/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 15:40:50,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 15:40:50,353 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 [2023-08-27 15:40:50,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 15:40:50,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 15:40:50,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 15:40:50,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 15:40:50,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 15:40:50,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 15:40:50,379 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 15:40:50,379 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 15:40:50,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 15:40:50,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 15:40:50,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 15:40:50,382 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 15:40:50,382 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 15:40:50,382 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 15:40:50,383 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 15:40:50,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 15:40:50,383 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 15:40:50,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 15:40:50,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:40:50,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 15:40:50,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 15:40:50,384 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 15:40:50,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 15:40:50,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 15:40:50,385 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 15:40:50,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 15:40:50,385 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 15:40:50,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 15:40:50,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 15:40:50,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 15:40:50,642 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 15:40:50,644 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 15:40:50,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-27 15:40:51,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 15:40:51,849 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 15:40:51,849 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-27 15:40:51,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ece69bcf/d712b650cc724105bd828a7a7fe44ee4/FLAG9745ae8ce [2023-08-27 15:40:51,872 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ece69bcf/d712b650cc724105bd828a7a7fe44ee4 [2023-08-27 15:40:51,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 15:40:51,876 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 15:40:51,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 15:40:51,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 15:40:51,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 15:40:51,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:40:51" (1/1) ... [2023-08-27 15:40:51,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dae614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:51, skipping insertion in model container [2023-08-27 15:40:51,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:40:51" (1/1) ... [2023-08-27 15:40:51,923 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 15:40:52,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:40:52,181 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 15:40:52,203 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [208] [2023-08-27 15:40:52,204 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [209] [2023-08-27 15:40:52,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:40:52,254 INFO L206 MainTranslator]: Completed translation [2023-08-27 15:40:52,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52 WrapperNode [2023-08-27 15:40:52,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 15:40:52,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 15:40:52,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 15:40:52,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 15:40:52,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,285 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 145 [2023-08-27 15:40:52,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 15:40:52,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 15:40:52,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 15:40:52,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 15:40:52,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,301 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 15:40:52,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 15:40:52,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 15:40:52,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 15:40:52,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (1/1) ... [2023-08-27 15:40:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:40:52,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:40:52,346 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) [2023-08-27 15:40:52,358 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 [2023-08-27 15:40:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 15:40:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-27 15:40:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-27 15:40:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 15:40:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 15:40:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-27 15:40:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 15:40:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 15:40:52,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 15:40:52,381 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 15:40:52,486 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 15:40:52,487 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 15:40:52,727 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 15:40:52,737 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 15:40:52,737 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 15:40:52,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:40:52 BoogieIcfgContainer [2023-08-27 15:40:52,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 15:40:52,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 15:40:52,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 15:40:52,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 15:40:52,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 03:40:51" (1/3) ... [2023-08-27 15:40:52,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de0015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:40:52, skipping insertion in model container [2023-08-27 15:40:52,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:40:52" (2/3) ... [2023-08-27 15:40:52,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de0015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:40:52, skipping insertion in model container [2023-08-27 15:40:52,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:40:52" (3/3) ... [2023-08-27 15:40:52,744 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-08-27 15:40:52,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 15:40:52,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-27 15:40:52,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 15:40:52,844 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 15:40:52,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 156 transitions, 328 flow [2023-08-27 15:40:52,940 INFO L124 PetriNetUnfolderBase]: 12/154 cut-off events. [2023-08-27 15:40:52,940 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:40:52,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 12/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 315 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-27 15:40:52,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 156 transitions, 328 flow [2023-08-27 15:40:52,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 145 transitions, 299 flow [2023-08-27 15:40:52,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 15:40:52,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 145 transitions, 299 flow [2023-08-27 15:40:52,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 145 transitions, 299 flow [2023-08-27 15:40:52,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 145 transitions, 299 flow [2023-08-27 15:40:52,978 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-08-27 15:40:52,978 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:40:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 145 events. 12/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-27 15:40:52,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 5392 [2023-08-27 15:40:57,033 INFO L134 LiptonReduction]: Checked pairs total: 11407 [2023-08-27 15:40:57,034 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-27 15:40:57,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 15:40:57,046 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;@3e024d88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 15:40:57,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-27 15:40:57,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 15:40:57,050 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-08-27 15:40:57,050 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:40:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:57,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:57,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:57,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 475493111, now seen corresponding path program 1 times [2023-08-27 15:40:57,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:57,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524998952] [2023-08-27 15:40:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:57,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524998952] [2023-08-27 15:40:57,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524998952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:57,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:57,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893315015] [2023-08-27 15:40:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:57,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 15:40:57,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:57,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 15:40:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:57,492 INFO L124 PetriNetUnfolderBase]: 1019/1672 cut-off events. [2023-08-27 15:40:57,493 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-27 15:40:57,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 1672 events. 1019/1672 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8531 event pairs, 465 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 3168. Up to 937 conditions per place. [2023-08-27 15:40:57,505 INFO L140 encePairwiseOnDemand]: 284/290 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-27 15:40:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 260 flow [2023-08-27 15:40:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-27 15:40:57,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471264367816092 [2023-08-27 15:40:57,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-27 15:40:57,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-27 15:40:57,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:57,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-27 15:40:57,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,532 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 89 flow. Second operand 3 states and 476 transitions. [2023-08-27 15:40:57,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 260 flow [2023-08-27 15:40:57,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 15:40:57,536 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 96 flow [2023-08-27 15:40:57,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-27 15:40:57,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-27 15:40:57,540 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 96 flow [2023-08-27 15:40:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:57,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 15:40:57,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:57,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash 475578292, now seen corresponding path program 1 times [2023-08-27 15:40:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476172945] [2023-08-27 15:40:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:57,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:40:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184523369] [2023-08-27 15:40:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:57,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:40:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:40:57,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:40:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 15:40:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:57,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:40:57,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:40:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:57,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:40:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476172945] [2023-08-27 15:40:57,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 15:40:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184523369] [2023-08-27 15:40:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184523369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:57,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508134890] [2023-08-27 15:40:57,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-27 15:40:57,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:57,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-27 15:40:57,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:57,872 INFO L124 PetriNetUnfolderBase]: 939/1530 cut-off events. [2023-08-27 15:40:57,873 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-08-27 15:40:57,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3181 conditions, 1530 events. 939/1530 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7321 event pairs, 717 based on Foata normal form. 0/1110 useless extension candidates. Maximal degree in co-relation 2790. Up to 1424 conditions per place. [2023-08-27 15:40:57,879 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 33 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-27 15:40:57,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 162 flow [2023-08-27 15:40:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-27 15:40:57,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908045977011494 [2023-08-27 15:40:57,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-27 15:40:57,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-27 15:40:57,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:57,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-27 15:40:57,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,889 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 96 flow. Second operand 3 states and 427 transitions. [2023-08-27 15:40:57,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 162 flow [2023-08-27 15:40:57,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:57,893 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 94 flow [2023-08-27 15:40:57,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-27 15:40:57,894 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-27 15:40:57,894 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 94 flow [2023-08-27 15:40:57,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:57,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:57,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:57,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 15:40:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:40:58,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:58,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -646915373, now seen corresponding path program 1 times [2023-08-27 15:40:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75898604] [2023-08-27 15:40:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75898604] [2023-08-27 15:40:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75898604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:58,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:58,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:58,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963792589] [2023-08-27 15:40:58,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:58,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:58,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-27 15:40:58,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-27 15:40:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:58,306 INFO L124 PetriNetUnfolderBase]: 1116/1891 cut-off events. [2023-08-27 15:40:58,306 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-08-27 15:40:58,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1891 events. 1116/1891 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9675 event pairs, 519 based on Foata normal form. 0/1389 useless extension candidates. Maximal degree in co-relation 3995. Up to 908 conditions per place. [2023-08-27 15:40:58,313 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 58 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-27 15:40:58,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 281 flow [2023-08-27 15:40:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-27 15:40:58,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2023-08-27 15:40:58,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-27 15:40:58,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-27 15:40:58,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:58,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-27 15:40:58,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,318 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 3 states and 474 transitions. [2023-08-27 15:40:58,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 281 flow [2023-08-27 15:40:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:58,319 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 108 flow [2023-08-27 15:40:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-27 15:40:58,320 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-27 15:40:58,320 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 108 flow [2023-08-27 15:40:58,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:58,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:58,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 15:40:58,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:58,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash -646952037, now seen corresponding path program 1 times [2023-08-27 15:40:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367694697] [2023-08-27 15:40:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:58,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367694697] [2023-08-27 15:40:58,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367694697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:58,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:58,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:58,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74130715] [2023-08-27 15:40:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:58,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:58,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 15:40:58,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:58,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 15:40:58,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:58,562 INFO L124 PetriNetUnfolderBase]: 1715/2916 cut-off events. [2023-08-27 15:40:58,562 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-27 15:40:58,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6214 conditions, 2916 events. 1715/2916 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16204 event pairs, 872 based on Foata normal form. 0/2306 useless extension candidates. Maximal degree in co-relation 6205. Up to 1748 conditions per place. [2023-08-27 15:40:58,574 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 58 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-27 15:40:58,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 298 flow [2023-08-27 15:40:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-27 15:40:58,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539080459770115 [2023-08-27 15:40:58,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-27 15:40:58,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-27 15:40:58,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:58,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-27 15:40:58,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,579 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 108 flow. Second operand 3 states and 469 transitions. [2023-08-27 15:40:58,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 298 flow [2023-08-27 15:40:58,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:58,581 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 121 flow [2023-08-27 15:40:58,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-27 15:40:58,582 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-27 15:40:58,582 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 121 flow [2023-08-27 15:40:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:58,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 15:40:58,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 15:40:58,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:58,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1925776729, now seen corresponding path program 1 times [2023-08-27 15:40:58,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:58,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622799128] [2023-08-27 15:40:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:58,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622799128] [2023-08-27 15:40:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622799128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:58,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:58,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:58,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314801752] [2023-08-27 15:40:58,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:58,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:58,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:58,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 15:40:58,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:58,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 15:40:58,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:58,787 INFO L124 PetriNetUnfolderBase]: 1577/2624 cut-off events. [2023-08-27 15:40:58,788 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2023-08-27 15:40:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6019 conditions, 2624 events. 1577/2624 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13766 event pairs, 477 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 6009. Up to 2418 conditions per place. [2023-08-27 15:40:58,797 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 44 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-27 15:40:58,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 245 flow [2023-08-27 15:40:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-27 15:40:58,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2023-08-27 15:40:58,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-27 15:40:58,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-27 15:40:58,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:58,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-27 15:40:58,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,801 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 121 flow. Second operand 3 states and 454 transitions. [2023-08-27 15:40:58,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 245 flow [2023-08-27 15:40:58,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:58,803 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 117 flow [2023-08-27 15:40:58,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-27 15:40:58,805 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-27 15:40:58,806 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 117 flow [2023-08-27 15:40:58,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:58,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 15:40:58,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 15:40:58,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:58,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1925776805, now seen corresponding path program 1 times [2023-08-27 15:40:58,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329266330] [2023-08-27 15:40:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:40:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329266330] [2023-08-27 15:40:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329266330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:58,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277081411] [2023-08-27 15:40:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:58,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 15:40:58,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:58,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:58,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 15:40:58,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:59,025 INFO L124 PetriNetUnfolderBase]: 1453/2474 cut-off events. [2023-08-27 15:40:59,025 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2023-08-27 15:40:59,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5541 conditions, 2474 events. 1453/2474 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13529 event pairs, 351 based on Foata normal form. 0/2138 useless extension candidates. Maximal degree in co-relation 5531. Up to 1698 conditions per place. [2023-08-27 15:40:59,034 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 46 selfloop transitions, 4 changer transitions 1/56 dead transitions. [2023-08-27 15:40:59,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 269 flow [2023-08-27 15:40:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-27 15:40:59,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-27 15:40:59,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-27 15:40:59,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-27 15:40:59,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:59,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-27 15:40:59,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,039 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 117 flow. Second operand 3 states and 460 transitions. [2023-08-27 15:40:59,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 269 flow [2023-08-27 15:40:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:59,041 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 128 flow [2023-08-27 15:40:59,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-27 15:40:59,043 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-27 15:40:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 128 flow [2023-08-27 15:40:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:59,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 15:40:59,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:59,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash -783258015, now seen corresponding path program 1 times [2023-08-27 15:40:59,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:59,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990160232] [2023-08-27 15:40:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:40:59,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:59,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990160232] [2023-08-27 15:40:59,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990160232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:59,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:59,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:40:59,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083757513] [2023-08-27 15:40:59,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:59,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:59,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 15:40:59,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:59,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 15:40:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:59,264 INFO L124 PetriNetUnfolderBase]: 1380/2377 cut-off events. [2023-08-27 15:40:59,264 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2023-08-27 15:40:59,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2377 events. 1380/2377 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12485 event pairs, 250 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 5553. Up to 1582 conditions per place. [2023-08-27 15:40:59,275 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 46 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-27 15:40:59,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 282 flow [2023-08-27 15:40:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:40:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:40:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-27 15:40:59,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2023-08-27 15:40:59,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-27 15:40:59,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-27 15:40:59,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:59,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-27 15:40:59,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,283 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 128 flow. Second operand 3 states and 454 transitions. [2023-08-27 15:40:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 282 flow [2023-08-27 15:40:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:59,287 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 136 flow [2023-08-27 15:40:59,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-27 15:40:59,288 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-27 15:40:59,289 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 136 flow [2023-08-27 15:40:59,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:59,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:59,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 15:40:59,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:59,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -783258103, now seen corresponding path program 1 times [2023-08-27 15:40:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917516125] [2023-08-27 15:40:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917516125] [2023-08-27 15:40:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917516125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:40:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115249401] [2023-08-27 15:40:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:59,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:40:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:40:59,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:40:59,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 15:40:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:59,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:40:59,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:40:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:59,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:40:59,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115249401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:59,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:40:59,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 15:40:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17081853] [2023-08-27 15:40:59,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:59,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:40:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:40:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 15:40:59,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 15:40:59,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:59,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 15:40:59,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:40:59,679 INFO L124 PetriNetUnfolderBase]: 1288/2211 cut-off events. [2023-08-27 15:40:59,679 INFO L125 PetriNetUnfolderBase]: For 1500/1500 co-relation queries the response was YES. [2023-08-27 15:40:59,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5476 conditions, 2211 events. 1288/2211 cut-off events. For 1500/1500 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11291 event pairs, 83 based on Foata normal form. 58/2063 useless extension candidates. Maximal degree in co-relation 5465. Up to 1004 conditions per place. [2023-08-27 15:40:59,688 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 70 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-27 15:40:59,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 398 flow [2023-08-27 15:40:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:40:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:40:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-27 15:40:59,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267241379310345 [2023-08-27 15:40:59,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-27 15:40:59,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-27 15:40:59,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:40:59,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-27 15:40:59,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,693 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 136 flow. Second operand 4 states and 611 transitions. [2023-08-27 15:40:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 398 flow [2023-08-27 15:40:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:40:59,695 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 132 flow [2023-08-27 15:40:59,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-27 15:40:59,695 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-27 15:40:59,696 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 132 flow [2023-08-27 15:40:59,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:40:59,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:40:59,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 15:40:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-27 15:40:59,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:40:59,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:40:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash -967571044, now seen corresponding path program 1 times [2023-08-27 15:40:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:40:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883634426] [2023-08-27 15:40:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:40:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:40:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:40:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:40:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:40:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883634426] [2023-08-27 15:40:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883634426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:40:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:40:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 15:40:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299497718] [2023-08-27 15:40:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:40:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:40:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:40:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:40:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:40:59,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 290 [2023-08-27 15:40:59,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:40:59,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:40:59,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 290 [2023-08-27 15:40:59,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:00,053 INFO L124 PetriNetUnfolderBase]: 901/1570 cut-off events. [2023-08-27 15:41:00,053 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2023-08-27 15:41:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4283 conditions, 1570 events. 901/1570 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7655 event pairs, 201 based on Foata normal form. 124/1590 useless extension candidates. Maximal degree in co-relation 4271. Up to 1104 conditions per place. [2023-08-27 15:41:00,058 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 41 selfloop transitions, 6 changer transitions 1/51 dead transitions. [2023-08-27 15:41:00,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 290 flow [2023-08-27 15:41:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:41:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:41:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-27 15:41:00,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49885057471264366 [2023-08-27 15:41:00,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-27 15:41:00,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-27 15:41:00,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:00,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-27 15:41:00,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,062 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 132 flow. Second operand 3 states and 434 transitions. [2023-08-27 15:41:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 290 flow [2023-08-27 15:41:00,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:41:00,064 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 141 flow [2023-08-27 15:41:00,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-27 15:41:00,064 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-27 15:41:00,064 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 141 flow [2023-08-27 15:41:00,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:00,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:00,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 15:41:00,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:00,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash -459584993, now seen corresponding path program 1 times [2023-08-27 15:41:00,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:00,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187911027] [2023-08-27 15:41:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:00,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:00,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:00,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187911027] [2023-08-27 15:41:00,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187911027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:41:00,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:41:00,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:41:00,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775720287] [2023-08-27 15:41:00,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:41:00,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:41:00,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:00,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:41:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:41:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-27 15:41:00,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 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) [2023-08-27 15:41:00,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:00,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-27 15:41:00,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:00,289 INFO L124 PetriNetUnfolderBase]: 869/1614 cut-off events. [2023-08-27 15:41:00,290 INFO L125 PetriNetUnfolderBase]: For 1384/1390 co-relation queries the response was YES. [2023-08-27 15:41:00,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4488 conditions, 1614 events. 869/1614 cut-off events. For 1384/1390 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8063 event pairs, 347 based on Foata normal form. 2/1521 useless extension candidates. Maximal degree in co-relation 4476. Up to 943 conditions per place. [2023-08-27 15:41:00,295 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 3/58 dead transitions. [2023-08-27 15:41:00,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 327 flow [2023-08-27 15:41:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:41:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:41:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-27 15:41:00,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2023-08-27 15:41:00,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-27 15:41:00,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-27 15:41:00,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:00,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-27 15:41:00,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,299 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 141 flow. Second operand 3 states and 440 transitions. [2023-08-27 15:41:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 327 flow [2023-08-27 15:41:00,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:41:00,301 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 147 flow [2023-08-27 15:41:00,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-27 15:41:00,301 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-27 15:41:00,301 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 147 flow [2023-08-27 15:41:00,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 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) [2023-08-27 15:41:00,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:00,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 15:41:00,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:00,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1157068722, now seen corresponding path program 1 times [2023-08-27 15:41:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:00,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922591454] [2023-08-27 15:41:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:00,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:41:00,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860456869] [2023-08-27 15:41:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:00,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:00,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:00,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:00,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 15:41:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:00,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 15:41:00,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:00,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:41:00,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:00,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922591454] [2023-08-27 15:41:00,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 15:41:00,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860456869] [2023-08-27 15:41:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860456869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:41:00,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:41:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 15:41:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624217066] [2023-08-27 15:41:00,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:41:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:41:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:41:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 15:41:00,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-08-27 15:41:00,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:00,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-08-27 15:41:00,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:00,838 INFO L124 PetriNetUnfolderBase]: 1075/1996 cut-off events. [2023-08-27 15:41:00,838 INFO L125 PetriNetUnfolderBase]: For 1686/1692 co-relation queries the response was YES. [2023-08-27 15:41:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 1996 events. 1075/1996 cut-off events. For 1686/1692 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10042 event pairs, 325 based on Foata normal form. 16/1930 useless extension candidates. Maximal degree in co-relation 5497. Up to 833 conditions per place. [2023-08-27 15:41:00,845 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 68 selfloop transitions, 4 changer transitions 4/81 dead transitions. [2023-08-27 15:41:00,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 461 flow [2023-08-27 15:41:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:41:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:41:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-27 15:41:00,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2023-08-27 15:41:00,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-27 15:41:00,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-27 15:41:00,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:00,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-27 15:41:00,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,849 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 147 flow. Second operand 4 states and 576 transitions. [2023-08-27 15:41:00,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 461 flow [2023-08-27 15:41:00,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:41:00,852 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 170 flow [2023-08-27 15:41:00,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-27 15:41:00,852 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-08-27 15:41:00,852 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 170 flow [2023-08-27 15:41:00,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:00,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:00,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:00,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 15:41:01,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:01,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:01,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1509399063, now seen corresponding path program 1 times [2023-08-27 15:41:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320153721] [2023-08-27 15:41:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:01,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:41:01,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335021359] [2023-08-27 15:41:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:01,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:01,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:01,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:01,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 15:41:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:01,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 15:41:01,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:41:01,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 15:41:01,368 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 15:41:01,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:41:01,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-27 15:41:01,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-27 15:41:01,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-08-27 15:41:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:01,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:41:01,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320153721] [2023-08-27 15:41:01,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 15:41:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335021359] [2023-08-27 15:41:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335021359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:41:01,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:41:01,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-27 15:41:01,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327384964] [2023-08-27 15:41:01,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:41:01,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 15:41:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 15:41:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-27 15:41:01,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 290 [2023-08-27 15:41:01,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 170 flow. Second operand has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:01,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:01,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 290 [2023-08-27 15:41:01,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:02,166 INFO L124 PetriNetUnfolderBase]: 1599/2924 cut-off events. [2023-08-27 15:41:02,166 INFO L125 PetriNetUnfolderBase]: For 2761/2785 co-relation queries the response was YES. [2023-08-27 15:41:02,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8284 conditions, 2924 events. 1599/2924 cut-off events. For 2761/2785 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16006 event pairs, 422 based on Foata normal form. 34/2844 useless extension candidates. Maximal degree in co-relation 8267. Up to 1354 conditions per place. [2023-08-27 15:41:02,176 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 112 selfloop transitions, 24 changer transitions 3/144 dead transitions. [2023-08-27 15:41:02,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 831 flow [2023-08-27 15:41:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 15:41:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 15:41:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1154 transitions. [2023-08-27 15:41:02,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979310344827586 [2023-08-27 15:41:02,179 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1154 transitions. [2023-08-27 15:41:02,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1154 transitions. [2023-08-27 15:41:02,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:02,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1154 transitions. [2023-08-27 15:41:02,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.4) internal successors, (1154), 10 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:02,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:02,184 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:02,184 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 170 flow. Second operand 10 states and 1154 transitions. [2023-08-27 15:41:02,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 831 flow [2023-08-27 15:41:02,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 144 transitions, 818 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 15:41:02,188 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 365 flow [2023-08-27 15:41:02,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=365, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-08-27 15:41:02,188 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2023-08-27 15:41:02,188 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 365 flow [2023-08-27 15:41:02,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:02,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:02,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:02,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 15:41:02,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:02,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:02,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1581548763, now seen corresponding path program 2 times [2023-08-27 15:41:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241587962] [2023-08-27 15:41:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:02,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:02,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:41:02,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272646193] [2023-08-27 15:41:02,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:41:02,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:02,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 15:41:02,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:41:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:41:02,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 15:41:02,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:41:02,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 15:41:02,674 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 15:41:02,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:41:02,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-27 15:41:02,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-27 15:41:02,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-27 15:41:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:02,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:41:02,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241587962] [2023-08-27 15:41:02,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 15:41:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272646193] [2023-08-27 15:41:02,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272646193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:41:02,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:41:02,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-27 15:41:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606820291] [2023-08-27 15:41:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:41:02,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 15:41:02,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 15:41:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-27 15:41:02,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 290 [2023-08-27 15:41:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 365 flow. Second operand has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:02,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:02,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 290 [2023-08-27 15:41:02,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:03,722 INFO L124 PetriNetUnfolderBase]: 2285/4178 cut-off events. [2023-08-27 15:41:03,723 INFO L125 PetriNetUnfolderBase]: For 5611/5673 co-relation queries the response was YES. [2023-08-27 15:41:03,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12991 conditions, 4178 events. 2285/4178 cut-off events. For 5611/5673 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 24236 event pairs, 537 based on Foata normal form. 63/4207 useless extension candidates. Maximal degree in co-relation 12969. Up to 1206 conditions per place. [2023-08-27 15:41:03,738 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 134 selfloop transitions, 44 changer transitions 5/188 dead transitions. [2023-08-27 15:41:03,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 188 transitions, 1289 flow [2023-08-27 15:41:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 15:41:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 15:41:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1387 transitions. [2023-08-27 15:41:03,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985632183908046 [2023-08-27 15:41:03,742 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1387 transitions. [2023-08-27 15:41:03,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1387 transitions. [2023-08-27 15:41:03,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:03,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1387 transitions. [2023-08-27 15:41:03,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.58333333333333) internal successors, (1387), 12 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:03,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:03,748 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:03,748 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 365 flow. Second operand 12 states and 1387 transitions. [2023-08-27 15:41:03,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 188 transitions, 1289 flow [2023-08-27 15:41:03,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 188 transitions, 1287 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-27 15:41:03,758 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 681 flow [2023-08-27 15:41:03,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=681, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2023-08-27 15:41:03,759 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2023-08-27 15:41:03,759 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 681 flow [2023-08-27 15:41:03,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:03,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:03,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:03,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 15:41:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 15:41:03,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:03,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1814114205, now seen corresponding path program 1 times [2023-08-27 15:41:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:03,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080261852] [2023-08-27 15:41:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:03,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:03,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:41:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533525242] [2023-08-27 15:41:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:03,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:04,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 15:41:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:41:04,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-27 15:41:04,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:41:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:41:04,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:41:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:41:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080261852] [2023-08-27 15:41:04,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 15:41:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533525242] [2023-08-27 15:41:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533525242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:41:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:41:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 15:41:04,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812407715] [2023-08-27 15:41:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:41:04,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:41:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:41:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:41:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:41:04,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-27 15:41:04,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 681 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:04,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:41:04,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-27 15:41:04,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:41:04,368 INFO L124 PetriNetUnfolderBase]: 1987/3690 cut-off events. [2023-08-27 15:41:04,368 INFO L125 PetriNetUnfolderBase]: For 9076/9076 co-relation queries the response was YES. [2023-08-27 15:41:04,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12165 conditions, 3690 events. 1987/3690 cut-off events. For 9076/9076 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 19899 event pairs, 601 based on Foata normal form. 154/3820 useless extension candidates. Maximal degree in co-relation 12135. Up to 2396 conditions per place. [2023-08-27 15:41:04,422 INFO L140 encePairwiseOnDemand]: 284/290 looper letters, 93 selfloop transitions, 3 changer transitions 11/110 dead transitions. [2023-08-27 15:41:04,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 1098 flow [2023-08-27 15:41:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:41:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:41:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-27 15:41:04,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-27 15:41:04,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-27 15:41:04,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-27 15:41:04,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:41:04,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-27 15:41:04,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:04,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:04,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:04,427 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 681 flow. Second operand 3 states and 460 transitions. [2023-08-27 15:41:04,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 1098 flow [2023-08-27 15:41:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 1049 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-27 15:41:04,441 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 616 flow [2023-08-27 15:41:04,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=616, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-27 15:41:04,441 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2023-08-27 15:41:04,441 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 616 flow [2023-08-27 15:41:04,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:41:04,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:41:04,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:04,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 15:41:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:04,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 15:41:04,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:41:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2071604819, now seen corresponding path program 1 times [2023-08-27 15:41:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:41:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262846820] [2023-08-27 15:41:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:04,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:41:04,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 15:41:04,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668242630] [2023-08-27 15:41:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:41:04,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:41:04,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:41:04,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 15:41:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 15:41:04,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 15:41:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 15:41:04,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 15:41:04,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 15:41:04,909 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONASSERT (8 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 14 remaining) [2023-08-27 15:41:04,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONASSERT (5 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONASSERT (2 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 14 remaining) [2023-08-27 15:41:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 14 remaining) [2023-08-27 15:41:04,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 15:41:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:41:05,112 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:41:05,116 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 15:41:05,116 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 15:41:05,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 03:41:05 BasicIcfg [2023-08-27 15:41:05,163 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 15:41:05,163 INFO L158 Benchmark]: Toolchain (without parser) took 13287.05ms. Allocated memory was 316.7MB in the beginning and 551.6MB in the end (delta: 234.9MB). Free memory was 273.1MB in the beginning and 463.4MB in the end (delta: -190.3MB). Peak memory consumption was 46.6MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,163 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 316.7MB. Free memory was 294.9MB in the beginning and 294.7MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:41:05,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.51ms. Allocated memory is still 316.7MB. Free memory was 273.1MB in the beginning and 253.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,164 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.53ms. Allocated memory is still 316.7MB. Free memory was 253.1MB in the beginning and 251.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,164 INFO L158 Benchmark]: Boogie Preprocessor took 18.92ms. Allocated memory is still 316.7MB. Free memory was 251.0MB in the beginning and 248.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,164 INFO L158 Benchmark]: RCFGBuilder took 433.44ms. Allocated memory is still 316.7MB. Free memory was 248.9MB in the beginning and 229.0MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,164 INFO L158 Benchmark]: TraceAbstraction took 12422.72ms. Allocated memory was 316.7MB in the beginning and 551.6MB in the end (delta: 234.9MB). Free memory was 229.0MB in the beginning and 463.4MB in the end (delta: -234.4MB). Peak memory consumption was 2.6MB. Max. memory is 16.0GB. [2023-08-27 15:41:05,165 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 316.7MB. Free memory was 294.9MB in the beginning and 294.7MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 376.51ms. Allocated memory is still 316.7MB. Free memory was 273.1MB in the beginning and 253.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.53ms. Allocated memory is still 316.7MB. Free memory was 253.1MB in the beginning and 251.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.92ms. Allocated memory is still 316.7MB. Free memory was 251.0MB in the beginning and 248.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 433.44ms. Allocated memory is still 316.7MB. Free memory was 248.9MB in the beginning and 229.0MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 12422.72ms. Allocated memory was 316.7MB in the beginning and 551.6MB in the end (delta: 234.9MB). Free memory was 229.0MB in the beginning and 463.4MB in the end (delta: -234.4MB). Peak memory consumption was 2.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 208]: Unsoundness Warning unspecified type, defaulting to int C: short [208] - GenericResultAtLocation [Line: 209]: Unsoundness Warning unspecified type, defaulting to int C: short [209] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 140 PlacesBefore, 40 PlacesAfterwards, 145 TransitionsBefore, 40 TransitionsAfterwards, 5392 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 69 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 5 ChoiceCompositions, 134 TotalNumberOfCompositions, 11407 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7198, independent: 6883, independent conditional: 0, independent unconditional: 6883, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3005, independent: 2959, independent conditional: 0, independent unconditional: 2959, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7198, independent: 3924, independent conditional: 0, independent unconditional: 3924, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 3005, unknown conditional: 0, unknown unconditional: 3005] , Statistics on independence cache: Total cache size (in pairs): 244, Positive cache size: 225, Positive conditional cache size: 0, Positive unconditional cache size: 225, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 681]: assertion can be violated assertion can be violated We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=3, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] CALL 2 reach_error() [L681] COND FALSE 2 !(0) [L681] 2 __assert_fail ("0", "", 0, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={136:135}, buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: 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: 761]: 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: 724]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 724]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 681]: Unable to prove that assertion always holds Unable to prove that assertion always holds 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 227 locations, 14 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: 12.2s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 600 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1554 IncrementalHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 2 mSDtfsCounter, 1554 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=681occurred in iteration=13, InterpolantAutomatonStates: 60, 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: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 182 ConstructedInterpolants, 18 QuantifiedInterpolants, 1168 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1296 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 19/23 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! [2023-08-27 15:41:05,186 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...