/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:17:24,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:17:24,072 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-SemanticLbe.epf [2023-11-17 11:17:24,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:17:24,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:17:24,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:17:24,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:17:24,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:17:24,098 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:17:24,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:17:24,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:17:24,099 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:17:24,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:17:24,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:17:24,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:17:24,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:17:24,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:17:24,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:17:24,101 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:17:24,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:17:24,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:17:24,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:17:24,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:17:24,102 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:17:24,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:17:24,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:17:24,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:17:24,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:17:24,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:17:24,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:17:24,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:17:24,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:17:24,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:17:24,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:17:24,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:17:24,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:17:24,329 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:17:24,329 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:17:24,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-11-17 11:17:25,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:17:25,601 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:17:25,608 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-11-17 11:17:25,619 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb40f26d2/44e4b153b2bc4ce38355db69391734f1/FLAG778522022 [2023-11-17 11:17:25,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb40f26d2/44e4b153b2bc4ce38355db69391734f1 [2023-11-17 11:17:25,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:17:25,632 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:17:25,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:17:25,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:17:25,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:17:25,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:17:25" (1/1) ... [2023-11-17 11:17:25,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbce25c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:25, skipping insertion in model container [2023-11-17 11:17:25,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:17:25" (1/1) ... [2023-11-17 11:17:25,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:17:25,814 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:17:25,932 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-17 11:17:25,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:17:25,956 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:17:25,971 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:17:25,984 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-17 11:17:25,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:17:26,021 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:17:26,021 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:17:26,021 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:17:26,026 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:17:26,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26 WrapperNode [2023-11-17 11:17:26,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:17:26,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:17:26,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:17:26,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:17:26,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,058 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,082 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2023-11-17 11:17:26,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:17:26,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:17:26,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:17:26,083 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:17:26,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,106 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,110 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,113 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:17:26,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:17:26,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:17:26,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:17:26,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (1/1) ... [2023-11-17 11:17:26,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:17:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:17:26,157 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) [2023-11-17 11:17:26,159 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 [2023-11-17 11:17:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:17:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-17 11:17:26,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:17:26,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:17:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-17 11:17:26,180 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-17 11:17:26,183 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:17:26,279 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:17:26,281 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:17:26,405 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:17:26,550 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:17:26,550 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 11:17:26,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:17:26 BoogieIcfgContainer [2023-11-17 11:17:26,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:17:26,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:17:26,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:17:26,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:17:26,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:17:25" (1/3) ... [2023-11-17 11:17:26,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1c1007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:17:26, skipping insertion in model container [2023-11-17 11:17:26,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:17:26" (2/3) ... [2023-11-17 11:17:26,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1c1007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:17:26, skipping insertion in model container [2023-11-17 11:17:26,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:17:26" (3/3) ... [2023-11-17 11:17:26,556 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-17 11:17:26,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:17:26,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:17:26,588 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:17:26,653 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:17:26,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 57 transitions, 142 flow [2023-11-17 11:17:26,735 INFO L124 PetriNetUnfolderBase]: 2/53 cut-off events. [2023-11-17 11:17:26,735 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:17:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 2/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-17 11:17:26,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 57 transitions, 142 flow [2023-11-17 11:17:26,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 51 transitions, 123 flow [2023-11-17 11:17:26,749 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:17:26,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 51 transitions, 123 flow [2023-11-17 11:17:26,761 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 51 transitions, 123 flow [2023-11-17 11:17:26,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 51 transitions, 123 flow [2023-11-17 11:17:26,778 INFO L124 PetriNetUnfolderBase]: 2/51 cut-off events. [2023-11-17 11:17:26,778 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:17:26,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 51 events. 2/51 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-17 11:17:26,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 1412 [2023-11-17 11:17:27,237 INFO L134 LiptonReduction]: Checked pairs total: 3508 [2023-11-17 11:17:27,237 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 11:17:27,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:17:27,262 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@659da6fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:17:27,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:17:27,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:17:27,268 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-11-17 11:17:27,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:17:27,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:27,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:27,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:27,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2000275824, now seen corresponding path program 1 times [2023-11-17 11:17:27,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:27,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840546276] [2023-11-17 11:17:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:27,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840546276] [2023-11-17 11:17:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840546276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:27,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:27,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:17:27,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557541437] [2023-11-17 11:17:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:17:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:17:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:17:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2023-11-17 11:17:27,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2023-11-17 11:17:27,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:27,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2023-11-17 11:17:27,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:29,321 INFO L124 PetriNetUnfolderBase]: 17327/24636 cut-off events. [2023-11-17 11:17:29,321 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES. [2023-11-17 11:17:29,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50007 conditions, 24636 events. 17327/24636 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 144218 event pairs, 2851 based on Foata normal form. 0/23206 useless extension candidates. Maximal degree in co-relation 39272. Up to 11555 conditions per place. [2023-11-17 11:17:29,456 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 149 selfloop transitions, 26 changer transitions 4/180 dead transitions. [2023-11-17 11:17:29,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 180 transitions, 802 flow [2023-11-17 11:17:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:17:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:17:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 307 transitions. [2023-11-17 11:17:29,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443001443001443 [2023-11-17 11:17:29,470 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 307 transitions. [2023-11-17 11:17:29,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 307 transitions. [2023-11-17 11:17:29,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:29,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 307 transitions. [2023-11-17 11:17:29,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 34.111111111111114) internal successors, (307), 9 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:17:29,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:29,483 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:29,484 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 307 transitions. [2023-11-17 11:17:29,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 180 transitions, 802 flow [2023-11-17 11:17:29,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 180 transitions, 752 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-17 11:17:29,514 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-11-17 11:17:29,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-17 11:17:29,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-17 11:17:29,518 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-11-17 11:17:29,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2023-11-17 11:17:29,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:29,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:17:29,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:29,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1921239475, now seen corresponding path program 1 times [2023-11-17 11:17:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161646214] [2023-11-17 11:17:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161646214] [2023-11-17 11:17:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161646214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:17:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085599617] [2023-11-17 11:17:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:17:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:17:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:17:29,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 77 [2023-11-17 11:17:29,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-17 11:17:29,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:29,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 77 [2023-11-17 11:17:29,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:30,235 INFO L124 PetriNetUnfolderBase]: 4542/7767 cut-off events. [2023-11-17 11:17:30,235 INFO L125 PetriNetUnfolderBase]: For 2168/2425 co-relation queries the response was YES. [2023-11-17 11:17:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17537 conditions, 7767 events. 4542/7767 cut-off events. For 2168/2425 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 58799 event pairs, 1447 based on Foata normal form. 888/7749 useless extension candidates. Maximal degree in co-relation 13420. Up to 3398 conditions per place. [2023-11-17 11:17:30,287 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-17 11:17:30,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-11-17 11:17:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:17:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:17:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-17 11:17:30,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-17 11:17:30,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-17 11:17:30,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-17 11:17:30,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:30,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-17 11:17:30,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2023-11-17 11:17:30,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-11-17 11:17:30,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2023-11-17 11:17:30,292 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 126 transitions. [2023-11-17 11:17:30,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-11-17 11:17:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:17:30,305 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-11-17 11:17:30,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-11-17 11:17:30,306 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-11-17 11:17:30,306 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-11-17 11:17:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-17 11:17:30,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:30,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:30,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:17:30,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:30,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash -592456175, now seen corresponding path program 2 times [2023-11-17 11:17:30,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:30,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418461665] [2023-11-17 11:17:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:30,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:30,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418461665] [2023-11-17 11:17:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418461665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:30,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:30,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:17:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251113708] [2023-11-17 11:17:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:30,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:17:30,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:17:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:17:30,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 77 [2023-11-17 11:17:30,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-11-17 11:17:30,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:30,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 77 [2023-11-17 11:17:30,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:30,781 INFO L124 PetriNetUnfolderBase]: 2096/4159 cut-off events. [2023-11-17 11:17:30,782 INFO L125 PetriNetUnfolderBase]: For 3381/3474 co-relation queries the response was YES. [2023-11-17 11:17:30,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10166 conditions, 4159 events. 2096/4159 cut-off events. For 3381/3474 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32331 event pairs, 491 based on Foata normal form. 473/4232 useless extension candidates. Maximal degree in co-relation 8743. Up to 1348 conditions per place. [2023-11-17 11:17:30,801 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 56 selfloop transitions, 7 changer transitions 16/110 dead transitions. [2023-11-17 11:17:30,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 110 transitions, 551 flow [2023-11-17 11:17:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:17:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:17:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2023-11-17 11:17:30,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2023-11-17 11:17:30,803 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 170 transitions. [2023-11-17 11:17:30,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 170 transitions. [2023-11-17 11:17:30,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:30,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 170 transitions. [2023-11-17 11:17:30,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.5) internal successors, (170), 4 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) [2023-11-17 11:17:30,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 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) [2023-11-17 11:17:30,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 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) [2023-11-17 11:17:30,805 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 170 transitions. [2023-11-17 11:17:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 110 transitions, 551 flow [2023-11-17 11:17:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:17:30,814 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-11-17 11:17:30,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-11-17 11:17:30,815 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-11-17 11:17:30,816 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-11-17 11:17:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-11-17 11:17:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:17:30,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1524400156, now seen corresponding path program 1 times [2023-11-17 11:17:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:30,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916415411] [2023-11-17 11:17:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:30,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916415411] [2023-11-17 11:17:30,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916415411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:30,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:30,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:17:30,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191688673] [2023-11-17 11:17:30,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:30,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:17:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:17:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:17:30,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2023-11-17 11:17:30,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:17:30,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:30,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2023-11-17 11:17:30,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:31,502 INFO L124 PetriNetUnfolderBase]: 4284/7435 cut-off events. [2023-11-17 11:17:31,502 INFO L125 PetriNetUnfolderBase]: For 6446/6446 co-relation queries the response was YES. [2023-11-17 11:17:31,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 7435 events. 4284/7435 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 49329 event pairs, 685 based on Foata normal form. 0/7321 useless extension candidates. Maximal degree in co-relation 18489. Up to 2651 conditions per place. [2023-11-17 11:17:31,524 INFO L140 encePairwiseOnDemand]: 67/77 looper letters, 153 selfloop transitions, 43 changer transitions 38/234 dead transitions. [2023-11-17 11:17:31,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 1453 flow [2023-11-17 11:17:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:17:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:17:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2023-11-17 11:17:31,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-17 11:17:31,526 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 308 transitions. [2023-11-17 11:17:31,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 308 transitions. [2023-11-17 11:17:31,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:31,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 308 transitions. [2023-11-17 11:17:31,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2023-11-17 11:17:31,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:31,528 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:31,528 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 308 transitions. [2023-11-17 11:17:31,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 1453 flow [2023-11-17 11:17:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 234 transitions, 1437 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-17 11:17:31,540 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-11-17 11:17:31,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-11-17 11:17:31,541 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-11-17 11:17:31,541 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-11-17 11:17:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:17:31,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:31,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:17:31,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:31,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1944742209, now seen corresponding path program 1 times [2023-11-17 11:17:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:31,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721421563] [2023-11-17 11:17:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:31,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721421563] [2023-11-17 11:17:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721421563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:31,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:31,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:17:31,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221117498] [2023-11-17 11:17:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:31,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:17:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:17:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:17:31,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2023-11-17 11:17:31,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2023-11-17 11:17:31,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:31,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2023-11-17 11:17:31,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:32,241 INFO L124 PetriNetUnfolderBase]: 4028/7069 cut-off events. [2023-11-17 11:17:32,242 INFO L125 PetriNetUnfolderBase]: For 10167/10167 co-relation queries the response was YES. [2023-11-17 11:17:32,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23457 conditions, 7069 events. 4028/7069 cut-off events. For 10167/10167 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 46765 event pairs, 874 based on Foata normal form. 70/7139 useless extension candidates. Maximal degree in co-relation 21645. Up to 3013 conditions per place. [2023-11-17 11:17:32,263 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 134 selfloop transitions, 46 changer transitions 22/202 dead transitions. [2023-11-17 11:17:32,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 202 transitions, 1488 flow [2023-11-17 11:17:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:17:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:17:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 245 transitions. [2023-11-17 11:17:32,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-17 11:17:32,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 245 transitions. [2023-11-17 11:17:32,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 245 transitions. [2023-11-17 11:17:32,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:32,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 245 transitions. [2023-11-17 11:17:32,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-17 11:17:32,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 77.0) internal successors, (616), 8 states have internal predecessors, (616), 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) [2023-11-17 11:17:32,267 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 77.0) internal successors, (616), 8 states have internal predecessors, (616), 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) [2023-11-17 11:17:32,267 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 245 transitions. [2023-11-17 11:17:32,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 202 transitions, 1488 flow [2023-11-17 11:17:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 202 transitions, 1486 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:17:32,299 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-11-17 11:17:32,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-11-17 11:17:32,300 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-11-17 11:17:32,301 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-11-17 11:17:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2023-11-17 11:17:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:32,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:17:32,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1931854795, now seen corresponding path program 1 times [2023-11-17 11:17:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420615340] [2023-11-17 11:17:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420615340] [2023-11-17 11:17:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420615340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:32,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:32,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:17:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255806933] [2023-11-17 11:17:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:17:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:17:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:17:32,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 77 [2023-11-17 11:17:32,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2023-11-17 11:17:32,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:32,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 77 [2023-11-17 11:17:32,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:32,915 INFO L124 PetriNetUnfolderBase]: 3495/6410 cut-off events. [2023-11-17 11:17:32,915 INFO L125 PetriNetUnfolderBase]: For 12024/12024 co-relation queries the response was YES. [2023-11-17 11:17:32,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22381 conditions, 6410 events. 3495/6410 cut-off events. For 12024/12024 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 44309 event pairs, 706 based on Foata normal form. 78/6488 useless extension candidates. Maximal degree in co-relation 20942. Up to 2422 conditions per place. [2023-11-17 11:17:32,944 INFO L140 encePairwiseOnDemand]: 67/77 looper letters, 140 selfloop transitions, 52 changer transitions 29/224 dead transitions. [2023-11-17 11:17:32,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 224 transitions, 1795 flow [2023-11-17 11:17:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:17:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:17:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2023-11-17 11:17:32,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2023-11-17 11:17:32,946 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 288 transitions. [2023-11-17 11:17:32,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 288 transitions. [2023-11-17 11:17:32,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:32,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 288 transitions. [2023-11-17 11:17:32,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 32.0) internal successors, (288), 9 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) [2023-11-17 11:17:32,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:32,947 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:32,947 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 288 transitions. [2023-11-17 11:17:32,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 224 transitions, 1795 flow [2023-11-17 11:17:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 224 transitions, 1771 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:17:32,993 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 972 flow [2023-11-17 11:17:32,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=972, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2023-11-17 11:17:32,993 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-11-17 11:17:32,994 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 972 flow [2023-11-17 11:17:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2023-11-17 11:17:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:32,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:17:32,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:32,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1602435263, now seen corresponding path program 1 times [2023-11-17 11:17:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015573498] [2023-11-17 11:17:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:32,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:17:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:17:33,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:17:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015573498] [2023-11-17 11:17:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015573498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:17:33,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:17:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:17:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226578581] [2023-11-17 11:17:33,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:17:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:17:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:17:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:17:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:17:33,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 77 [2023-11-17 11:17:33,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 972 flow. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 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) [2023-11-17 11:17:33,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:17:33,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 77 [2023-11-17 11:17:33,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:17:33,574 INFO L124 PetriNetUnfolderBase]: 1812/4165 cut-off events. [2023-11-17 11:17:33,574 INFO L125 PetriNetUnfolderBase]: For 12079/12245 co-relation queries the response was YES. [2023-11-17 11:17:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14974 conditions, 4165 events. 1812/4165 cut-off events. For 12079/12245 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34206 event pairs, 495 based on Foata normal form. 254/4324 useless extension candidates. Maximal degree in co-relation 14122. Up to 1337 conditions per place. [2023-11-17 11:17:33,595 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 73 selfloop transitions, 11 changer transitions 48/186 dead transitions. [2023-11-17 11:17:33,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 186 transitions, 1544 flow [2023-11-17 11:17:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:17:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:17:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 302 transitions. [2023-11-17 11:17:33,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357864357864358 [2023-11-17 11:17:33,596 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 302 transitions. [2023-11-17 11:17:33,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 302 transitions. [2023-11-17 11:17:33,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:17:33,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 302 transitions. [2023-11-17 11:17:33,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 33.55555555555556) internal successors, (302), 9 states have internal predecessors, (302), 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) [2023-11-17 11:17:33,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:33,598 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 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) [2023-11-17 11:17:33,599 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 972 flow. Second operand 9 states and 302 transitions. [2023-11-17 11:17:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 186 transitions, 1544 flow [2023-11-17 11:17:33,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 186 transitions, 1502 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 11:17:33,642 INFO L231 Difference]: Finished difference. Result has 103 places, 107 transitions, 877 flow [2023-11-17 11:17:33,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=877, PETRI_PLACES=103, PETRI_TRANSITIONS=107} [2023-11-17 11:17:33,642 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2023-11-17 11:17:33,642 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 107 transitions, 877 flow [2023-11-17 11:17:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 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) [2023-11-17 11:17:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:17:33,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:17:33,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:17:33,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:17:33,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:17:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 484657159, now seen corresponding path program 2 times [2023-11-17 11:17:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:17:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616470325] [2023-11-17 11:17:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:17:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:17:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:33,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:17:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:17:33,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:17:33,684 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:17:33,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-17 11:17:33,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:17:33,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-17 11:17:33,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-17 11:17:33,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-17 11:17:33,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-17 11:17:33,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:17:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:17:33,687 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-17 11:17:33,691 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 11:17:33,691 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 11:17:33,710 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-17 11:17:33,711 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-17 11:17:33,717 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-17 11:17:33,717 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-17 11:17:33,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 11:17:33 BasicIcfg [2023-11-17 11:17:33,723 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 11:17:33,724 INFO L158 Benchmark]: Toolchain (without parser) took 8091.64ms. Allocated memory was 270.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 218.1MB in the beginning and 1.1GB in the end (delta: -863.3MB). Peak memory consumption was 306.2MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,724 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 213.9MB. Free memory was 164.8MB in the beginning and 164.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:17:33,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.54ms. Allocated memory is still 270.5MB. Free memory was 217.8MB in the beginning and 197.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,724 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.90ms. Allocated memory is still 270.5MB. Free memory was 197.5MB in the beginning and 195.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,724 INFO L158 Benchmark]: Boogie Preprocessor took 31.83ms. Allocated memory is still 270.5MB. Free memory was 195.4MB in the beginning and 194.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,725 INFO L158 Benchmark]: RCFGBuilder took 436.10ms. Allocated memory is still 270.5MB. Free memory was 194.0MB in the beginning and 228.5MB in the end (delta: -34.5MB). Peak memory consumption was 21.9MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,725 INFO L158 Benchmark]: TraceAbstraction took 7170.78ms. Allocated memory was 270.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 227.9MB in the beginning and 1.1GB in the end (delta: -853.5MB). Peak memory consumption was 315.7MB. Max. memory is 8.0GB. [2023-11-17 11:17:33,726 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 213.9MB. Free memory was 164.8MB in the beginning and 164.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 395.54ms. Allocated memory is still 270.5MB. Free memory was 217.8MB in the beginning and 197.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.90ms. Allocated memory is still 270.5MB. Free memory was 197.5MB in the beginning and 195.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.83ms. Allocated memory is still 270.5MB. Free memory was 195.4MB in the beginning and 194.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 436.10ms. Allocated memory is still 270.5MB. Free memory was 194.0MB in the beginning and 228.5MB in the end (delta: -34.5MB). Peak memory consumption was 21.9MB. Max. memory is 8.0GB. * TraceAbstraction took 7170.78ms. Allocated memory was 270.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 227.9MB in the beginning and 1.1GB in the end (delta: -853.5MB). Peak memory consumption was 315.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.5s, 62 PlacesBefore, 50 PlacesAfterwards, 51 TransitionsBefore, 37 TransitionsAfterwards, 1412 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 16 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 20 TotalNumberOfCompositions, 3508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1990, independent: 1893, independent conditional: 0, independent unconditional: 1893, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1097, independent: 1048, independent conditional: 0, independent unconditional: 1048, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1097, independent: 1036, independent conditional: 0, independent unconditional: 1036, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 61, independent: 12, independent conditional: 0, independent unconditional: 12, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 95, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1990, independent: 845, independent conditional: 0, independent unconditional: 845, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 1097, unknown conditional: 0, unknown unconditional: 1097] , Statistics on independence cache: Total cache size (in pairs): 423, Positive cache size: 389, Positive conditional cache size: 0, Positive unconditional cache size: 389, Negative cache size: 34, Negative conditional cache size: 0, Negative unconditional cache size: 34, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1={5:0}, t2={6:0}, t3={7:0}, t4={3:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1={5:0}, t2={6:0}, t3={7:0}, t4={3:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1={5:0}, t2={6:0}, t3={7:0}, t4={3:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=0, t1={5:0}, t2={6:0}, t3={7:0}, t4={3:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 79 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.0s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 582 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 582 mSDsluCounter, 105 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 43 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1573 IncrementalHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 62 mSDtfsCounter, 1573 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=972occurred in iteration=6, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 173 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-17 11:17:33,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...