./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-data-race.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix037_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix037_tso.oepc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 526eb61a43a151355b0c30c3cdf9498dba5b0f807210313241440694b1deb106 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 09:38:37,366 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 09:38:37,424 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-10-13 09:38:37,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 09:38:37,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 09:38:37,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 09:38:37,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 09:38:37,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 09:38:37,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 09:38:37,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 09:38:37,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 09:38:37,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 09:38:37,464 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 09:38:37,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 09:38:37,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 09:38:37,466 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 09:38:37,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 09:38:37,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 09:38:37,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 09:38:37,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 09:38:37,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 09:38:37,468 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 09:38:37,468 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-10-13 09:38:37,469 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 09:38:37,469 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 09:38:37,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 09:38:37,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 09:38:37,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 09:38:37,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 09:38:37,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 09:38:37,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 09:38:37,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 09:38:37,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 09:38:37,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 09:38:37,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 09:38:37,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 09:38:37,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 09:38:37,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 09:38:37,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 09:38:37,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 09:38:37,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 09:38:37,473 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 526eb61a43a151355b0c30c3cdf9498dba5b0f807210313241440694b1deb106 [2024-10-13 09:38:37,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 09:38:37,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 09:38:37,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 09:38:37,697 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 09:38:37,698 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 09:38:37,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix037_tso.oepc.i [2024-10-13 09:38:38,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 09:38:39,201 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 09:38:39,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix037_tso.oepc.i [2024-10-13 09:38:39,218 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad9aaceeb/dea195b72e1242088aedf1271befdaef/FLAG9bf0c0dc2 [2024-10-13 09:38:39,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad9aaceeb/dea195b72e1242088aedf1271befdaef [2024-10-13 09:38:39,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 09:38:39,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 09:38:39,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 09:38:39,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 09:38:39,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 09:38:39,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fa4325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39, skipping insertion in model container [2024-10-13 09:38:39,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,288 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 09:38:39,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 09:38:39,637 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 09:38:39,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 09:38:39,740 INFO L204 MainTranslator]: Completed translation [2024-10-13 09:38:39,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39 WrapperNode [2024-10-13 09:38:39,741 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 09:38:39,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 09:38:39,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 09:38:39,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 09:38:39,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,814 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 956 [2024-10-13 09:38:39,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 09:38:39,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 09:38:39,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 09:38:39,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 09:38:39,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,828 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 09:38:39,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 09:38:39,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 09:38:39,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 09:38:39,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (1/1) ... [2024-10-13 09:38:39,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 09:38:39,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 09:38:39,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 09:38:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 09:38:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 09:38:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 09:38:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-10-13 09:38:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-10-13 09:38:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-10-13 09:38:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-10-13 09:38:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-10-13 09:38:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-10-13 09:38:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-10-13 09:38:39,966 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-10-13 09:38:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-10-13 09:38:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 09:38:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 09:38:39,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 09:38:39,968 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 09:38:40,122 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 09:38:40,124 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 09:38:41,274 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 09:38:41,275 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 09:38:45,030 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 09:38:45,031 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-13 09:38:45,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:45 BoogieIcfgContainer [2024-10-13 09:38:45,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 09:38:45,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 09:38:45,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 09:38:45,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 09:38:45,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:38:39" (1/3) ... [2024-10-13 09:38:45,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589ec670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:45, skipping insertion in model container [2024-10-13 09:38:45,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:39" (2/3) ... [2024-10-13 09:38:45,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589ec670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:45, skipping insertion in model container [2024-10-13 09:38:45,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:45" (3/3) ... [2024-10-13 09:38:45,038 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037_tso.oepc.i [2024-10-13 09:38:45,053 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 09:38:45,054 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 284 error locations. [2024-10-13 09:38:45,055 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 09:38:45,220 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 09:38:45,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 428 places, 418 transitions, 852 flow [2024-10-13 09:38:45,417 INFO L124 PetriNetUnfolderBase]: 3/414 cut-off events. [2024-10-13 09:38:45,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 09:38:45,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 414 events. 3/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 2204 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 375. Up to 2 conditions per place. [2024-10-13 09:38:45,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 428 places, 418 transitions, 852 flow [2024-10-13 09:38:45,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 414 transitions, 840 flow [2024-10-13 09:38:45,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 09:38:45,479 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@480afe0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 09:38:45,480 INFO L334 AbstractCegarLoop]: Starting to check reachability of 440 error locations. [2024-10-13 09:38:45,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 09:38:45,490 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-10-13 09:38:45,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 09:38:45,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 09:38:45,491 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 09:38:45,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 436 more)] === [2024-10-13 09:38:45,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 09:38:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1981990350, now seen corresponding path program 1 times [2024-10-13 09:38:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 09:38:45,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285129910] [2024-10-13 09:38:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 09:38:45,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 09:38:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 09:38:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 09:38:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 09:38:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285129910] [2024-10-13 09:38:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285129910] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 09:38:45,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 09:38:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 09:38:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992407626] [2024-10-13 09:38:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 09:38:45,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 09:38:45,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 09:38:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 09:38:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 09:38:45,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 418 [2024-10-13 09:38:45,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 414 transitions, 840 flow. Second operand has 2 states, 2 states have (on average 108.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 09:38:45,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 09:38:45,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 418 [2024-10-13 09:38:45,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 09:39:00,410 INFO L124 PetriNetUnfolderBase]: 10870/29691 cut-off events. [2024-10-13 09:39:00,410 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-13 09:39:00,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44534 conditions, 29691 events. 10870/29691 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 369661 event pairs, 10870 based on Foata normal form. 2568/30315 useless extension candidates. Maximal degree in co-relation 44480. Up to 14526 conditions per place. [2024-10-13 09:39:00,601 INFO L140 encePairwiseOnDemand]: 133/418 looper letters, 25 selfloop transitions, 0 changer transitions 0/127 dead transitions. [2024-10-13 09:39:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 127 transitions, 316 flow [2024-10-13 09:39:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 09:39:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 09:39:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 524 transitions. [2024-10-13 09:39:00,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6267942583732058 [2024-10-13 09:39:00,618 INFO L175 Difference]: Start difference. First operand has 424 places, 414 transitions, 840 flow. Second operand 2 states and 524 transitions. [2024-10-13 09:39:00,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 127 transitions, 316 flow [2024-10-13 09:39:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 127 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 09:39:00,627 INFO L231 Difference]: Finished difference. Result has 137 places, 127 transitions, 262 flow [2024-10-13 09:39:00,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=262, PETRI_PLACES=137, PETRI_TRANSITIONS=127} [2024-10-13 09:39:00,632 INFO L277 CegarLoopForPetriNet]: 424 programPoint places, -287 predicate places. [2024-10-13 09:39:00,635 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 127 transitions, 262 flow [2024-10-13 09:39:00,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 09:39:00,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 09:39:00,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 09:39:00,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 09:39:00,637 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 436 more)] === [2024-10-13 09:39:00,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 09:39:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash 288899432, now seen corresponding path program 1 times [2024-10-13 09:39:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 09:39:00,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87164330] [2024-10-13 09:39:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 09:39:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 09:39:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 09:39:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 09:39:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 09:39:00,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87164330] [2024-10-13 09:39:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87164330] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 09:39:00,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 09:39:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 09:39:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878818764] [2024-10-13 09:39:00,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 09:39:00,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 09:39:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 09:39:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 09:39:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 09:39:00,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 418 [2024-10-13 09:39:00,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 127 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 09:39:00,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 09:39:00,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 418 [2024-10-13 09:39:00,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 09:39:14,113 INFO L124 PetriNetUnfolderBase]: 16570/42944 cut-off events. [2024-10-13 09:39:14,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 09:39:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65234 conditions, 42944 events. 16570/42944 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 521841 event pairs, 5170 based on Foata normal form. 0/40267 useless extension candidates. Maximal degree in co-relation 65231. Up to 14900 conditions per place. [2024-10-13 09:39:14,335 INFO L140 encePairwiseOnDemand]: 416/418 looper letters, 44 selfloop transitions, 1 changer transitions 0/144 dead transitions. [2024-10-13 09:39:14,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 386 flow [2024-10-13 09:39:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 09:39:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 09:39:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2024-10-13 09:39:14,342 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28548644338118023 [2024-10-13 09:39:14,343 INFO L175 Difference]: Start difference. First operand has 137 places, 127 transitions, 262 flow. Second operand 3 states and 358 transitions. [2024-10-13 09:39:14,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 386 flow [2024-10-13 09:39:14,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 144 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 09:39:14,347 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 262 flow [2024-10-13 09:39:14,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2024-10-13 09:39:14,348 INFO L277 CegarLoopForPetriNet]: 424 programPoint places, -286 predicate places. [2024-10-13 09:39:14,348 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 262 flow [2024-10-13 09:39:14,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 09:39:14,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 09:39:14,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 09:39:14,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 09:39:14,349 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr131ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 436 more)] === [2024-10-13 09:39:14,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 09:39:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2055958939, now seen corresponding path program 1 times [2024-10-13 09:39:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 09:39:14,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257721696] [2024-10-13 09:39:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 09:39:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 09:39:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 09:39:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 09:39:14,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 09:39:14,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257721696] [2024-10-13 09:39:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257721696] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 09:39:14,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 09:39:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 09:39:14,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843506143] [2024-10-13 09:39:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 09:39:14,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 09:39:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 09:39:14,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 09:39:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 09:39:14,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 418 [2024-10-13 09:39:14,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 09:39:14,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 09:39:14,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 418 [2024-10-13 09:39:14,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand