants: time 0.000997/1.137, allocations: 460 kB / 1.429 GB, free: 14.1 MB / 1.123 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002749/1.139, allocations: 1.058 MB / 1.43 GB, free: 13.05 MB / 1.123 GB Notification: Performance of NFScalarize.scalarize: time 0.001051/1.14, allocations: 1.172 MB / 1.431 GB, free: 11.87 MB / 1.123 GB Notification: Performance of NFVerifyModel.verify: time 0.002787/1.143, allocations: 2.13 MB / 1.433 GB, free: 9.73 MB / 1.123 GB Notification: Performance of NFConvertDAE.convert: time 0.007172/1.15, allocations: 6.006 MB / 1.439 GB, free: 3.703 MB / 1.123 GB Notification: Performance of FrontEnd - DAE generated: time 4.729e-06/1.15, allocations: 0 / 1.439 GB, free: 3.703 MB / 1.123 GB Notification: Performance of FrontEnd: time 1.823e-06/1.15, allocations: 0 / 1.439 GB, free: 3.703 MB / 1.123 GB Notification: Performance of Transformations before backend: time 0.0001125/1.151, allocations: 0 / 1.439 GB, free: 3.703 MB / 1.123 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 816 * Number of variables: 816 Notification: Performance of Generate backend data structure: time 0.009352/1.16, allocations: 4.741 MB / 1.444 GB, free: 14.86 MB / 1.139 GB Notification: Performance of prepare preOptimizeDAE: time 4.21e-05/1.16, allocations: 12.03 kB / 1.444 GB, free: 14.85 MB / 1.139 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01344/1.173, allocations: 2.793 MB / 1.446 GB, free: 12.05 MB / 1.139 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004433/1.178, allocations: 2.343 MB / 1.449 GB, free: 9.637 MB / 1.139 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001909/1.178, allocations: 238.4 kB / 1.449 GB, free: 9.402 MB / 1.139 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0006132/1.179, allocations: 308 kB / 1.449 GB, free: 9.102 MB / 1.139 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01137/1.19, allocations: 5.166 MB / 1.454 GB, free: 3.855 MB / 1.139 GB Notification: Performance of preOpt findStateOrder (simulation): time 6.786e-05/1.19, allocations: 7.891 kB / 1.454 GB, free: 3.848 MB / 1.139 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000355/1.191, allocations: 128 kB / 1.454 GB, free: 3.723 MB / 1.139 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.773e-05/1.191, allocations: 80 kB / 1.454 GB, free: 3.645 MB / 1.139 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.01493/1.206, allocations: 6.291 MB / 1.46 GB, free: 13.34 MB / 1.154 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 0.02543/1.231, allocations: 14.83 MB / 1.475 GB, free: 13.89 MB / 1.17 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01003/1.241, allocations: 4.703 MB / 1.48 GB, free: 9.172 MB / 1.17 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.004996/1.246, allocations: 2.433 MB / 1.482 GB, free: 6.727 MB / 1.17 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0008509/1.247, allocations: 0.6735 MB / 1.483 GB, free: 5.922 MB / 1.17 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.005453/1.252, allocations: 2.624 MB / 1.485 GB, free: 3.258 MB / 1.17 GB Notification: Performance of pre-optimization done (n=278): time 4.599e-06/1.252, allocations: 4 kB / 1.485 GB, free: 3.254 MB / 1.17 GB Notification: Performance of matching and sorting (n=278): time 0.0184/1.271, allocations: 7.413 MB / 1.492 GB, free: 11.72 MB / 1.186 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001135/1.271, allocations: 210.1 kB / 1.493 GB, free: 11.47 MB / 1.186 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003869/1.275, allocations: 2.442 MB / 1.495 GB, free: 9.004 MB / 1.186 GB Notification: Performance of collectPreVariables (initialization): time 0.0004976/1.275, allocations: 73.7 kB / 1.495 GB, free: 8.926 MB / 1.186 GB Notification: Performance of collectInitialEqns (initialization): time 0.00121/1.277, allocations: 1.356 MB / 1.496 GB, free: 7.555 MB / 1.186 GB Notification: Performance of collectInitialBindings (initialization): time 0.001153/1.278, allocations: 0.9567 MB / 1.497 GB, free: 6.59 MB / 1.186 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001448/1.279, allocations: 0.5088 MB / 1.498 GB, free: 6.074 MB / 1.186 GB Notification: Performance of setup shared object (initialization): time 9.528e-05/1.279, allocations: 305.1 kB / 1.498 GB, free: 5.773 MB / 1.186 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005019/1.284, allocations: 2.023 MB / 1.5 GB, free: 3.746 MB / 1.186 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.005345/1.29, allocations: 2.348 MB / 1.502 GB, free: 1.324 MB / 1.186 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.009988/1.3, allocations: 4.273 MB / 1.507 GB, free: 12.96 MB / 1.201 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.197e-06/1.3, allocations: 4 kB / 1.507 GB, free: 12.96 MB / 1.201 GB Notification: Performance of matching and sorting (n=322) (initialization): time 0.01203/1.312, allocations: 5.014 MB / 1.511 GB, free: 7.898 MB / 1.201 GB Notification: Performance of prepare postOptimizeDAE: time 2.35e-05/1.312, allocations: 4 kB / 1.511 GB, free: 7.895 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.386e-05/1.312, allocations: 4 kB / 1.511 GB, free: 7.891 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006612/1.312, allocations: 243.6 kB / 1.512 GB, free: 7.652 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004067/1.317, allocations: 0.815 MB / 1.512 GB, free: 6.836 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004216/1.321, allocations: 3.375 MB / 1.516 GB, free: 3.324 MB / 1.201 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003901/1.325, allocations: 0.5667 MB / 1.516 GB, free: 2.758 MB / 1.201 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005214/1.325, allocations: 119.9 kB / 1.516 GB, free: 2.641 MB / 1.201 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 17 * Number of states: 0 () * Number of discrete variables: 34 ($PRE.intGai.nextTimeEvent,$whenCondition1,weaDat.conTim.canRepeatWeatherFile,weaDat.conTimMin.canRepeatWeatherFile,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEvent,HDirTil[2].incAng.decAng.tNext,$PRE.HDirTil[2].incAng.decAng.tNext,HDirTil[1].incAng.decAng.tNext,$PRE.HDirTil[1].incAng.decAng.tNext,HDifTil[2].incAng.decAng.tNext,$PRE.HDifTil[2].incAng.decAng.tNext,HDifTil[1].incAng.decAng.tNext,$PRE.HDifTil[1].incAng.decAng.tNext,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6,$whenCondition7,$whenCondition8,$whenCondition9,$whenCondition10) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (300): * Single equations (assignments): 299 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(2,21,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.002275/1.328, allocations: 0.9388 MB / 1.517 GB, free: 1.691 MB / 1.201 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000871/1.328, allocations: 286.1 kB / 1.518 GB, free: 1.41 MB / 1.201 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01397/1.342, allocations: 5.627 MB / 1.523 GB, free: 11.72 MB / 1.217 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.27e-05/1.342, allocations: 32 kB / 1.523 GB, free: 11.69 MB / 1.217 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.518e-05/1.342, allocations: 4 kB / 1.523 GB, free: 11.68 MB / 1.217 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.524e-05/1.343, allocations: 15.94 kB / 1.523 GB, free: 11.67 MB / 1.217 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005641/1.348, allocations: 3.7 MB / 1.527 GB, free: 7.914 MB / 1.217 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.419e-05/1.348, allocations: 4 kB / 1.527 GB, free: 7.91 MB / 1.217 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003828/1.352, allocations: 0.741 MB / 1.528 GB, free: 7.168 MB / 1.217 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0008623/1.353, allocations: 266.3 kB / 1.528 GB, free: 6.898 MB / 1.217 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0004037/1.353, allocations: 79.92 kB / 1.528 GB, free: 6.82 MB / 1.217 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005191/1.359, allocations: 5.241 MB / 1.533 GB, free: 1.281 MB / 1.217 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.749e-05/1.359, allocations: 4 kB / 1.533 GB, free: 1.277 MB / 1.217 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01713/1.376, allocations: 8.039 MB / 1.541 GB, free: 9.148 MB / 1.232 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001657/1.377, allocations: 0.842 MB / 1.542 GB, free: 8.285 MB / 1.232 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006838/1.378, allocations: 75.81 kB / 1.542 GB, free: 8.211 MB / 1.232 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003248/1.381, allocations: 415.4 kB / 1.542 GB, free: 7.805 MB / 1.232 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004437/1.382, allocations: 202 kB / 1.542 GB, free: 7.605 MB / 1.232 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002628/1.382, allocations: 107.9 kB / 1.542 GB, free: 7.5 MB / 1.232 GB Notification: Performance of sorting global known variables: time 0.002308/1.384, allocations: 1.777 MB / 1.544 GB, free: 5.711 MB / 1.232 GB Notification: Performance of sort global known variables: time 1.5e-07/1.384, allocations: 0 / 1.544 GB, free: 5.711 MB / 1.232 GB Notification: Performance of remove unused functions: time 0.002634/1.387, allocations: 1.08 MB / 1.545 GB, free: 4.629 MB / 1.232 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 3 (thermalZoneOneElement.volAir.dynBal.U,thermalZoneOneElement.volAir.dynBal.m,thermalZoneOneElement.extWallRC.thermCapExt[1].T) * Number of discrete variables: 21 ($whenCondition10,$whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,HDifTil[1].incAng.decAng.tNext,HDifTil[2].incAng.decAng.tNext,HDirTil[1].incAng.decAng.tNext,HDirTil[2].incAng.decAng.tNext,intGai.nextTimeEvent,intGai.nextTimeEventScaled) * Number of discrete states: 11 (intGai.nextTimeEventScaled,intGai.nextTimeEvent,HDirTil[2].incAng.decAng.tNext,HDirTil[1].incAng.decAng.tNext,HDifTil[2].incAng.decAng.tNext,HDifTil[1].incAng.decAng.tNext,weaDat.decAng.tNext,weaDat.eqnTim.tNext,weaDat.conTim.tNext,weaDat.conTimMin.tNext,weaDat.locTim.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (276): * Single equations (assignments): 262 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 11 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,16,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002364/1.389, allocations: 1.062 MB / 1.546 GB, free: 3.906 MB / 1.232 GB Notification: Performance of simCode: created initialization part: time 0.01105/1.4, allocations: 4.905 MB / 1.551 GB, free: 14.95 MB / 1.248 GB Notification: Performance of simCode: created event and clocks part: time 5.25e-06/1.401, allocations: 0 / 1.551 GB, free: 14.95 MB / 1.248 GB Notification: Performance of simCode: created simulation system equations: time 0.005643/1.406, allocations: 2.785 MB / 1.554 GB, free: 12.14 MB / 1.248 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003026/1.409, allocations: 0.6982 MB / 1.554 GB, free: 11.47 MB / 1.248 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01637/1.426, allocations: 8.027 MB / 1.562 GB, free: 3.395 MB / 1.248 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.004331/1.43, allocations: 2.449 MB / 1.565 GB, free: 0.918 MB / 1.248 GB Notification: Performance of simCode: alias equations: time 0.00584/1.436, allocations: 1.151 MB / 1.566 GB, free: 15.76 MB / 1.264 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001412/1.437, allocations: 287.2 kB / 1.566 GB, free: 15.48 MB / 1.264 GB Notification: Performance of SimCode: time 9.41e-07/1.437, allocations: 0 / 1.566 GB, free: 15.48 MB / 1.264 GB Notification: Performance of Templates: time 0.07722/1.515, allocations: 49.03 MB / 1.614 GB, free: 14.78 MB / 1.311 GB make -j1 -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.makefile (rm -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.pipe ; mkfifo Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.pipe ; head -c 1048576 < Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.pipe >> ../files/Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.sim & ./Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.pipe 2>&1) diffSimulationResults("Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_ThermalZones_ReducedOrder_Examples_SimpleRoomOneElement.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.ThermalZones.ReducedOrder.Examples.SimpleRoomOneElement.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches