/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:51:19,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:51:19,864 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 [2023-08-26 20:51:19,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:51:19,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:51:19,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:51:19,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:51:19,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:51:19,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:51:19,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:51:19,908 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:51:19,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:51:19,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:51:19,909 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:51:19,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:51:19,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:51:19,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:51:19,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:51:19,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:51:19,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:51:19,911 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:51:19,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:51:19,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:51:19,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:51:19,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:51:19,913 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:51:19,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:51:19,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:19,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:51:19,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:51:19,915 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 20:51:20,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:51:20,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:51:20,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:51:20,232 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:51:20,233 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:51:20,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-26 20:51:21,402 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:51:21,620 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:51:21,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-26 20:51:21,638 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57b9bdf3/72d5cc1b083748fa87844f6366ffe1ed/FLAG124ab00b9 [2023-08-26 20:51:21,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57b9bdf3/72d5cc1b083748fa87844f6366ffe1ed [2023-08-26 20:51:21,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:51:21,656 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:51:21,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:21,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:51:21,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:51:21,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:21" (1/1) ... [2023-08-26 20:51:21,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd0e363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:21, skipping insertion in model container [2023-08-26 20:51:21,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:21" (1/1) ... [2023-08-26 20:51:21,700 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:51:21,854 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:22,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:22,030 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:51:22,055 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 20:51:22,061 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 20:51:22,064 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 20:51:22,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:22,138 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:22,138 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:22,138 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:51:22,144 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:51:22,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22 WrapperNode [2023-08-26 20:51:22,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:22,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:22,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:51:22,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:51:22,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,206 INFO L138 Inliner]: procedures = 174, calls = 52, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 126 [2023-08-26 20:51:22,207 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:22,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:51:22,208 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:51:22,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:51:22,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:51:22,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:51:22,257 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:51:22,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:51:22,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (1/1) ... [2023-08-26 20:51:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:51:22,310 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) [2023-08-26 20:51:22,339 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 [2023-08-26 20:51:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-26 20:51:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:51:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:51:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:51:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:51:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-26 20:51:22,355 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-26 20:51:22,356 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:51:22,514 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:51:22,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:51:22,726 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:51:22,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:51:22,769 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:51:22,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:22 BoogieIcfgContainer [2023-08-26 20:51:22,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:51:22,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:51:22,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:51:22,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:51:22,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:51:21" (1/3) ... [2023-08-26 20:51:22,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4692f1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:22, skipping insertion in model container [2023-08-26 20:51:22,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:22" (2/3) ... [2023-08-26 20:51:22,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4692f1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:51:22, skipping insertion in model container [2023-08-26 20:51:22,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:51:22" (3/3) ... [2023-08-26 20:51:22,778 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-26 20:51:22,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:51:22,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 20:51:22,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:51:22,885 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 20:51:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 128 transitions, 288 flow [2023-08-26 20:51:22,990 INFO L124 PetriNetUnfolderBase]: 4/124 cut-off events. [2023-08-26 20:51:22,991 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:51:22,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 4/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-26 20:51:22,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 128 transitions, 288 flow [2023-08-26 20:51:23,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 111 transitions, 243 flow [2023-08-26 20:51:23,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:51:23,022 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 111 transitions, 243 flow [2023-08-26 20:51:23,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 111 transitions, 243 flow [2023-08-26 20:51:23,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 111 transitions, 243 flow [2023-08-26 20:51:23,071 INFO L124 PetriNetUnfolderBase]: 4/111 cut-off events. [2023-08-26 20:51:23,071 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 20:51:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 111 events. 4/111 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-26 20:51:23,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-26 20:51:25,884 INFO L134 LiptonReduction]: Checked pairs total: 11243 [2023-08-26 20:51:25,884 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 20:51:25,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:51:25,901 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;@3cf4e2c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:51:25,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-26 20:51:25,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:51:25,905 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-26 20:51:25,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:51:25,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:25,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:51:25,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:25,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 411473920, now seen corresponding path program 1 times [2023-08-26 20:51:25,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767456333] [2023-08-26 20:51:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767456333] [2023-08-26 20:51:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767456333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:51:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720918701] [2023-08-26 20:51:26,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:51:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:51:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:51:26,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 210 [2023-08-26 20:51:26,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:26,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:26,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 210 [2023-08-26 20:51:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:27,617 INFO L124 PetriNetUnfolderBase]: 10031/15582 cut-off events. [2023-08-26 20:51:27,617 INFO L125 PetriNetUnfolderBase]: For 1375/1375 co-relation queries the response was YES. [2023-08-26 20:51:27,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31297 conditions, 15582 events. 10031/15582 cut-off events. For 1375/1375 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 118007 event pairs, 4492 based on Foata normal form. 504/13049 useless extension candidates. Maximal degree in co-relation 23098. Up to 7966 conditions per place. [2023-08-26 20:51:27,741 INFO L140 encePairwiseOnDemand]: 194/210 looper letters, 55 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2023-08-26 20:51:27,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 300 flow [2023-08-26 20:51:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:51:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:51:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-26 20:51:27,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2023-08-26 20:51:27,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-26 20:51:27,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-26 20:51:27,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:27,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-26 20:51:27,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2023-08-26 20:51:27,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:27,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:27,769 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 113 flow. Second operand 3 states and 369 transitions. [2023-08-26 20:51:27,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 300 flow [2023-08-26 20:51:27,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 278 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 20:51:27,889 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 166 flow [2023-08-26 20:51:27,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-26 20:51:27,894 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-26 20:51:27,894 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 166 flow [2023-08-26 20:51:27,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:27,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:27,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:51:27,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:27,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1004908177, now seen corresponding path program 1 times [2023-08-26 20:51:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:27,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870247158] [2023-08-26 20:51:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870247158] [2023-08-26 20:51:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870247158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:28,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870069172] [2023-08-26 20:51:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:28,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:28,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 210 [2023-08-26 20:51:28,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-08-26 20:51:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 210 [2023-08-26 20:51:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:33,534 INFO L124 PetriNetUnfolderBase]: 62235/89012 cut-off events. [2023-08-26 20:51:33,535 INFO L125 PetriNetUnfolderBase]: For 30846/31628 co-relation queries the response was YES. [2023-08-26 20:51:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212104 conditions, 89012 events. 62235/89012 cut-off events. For 30846/31628 co-relation queries the response was YES. Maximal size of possible extension queue 2896. Compared 632330 event pairs, 9456 based on Foata normal form. 28/82347 useless extension candidates. Maximal degree in co-relation 67712. Up to 42409 conditions per place. [2023-08-26 20:51:34,075 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 227 selfloop transitions, 27 changer transitions 3/259 dead transitions. [2023-08-26 20:51:34,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 259 transitions, 1345 flow [2023-08-26 20:51:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:51:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:51:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1016 transitions. [2023-08-26 20:51:34,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375661375661376 [2023-08-26 20:51:34,083 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1016 transitions. [2023-08-26 20:51:34,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1016 transitions. [2023-08-26 20:51:34,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:34,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1016 transitions. [2023-08-26 20:51:34,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.88888888888889) internal successors, (1016), 9 states have internal predecessors, (1016), 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) [2023-08-26 20:51:34,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:34,093 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:34,093 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 166 flow. Second operand 9 states and 1016 transitions. [2023-08-26 20:51:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 259 transitions, 1345 flow [2023-08-26 20:51:34,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 259 transitions, 1273 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:34,909 INFO L231 Difference]: Finished difference. Result has 66 places, 78 transitions, 326 flow [2023-08-26 20:51:34,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=66, PETRI_TRANSITIONS=78} [2023-08-26 20:51:34,910 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 8 predicate places. [2023-08-26 20:51:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 78 transitions, 326 flow [2023-08-26 20:51:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-08-26 20:51:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:51:34,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:34,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -979226676, now seen corresponding path program 1 times [2023-08-26 20:51:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857307272] [2023-08-26 20:51:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857307272] [2023-08-26 20:51:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857307272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:34,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:51:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232604008] [2023-08-26 20:51:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:34,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 210 [2023-08-26 20:51:34,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 326 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-26 20:51:34,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:34,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 210 [2023-08-26 20:51:34,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:36,663 INFO L124 PetriNetUnfolderBase]: 16992/28171 cut-off events. [2023-08-26 20:51:36,664 INFO L125 PetriNetUnfolderBase]: For 14370/15330 co-relation queries the response was YES. [2023-08-26 20:51:36,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72507 conditions, 28171 events. 16992/28171 cut-off events. For 14370/15330 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 236263 event pairs, 5592 based on Foata normal form. 2686/27753 useless extension candidates. Maximal degree in co-relation 47693. Up to 15668 conditions per place. [2023-08-26 20:51:36,858 INFO L140 encePairwiseOnDemand]: 195/210 looper letters, 88 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2023-08-26 20:51:36,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 132 transitions, 714 flow [2023-08-26 20:51:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:51:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:51:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-26 20:51:36,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5845238095238096 [2023-08-26 20:51:36,860 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-26 20:51:36,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-26 20:51:36,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:36,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-26 20:51:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 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) [2023-08-26 20:51:36,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-26 20:51:36,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-26 20:51:36,865 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 326 flow. Second operand 4 states and 491 transitions. [2023-08-26 20:51:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 132 transitions, 714 flow [2023-08-26 20:51:36,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 132 transitions, 714 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:36,961 INFO L231 Difference]: Finished difference. Result has 71 places, 84 transitions, 415 flow [2023-08-26 20:51:36,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=71, PETRI_TRANSITIONS=84} [2023-08-26 20:51:36,962 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 13 predicate places. [2023-08-26 20:51:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 84 transitions, 415 flow [2023-08-26 20:51:36,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-26 20:51:36,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:51:36,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:36,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash -653682035, now seen corresponding path program 1 times [2023-08-26 20:51:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219852535] [2023-08-26 20:51:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:37,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219852535] [2023-08-26 20:51:37,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219852535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:37,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:37,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:51:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309542860] [2023-08-26 20:51:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:37,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:51:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:51:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:51:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 210 [2023-08-26 20:51:37,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-26 20:51:37,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:37,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 210 [2023-08-26 20:51:37,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:38,610 INFO L124 PetriNetUnfolderBase]: 14990/25318 cut-off events. [2023-08-26 20:51:38,610 INFO L125 PetriNetUnfolderBase]: For 22813/23641 co-relation queries the response was YES. [2023-08-26 20:51:38,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72839 conditions, 25318 events. 14990/25318 cut-off events. For 22813/23641 co-relation queries the response was YES. Maximal size of possible extension queue 1627. Compared 215025 event pairs, 3366 based on Foata normal form. 1128/24669 useless extension candidates. Maximal degree in co-relation 46499. Up to 15680 conditions per place. [2023-08-26 20:51:38,765 INFO L140 encePairwiseOnDemand]: 195/210 looper letters, 84 selfloop transitions, 17 changer transitions 0/132 dead transitions. [2023-08-26 20:51:38,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 132 transitions, 786 flow [2023-08-26 20:51:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:51:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:51:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-26 20:51:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797619047619048 [2023-08-26 20:51:38,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-26 20:51:38,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-26 20:51:38,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:38,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-26 20:51:38,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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) [2023-08-26 20:51:38,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-26 20:51:38,771 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-26 20:51:38,772 INFO L175 Difference]: Start difference. First operand has 71 places, 84 transitions, 415 flow. Second operand 4 states and 487 transitions. [2023-08-26 20:51:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 132 transitions, 786 flow [2023-08-26 20:51:38,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 777 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:38,876 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 490 flow [2023-08-26 20:51:38,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=490, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2023-08-26 20:51:38,877 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-26 20:51:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 490 flow [2023-08-26 20:51:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-26 20:51:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:38,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:51:38,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:38,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash 235805303, now seen corresponding path program 1 times [2023-08-26 20:51:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:38,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707193249] [2023-08-26 20:51:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707193249] [2023-08-26 20:51:38,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707193249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:38,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:38,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:51:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182955434] [2023-08-26 20:51:38,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:38,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:51:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:51:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:51:38,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-26 20:51:38,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-26 20:51:38,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:38,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-26 20:51:38,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:39,568 INFO L124 PetriNetUnfolderBase]: 3057/5886 cut-off events. [2023-08-26 20:51:39,568 INFO L125 PetriNetUnfolderBase]: For 8182/8492 co-relation queries the response was YES. [2023-08-26 20:51:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18270 conditions, 5886 events. 3057/5886 cut-off events. For 8182/8492 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45835 event pairs, 1565 based on Foata normal form. 442/5955 useless extension candidates. Maximal degree in co-relation 13642. Up to 3721 conditions per place. [2023-08-26 20:51:39,591 INFO L140 encePairwiseOnDemand]: 204/210 looper letters, 56 selfloop transitions, 8 changer transitions 14/110 dead transitions. [2023-08-26 20:51:39,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 731 flow [2023-08-26 20:51:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:51:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:51:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 20:51:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573015873015873 [2023-08-26 20:51:39,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 20:51:39,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 20:51:39,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:39,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 20:51:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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) [2023-08-26 20:51:39,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:39,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:39,601 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 490 flow. Second operand 3 states and 361 transitions. [2023-08-26 20:51:39,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 731 flow [2023-08-26 20:51:39,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 712 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:39,619 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 460 flow [2023-08-26 20:51:39,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2023-08-26 20:51:39,620 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-26 20:51:39,620 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 460 flow [2023-08-26 20:51:39,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-26 20:51:39,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:39,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:51:39,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:39,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash -478535909, now seen corresponding path program 1 times [2023-08-26 20:51:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186964839] [2023-08-26 20:51:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186964839] [2023-08-26 20:51:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186964839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340066802] [2023-08-26 20:51:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:39,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:39,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 210 [2023-08-26 20:51:39,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 460 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 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) [2023-08-26 20:51:39,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:39,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 210 [2023-08-26 20:51:39,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:40,547 INFO L124 PetriNetUnfolderBase]: 4814/8579 cut-off events. [2023-08-26 20:51:40,548 INFO L125 PetriNetUnfolderBase]: For 14026/14042 co-relation queries the response was YES. [2023-08-26 20:51:40,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27400 conditions, 8579 events. 4814/8579 cut-off events. For 14026/14042 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 60546 event pairs, 763 based on Foata normal form. 0/8453 useless extension candidates. Maximal degree in co-relation 23102. Up to 3085 conditions per place. [2023-08-26 20:51:40,595 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 193 selfloop transitions, 43 changer transitions 29/267 dead transitions. [2023-08-26 20:51:40,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 267 transitions, 1982 flow [2023-08-26 20:51:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:51:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:51:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 987 transitions. [2023-08-26 20:51:40,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2023-08-26 20:51:40,599 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 987 transitions. [2023-08-26 20:51:40,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 987 transitions. [2023-08-26 20:51:40,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:40,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 987 transitions. [2023-08-26 20:51:40,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.66666666666667) internal successors, (987), 9 states have internal predecessors, (987), 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) [2023-08-26 20:51:40,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:40,606 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:40,606 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 460 flow. Second operand 9 states and 987 transitions. [2023-08-26 20:51:40,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 267 transitions, 1982 flow [2023-08-26 20:51:40,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 267 transitions, 1882 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:40,663 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 799 flow [2023-08-26 20:51:40,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=799, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2023-08-26 20:51:40,664 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 31 predicate places. [2023-08-26 20:51:40,664 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 799 flow [2023-08-26 20:51:40,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 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) [2023-08-26 20:51:40,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:40,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:51:40,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:40,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1949746498, now seen corresponding path program 1 times [2023-08-26 20:51:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:40,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722142393] [2023-08-26 20:51:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:40,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722142393] [2023-08-26 20:51:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722142393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:40,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:40,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:51:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417280061] [2023-08-26 20:51:40,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:51:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:51:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:51:40,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 210 [2023-08-26 20:51:40,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 799 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 210 [2023-08-26 20:51:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:41,235 INFO L124 PetriNetUnfolderBase]: 2476/5111 cut-off events. [2023-08-26 20:51:41,236 INFO L125 PetriNetUnfolderBase]: For 11894/12112 co-relation queries the response was YES. [2023-08-26 20:51:41,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17781 conditions, 5111 events. 2476/5111 cut-off events. For 11894/12112 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 41207 event pairs, 1281 based on Foata normal form. 406/5369 useless extension candidates. Maximal degree in co-relation 15779. Up to 3380 conditions per place. [2023-08-26 20:51:41,259 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 59 selfloop transitions, 13 changer transitions 4/136 dead transitions. [2023-08-26 20:51:41,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 136 transitions, 1055 flow [2023-08-26 20:51:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:51:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:51:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 20:51:41,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698412698412698 [2023-08-26 20:51:41,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 20:51:41,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 20:51:41,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:41,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 20:51:41,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2023-08-26 20:51:41,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:41,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-26 20:51:41,263 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 799 flow. Second operand 3 states and 359 transitions. [2023-08-26 20:51:41,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 136 transitions, 1055 flow [2023-08-26 20:51:41,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 136 transitions, 1034 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 20:51:41,294 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 860 flow [2023-08-26 20:51:41,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=860, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2023-08-26 20:51:41,295 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 34 predicate places. [2023-08-26 20:51:41,295 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 860 flow [2023-08-26 20:51:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:51:41,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:41,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:41,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:51:41,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:41,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash -768072737, now seen corresponding path program 1 times [2023-08-26 20:51:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:41,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656377517] [2023-08-26 20:51:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:41,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656377517] [2023-08-26 20:51:41,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656377517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:41,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:41,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485495296] [2023-08-26 20:51:41,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:41,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:41,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:41,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:41,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:41,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:41,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:42,051 INFO L124 PetriNetUnfolderBase]: 3184/6659 cut-off events. [2023-08-26 20:51:42,051 INFO L125 PetriNetUnfolderBase]: For 15993/16187 co-relation queries the response was YES. [2023-08-26 20:51:42,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 6659 events. 3184/6659 cut-off events. For 15993/16187 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 55890 event pairs, 991 based on Foata normal form. 195/6733 useless extension candidates. Maximal degree in co-relation 21459. Up to 1963 conditions per place. [2023-08-26 20:51:42,096 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 119 selfloop transitions, 28 changer transitions 26/223 dead transitions. [2023-08-26 20:51:42,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 223 transitions, 1691 flow [2023-08-26 20:51:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:51:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:51:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1015 transitions. [2023-08-26 20:51:42,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2023-08-26 20:51:42,099 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1015 transitions. [2023-08-26 20:51:42,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1015 transitions. [2023-08-26 20:51:42,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:42,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1015 transitions. [2023-08-26 20:51:42,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.77777777777777) internal successors, (1015), 9 states have internal predecessors, (1015), 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) [2023-08-26 20:51:42,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:42,106 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:42,106 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 860 flow. Second operand 9 states and 1015 transitions. [2023-08-26 20:51:42,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 223 transitions, 1691 flow [2023-08-26 20:51:42,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 223 transitions, 1645 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:42,172 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1010 flow [2023-08-26 20:51:42,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1010, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2023-08-26 20:51:42,173 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 44 predicate places. [2023-08-26 20:51:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1010 flow [2023-08-26 20:51:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:42,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:42,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:51:42,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:42,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -968909794, now seen corresponding path program 1 times [2023-08-26 20:51:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258757765] [2023-08-26 20:51:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258757765] [2023-08-26 20:51:42,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258757765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:42,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:42,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:42,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582424569] [2023-08-26 20:51:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:42,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:42,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 1010 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:42,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:42,872 INFO L124 PetriNetUnfolderBase]: 2916/6093 cut-off events. [2023-08-26 20:51:42,872 INFO L125 PetriNetUnfolderBase]: For 19393/19597 co-relation queries the response was YES. [2023-08-26 20:51:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22680 conditions, 6093 events. 2916/6093 cut-off events. For 19393/19597 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50661 event pairs, 674 based on Foata normal form. 274/6271 useless extension candidates. Maximal degree in co-relation 20088. Up to 1416 conditions per place. [2023-08-26 20:51:42,905 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 94 selfloop transitions, 23 changer transitions 28/195 dead transitions. [2023-08-26 20:51:42,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 195 transitions, 1569 flow [2023-08-26 20:51:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 885 transitions. [2023-08-26 20:51:42,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-08-26 20:51:42,908 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 885 transitions. [2023-08-26 20:51:42,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 885 transitions. [2023-08-26 20:51:42,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:42,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 885 transitions. [2023-08-26 20:51:42,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.625) internal successors, (885), 8 states have internal predecessors, (885), 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) [2023-08-26 20:51:42,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:42,913 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:42,913 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1010 flow. Second operand 8 states and 885 transitions. [2023-08-26 20:51:42,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 195 transitions, 1569 flow [2023-08-26 20:51:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 195 transitions, 1533 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:42,973 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 935 flow [2023-08-26 20:51:42,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2023-08-26 20:51:42,974 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-26 20:51:42,974 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 935 flow [2023-08-26 20:51:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:42,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:42,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:51:42,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:42,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -896521577, now seen corresponding path program 1 times [2023-08-26 20:51:42,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688959725] [2023-08-26 20:51:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688959725] [2023-08-26 20:51:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688959725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655881932] [2023-08-26 20:51:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:43,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 210 [2023-08-26 20:51:43,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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) [2023-08-26 20:51:43,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:43,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 210 [2023-08-26 20:51:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:43,753 INFO L124 PetriNetUnfolderBase]: 4326/7635 cut-off events. [2023-08-26 20:51:43,754 INFO L125 PetriNetUnfolderBase]: For 23174/23174 co-relation queries the response was YES. [2023-08-26 20:51:43,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29329 conditions, 7635 events. 4326/7635 cut-off events. For 23174/23174 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 52684 event pairs, 579 based on Foata normal form. 70/7705 useless extension candidates. Maximal degree in co-relation 26611. Up to 2633 conditions per place. [2023-08-26 20:51:43,800 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 181 selfloop transitions, 55 changer transitions 31/269 dead transitions. [2023-08-26 20:51:43,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 269 transitions, 2460 flow [2023-08-26 20:51:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:51:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:51:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 977 transitions. [2023-08-26 20:51:43,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169312169312169 [2023-08-26 20:51:43,803 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 977 transitions. [2023-08-26 20:51:43,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 977 transitions. [2023-08-26 20:51:43,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:43,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 977 transitions. [2023-08-26 20:51:43,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.55555555555556) internal successors, (977), 9 states have internal predecessors, (977), 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) [2023-08-26 20:51:43,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:43,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:43,809 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 935 flow. Second operand 9 states and 977 transitions. [2023-08-26 20:51:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 269 transitions, 2460 flow [2023-08-26 20:51:43,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 269 transitions, 2256 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-26 20:51:43,892 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1120 flow [2023-08-26 20:51:43,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1120, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2023-08-26 20:51:43,893 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 51 predicate places. [2023-08-26 20:51:43,893 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1120 flow [2023-08-26 20:51:43,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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) [2023-08-26 20:51:43,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:43,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:43,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:51:43,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:43,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash 288653522, now seen corresponding path program 1 times [2023-08-26 20:51:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:43,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006674818] [2023-08-26 20:51:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:43,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:43,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006674818] [2023-08-26 20:51:43,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006674818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:43,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:43,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643038120] [2023-08-26 20:51:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:43,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:51:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:51:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:51:43,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 210 [2023-08-26 20:51:43,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1120 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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) [2023-08-26 20:51:43,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:43,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 210 [2023-08-26 20:51:43,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:44,792 INFO L124 PetriNetUnfolderBase]: 4194/7425 cut-off events. [2023-08-26 20:51:44,792 INFO L125 PetriNetUnfolderBase]: For 21526/21526 co-relation queries the response was YES. [2023-08-26 20:51:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 7425 events. 4194/7425 cut-off events. For 21526/21526 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 51176 event pairs, 710 based on Foata normal form. 78/7503 useless extension candidates. Maximal degree in co-relation 26365. Up to 2989 conditions per place. [2023-08-26 20:51:44,859 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 184 selfloop transitions, 59 changer transitions 17/262 dead transitions. [2023-08-26 20:51:44,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 262 transitions, 2438 flow [2023-08-26 20:51:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:51:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:51:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 960 transitions. [2023-08-26 20:51:44,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-26 20:51:44,863 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 960 transitions. [2023-08-26 20:51:44,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 960 transitions. [2023-08-26 20:51:44,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:44,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 960 transitions. [2023-08-26 20:51:44,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.66666666666667) internal successors, (960), 9 states have internal predecessors, (960), 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) [2023-08-26 20:51:44,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:44,868 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 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) [2023-08-26 20:51:44,868 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1120 flow. Second operand 9 states and 960 transitions. [2023-08-26 20:51:44,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 262 transitions, 2438 flow [2023-08-26 20:51:44,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 262 transitions, 2438 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:51:45,002 INFO L231 Difference]: Finished difference. Result has 120 places, 142 transitions, 1353 flow [2023-08-26 20:51:45,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1353, PETRI_PLACES=120, PETRI_TRANSITIONS=142} [2023-08-26 20:51:45,003 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2023-08-26 20:51:45,003 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 142 transitions, 1353 flow [2023-08-26 20:51:45,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 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) [2023-08-26 20:51:45,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:45,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:45,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:51:45,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:45,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1066423451, now seen corresponding path program 1 times [2023-08-26 20:51:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:45,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861940098] [2023-08-26 20:51:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:45,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861940098] [2023-08-26 20:51:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861940098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:45,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:45,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722521973] [2023-08-26 20:51:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:45,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:45,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 142 transitions, 1353 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:45,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:45,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:45,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:45,752 INFO L124 PetriNetUnfolderBase]: 2646/5385 cut-off events. [2023-08-26 20:51:45,753 INFO L125 PetriNetUnfolderBase]: For 22284/22505 co-relation queries the response was YES. [2023-08-26 20:51:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22104 conditions, 5385 events. 2646/5385 cut-off events. For 22284/22505 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 42317 event pairs, 725 based on Foata normal form. 250/5544 useless extension candidates. Maximal degree in co-relation 20338. Up to 1794 conditions per place. [2023-08-26 20:51:45,788 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 96 selfloop transitions, 20 changer transitions 35/211 dead transitions. [2023-08-26 20:51:45,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 211 transitions, 2013 flow [2023-08-26 20:51:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 871 transitions. [2023-08-26 20:51:45,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518452380952381 [2023-08-26 20:51:45,791 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 871 transitions. [2023-08-26 20:51:45,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 871 transitions. [2023-08-26 20:51:45,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:45,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 871 transitions. [2023-08-26 20:51:45,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.875) internal successors, (871), 8 states have internal predecessors, (871), 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) [2023-08-26 20:51:45,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:45,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:45,796 INFO L175 Difference]: Start difference. First operand has 120 places, 142 transitions, 1353 flow. Second operand 8 states and 871 transitions. [2023-08-26 20:51:45,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 211 transitions, 2013 flow [2023-08-26 20:51:45,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 211 transitions, 1958 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 20:51:45,911 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 1213 flow [2023-08-26 20:51:45,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1213, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2023-08-26 20:51:45,912 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 63 predicate places. [2023-08-26 20:51:45,912 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 1213 flow [2023-08-26 20:51:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:45,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:45,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:45,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:51:45,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:45,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1066423450, now seen corresponding path program 1 times [2023-08-26 20:51:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:45,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217989104] [2023-08-26 20:51:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217989104] [2023-08-26 20:51:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217989104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454547843] [2023-08-26 20:51:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:45,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 1213 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:45,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:46,695 INFO L124 PetriNetUnfolderBase]: 2546/5177 cut-off events. [2023-08-26 20:51:46,695 INFO L125 PetriNetUnfolderBase]: For 21775/21995 co-relation queries the response was YES. [2023-08-26 20:51:46,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21306 conditions, 5177 events. 2546/5177 cut-off events. For 21775/21995 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40888 event pairs, 882 based on Foata normal form. 212/5262 useless extension candidates. Maximal degree in co-relation 19576. Up to 1883 conditions per place. [2023-08-26 20:51:46,729 INFO L140 encePairwiseOnDemand]: 201/210 looper letters, 97 selfloop transitions, 17 changer transitions 11/185 dead transitions. [2023-08-26 20:51:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 1768 flow [2023-08-26 20:51:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-08-26 20:51:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101190476190476 [2023-08-26 20:51:46,731 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-08-26 20:51:46,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-08-26 20:51:46,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:46,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-08-26 20:51:46,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 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) [2023-08-26 20:51:46,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:46,736 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:46,736 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 1213 flow. Second operand 8 states and 857 transitions. [2023-08-26 20:51:46,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 1768 flow [2023-08-26 20:51:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 1699 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-26 20:51:46,831 INFO L231 Difference]: Finished difference. Result has 123 places, 133 transitions, 1228 flow [2023-08-26 20:51:46,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1228, PETRI_PLACES=123, PETRI_TRANSITIONS=133} [2023-08-26 20:51:46,831 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2023-08-26 20:51:46,832 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 133 transitions, 1228 flow [2023-08-26 20:51:46,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 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) [2023-08-26 20:51:46,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:46,832 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] [2023-08-26 20:51:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 20:51:46,832 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:46,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -480856643, now seen corresponding path program 1 times [2023-08-26 20:51:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94459818] [2023-08-26 20:51:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:46,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94459818] [2023-08-26 20:51:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94459818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:46,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:46,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:46,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145950244] [2023-08-26 20:51:46,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:46,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:46,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 133 transitions, 1228 flow. Second operand has 6 states, 6 states have (on average 98.83333333333333) internal successors, (593), 6 states have internal predecessors, (593), 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) [2023-08-26 20:51:46,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:46,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:46,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:47,427 INFO L124 PetriNetUnfolderBase]: 2359/4839 cut-off events. [2023-08-26 20:51:47,427 INFO L125 PetriNetUnfolderBase]: For 20662/20937 co-relation queries the response was YES. [2023-08-26 20:51:47,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 4839 events. 2359/4839 cut-off events. For 20662/20937 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 38388 event pairs, 582 based on Foata normal form. 239/4999 useless extension candidates. Maximal degree in co-relation 18238. Up to 1126 conditions per place. [2023-08-26 20:51:47,454 INFO L140 encePairwiseOnDemand]: 201/210 looper letters, 94 selfloop transitions, 23 changer transitions 17/194 dead transitions. [2023-08-26 20:51:47,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 194 transitions, 1822 flow [2023-08-26 20:51:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 858 transitions. [2023-08-26 20:51:47,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2023-08-26 20:51:47,457 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 858 transitions. [2023-08-26 20:51:47,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 858 transitions. [2023-08-26 20:51:47,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:47,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 858 transitions. [2023-08-26 20:51:47,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 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) [2023-08-26 20:51:47,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:47,461 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:47,462 INFO L175 Difference]: Start difference. First operand has 123 places, 133 transitions, 1228 flow. Second operand 8 states and 858 transitions. [2023-08-26 20:51:47,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 194 transitions, 1822 flow [2023-08-26 20:51:47,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 194 transitions, 1808 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 20:51:47,530 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 1236 flow [2023-08-26 20:51:47,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1236, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2023-08-26 20:51:47,531 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2023-08-26 20:51:47,531 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 1236 flow [2023-08-26 20:51:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.83333333333333) internal successors, (593), 6 states have internal predecessors, (593), 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) [2023-08-26 20:51:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:47,532 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] [2023-08-26 20:51:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 20:51:47,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:47,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1503575356, now seen corresponding path program 1 times [2023-08-26 20:51:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086862553] [2023-08-26 20:51:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086862553] [2023-08-26 20:51:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086862553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:51:47,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635829920] [2023-08-26 20:51:47,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:47,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:51:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:51:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:51:47,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 210 [2023-08-26 20:51:47,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 1236 flow. Second operand has 6 states, 6 states have (on average 98.83333333333333) internal successors, (593), 6 states have internal predecessors, (593), 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) [2023-08-26 20:51:47,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:47,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 210 [2023-08-26 20:51:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:48,074 INFO L124 PetriNetUnfolderBase]: 2450/4991 cut-off events. [2023-08-26 20:51:48,074 INFO L125 PetriNetUnfolderBase]: For 21556/21796 co-relation queries the response was YES. [2023-08-26 20:51:48,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20853 conditions, 4991 events. 2450/4991 cut-off events. For 21556/21796 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39353 event pairs, 629 based on Foata normal form. 230/5129 useless extension candidates. Maximal degree in co-relation 19277. Up to 1490 conditions per place. [2023-08-26 20:51:48,102 INFO L140 encePairwiseOnDemand]: 201/210 looper letters, 84 selfloop transitions, 23 changer transitions 17/184 dead transitions. [2023-08-26 20:51:48,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 1774 flow [2023-08-26 20:51:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 853 transitions. [2023-08-26 20:51:48,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077380952380952 [2023-08-26 20:51:48,105 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 853 transitions. [2023-08-26 20:51:48,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 853 transitions. [2023-08-26 20:51:48,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:48,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 853 transitions. [2023-08-26 20:51:48,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.625) internal successors, (853), 8 states have internal predecessors, (853), 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) [2023-08-26 20:51:48,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:48,109 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:48,109 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 1236 flow. Second operand 8 states and 853 transitions. [2023-08-26 20:51:48,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 1774 flow [2023-08-26 20:51:48,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 1709 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-26 20:51:48,187 INFO L231 Difference]: Finished difference. Result has 124 places, 127 transitions, 1195 flow [2023-08-26 20:51:48,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1195, PETRI_PLACES=124, PETRI_TRANSITIONS=127} [2023-08-26 20:51:48,187 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 66 predicate places. [2023-08-26 20:51:48,188 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 127 transitions, 1195 flow [2023-08-26 20:51:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.83333333333333) internal successors, (593), 6 states have internal predecessors, (593), 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) [2023-08-26 20:51:48,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:48,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:48,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 20:51:48,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:48,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 242535275, now seen corresponding path program 1 times [2023-08-26 20:51:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206908212] [2023-08-26 20:51:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:51:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:51:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:51:48,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206908212] [2023-08-26 20:51:48,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206908212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:51:48,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:51:48,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:51:48,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409606737] [2023-08-26 20:51:48,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:51:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:51:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:51:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:51:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:51:48,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 210 [2023-08-26 20:51:48,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 127 transitions, 1195 flow. Second operand has 7 states, 7 states have (on average 95.57142857142857) internal successors, (669), 7 states have internal predecessors, (669), 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) [2023-08-26 20:51:48,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:51:48,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 210 [2023-08-26 20:51:48,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:51:48,884 INFO L124 PetriNetUnfolderBase]: 1976/4129 cut-off events. [2023-08-26 20:51:48,885 INFO L125 PetriNetUnfolderBase]: For 17961/18176 co-relation queries the response was YES. [2023-08-26 20:51:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17216 conditions, 4129 events. 1976/4129 cut-off events. For 17961/18176 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32030 event pairs, 207 based on Foata normal form. 235/4345 useless extension candidates. Maximal degree in co-relation 16293. Up to 853 conditions per place. [2023-08-26 20:51:48,905 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 80 selfloop transitions, 20 changer transitions 35/189 dead transitions. [2023-08-26 20:51:48,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 189 transitions, 1741 flow [2023-08-26 20:51:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:51:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:51:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 843 transitions. [2023-08-26 20:51:48,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2023-08-26 20:51:48,907 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 843 transitions. [2023-08-26 20:51:48,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 843 transitions. [2023-08-26 20:51:48,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:51:48,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 843 transitions. [2023-08-26 20:51:48,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 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) [2023-08-26 20:51:48,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:48,911 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 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) [2023-08-26 20:51:48,911 INFO L175 Difference]: Start difference. First operand has 124 places, 127 transitions, 1195 flow. Second operand 8 states and 843 transitions. [2023-08-26 20:51:48,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 189 transitions, 1741 flow [2023-08-26 20:51:48,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 189 transitions, 1681 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-26 20:51:48,955 INFO L231 Difference]: Finished difference. Result has 122 places, 112 transitions, 1023 flow [2023-08-26 20:51:48,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1023, PETRI_PLACES=122, PETRI_TRANSITIONS=112} [2023-08-26 20:51:48,956 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 64 predicate places. [2023-08-26 20:51:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 112 transitions, 1023 flow [2023-08-26 20:51:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.57142857142857) internal successors, (669), 7 states have internal predecessors, (669), 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) [2023-08-26 20:51:48,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:51:48,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:48,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 20:51:48,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting readerErr2ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-08-26 20:51:48,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:51:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 84330791, now seen corresponding path program 1 times [2023-08-26 20:51:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:51:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327195362] [2023-08-26 20:51:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:51:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:51:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:48,975 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:51:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:51:49,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:51:49,006 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:51:49,007 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr2ASSERT_VIOLATIONASSERT (18 of 19 remaining) [2023-08-26 20:51:49,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 19 remaining) [2023-08-26 20:51:49,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 19 remaining) [2023-08-26 20:51:49,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 19 remaining) [2023-08-26 20:51:49,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 19 remaining) [2023-08-26 20:51:49,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr2ASSERT_VIOLATIONASSERT (13 of 19 remaining) [2023-08-26 20:51:49,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 19 remaining) [2023-08-26 20:51:49,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 19 remaining) [2023-08-26 20:51:49,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 19 remaining) [2023-08-26 20:51:49,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 19 remaining) [2023-08-26 20:51:49,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 19 remaining) [2023-08-26 20:51:49,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 19 remaining) [2023-08-26 20:51:49,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 19 remaining) [2023-08-26 20:51:49,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr2ASSERT_VIOLATIONASSERT (0 of 19 remaining) [2023-08-26 20:51:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 20:51:49,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:51:49,019 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:51:49,019 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:51:49,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:51:49 BasicIcfg [2023-08-26 20:51:49,055 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:51:49,056 INFO L158 Benchmark]: Toolchain (without parser) took 27399.96ms. Allocated memory was 356.5MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 313.5MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-26 20:51:49,056 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 333.4MB in the beginning and 333.3MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:51:49,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.30ms. Allocated memory is still 356.5MB. Free memory was 313.3MB in the beginning and 330.7MB in the end (delta: -17.4MB). Peak memory consumption was 24.8MB. Max. memory is 16.0GB. [2023-08-26 20:51:49,056 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.85ms. Allocated memory is still 356.5MB. Free memory was 330.7MB in the beginning and 328.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:51:49,057 INFO L158 Benchmark]: Boogie Preprocessor took 48.09ms. Allocated memory is still 356.5MB. Free memory was 328.6MB in the beginning and 327.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:51:49,057 INFO L158 Benchmark]: RCFGBuilder took 514.73ms. Allocated memory is still 356.5MB. Free memory was 327.0MB in the beginning and 308.7MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 20:51:49,057 INFO L158 Benchmark]: TraceAbstraction took 26282.35ms. Allocated memory was 356.5MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 308.1MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-26 20:51:49,058 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 333.4MB in the beginning and 333.3MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 488.30ms. Allocated memory is still 356.5MB. Free memory was 313.3MB in the beginning and 330.7MB in the end (delta: -17.4MB). Peak memory consumption was 24.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.85ms. Allocated memory is still 356.5MB. Free memory was 330.7MB in the beginning and 328.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.09ms. Allocated memory is still 356.5MB. Free memory was 328.6MB in the beginning and 327.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 514.73ms. Allocated memory is still 356.5MB. Free memory was 327.0MB in the beginning and 308.7MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 26282.35ms. Allocated memory was 356.5MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 308.1MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.6GB. 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: 2.9s, 120 PlacesBefore, 58 PlacesAfterwards, 111 TransitionsBefore, 46 TransitionsAfterwards, 4248 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 82 TotalNumberOfCompositions, 11243 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5811, independent: 5584, independent conditional: 0, independent unconditional: 5584, dependent: 227, dependent conditional: 0, dependent unconditional: 227, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2218, independent: 2175, independent conditional: 0, independent unconditional: 2175, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5811, independent: 3409, independent conditional: 0, independent unconditional: 3409, dependent: 184, dependent conditional: 0, dependent unconditional: 184, unknown: 2218, unknown conditional: 0, unknown unconditional: 2218] , Statistics on independence cache: Total cache size (in pairs): 372, Positive cache size: 348, Positive conditional cache size: 0, Positive unconditional cache size: 348, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 16]: assertion can be violated assertion can be violated We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-2, r=0, t1={7:0}, t2={8:0}, t3={6:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-1, r=0, t1={7:0}, t2={8:0}, t3={6:0}, t4={5:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=0, r=0, t1={7:0}, t2={8:0}, t3={6:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=1, r=0, t1={7:0}, t2={8:0}, t3={6:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] EXPR 2 r+1 [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] EXPR 2 r-1 [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] EXPR 4 r+1 [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] CALL 4 reach_error() [L16] COND FALSE 4 !(0) [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={50:49}, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 711]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 711]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 159 locations, 19 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: 26.1s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 21.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1316 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1316 mSDsluCounter, 172 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 80 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3125 IncrementalHoareTripleChecker+Invalid, 3268 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 92 mSDtfsCounter, 3125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1353occurred in iteration=11, InterpolantAutomatonStates: 110, 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, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 218 ConstructedInterpolants, 0 QuantifiedInterpolants, 550 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-26 20:51:49,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...