/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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 [2023-08-25 22:19:02,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 22:19:02,845 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 [2023-08-25 22:19:02,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 22:19:02,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 22:19:02,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 22:19:02,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 22:19:02,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 22:19:02,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 22:19:02,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 22:19:02,881 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 22:19:02,882 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 22:19:02,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 22:19:02,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 22:19:02,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 22:19:02,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 22:19:02,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 22:19:02,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 22:19:02,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 22:19:02,885 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 22:19:02,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 22:19:02,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 22:19:02,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 22:19:02,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 22:19:02,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 22:19:02,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 22:19:02,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 22:19:02,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 22:19:02,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 22:19:02,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 22:19:03,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 22:19:03,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 22:19:03,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 22:19:03,145 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 22:19:03,146 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 22:19:03,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-25 22:19:04,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 22:19:04,296 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 22:19:04,296 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-08-25 22:19:04,305 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7517fa9/79c1642d8a4848c8b9397c46f410a92a/FLAGe5d2fd5ea [2023-08-25 22:19:04,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7517fa9/79c1642d8a4848c8b9397c46f410a92a [2023-08-25 22:19:04,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 22:19:04,316 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 22:19:04,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 22:19:04,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 22:19:04,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 22:19:04,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@291a942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04, skipping insertion in model container [2023-08-25 22:19:04,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,354 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 22:19:04,445 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-25 22:19:04,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 22:19:04,577 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 22:19:04,593 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-25 22:19:04,607 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-25 22:19:04,608 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-25 22:19:04,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 22:19:04,640 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 22:19:04,640 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 22:19:04,640 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 22:19:04,645 INFO L206 MainTranslator]: Completed translation [2023-08-25 22:19:04,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04 WrapperNode [2023-08-25 22:19:04,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 22:19:04,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 22:19:04,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 22:19:04,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 22:19:04,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,686 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-08-25 22:19:04,686 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 22:19:04,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 22:19:04,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 22:19:04,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 22:19:04,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 22:19:04,720 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 22:19:04,720 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 22:19:04,720 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 22:19:04,721 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (1/1) ... [2023-08-25 22:19:04,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 22:19:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 22:19:04,745 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) [2023-08-25 22:19:04,753 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 [2023-08-25 22:19:04,773 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-25 22:19:04,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-25 22:19:04,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 22:19:04,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 22:19:04,776 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 22:19:04,858 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 22:19:04,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 22:19:04,952 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 22:19:05,029 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 22:19:05,029 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-25 22:19:05,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 10:19:05 BoogieIcfgContainer [2023-08-25 22:19:05,031 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 22:19:05,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 22:19:05,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 22:19:05,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 22:19:05,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 10:19:04" (1/3) ... [2023-08-25 22:19:05,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f0d52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 10:19:05, skipping insertion in model container [2023-08-25 22:19:05,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 10:19:04" (2/3) ... [2023-08-25 22:19:05,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f0d52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 10:19:05, skipping insertion in model container [2023-08-25 22:19:05,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 10:19:05" (3/3) ... [2023-08-25 22:19:05,036 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-08-25 22:19:05,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 22:19:05,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-25 22:19:05,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 22:19:05,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:05,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,127 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-25 22:19:05,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:05,130 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. [2023-08-25 22:19:05,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:05,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,168 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:05,181 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-25 22:19:05,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:05,182 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. [2023-08-25 22:19:05,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-08-25 22:19:06,353 INFO L134 LiptonReduction]: Checked pairs total: 297 [2023-08-25 22:19:06,354 INFO L136 LiptonReduction]: Total number of compositions: 34 [2023-08-25 22:19:06,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:06,366 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:06,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-25 22:19:06,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:06,368 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:06,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:06,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:06,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:06,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err5ASSERT_VIOLATIONDATA_RACE (and 8 more)] === [2023-08-25 22:19:06,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash 7472706, now seen corresponding path program 1 times [2023-08-25 22:19:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823724830] [2023-08-25 22:19:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:06,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823724830] [2023-08-25 22:19:06,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823724830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:06,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:06,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180522694] [2023-08-25 22:19:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:06,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-25 22:19:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-25 22:19:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-25 22:19:06,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2023-08-25 22:19:06,530 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) [2023-08-25 22:19:06,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:06,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2023-08-25 22:19:06,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:06,552 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-25 22:19:06,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:06,553 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. [2023-08-25 22:19:06,554 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 5 selfloop transitions, 0 changer transitions 1/7 dead transitions. [2023-08-25 22:19:06,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 7 transitions, 31 flow [2023-08-25 22:19:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-25 22:19:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-25 22:19:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 64 transitions. [2023-08-25 22:19:06,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-25 22:19:06,563 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 64 transitions. [2023-08-25 22:19:06,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 64 transitions. [2023-08-25 22:19:06,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:06,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 64 transitions. [2023-08-25 22:19:06,567 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) [2023-08-25 22:19:06,571 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) [2023-08-25 22:19:06,572 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) [2023-08-25 22:19:06,573 INFO L175 Difference]: Start difference. First operand has 16 places, 13 transitions, 31 flow. Second operand 2 states and 64 transitions. [2023-08-25 22:19:06,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 7 transitions, 31 flow [2023-08-25 22:19:06,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:06,576 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 17 flow [2023-08-25 22:19:06,577 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=17, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-08-25 22:19:06,581 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -5 predicate places. [2023-08-25 22:19:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 17 flow [2023-08-25 22:19:06,581 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) [2023-08-25 22:19:06,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:06,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 22:19:06,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err5ASSERT_VIOLATIONDATA_RACE (and 8 more)] === [2023-08-25 22:19:06,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 7472708, now seen corresponding path program 1 times [2023-08-25 22:19:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:06,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571477612] [2023-08-25 22:19:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571477612] [2023-08-25 22:19:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571477612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110571637] [2023-08-25 22:19:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:06,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-08-25 22:19:06,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 6 transitions, 17 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) [2023-08-25 22:19:06,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:06,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-08-25 22:19:06,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:06,699 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-25 22:19:06,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 3/9 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-25 22:19:06,700 INFO L140 encePairwiseOnDemand]: 70/72 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-25 22:19:06,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 5 transitions, 23 flow [2023-08-25 22:19:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2023-08-25 22:19:06,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-25 22:19:06,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2023-08-25 22:19:06,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2023-08-25 22:19:06,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:06,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2023-08-25 22:19:06,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2023-08-25 22:19:06,703 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) [2023-08-25 22:19:06,703 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) [2023-08-25 22:19:06,703 INFO L175 Difference]: Start difference. First operand has 11 places, 6 transitions, 17 flow. Second operand 3 states and 80 transitions. [2023-08-25 22:19:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 5 transitions, 23 flow [2023-08-25 22:19:06,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 5 transitions, 23 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:06,703 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-25 22:19:06,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-25 22:19:06,704 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -5 predicate places. [2023-08-25 22:19:06,704 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-25 22:19:06,704 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) [2023-08-25 22:19:06,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (11 of 12 remaining) [2023-08-25 22:19:06,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (10 of 12 remaining) [2023-08-25 22:19:06,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (9 of 12 remaining) [2023-08-25 22:19:06,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (8 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (7 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (6 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (5 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (2 of 12 remaining) [2023-08-25 22:19:06,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (1 of 12 remaining) [2023-08-25 22:19:06,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (0 of 12 remaining) [2023-08-25 22:19:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 22:19:06,711 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-25 22:19:06,712 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:06,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:06,721 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-08-25 22:19:06,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:06,722 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. [2023-08-25 22:19:06,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 81 flow [2023-08-25 22:19:06,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 69 flow [2023-08-25 22:19:06,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:06,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 32 transitions, 69 flow [2023-08-25 22:19:06,723 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 32 transitions, 69 flow [2023-08-25 22:19:06,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 69 flow [2023-08-25 22:19:06,727 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2023-08-25 22:19:06,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:06,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-25 22:19:06,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 168 [2023-08-25 22:19:07,867 INFO L134 LiptonReduction]: Checked pairs total: 170 [2023-08-25 22:19:07,868 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-25 22:19:07,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:07,870 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:07,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:07,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:07,872 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-25 22:19:07,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:07,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:07,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:07,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash 8402077, now seen corresponding path program 1 times [2023-08-25 22:19:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997945536] [2023-08-25 22:19:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:07,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:07,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:07,913 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:07,913 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:07,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 22:19:07,913 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:07,914 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:07,914 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:07,914 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 22:19:07,923 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:07,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,931 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-25 22:19:07,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 22:19:07,932 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. [2023-08-25 22:19:07,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,932 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:07,932 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:07,939 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-25 22:19:07,939 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 22:19:07,939 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. [2023-08-25 22:19:07,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-25 22:19:08,930 INFO L134 LiptonReduction]: Checked pairs total: 2823 [2023-08-25 22:19:08,930 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-25 22:19:08,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:08,932 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:08,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-25 22:19:08,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:08,933 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:08,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:08,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:08,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:08,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT (and 14 more)] === [2023-08-25 22:19:08,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash 11415016, now seen corresponding path program 1 times [2023-08-25 22:19:08,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:08,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995745920] [2023-08-25 22:19:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:08,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995745920] [2023-08-25 22:19:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995745920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:08,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:08,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:08,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584521997] [2023-08-25 22:19:08,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 83 [2023-08-25 22:19:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 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) [2023-08-25 22:19:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 83 [2023-08-25 22:19:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:09,009 INFO L124 PetriNetUnfolderBase]: 41/98 cut-off events. [2023-08-25 22:19:09,010 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-25 22:19:09,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 98 events. 41/98 cut-off events. For 13/13 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 64. Up to 46 conditions per place. [2023-08-25 22:19:09,010 INFO L140 encePairwiseOnDemand]: 67/83 looper letters, 11 selfloop transitions, 3 changer transitions 6/23 dead transitions. [2023-08-25 22:19:09,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 103 flow [2023-08-25 22:19:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-25 22:19:09,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140562248995983 [2023-08-25 22:19:09,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-25 22:19:09,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-25 22:19:09,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:09,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-25 22:19:09,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-25 22:19:09,014 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) [2023-08-25 22:19:09,014 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) [2023-08-25 22:19:09,014 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 128 transitions. [2023-08-25 22:19:09,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 103 flow [2023-08-25 22:19:09,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 23 transitions, 101 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:09,015 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 53 flow [2023-08-25 22:19:09,015 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-25 22:19:09,015 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -8 predicate places. [2023-08-25 22:19:09,016 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 53 flow [2023-08-25 22:19:09,016 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) [2023-08-25 22:19:09,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:09,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:09,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 22:19:09,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT (and 14 more)] === [2023-08-25 22:19:09,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1285904180, now seen corresponding path program 1 times [2023-08-25 22:19:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:09,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459476086] [2023-08-25 22:19:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-25 22:19:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459476086] [2023-08-25 22:19:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459476086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:09,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 22:19:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109941663] [2023-08-25 22:19:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:09,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 83 [2023-08-25 22:19:09,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2023-08-25 22:19:09,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:09,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 83 [2023-08-25 22:19:09,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:09,087 INFO L124 PetriNetUnfolderBase]: 36/84 cut-off events. [2023-08-25 22:19:09,088 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-25 22:19:09,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 84 events. 36/84 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 302 event pairs, 9 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 111. Up to 55 conditions per place. [2023-08-25 22:19:09,088 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-25 22:19:09,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 94 flow [2023-08-25 22:19:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-08-25 22:19:09,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40963855421686746 [2023-08-25 22:19:09,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-08-25 22:19:09,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-08-25 22:19:09,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:09,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-08-25 22:19:09,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-08-25 22:19:09,091 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) [2023-08-25 22:19:09,091 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) [2023-08-25 22:19:09,091 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 53 flow. Second operand 3 states and 102 transitions. [2023-08-25 22:19:09,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 94 flow [2023-08-25 22:19:09,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-25 22:19:09,092 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-25 22:19:09,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-25 22:19:09,092 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -10 predicate places. [2023-08-25 22:19:09,092 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-25 22:19:09,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (17 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (16 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (15 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (14 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (13 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (12 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (11 of 18 remaining) [2023-08-25 22:19:09,093 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (9 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (8 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (7 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (6 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (5 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (4 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (3 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (2 of 18 remaining) [2023-08-25 22:19:09,094 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (1 of 18 remaining) [2023-08-25 22:19:09,095 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (0 of 18 remaining) [2023-08-25 22:19:09,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 22:19:09,095 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-25 22:19:09,095 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:09,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:09,101 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-25 22:19:09,101 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 22:19:09,101 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. [2023-08-25 22:19:09,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 114 flow [2023-08-25 22:19:09,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 45 transitions, 102 flow [2023-08-25 22:19:09,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:09,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 45 transitions, 102 flow [2023-08-25 22:19:09,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 45 transitions, 102 flow [2023-08-25 22:19:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 102 flow [2023-08-25 22:19:09,106 INFO L124 PetriNetUnfolderBase]: 0/55 cut-off events. [2023-08-25 22:19:09,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 22:19:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 55 events. 0/55 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-25 22:19:09,107 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-08-25 22:19:10,294 INFO L134 LiptonReduction]: Checked pairs total: 2458 [2023-08-25 22:19:10,294 INFO L136 LiptonReduction]: Total number of compositions: 30 [2023-08-25 22:19:10,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:10,296 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:10,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:10,298 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:10,298 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-25 22:19:10,298 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 22:19:10,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-25 22:19:10,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:10,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1221118144, now seen corresponding path program 1 times [2023-08-25 22:19:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138428633] [2023-08-25 22:19:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:10,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:10,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:10,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:10,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:10,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 22:19:10,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:10,316 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:10,316 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:10,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 22:19:10,327 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:10,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,338 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-25 22:19:10,338 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 22:19:10,339 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. [2023-08-25 22:19:10,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:10,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:10,346 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-25 22:19:10,346 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 22:19:10,346 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. [2023-08-25 22:19:10,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-08-25 22:19:11,564 INFO L134 LiptonReduction]: Checked pairs total: 5509 [2023-08-25 22:19:11,564 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-25 22:19:11,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:11,566 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:11,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-25 22:19:11,567 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:11,567 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:11,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:11,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:11,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONDATA_RACE (and 20 more)] === [2023-08-25 22:19:11,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:11,567 INFO L85 PathProgramCache]: Analyzing trace with hash 15879447, now seen corresponding path program 1 times [2023-08-25 22:19:11,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:11,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094540670] [2023-08-25 22:19:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:11,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094540670] [2023-08-25 22:19:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094540670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446629070] [2023-08-25 22:19:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:11,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:11,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 102 [2023-08-25 22:19:11,595 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) [2023-08-25 22:19:11,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:11,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 102 [2023-08-25 22:19:11,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:11,666 INFO L124 PetriNetUnfolderBase]: 349/606 cut-off events. [2023-08-25 22:19:11,666 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-08-25 22:19:11,667 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 3017 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. [2023-08-25 22:19:11,669 INFO L140 encePairwiseOnDemand]: 79/102 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-25 22:19:11,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 155 flow [2023-08-25 22:19:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-25 22:19:11,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130718954248366 [2023-08-25 22:19:11,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-25 22:19:11,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-25 22:19:11,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:11,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-25 22:19:11,672 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) [2023-08-25 22:19:11,672 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) [2023-08-25 22:19:11,673 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) [2023-08-25 22:19:11,673 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 93 flow. Second operand 3 states and 157 transitions. [2023-08-25 22:19:11,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 155 flow [2023-08-25 22:19:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 147 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:11,674 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 85 flow [2023-08-25 22:19:11,674 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} [2023-08-25 22:19:11,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -13 predicate places. [2023-08-25 22:19:11,675 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 85 flow [2023-08-25 22:19:11,675 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) [2023-08-25 22:19:11,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:11,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:11,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 22:19:11,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err2ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONDATA_RACE (and 20 more)] === [2023-08-25 22:19:11,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash 215420659, now seen corresponding path program 1 times [2023-08-25 22:19:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:11,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167676853] [2023-08-25 22:19:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:11,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-25 22:19:11,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167676853] [2023-08-25 22:19:11,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167676853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:11,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 22:19:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527165433] [2023-08-25 22:19:11,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:11,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:11,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 102 [2023-08-25 22:19:11,706 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) [2023-08-25 22:19:11,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 102 [2023-08-25 22:19:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:11,767 INFO L124 PetriNetUnfolderBase]: 279/467 cut-off events. [2023-08-25 22:19:11,767 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-25 22:19:11,768 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. [2023-08-25 22:19:11,768 INFO L140 encePairwiseOnDemand]: 96/102 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-25 22:19:11,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 153 flow [2023-08-25 22:19:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-08-25 22:19:11,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-25 22:19:11,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-08-25 22:19:11,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-08-25 22:19:11,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:11,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-08-25 22:19:11,770 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) [2023-08-25 22:19:11,770 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) [2023-08-25 22:19:11,771 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) [2023-08-25 22:19:11,771 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 85 flow. Second operand 3 states and 119 transitions. [2023-08-25 22:19:11,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 153 flow [2023-08-25 22:19:11,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-25 22:19:11,772 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-25 22:19:11,772 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=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-25 22:19:11,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2023-08-25 22:19:11,772 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-25 22:19:11,772 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) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (23 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (22 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (21 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (20 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (19 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (17 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (15 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (14 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (13 of 24 remaining) [2023-08-25 22:19:11,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (12 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (11 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (9 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (8 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (7 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (6 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (5 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (4 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (3 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (2 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (1 of 24 remaining) [2023-08-25 22:19:11,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (0 of 24 remaining) [2023-08-25 22:19:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 22:19:11,775 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-25 22:19:11,775 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:11,781 INFO L124 PetriNetUnfolderBase]: 4/98 cut-off events. [2023-08-25 22:19:11,781 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 22:19:11,782 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. [2023-08-25 22:19:11,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-25 22:19:11,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 58 transitions, 137 flow [2023-08-25 22:19:11,782 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:11,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 58 transitions, 137 flow [2023-08-25 22:19:11,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 58 transitions, 137 flow [2023-08-25 22:19:11,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 58 transitions, 137 flow [2023-08-25 22:19:11,786 INFO L124 PetriNetUnfolderBase]: 0/74 cut-off events. [2023-08-25 22:19:11,787 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 22:19:11,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 74 events. 0/74 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-25 22:19:11,787 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-25 22:19:13,164 INFO L134 LiptonReduction]: Checked pairs total: 6121 [2023-08-25 22:19:13,165 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-08-25 22:19:13,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:13,166 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:13,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:13,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:13,168 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2023-08-25 22:19:13,168 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 22:19:13,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:13,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-25 22:19:13,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:13,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1068991945, now seen corresponding path program 1 times [2023-08-25 22:19:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504930995] [2023-08-25 22:19:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:13,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:13,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:13,192 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:13,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 22:19:13,193 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:13,194 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:13,194 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:13,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 22:19:13,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:13,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,224 INFO L124 PetriNetUnfolderBase]: 5/123 cut-off events. [2023-08-25 22:19:13,224 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 22:19:13,224 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. [2023-08-25 22:19:13,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,225 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:13,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:13,234 INFO L124 PetriNetUnfolderBase]: 5/123 cut-off events. [2023-08-25 22:19:13,234 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 22:19:13,234 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. [2023-08-25 22:19:13,236 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-08-25 22:19:14,781 INFO L134 LiptonReduction]: Checked pairs total: 9378 [2023-08-25 22:19:14,782 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-25 22:19:14,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:14,790 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:14,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-25 22:19:14,791 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:14,791 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:14,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:14,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:14,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE (and 26 more)] === [2023-08-25 22:19:14,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash 21109623, now seen corresponding path program 1 times [2023-08-25 22:19:14,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:14,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265058689] [2023-08-25 22:19:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:14,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:14,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265058689] [2023-08-25 22:19:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265058689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:14,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:14,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332219944] [2023-08-25 22:19:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-25 22:19:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-25 22:19:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-25 22:19:14,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 121 [2023-08-25 22:19:14,809 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) [2023-08-25 22:19:14,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:14,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 121 [2023-08-25 22:19:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:15,191 INFO L124 PetriNetUnfolderBase]: 4064/6063 cut-off events. [2023-08-25 22:19:15,191 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-25 22:19:15,196 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 402. Compared 34887 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. [2023-08-25 22:19:15,214 INFO L140 encePairwiseOnDemand]: 100/121 looper letters, 22 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-25 22:19:15,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 126 flow [2023-08-25 22:19:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-25 22:19:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-25 22:19:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 113 transitions. [2023-08-25 22:19:15,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2023-08-25 22:19:15,215 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 113 transitions. [2023-08-25 22:19:15,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 113 transitions. [2023-08-25 22:19:15,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:15,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 113 transitions. [2023-08-25 22:19:15,215 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) [2023-08-25 22:19:15,216 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) [2023-08-25 22:19:15,217 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) [2023-08-25 22:19:15,217 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 124 flow. Second operand 2 states and 113 transitions. [2023-08-25 22:19:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 126 flow [2023-08-25 22:19:15,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 114 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:15,220 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 70 flow [2023-08-25 22:19:15,220 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} [2023-08-25 22:19:15,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -20 predicate places. [2023-08-25 22:19:15,220 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 70 flow [2023-08-25 22:19:15,221 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) [2023-08-25 22:19:15,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:15,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 22:19:15,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE (and 26 more)] === [2023-08-25 22:19:15,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 21109624, now seen corresponding path program 1 times [2023-08-25 22:19:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602051295] [2023-08-25 22:19:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602051295] [2023-08-25 22:19:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602051295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:15,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:15,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431380501] [2023-08-25 22:19:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:15,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 121 [2023-08-25 22:19:15,253 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) [2023-08-25 22:19:15,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:15,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 121 [2023-08-25 22:19:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:15,470 INFO L124 PetriNetUnfolderBase]: 2587/3816 cut-off events. [2023-08-25 22:19:15,470 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-08-25 22:19:15,473 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 21573 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. [2023-08-25 22:19:15,484 INFO L140 encePairwiseOnDemand]: 112/121 looper letters, 33 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-25 22:19:15,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 193 flow [2023-08-25 22:19:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-08-25 22:19:15,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39669421487603307 [2023-08-25 22:19:15,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-08-25 22:19:15,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-08-25 22:19:15,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:15,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-08-25 22:19:15,486 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) [2023-08-25 22:19:15,487 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) [2023-08-25 22:19:15,487 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) [2023-08-25 22:19:15,487 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 70 flow. Second operand 3 states and 144 transitions. [2023-08-25 22:19:15,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 193 flow [2023-08-25 22:19:15,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:15,488 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 109 flow [2023-08-25 22:19:15,489 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} [2023-08-25 22:19:15,489 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -17 predicate places. [2023-08-25 22:19:15,489 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 109 flow [2023-08-25 22:19:15,489 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) [2023-08-25 22:19:15,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:15,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:15,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 22:19:15,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE (and 26 more)] === [2023-08-25 22:19:15,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1346821414, now seen corresponding path program 1 times [2023-08-25 22:19:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:15,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767930769] [2023-08-25 22:19:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-25 22:19:15,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767930769] [2023-08-25 22:19:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767930769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:15,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:15,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 22:19:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320417158] [2023-08-25 22:19:15,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:15,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 121 [2023-08-25 22:19:15,530 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) [2023-08-25 22:19:15,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:15,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 121 [2023-08-25 22:19:15,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:15,687 INFO L124 PetriNetUnfolderBase]: 1623/2343 cut-off events. [2023-08-25 22:19:15,687 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-08-25 22:19:15,689 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. [2023-08-25 22:19:15,691 INFO L140 encePairwiseOnDemand]: 113/121 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-25 22:19:15,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 200 flow [2023-08-25 22:19:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-08-25 22:19:15,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746556473829201 [2023-08-25 22:19:15,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-08-25 22:19:15,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-08-25 22:19:15,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:15,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-08-25 22:19:15,693 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) [2023-08-25 22:19:15,694 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) [2023-08-25 22:19:15,694 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) [2023-08-25 22:19:15,694 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 109 flow. Second operand 3 states and 136 transitions. [2023-08-25 22:19:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 200 flow [2023-08-25 22:19:15,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-25 22:19:15,696 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-25 22:19:15,696 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=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-25 22:19:15,697 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -20 predicate places. [2023-08-25 22:19:15,697 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-25 22:19:15,697 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) [2023-08-25 22:19:15,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (29 of 30 remaining) [2023-08-25 22:19:15,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (28 of 30 remaining) [2023-08-25 22:19:15,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (27 of 30 remaining) [2023-08-25 22:19:15,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (26 of 30 remaining) [2023-08-25 22:19:15,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (25 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (24 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (23 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (22 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (21 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (20 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (18 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (17 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (16 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (15 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (14 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (13 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (12 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (11 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (10 of 30 remaining) [2023-08-25 22:19:15,698 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (9 of 30 remaining) [2023-08-25 22:19:15,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (8 of 30 remaining) [2023-08-25 22:19:15,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (7 of 30 remaining) [2023-08-25 22:19:15,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (6 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (5 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (3 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 30 remaining) [2023-08-25 22:19:15,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (0 of 30 remaining) [2023-08-25 22:19:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 22:19:15,700 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-25 22:19:15,700 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:15,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:15,710 INFO L124 PetriNetUnfolderBase]: 5/123 cut-off events. [2023-08-25 22:19:15,710 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 22:19:15,710 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. [2023-08-25 22:19:15,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 77 transitions, 186 flow [2023-08-25 22:19:15,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 71 transitions, 174 flow [2023-08-25 22:19:15,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:15,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 71 transitions, 174 flow [2023-08-25 22:19:15,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 71 transitions, 174 flow [2023-08-25 22:19:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 71 transitions, 174 flow [2023-08-25 22:19:15,717 INFO L124 PetriNetUnfolderBase]: 0/93 cut-off events. [2023-08-25 22:19:15,717 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 22:19:15,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 93 events. 0/93 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-25 22:19:15,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-25 22:19:17,402 INFO L134 LiptonReduction]: Checked pairs total: 10978 [2023-08-25 22:19:17,402 INFO L136 LiptonReduction]: Total number of compositions: 42 [2023-08-25 22:19:17,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:17,404 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:17,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:17,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:17,407 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2023-08-25 22:19:17,407 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 22:19:17,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:17,407 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:17,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:17,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1667818853, now seen corresponding path program 1 times [2023-08-25 22:19:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:17,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7622921] [2023-08-25 22:19:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:17,420 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:17,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:17,435 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:17,435 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:17,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-25 22:19:17,435 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:17,435 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:17,435 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:17,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 22:19:17,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:17,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,460 INFO L124 PetriNetUnfolderBase]: 6/148 cut-off events. [2023-08-25 22:19:17,460 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 22:19:17,460 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. [2023-08-25 22:19:17,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:17,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:17,471 INFO L124 PetriNetUnfolderBase]: 6/148 cut-off events. [2023-08-25 22:19:17,471 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 22:19:17,471 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. [2023-08-25 22:19:17,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-08-25 22:19:19,215 INFO L134 LiptonReduction]: Checked pairs total: 15240 [2023-08-25 22:19:19,216 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-25 22:19:19,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:19,217 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:19,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-25 22:19:19,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:19,218 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-25 22:19:19,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:19,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:19,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:19,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE (and 32 more)] === [2023-08-25 22:19:19,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 27112271, now seen corresponding path program 1 times [2023-08-25 22:19:19,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:19,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427458315] [2023-08-25 22:19:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:19,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:19,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427458315] [2023-08-25 22:19:19,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427458315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:19,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166777314] [2023-08-25 22:19:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:19,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 140 [2023-08-25 22:19:19,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 157 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) [2023-08-25 22:19:19,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:19,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 140 [2023-08-25 22:19:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:20,552 INFO L124 PetriNetUnfolderBase]: 17883/24016 cut-off events. [2023-08-25 22:19:20,552 INFO L125 PetriNetUnfolderBase]: For 8378/8378 co-relation queries the response was YES. [2023-08-25 22:19:20,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51347 conditions, 24016 events. 17883/24016 cut-off events. For 8378/8378 co-relation queries the response was YES. Maximal size of possible extension queue 1594. Compared 142677 event pairs, 4534 based on Foata normal form. 0/19607 useless extension candidates. Maximal degree in co-relation 8297. Up to 21020 conditions per place. [2023-08-25 22:19:20,644 INFO L140 encePairwiseOnDemand]: 103/140 looper letters, 41 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-25 22:19:20,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 271 flow [2023-08-25 22:19:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-25 22:19:20,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2023-08-25 22:19:20,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-25 22:19:20,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-25 22:19:20,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:20,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-25 22:19:20,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-08-25 22:19:20,647 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) [2023-08-25 22:19:20,647 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) [2023-08-25 22:19:20,647 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 157 flow. Second operand 3 states and 215 transitions. [2023-08-25 22:19:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 271 flow [2023-08-25 22:19:20,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 239 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:20,652 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 133 flow [2023-08-25 22:19:20,653 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-25 22:19:20,654 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -23 predicate places. [2023-08-25 22:19:20,654 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 133 flow [2023-08-25 22:19:20,654 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) [2023-08-25 22:19:20,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:20,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:20,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-25 22:19:20,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE (and 32 more)] === [2023-08-25 22:19:20,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash -793894256, now seen corresponding path program 1 times [2023-08-25 22:19:20,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096755949] [2023-08-25 22:19:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:20,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-25 22:19:20,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096755949] [2023-08-25 22:19:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096755949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:20,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 22:19:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397175982] [2023-08-25 22:19:20,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:20,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:20,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:20,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 140 [2023-08-25 22:19:20,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 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) [2023-08-25 22:19:20,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:20,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 140 [2023-08-25 22:19:20,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:21,360 INFO L124 PetriNetUnfolderBase]: 8535/11343 cut-off events. [2023-08-25 22:19:21,361 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2023-08-25 22:19:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27936 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 57649 event pairs, 2043 based on Foata normal form. 2092/13381 useless extension candidates. Maximal degree in co-relation 20700. Up to 10912 conditions per place. [2023-08-25 22:19:21,378 INFO L140 encePairwiseOnDemand]: 130/140 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-25 22:19:21,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 247 flow [2023-08-25 22:19:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-08-25 22:19:21,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2023-08-25 22:19:21,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-08-25 22:19:21,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-08-25 22:19:21,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:21,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-08-25 22:19:21,380 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) [2023-08-25 22:19:21,381 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) [2023-08-25 22:19:21,381 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) [2023-08-25 22:19:21,381 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 133 flow. Second operand 3 states and 153 transitions. [2023-08-25 22:19:21,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 247 flow [2023-08-25 22:19:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-25 22:19:21,383 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-25 22:19:21,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-25 22:19:21,383 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -27 predicate places. [2023-08-25 22:19:21,384 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-25 22:19:21,384 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) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (35 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (34 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (33 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (32 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (31 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (30 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (29 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (28 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (27 of 36 remaining) [2023-08-25 22:19:21,384 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (26 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (25 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (24 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (23 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (22 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (21 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (20 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (19 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (18 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (17 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (16 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (15 of 36 remaining) [2023-08-25 22:19:21,385 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (14 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (13 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (12 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (11 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (10 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (9 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (8 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (7 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (6 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (5 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (4 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (3 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (2 of 36 remaining) [2023-08-25 22:19:21,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (1 of 36 remaining) [2023-08-25 22:19:21,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (0 of 36 remaining) [2023-08-25 22:19:21,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-25 22:19:21,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-25 22:19:21,387 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:21,396 INFO L124 PetriNetUnfolderBase]: 6/148 cut-off events. [2023-08-25 22:19:21,396 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 22:19:21,397 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. [2023-08-25 22:19:21,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 90 transitions, 225 flow [2023-08-25 22:19:21,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 84 transitions, 213 flow [2023-08-25 22:19:21,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:21,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 84 transitions, 213 flow [2023-08-25 22:19:21,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 84 transitions, 213 flow [2023-08-25 22:19:21,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 84 transitions, 213 flow [2023-08-25 22:19:21,404 INFO L124 PetriNetUnfolderBase]: 0/112 cut-off events. [2023-08-25 22:19:21,404 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 22:19:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 112 events. 0/112 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 165 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-25 22:19:21,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 3960 [2023-08-25 22:19:23,301 INFO L134 LiptonReduction]: Checked pairs total: 15812 [2023-08-25 22:19:23,301 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-08-25 22:19:23,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:23,302 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:23,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:23,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:23,305 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2023-08-25 22:19:23,305 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 22:19:23,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:23,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:23,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:23,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1823785093, now seen corresponding path program 1 times [2023-08-25 22:19:23,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:23,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960113403] [2023-08-25 22:19:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:23,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:23,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:23,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:23,320 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:23,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-25 22:19:23,320 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:23,320 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:23,321 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:23,321 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 22:19:23,338 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:23,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,346 INFO L124 PetriNetUnfolderBase]: 7/173 cut-off events. [2023-08-25 22:19:23,346 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 22:19:23,347 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. [2023-08-25 22:19:23,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:23,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:23,357 INFO L124 PetriNetUnfolderBase]: 7/173 cut-off events. [2023-08-25 22:19:23,357 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 22:19:23,357 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. [2023-08-25 22:19:23,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-25 22:19:25,372 INFO L134 LiptonReduction]: Checked pairs total: 21664 [2023-08-25 22:19:25,372 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-25 22:19:25,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:25,373 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:25,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-25 22:19:25,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:25,374 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:25,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:25,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:25,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:25,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONDATA_RACE === [thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT (and 38 more)] === [2023-08-25 22:19:25,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash 33886440, now seen corresponding path program 1 times [2023-08-25 22:19:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:25,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196972292] [2023-08-25 22:19:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196972292] [2023-08-25 22:19:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196972292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:25,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:25,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23323142] [2023-08-25 22:19:25,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-25 22:19:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-25 22:19:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-25 22:19:25,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 159 [2023-08-25 22:19:25,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 192 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-08-25 22:19:25,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:25,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 159 [2023-08-25 22:19:25,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:38,119 INFO L124 PetriNetUnfolderBase]: 164064/214063 cut-off events. [2023-08-25 22:19:38,119 INFO L125 PetriNetUnfolderBase]: For 118798/118798 co-relation queries the response was YES. [2023-08-25 22:19:38,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462314 conditions, 214063 events. 164064/214063 cut-off events. For 118798/118798 co-relation queries the response was YES. Maximal size of possible extension queue 8651. Compared 1378289 event pairs, 164064 based on Foata normal form. 0/161328 useless extension candidates. Maximal degree in co-relation 79962. Up to 203127 conditions per place. [2023-08-25 22:19:39,093 INFO L140 encePairwiseOnDemand]: 128/159 looper letters, 32 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-08-25 22:19:39,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 35 transitions, 194 flow [2023-08-25 22:19:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-25 22:19:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-25 22:19:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 145 transitions. [2023-08-25 22:19:39,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2023-08-25 22:19:39,094 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 145 transitions. [2023-08-25 22:19:39,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 145 transitions. [2023-08-25 22:19:39,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:39,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 145 transitions. [2023-08-25 22:19:39,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-08-25 22:19:39,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-08-25 22:19:39,097 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-08-25 22:19:39,097 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 192 flow. Second operand 2 states and 145 transitions. [2023-08-25 22:19:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 35 transitions, 194 flow [2023-08-25 22:19:39,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 164 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:39,245 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 100 flow [2023-08-25 22:19:39,245 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=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-08-25 22:19:39,245 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -30 predicate places. [2023-08-25 22:19:39,245 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 100 flow [2023-08-25 22:19:39,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-08-25 22:19:39,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:39,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:39,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-25 22:19:39,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT (and 38 more)] === [2023-08-25 22:19:39,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash 33886441, now seen corresponding path program 1 times [2023-08-25 22:19:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828749020] [2023-08-25 22:19:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:39,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828749020] [2023-08-25 22:19:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828749020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:39,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:39,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589991541] [2023-08-25 22:19:39,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:39,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:39,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:39,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 159 [2023-08-25 22:19:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 100 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) [2023-08-25 22:19:39,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 159 [2023-08-25 22:19:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:47,685 INFO L124 PetriNetUnfolderBase]: 117565/148862 cut-off events. [2023-08-25 22:19:47,685 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2023-08-25 22:19:47,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305719 conditions, 148862 events. 117565/148862 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 7794. Compared 907926 event pairs, 29392 based on Foata normal form. 0/118803 useless extension candidates. Maximal degree in co-relation 305710. Up to 138414 conditions per place. [2023-08-25 22:19:48,327 INFO L140 encePairwiseOnDemand]: 146/159 looper letters, 49 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2023-08-25 22:19:48,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 285 flow [2023-08-25 22:19:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-08-25 22:19:48,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38155136268343814 [2023-08-25 22:19:48,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-08-25 22:19:48,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-08-25 22:19:48,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:48,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-08-25 22:19:48,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-08-25 22:19:48,329 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) [2023-08-25 22:19:48,329 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) [2023-08-25 22:19:48,329 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 100 flow. Second operand 3 states and 182 transitions. [2023-08-25 22:19:48,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 285 flow [2023-08-25 22:19:48,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 285 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 22:19:48,344 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 157 flow [2023-08-25 22:19:48,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=52, PETRI_TRANSITIONS=41} [2023-08-25 22:19:48,344 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -27 predicate places. [2023-08-25 22:19:48,344 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 157 flow [2023-08-25 22:19:48,345 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) [2023-08-25 22:19:48,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:48,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-25 22:19:48,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2ASSERT_VIOLATIONASSERT === [thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err4ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT (and 38 more)] === [2023-08-25 22:19:48,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1729872758, now seen corresponding path program 1 times [2023-08-25 22:19:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840154017] [2023-08-25 22:19:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-25 22:19:48,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:48,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840154017] [2023-08-25 22:19:48,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840154017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:48,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 22:19:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295115556] [2023-08-25 22:19:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 22:19:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 22:19:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 22:19:48,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 159 [2023-08-25 22:19:48,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 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) [2023-08-25 22:19:48,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:48,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 159 [2023-08-25 22:19:48,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 22:19:51,365 INFO L124 PetriNetUnfolderBase]: 42327/53407 cut-off events. [2023-08-25 22:19:51,365 INFO L125 PetriNetUnfolderBase]: For 13148/13148 co-relation queries the response was YES. [2023-08-25 22:19:51,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130278 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 280041 event pairs, 11441 based on Foata normal form. 11464/64736 useless extension candidates. Maximal degree in co-relation 130267. Up to 52416 conditions per place. [2023-08-25 22:19:51,483 INFO L140 encePairwiseOnDemand]: 147/159 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-25 22:19:51,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 294 flow [2023-08-25 22:19:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 22:19:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 22:19:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-08-25 22:19:51,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35639412997903563 [2023-08-25 22:19:51,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-08-25 22:19:51,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-08-25 22:19:51,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 22:19:51,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-08-25 22:19:51,485 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) [2023-08-25 22:19:51,486 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) [2023-08-25 22:19:51,486 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) [2023-08-25 22:19:51,486 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 157 flow. Second operand 3 states and 170 transitions. [2023-08-25 22:19:51,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 294 flow [2023-08-25 22:19:51,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-25 22:19:51,493 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-25 22:19:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-25 22:19:51,493 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -32 predicate places. [2023-08-25 22:19:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-25 22:19:51,493 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) [2023-08-25 22:19:51,493 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (41 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (40 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (39 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (38 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (37 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (36 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (35 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (34 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (33 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (32 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (31 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (30 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (29 of 42 remaining) [2023-08-25 22:19:51,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (28 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (27 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (26 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (25 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (24 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (23 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (21 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (20 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (19 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (18 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (17 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (16 of 42 remaining) [2023-08-25 22:19:51,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (15 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (14 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (13 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (12 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (11 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (10 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (9 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err5ASSERT_VIOLATIONDATA_RACE (8 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (5 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (4 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err2ASSERT_VIOLATIONASSERT (3 of 42 remaining) [2023-08-25 22:19:51,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONDATA_RACE (2 of 42 remaining) [2023-08-25 22:19:51,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err3ASSERT_VIOLATIONDATA_RACE (1 of 42 remaining) [2023-08-25 22:19:51,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err4ASSERT_VIOLATIONDATA_RACE (0 of 42 remaining) [2023-08-25 22:19:51,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-25 22:19:51,497 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-25 22:19:51,497 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-25 22:19:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:51,508 INFO L124 PetriNetUnfolderBase]: 7/173 cut-off events. [2023-08-25 22:19:51,508 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 22:19:51,509 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. [2023-08-25 22:19:51,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 103 transitions, 266 flow [2023-08-25 22:19:51,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 97 transitions, 254 flow [2023-08-25 22:19:51,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:51,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 97 transitions, 254 flow [2023-08-25 22:19:51,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 97 transitions, 254 flow [2023-08-25 22:19:51,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 97 transitions, 254 flow [2023-08-25 22:19:51,518 INFO L124 PetriNetUnfolderBase]: 0/131 cut-off events. [2023-08-25 22:19:51,518 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 22:19:51,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 131 events. 0/131 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 194 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-25 22:19:51,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 5688 [2023-08-25 22:19:53,692 INFO L134 LiptonReduction]: Checked pairs total: 22873 [2023-08-25 22:19:53,692 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-08-25 22:19:53,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 22:19:53,693 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:53,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 22:19:53,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:53,698 INFO L124 PetriNetUnfolderBase]: 0/73 cut-off events. [2023-08-25 22:19:53,698 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 22:19:53,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:53,698 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 22:19:53,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 22:19:53,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 308063818, now seen corresponding path program 1 times [2023-08-25 22:19:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969321941] [2023-08-25 22:19:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:53,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 22:19:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 22:19:53,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 22:19:53,721 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 22:19:53,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 22:19:53,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-25 22:19:53,721 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 22:19:53,721 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-25 22:19:53,721 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 22:19:53,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 22:19:53,742 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 22:19:53,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,755 INFO L124 PetriNetUnfolderBase]: 8/198 cut-off events. [2023-08-25 22:19:53,755 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 22:19:53,755 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. [2023-08-25 22:19:53,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 22:19:53,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 116 transitions, 309 flow [2023-08-25 22:19:53,768 INFO L124 PetriNetUnfolderBase]: 8/198 cut-off events. [2023-08-25 22:19:53,769 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 22:19:53,769 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. [2023-08-25 22:19:53,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 8736 [2023-08-25 22:19:56,028 INFO L134 LiptonReduction]: Checked pairs total: 34541 [2023-08-25 22:19:56,028 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-25 22:19:56,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-25 22:19:56,029 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;@1c52e6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 22:19:56,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-25 22:19:56,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 22:19:56,030 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-25 22:19:56,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 22:19:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 22:19:56,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-25 22:19:56,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE, thr1Err5ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONASSERT (and 44 more)] === [2023-08-25 22:19:56,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 22:19:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash 41425412, now seen corresponding path program 1 times [2023-08-25 22:19:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 22:19:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944312603] [2023-08-25 22:19:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 22:19:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 22:19:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 22:19:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-25 22:19:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 22:19:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944312603] [2023-08-25 22:19:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944312603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 22:19:56,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 22:19:56,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-25 22:19:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192272960] [2023-08-25 22:19:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 22:19:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-25 22:19:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 22:19:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-25 22:19:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-25 22:19:56,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 178 [2023-08-25 22:19:56,052 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) [2023-08-25 22:19:56,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 22:19:56,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 178 [2023-08-25 22:19:56,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand