/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:42:56,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:42:56,827 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 22:42:56,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:42:56,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:42:56,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:42:56,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:42:56,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:42:56,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:42:56,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:42:56,860 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:42:56,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:42:56,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:42:56,862 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:42:56,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:42:56,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:42:56,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:42:56,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:42:56,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:42:56,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:42:56,863 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:42:56,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:42:56,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:42:56,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:42:56,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:42:56,864 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:42:56,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:42:56,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:42:56,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:42:56,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:42:56,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:42:56,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:42:56,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:42:56,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:42:56,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:42:56,867 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:42:57,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:42:57,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:42:57,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:42:57,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:42:57,132 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:42:57,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2023-08-23 22:42:58,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:42:58,325 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:42:58,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2023-08-23 22:42:58,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bec22b497/60359262ee9043fb9856df3ece86a546/FLAG1a75e1500 [2023-08-23 22:42:58,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bec22b497/60359262ee9043fb9856df3ece86a546 [2023-08-23 22:42:58,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:42:58,348 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:42:58,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:42:58,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:42:58,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:42:58,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f9f729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58, skipping insertion in model container [2023-08-23 22:42:58,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,379 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:42:58,523 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:42:58,637 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-1.i[31246,31259] [2023-08-23 22:42:58,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:42:58,655 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:42:58,672 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:42:58,680 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-23 22:42:58,682 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-23 22:42:58,690 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-1.i[31246,31259] [2023-08-23 22:42:58,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:42:58,722 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:42:58,722 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:42:58,722 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:42:58,727 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:42:58,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58 WrapperNode [2023-08-23 22:42:58,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:42:58,728 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:42:58,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:42:58,729 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:42:58,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,782 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 114 [2023-08-23 22:42:58,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:42:58,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:42:58,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:42:58,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:42:58,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,807 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:42:58,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:42:58,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:42:58,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:42:58,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (1/1) ... [2023-08-23 22:42:58,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:42:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:58,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-23 22:42:58,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-23 22:42:58,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-23 22:42:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:42:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:42:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:42:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:42:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:42:58,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:42:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-23 22:42:58,918 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-23 22:42:58,919 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:42:59,029 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:42:59,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:42:59,140 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:42:59,161 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:42:59,161 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-23 22:42:59,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:42:59 BoogieIcfgContainer [2023-08-23 22:42:59,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:42:59,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:42:59,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:42:59,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:42:59,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:42:58" (1/3) ... [2023-08-23 22:42:59,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f7b1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:42:59, skipping insertion in model container [2023-08-23 22:42:59,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:42:58" (2/3) ... [2023-08-23 22:42:59,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f7b1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:42:59, skipping insertion in model container [2023-08-23 22:42:59,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:42:59" (3/3) ... [2023-08-23 22:42:59,168 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2023-08-23 22:42:59,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:42:59,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:42:59,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:42:59,281 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-23 22:42:59,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 108 transitions, 248 flow [2023-08-23 22:42:59,364 INFO L124 PetriNetUnfolderBase]: 2/104 cut-off events. [2023-08-23 22:42:59,365 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-23 22:42:59,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 104 events. 2/104 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-08-23 22:42:59,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 108 transitions, 248 flow [2023-08-23 22:42:59,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 91 transitions, 203 flow [2023-08-23 22:42:59,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:42:59,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 91 transitions, 203 flow [2023-08-23 22:42:59,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 91 transitions, 203 flow [2023-08-23 22:42:59,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 91 transitions, 203 flow [2023-08-23 22:42:59,407 INFO L124 PetriNetUnfolderBase]: 2/91 cut-off events. [2023-08-23 22:42:59,407 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-23 22:42:59,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 91 events. 2/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-08-23 22:42:59,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-08-23 22:43:01,891 INFO L134 LiptonReduction]: Checked pairs total: 8945 [2023-08-23 22:43:01,891 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-23 22:43:01,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:43:01,904 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@778523ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:43:01,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:43:01,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:43:01,908 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-23 22:43:01,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:43:01,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:01,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:01,908 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)] === [2023-08-23 22:43:01,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1113232104, now seen corresponding path program 1 times [2023-08-23 22:43:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383443728] [2023-08-23 22:43:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:02,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383443728] [2023-08-23 22:43:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383443728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:02,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:02,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065995867] [2023-08-23 22:43:02,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:02,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:02,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:02,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-23 22:43:02,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:02,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:02,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-23 22:43:02,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:03,523 INFO L124 PetriNetUnfolderBase]: 17447/24372 cut-off events. [2023-08-23 22:43:03,523 INFO L125 PetriNetUnfolderBase]: For 2370/2370 co-relation queries the response was YES. [2023-08-23 22:43:03,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50018 conditions, 24372 events. 17447/24372 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 136289 event pairs, 3315 based on Foata normal form. 832/22984 useless extension candidates. Maximal degree in co-relation 39022. Up to 11107 conditions per place. [2023-08-23 22:43:03,602 INFO L140 encePairwiseOnDemand]: 161/171 looper letters, 134 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2023-08-23 22:43:03,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 152 transitions, 686 flow [2023-08-23 22:43:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:43:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:43:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 701 transitions. [2023-08-23 22:43:03,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856307435254804 [2023-08-23 22:43:03,612 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 701 transitions. [2023-08-23 22:43:03,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 701 transitions. [2023-08-23 22:43:03,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:03,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 701 transitions. [2023-08-23 22:43:03,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.14285714285714) internal successors, (701), 7 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:03,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:03,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:03,623 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 99 flow. Second operand 7 states and 701 transitions. [2023-08-23 22:43:03,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 152 transitions, 686 flow [2023-08-23 22:43:03,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 152 transitions, 639 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-23 22:43:03,640 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 184 flow [2023-08-23 22:43:03,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-23 22:43:03,644 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-23 22:43:03,644 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 184 flow [2023-08-23 22:43:03,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:03,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:03,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:43:03,645 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)] === [2023-08-23 22:43:03,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1463498058, now seen corresponding path program 1 times [2023-08-23 22:43:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643283149] [2023-08-23 22:43:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:03,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643283149] [2023-08-23 22:43:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643283149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:03,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530752849] [2023-08-23 22:43:03,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:43:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:43:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:43:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 171 [2023-08-23 22:43:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 171 [2023-08-23 22:43:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:04,214 INFO L124 PetriNetUnfolderBase]: 3521/6234 cut-off events. [2023-08-23 22:43:04,214 INFO L125 PetriNetUnfolderBase]: For 1594/1710 co-relation queries the response was YES. [2023-08-23 22:43:04,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13346 conditions, 6234 events. 3521/6234 cut-off events. For 1594/1710 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 48950 event pairs, 1266 based on Foata normal form. 618/6051 useless extension candidates. Maximal degree in co-relation 8713. Up to 2671 conditions per place. [2023-08-23 22:43:04,244 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 38 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-23 22:43:04,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 310 flow [2023-08-23 22:43:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:43:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:43:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-23 22:43:04,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101364522417154 [2023-08-23 22:43:04,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-23 22:43:04,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-23 22:43:04,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:04,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-23 22:43:04,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,248 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 184 flow. Second operand 3 states and 313 transitions. [2023-08-23 22:43:04,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 310 flow [2023-08-23 22:43:04,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:04,261 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 200 flow [2023-08-23 22:43:04,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-08-23 22:43:04,262 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-23 22:43:04,262 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 200 flow [2023-08-23 22:43:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:04,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:04,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:43:04,263 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)] === [2023-08-23 22:43:04,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1547960262, now seen corresponding path program 2 times [2023-08-23 22:43:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:04,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440104467] [2023-08-23 22:43:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440104467] [2023-08-23 22:43:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440104467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:43:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556838859] [2023-08-23 22:43:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:04,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:43:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:43:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:43:04,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-08-23 22:43:04,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:04,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-08-23 22:43:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:04,595 INFO L124 PetriNetUnfolderBase]: 1378/3038 cut-off events. [2023-08-23 22:43:04,595 INFO L125 PetriNetUnfolderBase]: For 2119/2156 co-relation queries the response was YES. [2023-08-23 22:43:04,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7163 conditions, 3038 events. 1378/3038 cut-off events. For 2119/2156 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24605 event pairs, 358 based on Foata normal form. 215/2923 useless extension candidates. Maximal degree in co-relation 5162. Up to 1013 conditions per place. [2023-08-23 22:43:04,605 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 52 selfloop transitions, 9 changer transitions 5/93 dead transitions. [2023-08-23 22:43:04,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 452 flow [2023-08-23 22:43:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 22:43:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 22:43:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-08-23 22:43:04,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2023-08-23 22:43:04,606 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-08-23 22:43:04,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-08-23 22:43:04,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:04,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-08-23 22:43:04,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,609 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 200 flow. Second operand 4 states and 432 transitions. [2023-08-23 22:43:04,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 452 flow [2023-08-23 22:43:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 93 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:43:04,616 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 258 flow [2023-08-23 22:43:04,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-23 22:43:04,617 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2023-08-23 22:43:04,619 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 258 flow [2023-08-23 22:43:04,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:04,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:04,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:43:04,620 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)] === [2023-08-23 22:43:04,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1560868813, now seen corresponding path program 1 times [2023-08-23 22:43:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:04,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640678603] [2023-08-23 22:43:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:04,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640678603] [2023-08-23 22:43:04,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640678603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:04,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:04,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258213850] [2023-08-23 22:43:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:04,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:04,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-23 22:43:04,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:04,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:04,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-23 22:43:04,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:05,214 INFO L124 PetriNetUnfolderBase]: 3858/6669 cut-off events. [2023-08-23 22:43:05,214 INFO L125 PetriNetUnfolderBase]: For 6248/6248 co-relation queries the response was YES. [2023-08-23 22:43:05,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19094 conditions, 6669 events. 3858/6669 cut-off events. For 6248/6248 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43437 event pairs, 831 based on Foata normal form. 0/6465 useless extension candidates. Maximal degree in co-relation 14955. Up to 2733 conditions per place. [2023-08-23 22:43:05,231 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 131 selfloop transitions, 36 changer transitions 17/184 dead transitions. [2023-08-23 22:43:05,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 184 transitions, 1166 flow [2023-08-23 22:43:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:43:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:43:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2023-08-23 22:43:05,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680868838763575 [2023-08-23 22:43:05,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2023-08-23 22:43:05,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2023-08-23 22:43:05,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:05,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2023-08-23 22:43:05,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,237 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 258 flow. Second operand 7 states and 680 transitions. [2023-08-23 22:43:05,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 184 transitions, 1166 flow [2023-08-23 22:43:05,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 184 transitions, 1166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:05,248 INFO L231 Difference]: Finished difference. Result has 69 places, 84 transitions, 516 flow [2023-08-23 22:43:05,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=69, PETRI_TRANSITIONS=84} [2023-08-23 22:43:05,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-08-23 22:43:05,249 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 84 transitions, 516 flow [2023-08-23 22:43:05,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:05,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:05,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:43:05,250 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)] === [2023-08-23 22:43:05,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -472286317, now seen corresponding path program 1 times [2023-08-23 22:43:05,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433538131] [2023-08-23 22:43:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:05,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:05,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433538131] [2023-08-23 22:43:05,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433538131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:05,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:05,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:05,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099149439] [2023-08-23 22:43:05,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-23 22:43:05,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 84 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:05,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-23 22:43:05,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:05,734 INFO L124 PetriNetUnfolderBase]: 3306/5825 cut-off events. [2023-08-23 22:43:05,734 INFO L125 PetriNetUnfolderBase]: For 7921/7921 co-relation queries the response was YES. [2023-08-23 22:43:05,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18862 conditions, 5825 events. 3306/5825 cut-off events. For 7921/7921 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37754 event pairs, 701 based on Foata normal form. 58/5883 useless extension candidates. Maximal degree in co-relation 16220. Up to 2373 conditions per place. [2023-08-23 22:43:05,758 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 113 selfloop transitions, 38 changer transitions 5/156 dead transitions. [2023-08-23 22:43:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 156 transitions, 1142 flow [2023-08-23 22:43:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 576 transitions. [2023-08-23 22:43:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-08-23 22:43:05,760 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 576 transitions. [2023-08-23 22:43:05,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 576 transitions. [2023-08-23 22:43:05,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:05,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 576 transitions. [2023-08-23 22:43:05,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,763 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,763 INFO L175 Difference]: Start difference. First operand has 69 places, 84 transitions, 516 flow. Second operand 6 states and 576 transitions. [2023-08-23 22:43:05,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 156 transitions, 1142 flow [2023-08-23 22:43:05,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 156 transitions, 1128 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-23 22:43:05,784 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 634 flow [2023-08-23 22:43:05,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2023-08-23 22:43:05,785 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-08-23 22:43:05,785 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 634 flow [2023-08-23 22:43:05,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:05,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:43:05,786 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)] === [2023-08-23 22:43:05,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -486096312, now seen corresponding path program 1 times [2023-08-23 22:43:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189506304] [2023-08-23 22:43:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189506304] [2023-08-23 22:43:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189506304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:05,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:05,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:05,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788095716] [2023-08-23 22:43:05,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:05,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:05,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:05,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-23 22:43:05,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:05,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-23 22:43:05,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:06,277 INFO L124 PetriNetUnfolderBase]: 3200/5653 cut-off events. [2023-08-23 22:43:06,277 INFO L125 PetriNetUnfolderBase]: For 9412/9412 co-relation queries the response was YES. [2023-08-23 22:43:06,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19230 conditions, 5653 events. 3200/5653 cut-off events. For 9412/9412 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36924 event pairs, 723 based on Foata normal form. 66/5719 useless extension candidates. Maximal degree in co-relation 17043. Up to 2353 conditions per place. [2023-08-23 22:43:06,298 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 118 selfloop transitions, 39 changer transitions 7/164 dead transitions. [2023-08-23 22:43:06,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 164 transitions, 1281 flow [2023-08-23 22:43:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:43:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:43:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 583 transitions. [2023-08-23 22:43:06,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682261208576999 [2023-08-23 22:43:06,299 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 583 transitions. [2023-08-23 22:43:06,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 583 transitions. [2023-08-23 22:43:06,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:06,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 583 transitions. [2023-08-23 22:43:06,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.16666666666667) internal successors, (583), 6 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,302 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,302 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 634 flow. Second operand 6 states and 583 transitions. [2023-08-23 22:43:06,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 164 transitions, 1281 flow [2023-08-23 22:43:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 164 transitions, 1220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 22:43:06,330 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 707 flow [2023-08-23 22:43:06,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=707, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-08-23 22:43:06,331 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2023-08-23 22:43:06,331 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 707 flow [2023-08-23 22:43:06,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:06,331 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] [2023-08-23 22:43:06,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:43:06,331 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)] === [2023-08-23 22:43:06,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash -184054503, now seen corresponding path program 1 times [2023-08-23 22:43:06,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:06,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109615678] [2023-08-23 22:43:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:06,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109615678] [2023-08-23 22:43:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109615678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:06,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061514823] [2023-08-23 22:43:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:06,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-08-23 22:43:06,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 707 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:06,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-08-23 22:43:06,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:06,575 INFO L124 PetriNetUnfolderBase]: 625/2070 cut-off events. [2023-08-23 22:43:06,575 INFO L125 PetriNetUnfolderBase]: For 4540/4689 co-relation queries the response was YES. [2023-08-23 22:43:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6803 conditions, 2070 events. 625/2070 cut-off events. For 4540/4689 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18158 event pairs, 269 based on Foata normal form. 197/2219 useless extension candidates. Maximal degree in co-relation 6428. Up to 728 conditions per place. [2023-08-23 22:43:06,585 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 7 changer transitions 20/111 dead transitions. [2023-08-23 22:43:06,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 814 flow [2023-08-23 22:43:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:43:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:43:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-08-23 22:43:06,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2023-08-23 22:43:06,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-08-23 22:43:06,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-08-23 22:43:06,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:06,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-08-23 22:43:06,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,589 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 707 flow. Second operand 5 states and 515 transitions. [2023-08-23 22:43:06,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 814 flow [2023-08-23 22:43:06,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 771 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 22:43:06,604 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 520 flow [2023-08-23 22:43:06,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-08-23 22:43:06,605 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2023-08-23 22:43:06,605 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 520 flow [2023-08-23 22:43:06,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:06,605 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] [2023-08-23 22:43:06,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:43:06,606 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)] === [2023-08-23 22:43:06,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1690172749, now seen corresponding path program 2 times [2023-08-23 22:43:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:06,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570619404] [2023-08-23 22:43:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570619404] [2023-08-23 22:43:06,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570619404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:06,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:43:06,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:43:06,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875624505] [2023-08-23 22:43:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:06,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:43:06,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:43:06,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:43:06,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-08-23 22:43:06,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:06,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-08-23 22:43:06,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:06,761 INFO L124 PetriNetUnfolderBase]: 260/983 cut-off events. [2023-08-23 22:43:06,761 INFO L125 PetriNetUnfolderBase]: For 2558/2558 co-relation queries the response was YES. [2023-08-23 22:43:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 983 events. 260/983 cut-off events. For 2558/2558 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7018 event pairs, 100 based on Foata normal form. 22/993 useless extension candidates. Maximal degree in co-relation 3332. Up to 289 conditions per place. [2023-08-23 22:43:06,764 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2023-08-23 22:43:06,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 450 flow [2023-08-23 22:43:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:43:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:43:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-08-23 22:43:06,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.591812865497076 [2023-08-23 22:43:06,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-08-23 22:43:06,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-08-23 22:43:06,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:06,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-08-23 22:43:06,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,767 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 520 flow. Second operand 5 states and 506 transitions. [2023-08-23 22:43:06,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 450 flow [2023-08-23 22:43:06,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 382 flow, removed 1 selfloop flow, removed 16 redundant places. [2023-08-23 22:43:06,774 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-23 22:43:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-23 22:43:06,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-08-23 22:43:06,775 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-23 22:43:06,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-23 22:43:06,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-23 22:43:06,778 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-23 22:43:06,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:43:06,778 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-23 22:43:06,783 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:43:06,784 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:43:06,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:43:06 BasicIcfg [2023-08-23 22:43:06,792 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:43:06,793 INFO L158 Benchmark]: Toolchain (without parser) took 8445.08ms. Allocated memory was 364.9MB in the beginning and 906.0MB in the end (delta: 541.1MB). Free memory was 340.4MB in the beginning and 377.8MB in the end (delta: -37.4MB). Peak memory consumption was 508.7MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,793 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 364.9MB. Free memory is still 342.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:43:06,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 379.18ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 319.3MB in the end (delta: 21.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,793 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.88ms. Allocated memory is still 364.9MB. Free memory was 319.3MB in the beginning and 317.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,793 INFO L158 Benchmark]: Boogie Preprocessor took 27.41ms. Allocated memory is still 364.9MB. Free memory was 317.2MB in the beginning and 315.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,793 INFO L158 Benchmark]: RCFGBuilder took 351.23ms. Allocated memory is still 364.9MB. Free memory was 315.6MB in the beginning and 299.3MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,794 INFO L158 Benchmark]: TraceAbstraction took 7628.09ms. Allocated memory was 364.9MB in the beginning and 906.0MB in the end (delta: 541.1MB). Free memory was 298.8MB in the beginning and 377.8MB in the end (delta: -79.0MB). Peak memory consumption was 464.7MB. Max. memory is 16.0GB. [2023-08-23 22:43:06,795 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 364.9MB. Free memory is still 342.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 379.18ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 319.3MB in the end (delta: 21.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 54.88ms. Allocated memory is still 364.9MB. Free memory was 319.3MB in the beginning and 317.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.41ms. Allocated memory is still 364.9MB. Free memory was 317.2MB in the beginning and 315.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 351.23ms. Allocated memory is still 364.9MB. Free memory was 315.6MB in the beginning and 299.3MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 7628.09ms. Allocated memory was 364.9MB in the beginning and 906.0MB in the end (delta: 541.1MB). Free memory was 298.8MB in the beginning and 377.8MB in the end (delta: -79.0MB). Peak memory consumption was 464.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 102 PlacesBefore, 50 PlacesAfterwards, 91 TransitionsBefore, 39 TransitionsAfterwards, 2408 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 63 TotalNumberOfCompositions, 8945 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6167, independent: 5913, independent conditional: 0, independent unconditional: 5913, dependent: 254, dependent conditional: 0, dependent unconditional: 254, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1392, independent: 1358, independent conditional: 0, independent unconditional: 1358, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6167, independent: 4555, independent conditional: 0, independent unconditional: 4555, dependent: 220, dependent conditional: 0, dependent unconditional: 220, unknown: 1392, unknown conditional: 0, unknown unconditional: 1392] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 286, Positive conditional cache size: 0, Positive unconditional cache size: 286, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 739]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 132 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: 7.5s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 476 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 476 mSDsluCounter, 69 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1311 IncrementalHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 45 mSDtfsCounter, 1311 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=707occurred in iteration=6, InterpolantAutomatonStates: 43, 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, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-23 22:43:06,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...