/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/13-privatized_69-refine-protected-loop-interval_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:28:33,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:28:33,878 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:28:33,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:28:33,887 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:28:33,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:28:33,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:28:33,915 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:28:33,916 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:28:33,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:28:33,919 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:28:33,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:28:33,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:28:33,921 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:28:33,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:28:33,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:28:33,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:28:33,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:28:33,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:28:33,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:28:33,923 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:28:33,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:28:33,924 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:28:33,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:28:33,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:28:33,925 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:28:33,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:28:33,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:28:33,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:28:33,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:28:33,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:28:33,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:28:33,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:28:33,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:28:33,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:28:33,928 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:28:34,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:28:34,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:28:34,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:28:34,254 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:28:34,256 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:28:34,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_69-refine-protected-loop-interval_true.i [2023-08-26 12:28:35,527 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:28:35,796 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:28:35,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_69-refine-protected-loop-interval_true.i [2023-08-26 12:28:35,816 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8b0aefd9/8daf28b6fde54f4e8949c005d2a43329/FLAG109164cf0 [2023-08-26 12:28:35,830 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8b0aefd9/8daf28b6fde54f4e8949c005d2a43329 [2023-08-26 12:28:35,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:28:35,833 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:28:35,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:28:35,835 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:28:35,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:28:35,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:28:35" (1/1) ... [2023-08-26 12:28:35,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5f1881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:35, skipping insertion in model container [2023-08-26 12:28:35,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:28:35" (1/1) ... [2023-08-26 12:28:35,877 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:28:36,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:28:36,162 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:28:36,180 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 12:28:36,181 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-26 12:28:36,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:28:36,237 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:28:36,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36 WrapperNode [2023-08-26 12:28:36,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:28:36,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:28:36,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:28:36,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:28:36,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,299 INFO L138 Inliner]: procedures = 165, calls = 25, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 104 [2023-08-26 12:28:36,300 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:28:36,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:28:36,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:28:36,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:28:36,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:28:36,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:28:36,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:28:36,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:28:36,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (1/1) ... [2023-08-26 12:28:36,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:28:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:28:36,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:28:36,434 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-26 12:28:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-26 12:28:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:28:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:28:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:28:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:28:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:28:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:28:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:28:36,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:28:36,437 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:28:36,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:28:36,578 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:28:36,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:28:36,755 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:28:36,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:28:36,770 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 12:28:36,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:28:36 BoogieIcfgContainer [2023-08-26 12:28:36,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:28:36,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:28:36,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:28:36,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:28:36,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:28:35" (1/3) ... [2023-08-26 12:28:36,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357f50e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:28:36, skipping insertion in model container [2023-08-26 12:28:36,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:28:36" (2/3) ... [2023-08-26 12:28:36,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357f50e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:28:36, skipping insertion in model container [2023-08-26 12:28:36,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:28:36" (3/3) ... [2023-08-26 12:28:36,779 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_69-refine-protected-loop-interval_true.i [2023-08-26 12:28:36,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:28:36,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-26 12:28:36,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:28:36,864 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:28:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 116 transitions, 237 flow [2023-08-26 12:28:36,943 INFO L124 PetriNetUnfolderBase]: 12/115 cut-off events. [2023-08-26 12:28:36,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:36,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 115 events. 12/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 224 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-26 12:28:36,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 116 transitions, 237 flow [2023-08-26 12:28:36,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 115 transitions, 233 flow [2023-08-26 12:28:36,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:28:36,984 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 115 transitions, 233 flow [2023-08-26 12:28:36,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 115 transitions, 233 flow [2023-08-26 12:28:36,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 115 transitions, 233 flow [2023-08-26 12:28:37,032 INFO L124 PetriNetUnfolderBase]: 12/115 cut-off events. [2023-08-26 12:28:37,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:37,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 115 events. 12/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 224 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-26 12:28:37,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 3016 [2023-08-26 12:28:40,369 INFO L134 LiptonReduction]: Checked pairs total: 5421 [2023-08-26 12:28:40,369 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-26 12:28:40,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:28:40,387 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;@82212cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:28:40,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 12:28:40,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:28:40,388 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:28:40,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:40,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:40,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:28:40,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:40,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:40,394 INFO L85 PathProgramCache]: Analyzing trace with hash 492, now seen corresponding path program 1 times [2023-08-26 12:28:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:40,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843291188] [2023-08-26 12:28:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:40,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:40,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843291188] [2023-08-26 12:28:40,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843291188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:40,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:40,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:28:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584186711] [2023-08-26 12:28:40,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:28:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:28:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:28:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 238 [2023-08-26 12:28:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 30 transitions, 63 flow. Second operand has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:40,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 238 [2023-08-26 12:28:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:40,606 INFO L124 PetriNetUnfolderBase]: 75/146 cut-off events. [2023-08-26 12:28:40,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 146 events. 75/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 500 event pairs, 39 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 271. Up to 130 conditions per place. [2023-08-26 12:28:40,609 INFO L140 encePairwiseOnDemand]: 233/238 looper letters, 19 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-26 12:28:40,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 91 flow [2023-08-26 12:28:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:28:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:28:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2023-08-26 12:28:40,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49159663865546216 [2023-08-26 12:28:40,624 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2023-08-26 12:28:40,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2023-08-26 12:28:40,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:40,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2023-08-26 12:28:40,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,638 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,640 INFO L175 Difference]: Start difference. First operand has 27 places, 30 transitions, 63 flow. Second operand 2 states and 234 transitions. [2023-08-26 12:28:40,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 91 flow [2023-08-26 12:28:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:28:40,644 INFO L231 Difference]: Finished difference. Result has 24 places, 25 transitions, 52 flow [2023-08-26 12:28:40,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=25} [2023-08-26 12:28:40,649 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2023-08-26 12:28:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 52 flow [2023-08-26 12:28:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:40,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:28:40,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:28:40,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:40,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1581832690, now seen corresponding path program 1 times [2023-08-26 12:28:40,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:40,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648331012] [2023-08-26 12:28:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648331012] [2023-08-26 12:28:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648331012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:40,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:40,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:28:40,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272909433] [2023-08-26 12:28:40,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:40,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:28:40,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:28:40,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:28:40,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 238 [2023-08-26 12:28:40,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:40,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 238 [2023-08-26 12:28:40,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:40,966 INFO L124 PetriNetUnfolderBase]: 133/241 cut-off events. [2023-08-26 12:28:40,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:28:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 241 events. 133/241 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 724 event pairs, 64 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 483. Up to 191 conditions per place. [2023-08-26 12:28:40,968 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 30 selfloop transitions, 3 changer transitions 1/35 dead transitions. [2023-08-26 12:28:40,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 35 transitions, 140 flow [2023-08-26 12:28:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:28:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:28:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-26 12:28:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2023-08-26 12:28:40,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-26 12:28:40,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-26 12:28:40,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:40,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-26 12:28:40,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,975 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 52 flow. Second operand 3 states and 310 transitions. [2023-08-26 12:28:40,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 35 transitions, 140 flow [2023-08-26 12:28:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:28:40,976 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 78 flow [2023-08-26 12:28:40,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-26 12:28:40,977 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-26 12:28:40,977 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 78 flow [2023-08-26 12:28:40,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:40,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:40,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:40,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:28:40,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:40,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash -859231568, now seen corresponding path program 1 times [2023-08-26 12:28:40,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:40,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418878368] [2023-08-26 12:28:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:40,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:41,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:41,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418878368] [2023-08-26 12:28:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418878368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:41,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:41,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:28:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850017628] [2023-08-26 12:28:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:28:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:28:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:28:41,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 238 [2023-08-26 12:28:41,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:41,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 238 [2023-08-26 12:28:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:41,098 INFO L124 PetriNetUnfolderBase]: 23/71 cut-off events. [2023-08-26 12:28:41,098 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 12:28:41,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 71 events. 23/71 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 1 based on Foata normal form. 8/72 useless extension candidates. Maximal degree in co-relation 147. Up to 41 conditions per place. [2023-08-26 12:28:41,099 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 13 selfloop transitions, 6 changer transitions 3/29 dead transitions. [2023-08-26 12:28:41,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 126 flow [2023-08-26 12:28:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:28:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:28:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-26 12:28:41,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2023-08-26 12:28:41,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-26 12:28:41,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-26 12:28:41,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:41,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-26 12:28:41,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,106 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 78 flow. Second operand 3 states and 302 transitions. [2023-08-26 12:28:41,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 126 flow [2023-08-26 12:28:41,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:28:41,108 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 76 flow [2023-08-26 12:28:41,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-26 12:28:41,109 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-26 12:28:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 76 flow [2023-08-26 12:28:41,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:28:41,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:41,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1997837284, now seen corresponding path program 1 times [2023-08-26 12:28:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973318391] [2023-08-26 12:28:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:41,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:41,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973318391] [2023-08-26 12:28:41,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973318391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:41,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:41,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:28:41,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587887430] [2023-08-26 12:28:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:41,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:28:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:41,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:28:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:28:41,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 238 [2023-08-26 12:28:41,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:41,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 238 [2023-08-26 12:28:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:41,314 INFO L124 PetriNetUnfolderBase]: 27/86 cut-off events. [2023-08-26 12:28:41,314 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:28:41,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 86 events. 27/86 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 13 based on Foata normal form. 2/86 useless extension candidates. Maximal degree in co-relation 212. Up to 37 conditions per place. [2023-08-26 12:28:41,315 INFO L140 encePairwiseOnDemand]: 229/238 looper letters, 26 selfloop transitions, 8 changer transitions 3/38 dead transitions. [2023-08-26 12:28:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 190 flow [2023-08-26 12:28:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:28:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:28:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 573 transitions. [2023-08-26 12:28:41,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012605042016807 [2023-08-26 12:28:41,318 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 573 transitions. [2023-08-26 12:28:41,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 573 transitions. [2023-08-26 12:28:41,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:41,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 573 transitions. [2023-08-26 12:28:41,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.5) internal successors, (573), 6 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,338 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,338 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 76 flow. Second operand 6 states and 573 transitions. [2023-08-26 12:28:41,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 190 flow [2023-08-26 12:28:41,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:28:41,340 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 124 flow [2023-08-26 12:28:41,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-08-26 12:28:41,341 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2023-08-26 12:28:41,341 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 124 flow [2023-08-26 12:28:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:41,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:41,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:28:41,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr1ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:41,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1803412960, now seen corresponding path program 1 times [2023-08-26 12:28:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:41,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740981186] [2023-08-26 12:28:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:41,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:41,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740981186] [2023-08-26 12:28:41,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740981186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:41,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:41,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:28:41,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868964148] [2023-08-26 12:28:41,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:41,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:28:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:28:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:28:41,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 238 [2023-08-26 12:28:41,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:41,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 238 [2023-08-26 12:28:41,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:41,513 INFO L124 PetriNetUnfolderBase]: 36/108 cut-off events. [2023-08-26 12:28:41,514 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 12:28:41,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 108 events. 36/108 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 266 event pairs, 9 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 304. Up to 41 conditions per place. [2023-08-26 12:28:41,515 INFO L140 encePairwiseOnDemand]: 231/238 looper letters, 43 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2023-08-26 12:28:41,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 354 flow [2023-08-26 12:28:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:28:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:28:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 465 transitions. [2023-08-26 12:28:41,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907563025210084 [2023-08-26 12:28:41,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 465 transitions. [2023-08-26 12:28:41,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 465 transitions. [2023-08-26 12:28:41,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:41,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 465 transitions. [2023-08-26 12:28:41,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,522 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 124 flow. Second operand 5 states and 465 transitions. [2023-08-26 12:28:41,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 354 flow [2023-08-26 12:28:41,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:28:41,525 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 216 flow [2023-08-26 12:28:41,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-26 12:28:41,525 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2023-08-26 12:28:41,526 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 216 flow [2023-08-26 12:28:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:28:41,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:41,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 613320088, now seen corresponding path program 2 times [2023-08-26 12:28:41,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286153138] [2023-08-26 12:28:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286153138] [2023-08-26 12:28:41,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286153138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:28:41,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859713641] [2023-08-26 12:28:41,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:28:41,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:28:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:28:41,615 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) [2023-08-26 12:28:41,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:28:41,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:28:41,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:28:41,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:28:41,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:28:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:41,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:28:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859713641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:41,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:28:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-08-26 12:28:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038664746] [2023-08-26 12:28:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:28:41,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:28:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:28:41,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 238 [2023-08-26 12:28:41,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:41,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 238 [2023-08-26 12:28:41,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:41,933 INFO L124 PetriNetUnfolderBase]: 42/130 cut-off events. [2023-08-26 12:28:41,933 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-08-26 12:28:41,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 130 events. 42/130 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 326 event pairs, 19 based on Foata normal form. 4/134 useless extension candidates. Maximal degree in co-relation 407. Up to 55 conditions per place. [2023-08-26 12:28:41,935 INFO L140 encePairwiseOnDemand]: 230/238 looper letters, 41 selfloop transitions, 13 changer transitions 3/58 dead transitions. [2023-08-26 12:28:41,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 416 flow [2023-08-26 12:28:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:28:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:28:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 851 transitions. [2023-08-26 12:28:41,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972922502334267 [2023-08-26 12:28:41,938 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 851 transitions. [2023-08-26 12:28:41,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 851 transitions. [2023-08-26 12:28:41,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:41,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 851 transitions. [2023-08-26 12:28:41,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.55555555555556) internal successors, (851), 9 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,943 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 216 flow. Second operand 9 states and 851 transitions. [2023-08-26 12:28:41,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 416 flow [2023-08-26 12:28:41,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:28:41,947 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 298 flow [2023-08-26 12:28:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-26 12:28:41,948 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-08-26 12:28:41,948 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 298 flow [2023-08-26 12:28:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.28571428571429) internal successors, (639), 7 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:41,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:41,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 12:28:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-26 12:28:42,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:42,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1476098412, now seen corresponding path program 1 times [2023-08-26 12:28:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510388589] [2023-08-26 12:28:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:42,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:42,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510388589] [2023-08-26 12:28:42,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510388589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:42,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:42,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:28:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799000785] [2023-08-26 12:28:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:42,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:28:42,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:28:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:28:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 238 [2023-08-26 12:28:42,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 238 [2023-08-26 12:28:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:42,337 INFO L124 PetriNetUnfolderBase]: 47/144 cut-off events. [2023-08-26 12:28:42,338 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2023-08-26 12:28:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 144 events. 47/144 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 367 event pairs, 16 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 503. Up to 57 conditions per place. [2023-08-26 12:28:42,339 INFO L140 encePairwiseOnDemand]: 230/238 looper letters, 34 selfloop transitions, 18 changer transitions 7/60 dead transitions. [2023-08-26 12:28:42,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 507 flow [2023-08-26 12:28:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:28:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:28:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-08-26 12:28:42,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061624649859944 [2023-08-26 12:28:42,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-08-26 12:28:42,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-08-26 12:28:42,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:42,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-08-26 12:28:42,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,347 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 238.0) internal successors, (1666), 7 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,350 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 298 flow. Second operand 6 states and 580 transitions. [2023-08-26 12:28:42,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 507 flow [2023-08-26 12:28:42,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 483 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-26 12:28:42,356 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 360 flow [2023-08-26 12:28:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-26 12:28:42,357 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-08-26 12:28:42,358 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 360 flow [2023-08-26 12:28:42,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:28:42,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:28:42,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:28:42,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 12:28:42,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:28:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1366965792, now seen corresponding path program 2 times [2023-08-26 12:28:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:28:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457341115] [2023-08-26 12:28:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:28:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:28:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:28:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:28:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:28:42,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457341115] [2023-08-26 12:28:42,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457341115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:28:42,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:28:42,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:28:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789196718] [2023-08-26 12:28:42,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:28:42,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:28:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:28:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:28:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:28:42,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 238 [2023-08-26 12:28:42,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 360 flow. Second operand has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:28:42,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 238 [2023-08-26 12:28:42,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:28:42,518 INFO L124 PetriNetUnfolderBase]: 44/135 cut-off events. [2023-08-26 12:28:42,519 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2023-08-26 12:28:42,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 135 events. 44/135 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 334 event pairs, 19 based on Foata normal form. 2/137 useless extension candidates. Maximal degree in co-relation 497. Up to 83 conditions per place. [2023-08-26 12:28:42,520 INFO L140 encePairwiseOnDemand]: 229/238 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2023-08-26 12:28:42,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 461 flow [2023-08-26 12:28:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:28:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:28:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 638 transitions. [2023-08-26 12:28:42,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382953181272509 [2023-08-26 12:28:42,523 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 638 transitions. [2023-08-26 12:28:42,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 638 transitions. [2023-08-26 12:28:42,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:28:42,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 638 transitions. [2023-08-26 12:28:42,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.14285714285714) internal successors, (638), 7 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,532 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 360 flow. Second operand 7 states and 638 transitions. [2023-08-26 12:28:42,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 461 flow [2023-08-26 12:28:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 432 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 12:28:42,535 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-26 12:28:42,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-26 12:28:42,537 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2023-08-26 12:28:42,537 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-26 12:28:42,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:28:42,540 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 12:28:42,541 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 12:28:42,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-26 12:28:42,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2023-08-26 12:28:42,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 12:28:42,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 12:28:42,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 12:28:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:28:42,545 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-26 12:28:42,549 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:28:42,549 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:28:42,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:28:42 BasicIcfg [2023-08-26 12:28:42,556 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:28:42,556 INFO L158 Benchmark]: Toolchain (without parser) took 6722.70ms. Allocated memory was 364.9MB in the beginning and 438.3MB in the end (delta: 73.4MB). Free memory was 320.5MB in the beginning and 260.4MB in the end (delta: 60.1MB). Peak memory consumption was 135.6MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,556 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 364.9MB. Free memory was 341.3MB in the beginning and 341.2MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:28:42,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.60ms. Allocated memory is still 364.9MB. Free memory was 320.5MB in the beginning and 301.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,557 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.53ms. Allocated memory is still 364.9MB. Free memory was 301.7MB in the beginning and 299.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,557 INFO L158 Benchmark]: Boogie Preprocessor took 52.20ms. Allocated memory is still 364.9MB. Free memory was 299.6MB in the beginning and 297.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,557 INFO L158 Benchmark]: RCFGBuilder took 418.11ms. Allocated memory is still 364.9MB. Free memory was 297.5MB in the beginning and 280.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,558 INFO L158 Benchmark]: TraceAbstraction took 5782.09ms. Allocated memory was 364.9MB in the beginning and 438.3MB in the end (delta: 73.4MB). Free memory was 279.6MB in the beginning and 260.4MB in the end (delta: 19.2MB). Peak memory consumption was 95.8MB. Max. memory is 16.0GB. [2023-08-26 12:28:42,561 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 364.9MB. Free memory was 341.3MB in the beginning and 341.2MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 403.60ms. Allocated memory is still 364.9MB. Free memory was 320.5MB in the beginning and 301.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.53ms. Allocated memory is still 364.9MB. Free memory was 301.7MB in the beginning and 299.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 52.20ms. Allocated memory is still 364.9MB. Free memory was 299.6MB in the beginning and 297.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 418.11ms. Allocated memory is still 364.9MB. Free memory was 297.5MB in the beginning and 280.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 5782.09ms. Allocated memory was 364.9MB in the beginning and 438.3MB in the end (delta: 73.4MB). Free memory was 279.6MB in the beginning and 260.4MB in the end (delta: 19.2MB). Peak memory consumption was 95.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 107 PlacesBefore, 27 PlacesAfterwards, 115 TransitionsBefore, 30 TransitionsAfterwards, 3016 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 27 ConcurrentYvCompositions, 5 ChoiceCompositions, 122 TotalNumberOfCompositions, 5421 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3447, independent: 3268, independent conditional: 0, independent unconditional: 3268, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1679, independent: 1641, independent conditional: 0, independent unconditional: 1641, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3447, independent: 1627, independent conditional: 0, independent unconditional: 1627, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1679, unknown conditional: 0, unknown unconditional: 1679] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 75, Positive conditional cache size: 0, Positive unconditional cache size: 75, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 150 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.7s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 127 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 585 IncrementalHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 17 mSDtfsCounter, 585 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=360occurred in iteration=7, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 271 SizeOfPredicates, 4 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 9 InterpolantComputations, 8 PerfectInterpolantSequences, 15/19 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:28:42,578 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...