./Ultimate.py --spec ../sv-benchmarks/c/properties/no-data-race.prp --file ../sv-benchmarks/c/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.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 649d1c1aa65cb6010503451d39379fb2c9cafcc7e0f5f23661f58b5d14c46288 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 12:18:49,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 12:18:49,763 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-11-12 12:18:49,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 12:18:49,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 12:18:49,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 12:18:49,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 12:18:49,803 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 12:18:49,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 12:18:49,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 12:18:49,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 12:18:49,805 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 12:18:49,806 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 12:18:49,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 12:18:49,806 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 12:18:49,807 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 12:18:49,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 12:18:49,807 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 12:18:49,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 12:18:49,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 12:18:49,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 12:18:49,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 12:18:49,809 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-12 12:18:49,810 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 12:18:49,810 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 12:18:49,810 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 12:18:49,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 12:18:49,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 12:18:49,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 12:18:49,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 12:18:49,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 12:18:49,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 12:18:49,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 12:18:49,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 12:18:49,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 12:18:49,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 12:18:49,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 12:18:49,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 12:18:49,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 12:18:49,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 12:18:49,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 12:18:49,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 649d1c1aa65cb6010503451d39379fb2c9cafcc7e0f5f23661f58b5d14c46288 [2024-11-12 12:18:50,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 12:18:50,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 12:18:50,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 12:18:50,091 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 12:18:50,091 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 12:18:50,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-11-12 12:18:51,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 12:18:51,782 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 12:18:51,783 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-11-12 12:18:51,804 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6429238d7/6970be175e4d4f458830b878ffeb90a5/FLAGa1c1c422e [2024-11-12 12:18:51,818 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6429238d7/6970be175e4d4f458830b878ffeb90a5 [2024-11-12 12:18:51,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 12:18:51,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 12:18:51,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 12:18:51,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 12:18:51,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 12:18:51,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:18:51" (1/1) ... [2024-11-12 12:18:51,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36990b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:51, skipping insertion in model container [2024-11-12 12:18:51,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:18:51" (1/1) ... [2024-11-12 12:18:51,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 12:18:52,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 12:18:52,393 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 12:18:52,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 12:18:52,552 INFO L204 MainTranslator]: Completed translation [2024-11-12 12:18:52,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52 WrapperNode [2024-11-12 12:18:52,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 12:18:52,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 12:18:52,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 12:18:52,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 12:18:52,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,632 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 495 [2024-11-12 12:18:52,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 12:18:52,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 12:18:52,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 12:18:52,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 12:18:52,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 12:18:52,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 12:18:52,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 12:18:52,698 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 12:18:52,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (1/1) ... [2024-11-12 12:18:52,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 12:18:52,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 12:18:52,741 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) [2024-11-12 12:18:52,743 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 [2024-11-12 12:18:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 12:18:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 12:18:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-11-12 12:18:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-11-12 12:18:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-11-12 12:18:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-11-12 12:18:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-11-12 12:18:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-11-12 12:18:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-11-12 12:18:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-11-12 12:18:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-12 12:18:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 12:18:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 12:18:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 12:18:52,783 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 12:18:52,965 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 12:18:52,967 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 12:18:54,335 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 12:18:54,336 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 12:18:58,766 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 12:18:58,767 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-12 12:18:58,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:18:58 BoogieIcfgContainer [2024-11-12 12:18:58,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 12:18:58,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 12:18:58,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 12:18:58,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 12:18:58,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:18:51" (1/3) ... [2024-11-12 12:18:58,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b63785a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:18:58, skipping insertion in model container [2024-11-12 12:18:58,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:18:52" (2/3) ... [2024-11-12 12:18:58,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b63785a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:18:58, skipping insertion in model container [2024-11-12 12:18:58,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:18:58" (3/3) ... [2024-11-12 12:18:58,779 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.oepc_pso.oepc_rmo.oepc.i [2024-11-12 12:18:58,798 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 12:18:58,799 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 278 error locations. [2024-11-12 12:18:58,800 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 12:18:59,310 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 12:18:59,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 406 transitions, 828 flow [2024-11-12 12:18:59,634 INFO L124 PetriNetUnfolderBase]: 3/402 cut-off events. [2024-11-12 12:18:59,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 12:18:59,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 402 events. 3/402 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 2215 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 367. Up to 2 conditions per place. [2024-11-12 12:18:59,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 406 transitions, 828 flow [2024-11-12 12:18:59,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 412 places, 402 transitions, 816 flow [2024-11-12 12:18:59,721 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 12:18:59,731 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;@612da8dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 12:18:59,731 INFO L334 AbstractCegarLoop]: Starting to check reachability of 523 error locations. [2024-11-12 12:18:59,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 12:18:59,743 INFO L124 PetriNetUnfolderBase]: 0/44 cut-off events. [2024-11-12 12:18:59,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 12:18:59,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 12:18:59,746 INFO L206 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] [2024-11-12 12:18:59,747 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 519 more)] === [2024-11-12 12:18:59,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:18:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1921306211, now seen corresponding path program 1 times [2024-11-12 12:18:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:18:59,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920322848] [2024-11-12 12:18:59,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:18:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:18:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:19:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 12:19:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:19:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920322848] [2024-11-12 12:19:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920322848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 12:19:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 12:19:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 12:19:00,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881427760] [2024-11-12 12:19:00,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 12:19:00,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-12 12:19:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:19:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-12 12:19:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-12 12:19:00,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 406 [2024-11-12 12:19:00,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 402 transitions, 816 flow. Second operand has 2 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 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) [2024-11-12 12:19:00,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 12:19:00,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 406 [2024-11-12 12:19:00,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 12:19:10,833 INFO L124 PetriNetUnfolderBase]: 7720/21537 cut-off events. [2024-11-12 12:19:10,834 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-12 12:19:10,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32230 conditions, 21537 events. 7720/21537 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 258400 event pairs, 7720 based on Foata normal form. 1819/21917 useless extension candidates. Maximal degree in co-relation 32180. Up to 10376 conditions per place. [2024-11-12 12:19:11,038 INFO L140 encePairwiseOnDemand]: 127/406 looper letters, 23 selfloop transitions, 0 changer transitions 0/121 dead transitions. [2024-11-12 12:19:11,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 121 transitions, 300 flow [2024-11-12 12:19:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-12 12:19:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-12 12:19:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 508 transitions. [2024-11-12 12:19:11,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625615763546798 [2024-11-12 12:19:11,062 INFO L175 Difference]: Start difference. First operand has 412 places, 402 transitions, 816 flow. Second operand 2 states and 508 transitions. [2024-11-12 12:19:11,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 121 transitions, 300 flow [2024-11-12 12:19:11,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 121 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 12:19:11,070 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 250 flow [2024-11-12 12:19:11,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=250, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2024-11-12 12:19:11,079 INFO L279 CegarLoopForPetriNet]: 412 programPoint places, -281 predicate places. [2024-11-12 12:19:11,079 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 250 flow [2024-11-12 12:19:11,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 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) [2024-11-12 12:19:11,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 12:19:11,080 INFO L206 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] [2024-11-12 12:19:11,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 12:19:11,081 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 519 more)] === [2024-11-12 12:19:11,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:19:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2058058764, now seen corresponding path program 1 times [2024-11-12 12:19:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:19:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38405966] [2024-11-12 12:19:11,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:19:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:19:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:19:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 12:19:11,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:19:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38405966] [2024-11-12 12:19:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38405966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 12:19:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 12:19:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 12:19:11,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744497515] [2024-11-12 12:19:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 12:19:11,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 12:19:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:19:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 12:19:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 12:19:11,267 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 406 [2024-11-12 12:19:11,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2024-11-12 12:19:11,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 12:19:11,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 406 [2024-11-12 12:19:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 12:19:23,052 INFO L124 PetriNetUnfolderBase]: 11720/30840 cut-off events. [2024-11-12 12:19:23,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 12:19:23,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46780 conditions, 30840 events. 11720/30840 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 362036 event pairs, 3720 based on Foata normal form. 0/28913 useless extension candidates. Maximal degree in co-relation 46777. Up to 10500 conditions per place. [2024-11-12 12:19:23,307 INFO L140 encePairwiseOnDemand]: 404/406 looper letters, 40 selfloop transitions, 1 changer transitions 0/136 dead transitions. [2024-11-12 12:19:23,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 362 flow [2024-11-12 12:19:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 12:19:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 12:19:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2024-11-12 12:19:23,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28078817733990147 [2024-11-12 12:19:23,310 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 250 flow. Second operand 3 states and 342 transitions. [2024-11-12 12:19:23,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 362 flow [2024-11-12 12:19:23,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 12:19:23,314 INFO L231 Difference]: Finished difference. Result has 132 places, 120 transitions, 250 flow [2024-11-12 12:19:23,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=132, PETRI_TRANSITIONS=120} [2024-11-12 12:19:23,315 INFO L279 CegarLoopForPetriNet]: 412 programPoint places, -280 predicate places. [2024-11-12 12:19:23,315 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 120 transitions, 250 flow [2024-11-12 12:19:23,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2024-11-12 12:19:23,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 12:19:23,316 INFO L206 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] [2024-11-12 12:19:23,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 12:19:23,317 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 519 more)] === [2024-11-12 12:19:23,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:19:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1313845579, now seen corresponding path program 1 times [2024-11-12 12:19:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:19:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76502241] [2024-11-12 12:19:23,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:19:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:19:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:19:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 12:19:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:19:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76502241] [2024-11-12 12:19:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76502241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 12:19:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 12:19:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 12:19:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32700511] [2024-11-12 12:19:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 12:19:23,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 12:19:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:19:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 12:19:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 12:19:23,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 406 [2024-11-12 12:19:23,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 120 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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) [2024-11-12 12:19:23,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 12:19:23,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 406 [2024-11-12 12:19:23,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand