/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 18:39:56,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 18:39:56,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 18:39:56,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 18:39:56,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 18:39:56,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 18:39:56,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 18:39:56,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 18:39:56,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 18:39:56,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 18:39:56,270 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 18:39:56,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 18:39:56,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 18:39:56,272 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 18:39:56,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 18:39:56,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 18:39:56,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 18:39:56,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 18:39:56,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 18:39:56,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 18:39:56,273 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 18:39:56,274 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 18:39:56,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 18:39:56,275 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 18:39:56,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 18:39:56,275 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 18:39:56,275 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 18:39:56,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 18:39:56,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 18:39:56,276 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 18:39:56,277 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 18:39:56,277 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 18:39:56,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 18:39:56,277 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 18:39:56,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 18:39:56,278 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-24 18:39:56,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 18:39:56,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 18:39:56,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 18:39:56,590 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 18:39:56,592 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 18:39:56,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-24 18:39:57,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 18:39:58,102 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 18:39:58,103 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-24 18:39:58,116 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e271dbb23/aae2a7af3ab7422aa79edc0fe6cf8e6d/FLAG0b63e6bb4 [2023-08-24 18:39:58,127 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e271dbb23/aae2a7af3ab7422aa79edc0fe6cf8e6d [2023-08-24 18:39:58,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 18:39:58,130 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 18:39:58,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 18:39:58,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 18:39:58,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 18:39:58,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76285f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58, skipping insertion in model container [2023-08-24 18:39:58,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,171 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 18:39:58,343 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 18:39:58,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 18:39:58,500 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 18:39:58,521 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 18:39:58,533 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-24 18:39:58,534 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-24 18:39:58,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 18:39:58,575 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 18:39:58,575 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 18:39:58,576 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 18:39:58,581 INFO L206 MainTranslator]: Completed translation [2023-08-24 18:39:58,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58 WrapperNode [2023-08-24 18:39:58,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 18:39:58,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 18:39:58,583 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 18:39:58,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 18:39:58,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,636 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-08-24 18:39:58,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 18:39:58,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 18:39:58,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 18:39:58,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 18:39:58,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 18:39:58,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 18:39:58,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 18:39:58,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 18:39:58,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (1/1) ... [2023-08-24 18:39:58,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 18:39:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 18:39:58,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 18:39:58,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 18:39:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-24 18:39:58,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-24 18:39:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 18:39:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 18:39:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 18:39:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 18:39:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 18:39:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 18:39:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 18:39:58,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 18:39:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 18:39:58,747 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 18:39:58,842 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 18:39:58,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 18:39:58,937 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 18:39:59,012 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 18:39:59,013 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-24 18:39:59,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:39:59 BoogieIcfgContainer [2023-08-24 18:39:59,015 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 18:39:59,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 18:39:59,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 18:39:59,020 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 18:39:59,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:39:58" (1/3) ... [2023-08-24 18:39:59,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2f5bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:39:59, skipping insertion in model container [2023-08-24 18:39:59,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:39:58" (2/3) ... [2023-08-24 18:39:59,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2f5bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:39:59, skipping insertion in model container [2023-08-24 18:39:59,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:39:59" (3/3) ... [2023-08-24 18:39:59,022 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-08-24 18:39:59,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 18:39:59,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-24 18:39:59,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 18:39:59,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:39:59,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,187 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-24 18:39:59,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:39:59,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-08-24 18:39:59,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:39:59,203 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 81 flow [2023-08-24 18:39:59,233 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-24 18:39:59,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:39:59,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-08-24 18:39:59,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-08-24 18:40:00,600 INFO L134 LiptonReduction]: Checked pairs total: 297 [2023-08-24 18:40:00,600 INFO L136 LiptonReduction]: Total number of compositions: 34 [2023-08-24 18:40:00,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:00,624 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:00,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-24 18:40:00,627 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:00,627 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-24 18:40:00,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:00,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:00,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:00,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 9 more)] === [2023-08-24 18:40:00,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 7472706, now seen corresponding path program 1 times [2023-08-24 18:40:00,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:00,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754235819] [2023-08-24 18:40:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:00,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754235819] [2023-08-24 18:40:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754235819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:00,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:00,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132278812] [2023-08-24 18:40:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:00,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 18:40:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 18:40:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 18:40:00,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-08-24 18:40:00,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 13 transitions, 31 flow. Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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) [2023-08-24 18:40:00,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:00,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-08-24 18:40:00,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:00,821 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-24 18:40:00,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:00,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 25 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 24. Up to 16 conditions per place. [2023-08-24 18:40:00,823 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 6 selfloop transitions, 0 changer transitions 0/7 dead transitions. [2023-08-24 18:40:00,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 7 transitions, 31 flow [2023-08-24 18:40:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 18:40:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 18:40:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 64 transitions. [2023-08-24 18:40:00,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-24 18:40:00,834 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 64 transitions. [2023-08-24 18:40:00,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 64 transitions. [2023-08-24 18:40:00,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:00,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 64 transitions. [2023-08-24 18:40:00,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 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) [2023-08-24 18:40:00,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2023-08-24 18:40:00,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2023-08-24 18:40:00,842 INFO L175 Difference]: Start difference. First operand has 16 places, 13 transitions, 31 flow. Second operand 2 states and 64 transitions. [2023-08-24 18:40:00,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 7 transitions, 31 flow [2023-08-24 18:40:00,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:00,845 INFO L231 Difference]: Finished difference. Result has 11 places, 7 transitions, 19 flow [2023-08-24 18:40:00,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=19, PETRI_PLACES=11, PETRI_TRANSITIONS=7} [2023-08-24 18:40:00,850 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -5 predicate places. [2023-08-24 18:40:00,850 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 7 transitions, 19 flow [2023-08-24 18:40:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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) [2023-08-24 18:40:00,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:00,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:00,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 18:40:00,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 9 more)] === [2023-08-24 18:40:00,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash 7472708, now seen corresponding path program 1 times [2023-08-24 18:40:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:00,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606621965] [2023-08-24 18:40:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:00,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:00,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606621965] [2023-08-24 18:40:00,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606621965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:00,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:00,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840825141] [2023-08-24 18:40:00,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:00,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:00,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-08-24 18:40:00,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 7 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-08-24 18:40:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:00,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-08-24 18:40:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:00,993 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-24 18:40:00,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 24. Up to 6 conditions per place. [2023-08-24 18:40:00,994 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-08-24 18:40:00,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2023-08-24 18:40:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-08-24 18:40:01,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38425925925925924 [2023-08-24 18:40:01,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-08-24 18:40:01,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-08-24 18:40:01,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:01,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-08-24 18:40:01,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-08-24 18:40:01,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2023-08-24 18:40:01,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2023-08-24 18:40:01,005 INFO L175 Difference]: Start difference. First operand has 11 places, 7 transitions, 19 flow. Second operand 3 states and 83 transitions. [2023-08-24 18:40:01,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2023-08-24 18:40:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:01,006 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 21 flow [2023-08-24 18:40:01,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-24 18:40:01,008 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -4 predicate places. [2023-08-24 18:40:01,008 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 21 flow [2023-08-24 18:40:01,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-08-24 18:40:01,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:01,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 18:40:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 18:40:01,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 9 more)] === [2023-08-24 18:40:01,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1408647952, now seen corresponding path program 1 times [2023-08-24 18:40:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418909680] [2023-08-24 18:40:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:01,029 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:01,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:01,051 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:01,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-08-24 18:40:01,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 13 remaining) [2023-08-24 18:40:01,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 13 remaining) [2023-08-24 18:40:01,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 13 remaining) [2023-08-24 18:40:01,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 13 remaining) [2023-08-24 18:40:01,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 13 remaining) [2023-08-24 18:40:01,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 13 remaining) [2023-08-24 18:40:01,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 13 remaining) [2023-08-24 18:40:01,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 13 remaining) [2023-08-24 18:40:01,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 13 remaining) [2023-08-24 18:40:01,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 13 remaining) [2023-08-24 18:40:01,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 13 remaining) [2023-08-24 18:40:01,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 13 remaining) [2023-08-24 18:40:01,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 18:40:01,056 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 18:40:01,058 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:01,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 18:40:01,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:01,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,096 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-24 18:40:01,096 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 18:40:01,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-08-24 18:40:01,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,097 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:01,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 114 flow [2023-08-24 18:40:01,108 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-24 18:40:01,108 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 18:40:01,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-08-24 18:40:01,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-24 18:40:02,348 INFO L134 LiptonReduction]: Checked pairs total: 2823 [2023-08-24 18:40:02,349 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-24 18:40:02,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:02,351 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:02,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-24 18:40:02,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:02,353 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-24 18:40:02,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:02,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:02,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:02,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-08-24 18:40:02,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash 10428970, now seen corresponding path program 1 times [2023-08-24 18:40:02,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:02,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246740973] [2023-08-24 18:40:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:02,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246740973] [2023-08-24 18:40:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246740973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:02,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:02,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19016881] [2023-08-24 18:40:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:02,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 18:40:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 18:40:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 18:40:02,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 83 [2023-08-24 18:40:02,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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) [2023-08-24 18:40:02,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:02,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 83 [2023-08-24 18:40:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:02,409 INFO L124 PetriNetUnfolderBase]: 64/143 cut-off events. [2023-08-24 18:40:02,409 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-24 18:40:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 143 events. 64/143 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 581 event pairs, 64 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 68. Up to 127 conditions per place. [2023-08-24 18:40:02,411 INFO L140 encePairwiseOnDemand]: 72/83 looper letters, 12 selfloop transitions, 0 changer transitions 0/15 dead transitions. [2023-08-24 18:40:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-24 18:40:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 18:40:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 18:40:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 81 transitions. [2023-08-24 18:40:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879518072289157 [2023-08-24 18:40:02,412 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 81 transitions. [2023-08-24 18:40:02,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 81 transitions. [2023-08-24 18:40:02,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:02,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 81 transitions. [2023-08-24 18:40:02,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 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) [2023-08-24 18:40:02,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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) [2023-08-24 18:40:02,414 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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) [2023-08-24 18:40:02,414 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 81 transitions. [2023-08-24 18:40:02,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-24 18:40:02,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:02,415 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 40 flow [2023-08-24 18:40:02,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-24 18:40:02,416 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -10 predicate places. [2023-08-24 18:40:02,416 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 40 flow [2023-08-24 18:40:02,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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) [2023-08-24 18:40:02,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:02,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:02,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 18:40:02,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-08-24 18:40:02,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 10428967, now seen corresponding path program 1 times [2023-08-24 18:40:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966173993] [2023-08-24 18:40:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966173993] [2023-08-24 18:40:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966173993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:02,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529710256] [2023-08-24 18:40:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:02,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 83 [2023-08-24 18:40:02,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-08-24 18:40:02,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:02,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 83 [2023-08-24 18:40:02,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:02,527 INFO L124 PetriNetUnfolderBase]: 41/98 cut-off events. [2023-08-24 18:40:02,527 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 18:40:02,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 98 events. 41/98 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 363 event pairs, 20 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 202. Up to 46 conditions per place. [2023-08-24 18:40:02,528 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 17 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-24 18:40:02,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 101 flow [2023-08-24 18:40:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2023-08-24 18:40:02,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42570281124497994 [2023-08-24 18:40:02,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 106 transitions. [2023-08-24 18:40:02,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 106 transitions. [2023-08-24 18:40:02,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:02,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 106 transitions. [2023-08-24 18:40:02,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-08-24 18:40:02,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2023-08-24 18:40:02,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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) [2023-08-24 18:40:02,532 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 40 flow. Second operand 3 states and 106 transitions. [2023-08-24 18:40:02,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 101 flow [2023-08-24 18:40:02,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 101 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:02,533 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 61 flow [2023-08-24 18:40:02,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-24 18:40:02,534 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-08-24 18:40:02,534 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 61 flow [2023-08-24 18:40:02,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-08-24 18:40:02,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:02,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 18:40:02,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 18:40:02,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-08-24 18:40:02,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash -699991919, now seen corresponding path program 1 times [2023-08-24 18:40:02,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:02,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234825473] [2023-08-24 18:40:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:02,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:02,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:02,557 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 19 remaining) [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 19 remaining) [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 19 remaining) [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 19 remaining) [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (14 of 19 remaining) [2023-08-24 18:40:02,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (13 of 19 remaining) [2023-08-24 18:40:02,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (12 of 19 remaining) [2023-08-24 18:40:02,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 19 remaining) [2023-08-24 18:40:02,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 19 remaining) [2023-08-24 18:40:02,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 19 remaining) [2023-08-24 18:40:02,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 19 remaining) [2023-08-24 18:40:02,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 19 remaining) [2023-08-24 18:40:02,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 19 remaining) [2023-08-24 18:40:02,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 19 remaining) [2023-08-24 18:40:02,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 19 remaining) [2023-08-24 18:40:02,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 19 remaining) [2023-08-24 18:40:02,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 19 remaining) [2023-08-24 18:40:02,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 19 remaining) [2023-08-24 18:40:02,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 19 remaining) [2023-08-24 18:40:02,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 18:40:02,561 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 18:40:02,562 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:02,562 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 18:40:02,579 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,592 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-24 18:40:02,592 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 18:40:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-08-24 18:40:02,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:02,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-24 18:40:02,605 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-24 18:40:02,605 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 18:40:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-08-24 18:40:02,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-08-24 18:40:04,072 INFO L134 LiptonReduction]: Checked pairs total: 6364 [2023-08-24 18:40:04,072 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-24 18:40:04,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:04,075 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:04,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-24 18:40:04,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:04,076 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-24 18:40:04,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:04,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:04,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:04,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-08-24 18:40:04,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 13968917, now seen corresponding path program 1 times [2023-08-24 18:40:04,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:04,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819833028] [2023-08-24 18:40:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819833028] [2023-08-24 18:40:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819833028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:04,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:04,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:04,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678759187] [2023-08-24 18:40:04,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:04,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:04,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:04,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:04,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 102 [2023-08-24 18:40:04,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-08-24 18:40:04,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:04,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 102 [2023-08-24 18:40:04,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:04,237 INFO L124 PetriNetUnfolderBase]: 349/606 cut-off events. [2023-08-24 18:40:04,237 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-08-24 18:40:04,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 606 events. 349/606 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3036 event pairs, 124 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 213. Up to 382 conditions per place. [2023-08-24 18:40:04,245 INFO L140 encePairwiseOnDemand]: 79/102 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-24 18:40:04,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 155 flow [2023-08-24 18:40:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-24 18:40:04,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130718954248366 [2023-08-24 18:40:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-24 18:40:04,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-24 18:40:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-24 18:40:04,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2023-08-24 18:40:04,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-24 18:40:04,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-24 18:40:04,250 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 93 flow. Second operand 3 states and 157 transitions. [2023-08-24 18:40:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 155 flow [2023-08-24 18:40:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 147 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:04,252 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 85 flow [2023-08-24 18:40:04,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-24 18:40:04,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -13 predicate places. [2023-08-24 18:40:04,253 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 85 flow [2023-08-24 18:40:04,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2023-08-24 18:40:04,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:04,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 18:40:04,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-08-24 18:40:04,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1719899717, now seen corresponding path program 1 times [2023-08-24 18:40:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612013332] [2023-08-24 18:40:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:04,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 18:40:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612013332] [2023-08-24 18:40:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612013332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:04,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:04,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 18:40:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952494208] [2023-08-24 18:40:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:04,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 102 [2023-08-24 18:40:04,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-08-24 18:40:04,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:04,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 102 [2023-08-24 18:40:04,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:04,367 INFO L124 PetriNetUnfolderBase]: 279/467 cut-off events. [2023-08-24 18:40:04,367 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-24 18:40:04,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 467 events. 279/467 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2044 event pairs, 57 based on Foata normal form. 46/505 useless extension candidates. Maximal degree in co-relation 820. Up to 392 conditions per place. [2023-08-24 18:40:04,371 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-08-24 18:40:04,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 153 flow [2023-08-24 18:40:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-08-24 18:40:04,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-24 18:40:04,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-08-24 18:40:04,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-08-24 18:40:04,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:04,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-08-24 18:40:04,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-08-24 18:40:04,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-24 18:40:04,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-24 18:40:04,374 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 85 flow. Second operand 3 states and 119 transitions. [2023-08-24 18:40:04,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 153 flow [2023-08-24 18:40:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 18:40:04,376 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 90 flow [2023-08-24 18:40:04,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-24 18:40:04,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -14 predicate places. [2023-08-24 18:40:04,377 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 90 flow [2023-08-24 18:40:04,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-08-24 18:40:04,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:04,377 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 18:40:04,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 18:40:04,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-08-24 18:40:04,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash -42004698, now seen corresponding path program 1 times [2023-08-24 18:40:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:04,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087462107] [2023-08-24 18:40:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:04,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:04,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:04,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:04,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-08-24 18:40:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 25 remaining) [2023-08-24 18:40:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 25 remaining) [2023-08-24 18:40:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (21 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 25 remaining) [2023-08-24 18:40:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (14 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (13 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (12 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 25 remaining) [2023-08-24 18:40:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 25 remaining) [2023-08-24 18:40:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 25 remaining) [2023-08-24 18:40:04,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 25 remaining) [2023-08-24 18:40:04,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 25 remaining) [2023-08-24 18:40:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 18:40:04,404 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 18:40:04,405 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:04,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 18:40:04,429 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:04,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,448 INFO L124 PetriNetUnfolderBase]: 5/123 cut-off events. [2023-08-24 18:40:04,448 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 18:40:04,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 5/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-24 18:40:04,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:04,450 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 186 flow [2023-08-24 18:40:04,465 INFO L124 PetriNetUnfolderBase]: 5/123 cut-off events. [2023-08-24 18:40:04,465 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 18:40:04,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 5/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-24 18:40:04,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-08-24 18:40:06,236 INFO L134 LiptonReduction]: Checked pairs total: 10952 [2023-08-24 18:40:06,236 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-24 18:40:06,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:06,238 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:06,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-24 18:40:06,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:06,240 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-24 18:40:06,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:06,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:06,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:06,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-08-24 18:40:06,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 18093751, now seen corresponding path program 1 times [2023-08-24 18:40:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:06,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703551015] [2023-08-24 18:40:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:06,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:06,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703551015] [2023-08-24 18:40:06,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703551015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:06,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:06,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778762988] [2023-08-24 18:40:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:06,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 18:40:06,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 18:40:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 18:40:06,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 121 [2023-08-24 18:40:06,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-08-24 18:40:06,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:06,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 121 [2023-08-24 18:40:06,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:06,828 INFO L124 PetriNetUnfolderBase]: 4064/6063 cut-off events. [2023-08-24 18:40:06,828 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-24 18:40:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12937 conditions, 6063 events. 4064/6063 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34776 event pairs, 4064 based on Foata normal form. 0/4579 useless extension candidates. Maximal degree in co-relation 2087. Up to 5627 conditions per place. [2023-08-24 18:40:06,873 INFO L140 encePairwiseOnDemand]: 100/121 looper letters, 22 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-24 18:40:06,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 126 flow [2023-08-24 18:40:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 18:40:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 18:40:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 113 transitions. [2023-08-24 18:40:06,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2023-08-24 18:40:06,874 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 113 transitions. [2023-08-24 18:40:06,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 113 transitions. [2023-08-24 18:40:06,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:06,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 113 transitions. [2023-08-24 18:40:06,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 56.5) internal successors, (113), 2 states have internal predecessors, (113), 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) [2023-08-24 18:40:06,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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) [2023-08-24 18:40:06,876 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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) [2023-08-24 18:40:06,876 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 124 flow. Second operand 2 states and 113 transitions. [2023-08-24 18:40:06,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 126 flow [2023-08-24 18:40:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 114 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:06,880 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 70 flow [2023-08-24 18:40:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-24 18:40:06,881 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -20 predicate places. [2023-08-24 18:40:06,881 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 70 flow [2023-08-24 18:40:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-08-24 18:40:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 18:40:06,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-08-24 18:40:06,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash 18093753, now seen corresponding path program 1 times [2023-08-24 18:40:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263124420] [2023-08-24 18:40:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:06,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263124420] [2023-08-24 18:40:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263124420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:06,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:06,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166791876] [2023-08-24 18:40:06,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:06,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 121 [2023-08-24 18:40:06,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-08-24 18:40:06,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:06,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 121 [2023-08-24 18:40:06,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:07,252 INFO L124 PetriNetUnfolderBase]: 2587/3816 cut-off events. [2023-08-24 18:40:07,252 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-08-24 18:40:07,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7891 conditions, 3816 events. 2587/3816 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 21558 event pairs, 730 based on Foata normal form. 0/3221 useless extension candidates. Maximal degree in co-relation 7884. Up to 2980 conditions per place. [2023-08-24 18:40:07,310 INFO L140 encePairwiseOnDemand]: 112/121 looper letters, 33 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-24 18:40:07,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 193 flow [2023-08-24 18:40:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-08-24 18:40:07,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39669421487603307 [2023-08-24 18:40:07,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-08-24 18:40:07,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-08-24 18:40:07,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:07,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-08-24 18:40:07,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-08-24 18:40:07,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2023-08-24 18:40:07,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2023-08-24 18:40:07,314 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 70 flow. Second operand 3 states and 144 transitions. [2023-08-24 18:40:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 193 flow [2023-08-24 18:40:07,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:07,316 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 109 flow [2023-08-24 18:40:07,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-24 18:40:07,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -17 predicate places. [2023-08-24 18:40:07,316 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 109 flow [2023-08-24 18:40:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-08-24 18:40:07,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:07,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:07,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 18:40:07,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-08-24 18:40:07,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1329929123, now seen corresponding path program 1 times [2023-08-24 18:40:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:07,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456158339] [2023-08-24 18:40:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 18:40:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456158339] [2023-08-24 18:40:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456158339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:07,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:07,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 18:40:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641801249] [2023-08-24 18:40:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:07,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:07,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:07,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 121 [2023-08-24 18:40:07,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-08-24 18:40:07,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:07,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 121 [2023-08-24 18:40:07,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:07,612 INFO L124 PetriNetUnfolderBase]: 1623/2343 cut-off events. [2023-08-24 18:40:07,612 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-08-24 18:40:07,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5830 conditions, 2343 events. 1623/2343 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11432 event pairs, 347 based on Foata normal form. 342/2664 useless extension candidates. Maximal degree in co-relation 5821. Up to 2160 conditions per place. [2023-08-24 18:40:07,634 INFO L140 encePairwiseOnDemand]: 113/121 looper letters, 30 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-24 18:40:07,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 200 flow [2023-08-24 18:40:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-08-24 18:40:07,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746556473829201 [2023-08-24 18:40:07,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-08-24 18:40:07,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-08-24 18:40:07,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:07,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-08-24 18:40:07,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-08-24 18:40:07,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2023-08-24 18:40:07,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2023-08-24 18:40:07,638 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 109 flow. Second operand 3 states and 136 transitions. [2023-08-24 18:40:07,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 200 flow [2023-08-24 18:40:07,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 18:40:07,641 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 116 flow [2023-08-24 18:40:07,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-24 18:40:07,642 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -19 predicate places. [2023-08-24 18:40:07,642 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 116 flow [2023-08-24 18:40:07,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-08-24 18:40:07,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:07,642 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 18:40:07,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-08-24 18:40:07,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash -391155039, now seen corresponding path program 1 times [2023-08-24 18:40:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532244803] [2023-08-24 18:40:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:07,663 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:07,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:07,688 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (29 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (28 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (27 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (26 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (25 of 31 remaining) [2023-08-24 18:40:07,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (24 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (21 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 31 remaining) [2023-08-24 18:40:07,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (14 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (13 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (12 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 31 remaining) [2023-08-24 18:40:07,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 31 remaining) [2023-08-24 18:40:07,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 31 remaining) [2023-08-24 18:40:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 18:40:07,691 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 18:40:07,692 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:07,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 18:40:07,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:07,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,749 INFO L124 PetriNetUnfolderBase]: 6/148 cut-off events. [2023-08-24 18:40:07,749 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 18:40:07,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 6/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 290 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-08-24 18:40:07,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:07,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-24 18:40:07,762 INFO L124 PetriNetUnfolderBase]: 6/148 cut-off events. [2023-08-24 18:40:07,762 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 18:40:07,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 6/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 290 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-08-24 18:40:07,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-08-24 18:40:09,913 INFO L134 LiptonReduction]: Checked pairs total: 15540 [2023-08-24 18:40:09,913 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-24 18:40:09,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:09,915 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:09,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-24 18:40:09,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:09,916 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-24 18:40:09,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:09,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:09,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:09,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 33 more)] === [2023-08-24 18:40:09,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash 22804435, now seen corresponding path program 1 times [2023-08-24 18:40:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:09,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923401829] [2023-08-24 18:40:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923401829] [2023-08-24 18:40:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923401829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:09,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:09,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:09,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028073894] [2023-08-24 18:40:09,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:09,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 18:40:09,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 18:40:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 18:40:09,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 140 [2023-08-24 18:40:09,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 157 flow. Second operand has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 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) [2023-08-24 18:40:09,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:09,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 140 [2023-08-24 18:40:09,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:12,699 INFO L124 PetriNetUnfolderBase]: 26564/36563 cut-off events. [2023-08-24 18:40:12,699 INFO L125 PetriNetUnfolderBase]: For 16298/16298 co-relation queries the response was YES. [2023-08-24 18:40:12,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78563 conditions, 36563 events. 26564/36563 cut-off events. For 16298/16298 co-relation queries the response was YES. Maximal size of possible extension queue 1828. Compared 224981 event pairs, 26564 based on Foata normal form. 0/27579 useless extension candidates. Maximal degree in co-relation 13212. Up to 34377 conditions per place. [2023-08-24 18:40:13,023 INFO L140 encePairwiseOnDemand]: 114/140 looper letters, 27 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-08-24 18:40:13,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 159 flow [2023-08-24 18:40:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 18:40:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 18:40:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 129 transitions. [2023-08-24 18:40:13,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2023-08-24 18:40:13,025 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 129 transitions. [2023-08-24 18:40:13,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 129 transitions. [2023-08-24 18:40:13,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:13,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 129 transitions. [2023-08-24 18:40:13,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 64.5) internal successors, (129), 2 states have internal predecessors, (129), 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) [2023-08-24 18:40:13,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2023-08-24 18:40:13,027 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2023-08-24 18:40:13,027 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 157 flow. Second operand 2 states and 129 transitions. [2023-08-24 18:40:13,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 159 flow [2023-08-24 18:40:13,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 139 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:13,048 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 85 flow [2023-08-24 18:40:13,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=85, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-24 18:40:13,050 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -25 predicate places. [2023-08-24 18:40:13,050 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 85 flow [2023-08-24 18:40:13,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.0) internal successors, (80), 2 states have internal predecessors, (80), 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) [2023-08-24 18:40:13,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:13,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 18:40:13,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 33 more)] === [2023-08-24 18:40:13,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 22804433, now seen corresponding path program 1 times [2023-08-24 18:40:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:13,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484682572] [2023-08-24 18:40:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484682572] [2023-08-24 18:40:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484682572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:13,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:13,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835394430] [2023-08-24 18:40:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:13,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:13,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 140 [2023-08-24 18:40:13,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-08-24 18:40:13,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:13,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 140 [2023-08-24 18:40:13,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:14,752 INFO L124 PetriNetUnfolderBase]: 17883/24016 cut-off events. [2023-08-24 18:40:14,752 INFO L125 PetriNetUnfolderBase]: For 1600/1600 co-relation queries the response was YES. [2023-08-24 18:40:14,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49480 conditions, 24016 events. 17883/24016 cut-off events. For 1600/1600 co-relation queries the response was YES. Maximal size of possible extension queue 1594. Compared 142895 event pairs, 4534 based on Foata normal form. 0/19607 useless extension candidates. Maximal degree in co-relation 49472. Up to 21020 conditions per place. [2023-08-24 18:40:14,867 INFO L140 encePairwiseOnDemand]: 129/140 looper letters, 41 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-24 18:40:14,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 239 flow [2023-08-24 18:40:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-08-24 18:40:14,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2023-08-24 18:40:14,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-08-24 18:40:14,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-08-24 18:40:14,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:14,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-08-24 18:40:14,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2023-08-24 18:40:14,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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) [2023-08-24 18:40:14,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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) [2023-08-24 18:40:14,870 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 85 flow. Second operand 3 states and 163 transitions. [2023-08-24 18:40:14,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 239 flow [2023-08-24 18:40:14,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:14,873 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 133 flow [2023-08-24 18:40:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-08-24 18:40:14,873 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -22 predicate places. [2023-08-24 18:40:14,873 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 133 flow [2023-08-24 18:40:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-08-24 18:40:14,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:14,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 18:40:14,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 33 more)] === [2023-08-24 18:40:14,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash -300393216, now seen corresponding path program 1 times [2023-08-24 18:40:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:14,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006017928] [2023-08-24 18:40:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 18:40:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006017928] [2023-08-24 18:40:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006017928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:14,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 18:40:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413583532] [2023-08-24 18:40:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:14,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 140 [2023-08-24 18:40:14,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-08-24 18:40:14,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:14,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 140 [2023-08-24 18:40:14,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:15,724 INFO L124 PetriNetUnfolderBase]: 8535/11343 cut-off events. [2023-08-24 18:40:15,724 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2023-08-24 18:40:15,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27937 conditions, 11343 events. 8535/11343 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57676 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 27927. Up to 10912 conditions per place. [2023-08-24 18:40:15,770 INFO L140 encePairwiseOnDemand]: 130/140 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-08-24 18:40:15,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 247 flow [2023-08-24 18:40:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-08-24 18:40:15,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2023-08-24 18:40:15,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-08-24 18:40:15,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-08-24 18:40:15,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:15,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-08-24 18:40:15,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-08-24 18:40:15,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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) [2023-08-24 18:40:15,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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) [2023-08-24 18:40:15,774 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 133 flow. Second operand 3 states and 153 transitions. [2023-08-24 18:40:15,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 247 flow [2023-08-24 18:40:15,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 18:40:15,776 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 142 flow [2023-08-24 18:40:15,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-24 18:40:15,777 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -25 predicate places. [2023-08-24 18:40:15,777 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 142 flow [2023-08-24 18:40:15,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-08-24 18:40:15,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:15,777 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:15,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 18:40:15,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 33 more)] === [2023-08-24 18:40:15,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2117041916, now seen corresponding path program 1 times [2023-08-24 18:40:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104041624] [2023-08-24 18:40:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:15,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:15,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:15,800 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (36 of 37 remaining) [2023-08-24 18:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (35 of 37 remaining) [2023-08-24 18:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (34 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (33 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (32 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (31 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (30 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (29 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (28 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (27 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (26 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (25 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (24 of 37 remaining) [2023-08-24 18:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (21 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (14 of 37 remaining) [2023-08-24 18:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (13 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (12 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 37 remaining) [2023-08-24 18:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 37 remaining) [2023-08-24 18:40:15,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 37 remaining) [2023-08-24 18:40:15,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 37 remaining) [2023-08-24 18:40:15,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 18:40:15,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 18:40:15,804 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:15,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-24 18:40:15,831 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:15,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,844 INFO L124 PetriNetUnfolderBase]: 7/173 cut-off events. [2023-08-24 18:40:15,844 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-24 18:40:15,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 7/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 370 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-08-24 18:40:15,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:15,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2023-08-24 18:40:15,857 INFO L124 PetriNetUnfolderBase]: 7/173 cut-off events. [2023-08-24 18:40:15,858 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-24 18:40:15,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 7/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 370 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-08-24 18:40:15,862 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-24 18:40:18,219 INFO L134 LiptonReduction]: Checked pairs total: 21664 [2023-08-24 18:40:18,219 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-24 18:40:18,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:18,221 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:18,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-24 18:40:18,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:18,222 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-24 18:40:18,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:18,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:18,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:18,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 39 more)] === [2023-08-24 18:40:18,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:18,223 INFO L85 PathProgramCache]: Analyzing trace with hash 28098088, now seen corresponding path program 1 times [2023-08-24 18:40:18,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:18,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953795121] [2023-08-24 18:40:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953795121] [2023-08-24 18:40:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953795121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:18,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455095028] [2023-08-24 18:40:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:18,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:18,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:18,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 159 [2023-08-24 18:40:18,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-08-24 18:40:18,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:18,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 159 [2023-08-24 18:40:18,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:28,232 INFO L124 PetriNetUnfolderBase]: 117565/148862 cut-off events. [2023-08-24 18:40:28,232 INFO L125 PetriNetUnfolderBase]: For 59951/59951 co-relation queries the response was YES. [2023-08-24 18:40:28,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317853 conditions, 148862 events. 117565/148862 cut-off events. For 59951/59951 co-relation queries the response was YES. Maximal size of possible extension queue 7794. Compared 907811 event pairs, 29392 based on Foata normal form. 0/118803 useless extension candidates. Maximal degree in co-relation 51982. Up to 138414 conditions per place. [2023-08-24 18:40:29,317 INFO L140 encePairwiseOnDemand]: 115/159 looper letters, 49 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2023-08-24 18:40:29,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 335 flow [2023-08-24 18:40:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-24 18:40:29,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2023-08-24 18:40:29,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-24 18:40:29,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-24 18:40:29,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:29,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-24 18:40:29,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-08-24 18:40:29,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 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) [2023-08-24 18:40:29,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 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) [2023-08-24 18:40:29,322 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 192 flow. Second operand 3 states and 244 transitions. [2023-08-24 18:40:29,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 335 flow [2023-08-24 18:40:29,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 285 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-24 18:40:29,375 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 157 flow [2023-08-24 18:40:29,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-24 18:40:29,376 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -28 predicate places. [2023-08-24 18:40:29,376 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 157 flow [2023-08-24 18:40:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-08-24 18:40:29,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:29,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 18:40:29,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 39 more)] === [2023-08-24 18:40:29,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1798244619, now seen corresponding path program 1 times [2023-08-24 18:40:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715197587] [2023-08-24 18:40:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 18:40:29,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715197587] [2023-08-24 18:40:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715197587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:29,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:29,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 18:40:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37204806] [2023-08-24 18:40:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 18:40:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 18:40:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 18:40:29,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 159 [2023-08-24 18:40:29,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-08-24 18:40:29,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:29,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 159 [2023-08-24 18:40:29,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 18:40:32,825 INFO L124 PetriNetUnfolderBase]: 42327/53407 cut-off events. [2023-08-24 18:40:32,826 INFO L125 PetriNetUnfolderBase]: For 13148/13148 co-relation queries the response was YES. [2023-08-24 18:40:32,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130277 conditions, 53407 events. 42327/53407 cut-off events. For 13148/13148 co-relation queries the response was YES. Maximal size of possible extension queue 2248. Compared 279651 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 96838. Up to 52416 conditions per place. [2023-08-24 18:40:33,133 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-08-24 18:40:33,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 294 flow [2023-08-24 18:40:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 18:40:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 18:40:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-08-24 18:40:33,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35639412997903563 [2023-08-24 18:40:33,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-08-24 18:40:33,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-08-24 18:40:33,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 18:40:33,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-08-24 18:40:33,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-08-24 18:40:33,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 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) [2023-08-24 18:40:33,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 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) [2023-08-24 18:40:33,137 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 157 flow. Second operand 3 states and 170 transitions. [2023-08-24 18:40:33,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 294 flow [2023-08-24 18:40:33,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 18:40:33,145 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 168 flow [2023-08-24 18:40:33,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-24 18:40:33,146 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -32 predicate places. [2023-08-24 18:40:33,146 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 168 flow [2023-08-24 18:40:33,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2023-08-24 18:40:33,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:33,146 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 18:40:33,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 18:40:33,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 39 more)] === [2023-08-24 18:40:33,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1534374071, now seen corresponding path program 1 times [2023-08-24 18:40:33,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:33,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349929675] [2023-08-24 18:40:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:33,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 18:40:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 18:40:33,173 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 18:40:33,174 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 18:40:33,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (42 of 43 remaining) [2023-08-24 18:40:33,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (41 of 43 remaining) [2023-08-24 18:40:33,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (40 of 43 remaining) [2023-08-24 18:40:33,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (39 of 43 remaining) [2023-08-24 18:40:33,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (38 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (37 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (36 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (35 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (34 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (33 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (32 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (31 of 43 remaining) [2023-08-24 18:40:33,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (30 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (29 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (28 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (27 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (26 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (25 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (24 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 43 remaining) [2023-08-24 18:40:33,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (21 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (14 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (13 of 43 remaining) [2023-08-24 18:40:33,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (12 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (8 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 43 remaining) [2023-08-24 18:40:33,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 43 remaining) [2023-08-24 18:40:33,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 43 remaining) [2023-08-24 18:40:33,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 43 remaining) [2023-08-24 18:40:33,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 43 remaining) [2023-08-24 18:40:33,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 18:40:33,180 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 18:40:33,182 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 18:40:33,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-24 18:40:33,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 18:40:33,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,237 INFO L124 PetriNetUnfolderBase]: 8/198 cut-off events. [2023-08-24 18:40:33,237 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-24 18:40:33,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 198 events. 8/198 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 430 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2023-08-24 18:40:33,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 18:40:33,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 116 transitions, 309 flow [2023-08-24 18:40:33,259 INFO L124 PetriNetUnfolderBase]: 8/198 cut-off events. [2023-08-24 18:40:33,259 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-24 18:40:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 198 events. 8/198 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 430 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2023-08-24 18:40:33,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 8736 [2023-08-24 18:40:36,046 INFO L134 LiptonReduction]: Checked pairs total: 30068 [2023-08-24 18:40:36,046 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-24 18:40:36,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 18:40:36,048 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@c9ef295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 18:40:36,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-24 18:40:36,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 18:40:36,049 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-24 18:40:36,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 18:40:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 18:40:36,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 18:40:36,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 45 more)] === [2023-08-24 18:40:36,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 18:40:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 33979528, now seen corresponding path program 1 times [2023-08-24 18:40:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 18:40:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966491726] [2023-08-24 18:40:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 18:40:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 18:40:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 18:40:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 18:40:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 18:40:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966491726] [2023-08-24 18:40:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966491726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 18:40:36,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 18:40:36,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 18:40:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7763124] [2023-08-24 18:40:36,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 18:40:36,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 18:40:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 18:40:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 18:40:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 18:40:36,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 178 [2023-08-24 18:40:36,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 76 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 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) [2023-08-24 18:40:36,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 18:40:36,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 178 [2023-08-24 18:40:36,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand