Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.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: translateModel(ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="T.1.|T.2.|T.3.|T.80.|der.T.2..|der.T.3..|time|time",fileNamePrefix="ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80")
translateModel(ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="T.1.|T.2.|T.3.|T.80.|der.T.2..|der.T.3..|time|time",fileNamePrefix="ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001307/0.001307, allocations: 91.02 kB / 16.31 MB, free: 5.66 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001439/0.00144, allocations: 176.2 kB / 17.21 MB, free: 5.578 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.373/1.373, allocations: 223.3 MB / 241.2 MB, free: 5.449 MB / 190.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-master/package.mo): time 0.7503/0.7503, allocations: 120.5 MB / 412.8 MB, free: 12.1 MB / 350.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.0003024/0.0003024, allocations: 8 kB / 0.4943 GB, free: 11.12 MB / 366.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.1439/0.1442, allocations: 82.84 MB / 0.5752 GB, free: 8.148 MB / 446.1 MB
Notification: Performance of NFInst.instantiate(ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80): time 0.001266/0.1455, allocations: 1.066 MB / 0.5762 GB, free: 7.074 MB / 446.1 MB
Notification: Performance of NFInst.instExpressions: time 0.000169/0.1457, allocations: 47.86 kB / 0.5763 GB, free: 7.027 MB / 446.1 MB
Notification: Performance of NFInst.updateImplicitVariability: time 3.074e-05/0.1458, allocations: 0 / 0.5763 GB, free: 7.027 MB / 446.1 MB
Notification: Performance of NFTyping.typeComponents: time 8.957e-05/0.1459, allocations: 0 / 0.5763 GB, free: 7.027 MB / 446.1 MB
Notification: Performance of NFTyping.typeBindings: time 7.939e-05/0.146, allocations: 27.83 kB / 0.5763 GB, free: 7 MB / 446.1 MB
Notification: Performance of NFTyping.typeClassSections: time 0.0001165/0.1461, allocations: 11.98 kB / 0.5763 GB, free: 6.988 MB / 446.1 MB
Notification: Performance of NFFlatten.flatten: time 0.0009495/0.147, allocations: 1.119 MB / 0.5774 GB, free: 5.867 MB / 446.1 MB
Notification: Performance of NFFlatten.resolveConnections: time 5.861e-05/0.1471, allocations: 15.98 kB / 0.5774 GB, free: 5.852 MB / 446.1 MB
Notification: Performance of NFEvalConstants.evaluate: time 0.0003544/0.1475, allocations: 451.5 kB / 0.5778 GB, free: 5.41 MB / 446.1 MB
Notification: Performance of NFSimplifyModel.simplify: time 0.0008704/0.1483, allocations: 0.7567 MB / 0.5786 GB, free: 4.652 MB / 446.1 MB
Notification: Performance of NFPackage.collectConstants: time 0.000121/0.1485, allocations: 76 kB / 0.5786 GB, free: 4.578 MB / 446.1 MB
Notification: Performance of NFFlatten.collectFunctions: time 0.0001387/0.1486, allocations: 72 kB / 0.5787 GB, free: 4.508 MB / 446.1 MB
Notification: Performance of NFScalarize.scalarize: time 0.0003487/0.149, allocations: 483 kB / 0.5792 GB, free: 4.035 MB / 446.1 MB
Notification: Performance of NFVerifyModel.verify: time 0.0001558/0.1491, allocations: 153.5 kB / 0.5793 GB, free: 3.879 MB / 446.1 MB
Notification: Performance of NFConvertDAE.convert: time 0.0003917/0.1495, allocations: 0.5186 MB / 0.5798 GB, free: 3.359 MB / 446.1 MB
Notification: Performance of FrontEnd - DAE generated: time 5.39e-06/0.1495, allocations: 0 / 0.5798 GB, free: 3.359 MB / 446.1 MB
Notification: Performance of FrontEnd: time 1.403e-06/0.1495, allocations: 0 / 0.5798 GB, free: 3.359 MB / 446.1 MB
Notification: Performance of Transformations before backend: time 6.963e-06/0.1496, allocations: 0 / 0.5798 GB, free: 3.359 MB / 446.1 MB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 158
 * Number of variables: 158
Notification: Performance of Generate backend data structure: time 0.006886/0.1565, allocations: 2.513 MB / 0.5823 GB, free: 0.7891 MB / 446.1 MB
Notification: Performance of prepare preOptimizeDAE: time 3.966e-05/0.1565, allocations: 8.031 kB / 0.5823 GB, free: 0.7812 MB / 446.1 MB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002042/0.1567, allocations: 79.3 kB / 0.5824 GB, free: 0.7031 MB / 446.1 MB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.000519/0.1572, allocations: 362.2 kB / 0.5827 GB, free: 316 kB / 446.1 MB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.576e-05/0.1573, allocations: 69.25 kB / 0.5828 GB, free: 248 kB / 446.1 MB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001784/0.1575, allocations: 127.6 kB / 0.5829 GB, free: 120 kB / 446.1 MB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.4537/0.6111, allocations: 0.8446 MB / 0.5837 GB, free: 15.46 MB / 446.3 MB
Notification: Performance of preOpt findStateOrder (simulation): time 2.641e-05/0.6112, allocations: 0 / 0.5837 GB, free: 15.46 MB / 446.3 MB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.252e-05/0.6113, allocations: 25.22 kB / 0.5837 GB, free: 15.46 MB / 446.3 MB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.35e-05/0.6114, allocations: 17.45 kB / 0.5838 GB, free: 15.46 MB / 446.3 MB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0009417/0.6123, allocations: 0.5085 MB / 0.5843 GB, free: 15.46 MB / 446.3 MB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.008977/0.6213, allocations: 6.838 MB / 0.5909 GB, free: 10.17 MB / 446.3 MB
Notification: Performance of preOpt comSubExp (simulation): time 0.02721/0.6485, allocations: 4.332 MB / 0.5952 GB, free: 9.809 MB / 446.3 MB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0008832/0.6495, allocations: 384.8 kB / 0.5955 GB, free: 9.688 MB / 446.3 MB
Notification: Performance of preOpt evalFunc (simulation): time 0.0001199/0.6496, allocations: 11.81 kB / 0.5955 GB, free: 9.684 MB / 446.3 MB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.5e-05/0.6496, allocations: 43.39 kB / 0.5956 GB, free: 9.637 MB / 446.3 MB
Notification: Performance of pre-optimization done (n=78): time 2.474e-06/0.6496, allocations: 0 / 0.5956 GB, free: 9.637 MB / 446.3 MB
Notification: Performance of matching and sorting (n=78): time 0.002263/0.6519, allocations: 1.222 MB / 0.5968 GB, free: 9.266 MB / 446.3 MB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.434e-05/0.6519, allocations: 63.64 kB / 0.5968 GB, free: 9.199 MB / 446.3 MB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001241/0.6521, allocations: 140.3 kB / 0.597 GB, free: 9.086 MB / 446.3 MB
Notification: Performance of collectPreVariables (initialization): time 7.259e-05/0.6522, allocations: 51.64 kB / 0.597 GB, free: 9.035 MB / 446.3 MB
Notification: Performance of collectInitialEqns (initialization): time 9.784e-05/0.6523, allocations: 209.6 kB / 0.5972 GB, free: 8.863 MB / 446.3 MB
Notification: Performance of collectInitialBindings (initialization): time 0.0002047/0.6525, allocations: 359.2 kB / 0.5976 GB, free: 8.586 MB / 446.3 MB
Notification: Performance of simplifyInitialFunctions (initialization): time 7.301e-05/0.6525, allocations: 25.34 kB / 0.5976 GB, free: 8.566 MB / 446.3 MB
Notification: Performance of setup shared object (initialization): time 8.473e-05/0.6526, allocations: 366.1 kB / 0.5979 GB, free: 8.23 MB / 446.3 MB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.000757/0.6534, allocations: 489.2 kB / 0.5984 GB, free: 8.109 MB / 446.3 MB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007469/0.6542, allocations: 0.5004 MB / 0.5989 GB, free: 7.969 MB / 446.3 MB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0008758/0.655, allocations: 0.557 MB / 0.5994 GB, free: 7.789 MB / 446.3 MB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.456e-06/0.6551, allocations: 0 / 0.5994 GB, free: 7.789 MB / 446.3 MB
Notification: Performance of matching and sorting (n=156) (initialization): time 0.0021/0.6572, allocations: 1.285 MB / 0.6007 GB, free: 7.371 MB / 446.3 MB
Notification: Performance of prepare postOptimizeDAE: time 1.822e-05/0.6572, allocations: 6.625 kB / 0.6007 GB, free: 7.371 MB / 446.3 MB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.686e-06/0.6572, allocations: 7.562 kB / 0.6007 GB, free: 7.367 MB / 446.3 MB
Notification: Performance of postOpt tearingSystem (initialization): time 2.261e-05/0.6572, allocations: 3.969 kB / 0.6007 GB, free: 7.367 MB / 446.3 MB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001816/0.659, allocations: 325.5 kB / 0.601 GB, free: 7.328 MB / 446.3 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.598e-05/0.6591, allocations: 7.391 kB / 0.601 GB, free: 7.328 MB / 446.3 MB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00115/0.6602, allocations: 194.7 kB / 0.6012 GB, free: 7.234 MB / 446.3 MB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.181e-05/0.6603, allocations: 41.86 kB / 0.6013 GB, free: 7.219 MB / 446.3 MB
Notification: Model statistics after passing the back-end for initialization:
 * 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 initialization (156):
 * Single equations (assignments): 156
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Performance of prepare postOptimizeDAE: time 0.0002993/0.6606, allocations: 219.5 kB / 0.6015 GB, free: 7.059 MB / 446.3 MB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001062/0.6607, allocations: 31.73 kB / 0.6015 GB, free: 7.047 MB / 446.3 MB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0004665/0.6612, allocations: 152.5 kB / 0.6016 GB, free: 6.895 MB / 446.3 MB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.227e-06/0.6612, allocations: 8.844 kB / 0.6016 GB, free: 6.895 MB / 446.3 MB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.863e-05/0.6612, allocations: 0 / 0.6016 GB, free: 6.895 MB / 446.3 MB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.635e-06/0.6613, allocations: 7.984 kB / 0.6017 GB, free: 6.887 MB / 446.3 MB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0009039/0.6622, allocations: 0.6718 MB / 0.6023 GB, free: 6.441 MB / 446.3 MB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.387e-06/0.6622, allocations: 1.25 kB / 0.6023 GB, free: 6.441 MB / 446.3 MB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001823/0.664, allocations: 237.9 kB / 0.6025 GB, free: 6.352 MB / 446.3 MB
Notification: Performance of postOpt tearingSystem (simulation): time 7.093e-06/0.664, allocations: 2.531 kB / 0.6025 GB, free: 6.352 MB / 446.3 MB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001109/0.6641, allocations: 49.19 kB / 0.6026 GB, free: 6.328 MB / 446.3 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.659e-06/0.6642, allocations: 2.5 kB / 0.6026 GB, free: 6.328 MB / 446.3 MB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.536e-06/0.6642, allocations: 7.938 kB / 0.6026 GB, free: 6.324 MB / 446.3 MB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002119/0.6663, allocations: 1.405 MB / 0.604 GB, free: 5.648 MB / 446.3 MB
Notification: Performance of postOpt removeConstants (simulation): time 9.087e-05/0.6664, allocations: 119.6 kB / 0.6041 GB, free: 5.523 MB / 446.3 MB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001434/0.6665, allocations: 38.62 kB / 0.6041 GB, free: 5.508 MB / 446.3 MB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001069/0.6676, allocations: 136 kB / 0.6042 GB, free: 5.422 MB / 446.3 MB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001313/0.6677, allocations: 50.7 kB / 0.6043 GB, free: 5.395 MB / 446.3 MB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.144e-05/0.6678, allocations: 23.11 kB / 0.6043 GB, free: 5.387 MB / 446.3 MB
Notification: Performance of sorting global known variables: time 4.817e-05/0.6679, allocations: 94.94 kB / 0.6044 GB, free: 5.305 MB / 446.3 MB
Notification: Performance of sort global known variables: time 1.1e-07/0.6679, allocations: 0 / 0.6044 GB, free: 5.305 MB / 446.3 MB
Notification: Performance of remove unused functions: time 0.0007824/0.6687, allocations: 342.2 kB / 0.6047 GB, free: 5.25 MB / 446.3 MB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 78 (Ttilde[1],Ttilde[2],Ttilde[3],Ttilde[4],Ttilde[5],Ttilde[6],Ttilde[7],Ttilde[8],Ttilde[9],Ttilde[10],Ttilde[11],Ttilde[12],Ttilde[13],Ttilde[14],Ttilde[15],Ttilde[16],Ttilde[17],Ttilde[18],Ttilde[19],Ttilde[20],Ttilde[21],Ttilde[22],Ttilde[23],Ttilde[24],Ttilde[25],Ttilde[26],Ttilde[27],Ttilde[28],Ttilde[29],Ttilde[30],Ttilde[31],Ttilde[32],Ttilde[33],Ttilde[34],Ttilde[35],Ttilde[36],Ttilde[37],Ttilde[38],Ttilde[39],Ttilde[40],Ttilde[41],Ttilde[42],Ttilde[43],Ttilde[44],Ttilde[45],Ttilde[46],Ttilde[47],Ttilde[48],Ttilde[49],Ttilde[50],Ttilde[51],Ttilde[52],Ttilde[53],Ttilde[54],Ttilde[55],Ttilde[56],Ttilde[57],Ttilde[58],Ttilde[59],Ttilde[60],Ttilde[61],Ttilde[62],Ttilde[63],Ttilde[64],Ttilde[65],Ttilde[66],Ttilde[67],Ttilde[68],Ttilde[69],Ttilde[70],Ttilde[71],Ttilde[72],Ttilde[73],Ttilde[74],Ttilde[75],Ttilde[76],Ttilde[77],Ttilde[78])
 * 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 (78):
 * Single equations (assignments): 78
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Performance of Backend phase and start with SimCode phase: time 0.0001943/0.6689, allocations: 163.3 kB / 0.6049 GB, free: 5.117 MB / 446.3 MB
Notification: Performance of simCode: created initialization part: time 0.001676/0.6706, allocations: 1.058 MB / 0.6059 GB, free: 4.688 MB / 446.3 MB
Notification: Performance of simCode: created event and clocks part: time 2.184e-06/0.6706, allocations: 0 / 0.6059 GB, free: 4.688 MB / 446.3 MB
Notification: Performance of simCode: created simulation system equations: time 0.0006869/0.6713, allocations: 463 kB / 0.6064 GB, free: 4.492 MB / 446.3 MB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0007594/0.672, allocations: 175.6 kB / 0.6065 GB, free: 4.398 MB / 446.3 MB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006359/0.6784, allocations: 6.56 MB / 0.6129 GB, free: 15.07 MB / 462.3 MB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005406/0.679, allocations: 0.9386 MB / 0.6139 GB, free: 14.28 MB / 462.3 MB
Notification: Performance of simCode: alias equations: time 0.001499/0.6805, allocations: 386.3 kB / 0.6142 GB, free: 14.09 MB / 462.3 MB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004039/0.6809, allocations: 46.88 kB / 0.6143 GB, free: 14.08 MB / 462.3 MB
Notification: Performance of SimCode: time 1.012e-06/0.6809, allocations: 0 / 0.6143 GB, free: 14.08 MB / 462.3 MB
Notification: Performance of Templates: time 0.01864/0.6995, allocations: 11.39 MB / 0.6254 GB, free: 5.742 MB / 462.3 MB
make -j1 -f ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.makefile
(rm -f ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.pipe ; mkfifo ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.pipe ; head -c 1048576 < ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.pipe >> ../files/ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.sim & ./ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80  -abortSlowSimulation -alarm=300  -emit_protected -lv LOG_STATS > ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.pipe 2>&1)
diffSimulationResults("ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80_res.mat","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/ReferenceFiles/ScalableTestSuite/ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80_res.mat","../files/ScalableTestSuite_ScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTT_FD_N_80.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001)
Reference file matches