/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.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/pthread-ext/26_stack_cas_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:53:55,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:53:55,904 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 17:53:55,909 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:53:55,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:53:55,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:53:55,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:53:55,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:53:55,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:53:55,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:53:55,949 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:53:55,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:53:55,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:53:55,951 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:53:55,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:53:55,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:53:55,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:53:55,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:53:55,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:53:55,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:53:55,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:53:55,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:53:55,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:53:55,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:53:55,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:53:55,954 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:53:55,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:53:55,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:53:55,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:53:55,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:53:55,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:53:55,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:53:55,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:53:55,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:53:55,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:53:55,957 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:53:56,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:53:56,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:53:56,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:53:56,252 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:53:56,252 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:53:56,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-26 17:53:57,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:53:57,740 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:53:57,741 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-26 17:53:57,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842a33d91/bf40572f09d44ceaa0e67173135f4094/FLAGddff26eef [2023-08-26 17:53:57,777 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842a33d91/bf40572f09d44ceaa0e67173135f4094 [2023-08-26 17:53:57,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:53:57,783 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:53:57,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:53:57,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:53:57,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:53:57,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:53:57" (1/1) ... [2023-08-26 17:53:57,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e3f58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:57, skipping insertion in model container [2023-08-26 17:53:57,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:53:57" (1/1) ... [2023-08-26 17:53:57,836 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:53:58,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:53:58,160 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:53:58,185 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 17:53:58,187 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 17:53:58,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:53:58,237 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:53:58,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58 WrapperNode [2023-08-26 17:53:58,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:53:58,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:53:58,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:53:58,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:53:58,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,297 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 193 [2023-08-26 17:53:58,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:53:58,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:53:58,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:53:58,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:53:58,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,319 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:53:58,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:53:58,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:53:58,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:53:58,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (1/1) ... [2023-08-26 17:53:58,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:53:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:53:58,386 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 17:53:58,396 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 17:53:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:53:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 17:53:58,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:53:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:53:58,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:53:58,417 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 17:53:58,525 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:53:58,526 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:53:58,824 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:53:59,021 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:53:59,021 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 17:53:59,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:53:59 BoogieIcfgContainer [2023-08-26 17:53:59,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:53:59,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:53:59,025 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:53:59,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:53:59,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:53:57" (1/3) ... [2023-08-26 17:53:59,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a26ecf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:53:59, skipping insertion in model container [2023-08-26 17:53:59,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:53:58" (2/3) ... [2023-08-26 17:53:59,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a26ecf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:53:59, skipping insertion in model container [2023-08-26 17:53:59,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:53:59" (3/3) ... [2023-08-26 17:53:59,045 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-26 17:53:59,059 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:53:59,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-08-26 17:53:59,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:53:59,147 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 17:53:59,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,256 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 17:53:59,257 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:53:59,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 168 events. 11/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 303 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-08-26 17:53:59,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,273 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:53:59,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 17:53:59,346 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 17:53:59,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:53:59,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 168 events. 11/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 303 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-08-26 17:53:59,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 3540 [2023-08-26 17:54:05,958 INFO L134 LiptonReduction]: Checked pairs total: 5664 [2023-08-26 17:54:05,958 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-26 17:54:05,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:54:05,973 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;@7ca70654, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:54:05,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-08-26 17:54:05,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:54:05,975 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 17:54:05,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:05,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:05,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 17:54:05,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:05,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 31782, now seen corresponding path program 1 times [2023-08-26 17:54:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152958782] [2023-08-26 17:54:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:06,190 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 17:54:06,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152958782] [2023-08-26 17:54:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152958782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:06,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:54:06,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477118916] [2023-08-26 17:54:06,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:06,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:06,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 327 [2023-08-26 17:54:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 17:54:06,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:06,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 327 [2023-08-26 17:54:06,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:06,453 INFO L124 PetriNetUnfolderBase]: 246/539 cut-off events. [2023-08-26 17:54:06,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:06,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 539 events. 246/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2377 event pairs, 126 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 1050. Up to 282 conditions per place. [2023-08-26 17:54:06,457 INFO L140 encePairwiseOnDemand]: 303/327 looper letters, 78 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-26 17:54:06,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 83 transitions, 335 flow [2023-08-26 17:54:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 17:54:06,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38837920489296635 [2023-08-26 17:54:06,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 17:54:06,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 17:54:06,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:06,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 17:54:06,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 17:54:06,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:06,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:06,492 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 141 flow. Second operand 3 states and 381 transitions. [2023-08-26 17:54:06,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 83 transitions, 335 flow [2023-08-26 17:54:06,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:54:06,497 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 133 flow [2023-08-26 17:54:06,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-26 17:54:06,502 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -13 predicate places. [2023-08-26 17:54:06,502 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 133 flow [2023-08-26 17:54:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 17:54:06,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:06,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 17:54:06,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:54:06,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:06,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash 31784, now seen corresponding path program 1 times [2023-08-26 17:54:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:06,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553745084] [2023-08-26 17:54:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:06,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:06,638 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 17:54:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553745084] [2023-08-26 17:54:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553745084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:06,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:06,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:54:06,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881564634] [2023-08-26 17:54:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:06,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 17:54:06,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 133 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 17:54:06,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:06,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 17:54:06,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:06,739 INFO L124 PetriNetUnfolderBase]: 172/402 cut-off events. [2023-08-26 17:54:06,739 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-26 17:54:06,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 402 events. 172/402 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1677 event pairs, 120 based on Foata normal form. 61/319 useless extension candidates. Maximal degree in co-relation 905. Up to 385 conditions per place. [2023-08-26 17:54:06,741 INFO L140 encePairwiseOnDemand]: 325/327 looper letters, 47 selfloop transitions, 1 changer transitions 1/51 dead transitions. [2023-08-26 17:54:06,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 229 flow [2023-08-26 17:54:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 17:54:06,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292558613659531 [2023-08-26 17:54:06,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 17:54:06,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 17:54:06,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:06,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 17:54:06,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 17:54:06,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:06,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:06,748 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 133 flow. Second operand 3 states and 323 transitions. [2023-08-26 17:54:06,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 229 flow [2023-08-26 17:54:06,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:06,750 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 123 flow [2023-08-26 17:54:06,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-26 17:54:06,751 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 17:54:06,752 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 123 flow [2023-08-26 17:54:06,752 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 17:54:06,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:06,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 17:54:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:54:06,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:06,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 30568877, now seen corresponding path program 1 times [2023-08-26 17:54:06,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732220787] [2023-08-26 17:54:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:06,874 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 17:54:06,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732220787] [2023-08-26 17:54:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732220787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:06,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:06,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:06,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423065907] [2023-08-26 17:54:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:54:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:54:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:54:06,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 327 [2023-08-26 17:54:06,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 17:54:06,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:06,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 327 [2023-08-26 17:54:06,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:07,044 INFO L124 PetriNetUnfolderBase]: 174/419 cut-off events. [2023-08-26 17:54:07,044 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-26 17:54:07,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 419 events. 174/419 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1838 event pairs, 114 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 942. Up to 246 conditions per place. [2023-08-26 17:54:07,047 INFO L140 encePairwiseOnDemand]: 322/327 looper letters, 72 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-26 17:54:07,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 329 flow [2023-08-26 17:54:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-26 17:54:07,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3394495412844037 [2023-08-26 17:54:07,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-26 17:54:07,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-26 17:54:07,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:07,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-26 17:54:07,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 17:54:07,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,053 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 123 flow. Second operand 3 states and 333 transitions. [2023-08-26 17:54:07,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 329 flow [2023-08-26 17:54:07,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:07,056 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 139 flow [2023-08-26 17:54:07,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-26 17:54:07,056 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -15 predicate places. [2023-08-26 17:54:07,057 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 139 flow [2023-08-26 17:54:07,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 17:54:07,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:07,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 17:54:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:54:07,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:07,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 30569005, now seen corresponding path program 1 times [2023-08-26 17:54:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892895956] [2023-08-26 17:54:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:07,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:07,126 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 17:54:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892895956] [2023-08-26 17:54:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892895956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:54:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945129] [2023-08-26 17:54:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:07,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 17:54:07,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 17:54:07,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:07,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 17:54:07,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:07,221 INFO L124 PetriNetUnfolderBase]: 159/400 cut-off events. [2023-08-26 17:54:07,221 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 17:54:07,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 400 events. 159/400 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1761 event pairs, 127 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 901. Up to 370 conditions per place. [2023-08-26 17:54:07,223 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-26 17:54:07,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 223 flow [2023-08-26 17:54:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-26 17:54:07,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3251783893985729 [2023-08-26 17:54:07,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-26 17:54:07,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-26 17:54:07,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:07,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-26 17:54:07,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 17:54:07,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,229 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 139 flow. Second operand 3 states and 319 transitions. [2023-08-26 17:54:07,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 223 flow [2023-08-26 17:54:07,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:07,231 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 132 flow [2023-08-26 17:54:07,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-26 17:54:07,232 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -17 predicate places. [2023-08-26 17:54:07,232 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 132 flow [2023-08-26 17:54:07,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 17:54:07,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:07,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 17:54:07,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:54:07,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:07,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 30568878, now seen corresponding path program 1 times [2023-08-26 17:54:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948315814] [2023-08-26 17:54:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:07,315 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 17:54:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948315814] [2023-08-26 17:54:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948315814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:07,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060427066] [2023-08-26 17:54:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:07,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:54:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:54:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:54:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 327 [2023-08-26 17:54:07,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 17:54:07,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:07,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 327 [2023-08-26 17:54:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:07,393 INFO L124 PetriNetUnfolderBase]: 155/389 cut-off events. [2023-08-26 17:54:07,393 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-26 17:54:07,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 883 conditions, 389 events. 155/389 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1715 event pairs, 123 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 871. Up to 360 conditions per place. [2023-08-26 17:54:07,395 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 17:54:07,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 214 flow [2023-08-26 17:54:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-08-26 17:54:07,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32823649337410804 [2023-08-26 17:54:07,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-08-26 17:54:07,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-08-26 17:54:07,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:07,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-08-26 17:54:07,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 17:54:07,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,401 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 132 flow. Second operand 3 states and 322 transitions. [2023-08-26 17:54:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 214 flow [2023-08-26 17:54:07,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:07,403 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 129 flow [2023-08-26 17:54:07,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-26 17:54:07,404 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -18 predicate places. [2023-08-26 17:54:07,404 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 129 flow [2023-08-26 17:54:07,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 17:54:07,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:07,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:54:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:54:07,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:07,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 947636045, now seen corresponding path program 1 times [2023-08-26 17:54:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67578932] [2023-08-26 17:54:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:07,457 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 17:54:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67578932] [2023-08-26 17:54:07,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67578932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:07,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:07,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455415699] [2023-08-26 17:54:07,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:07,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:54:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:54:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:54:07,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 327 [2023-08-26 17:54:07,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 17:54:07,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 327 [2023-08-26 17:54:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:07,596 INFO L124 PetriNetUnfolderBase]: 159/369 cut-off events. [2023-08-26 17:54:07,596 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-26 17:54:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 369 events. 159/369 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1494 event pairs, 74 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 839. Up to 137 conditions per place. [2023-08-26 17:54:07,598 INFO L140 encePairwiseOnDemand]: 318/327 looper letters, 62 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-08-26 17:54:07,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 325 flow [2023-08-26 17:54:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:54:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:54:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 409 transitions. [2023-08-26 17:54:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31269113149847094 [2023-08-26 17:54:07,600 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 409 transitions. [2023-08-26 17:54:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 409 transitions. [2023-08-26 17:54:07,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:07,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 409 transitions. [2023-08-26 17:54:07,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 17:54:07,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:07,604 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:07,604 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 129 flow. Second operand 4 states and 409 transitions. [2023-08-26 17:54:07,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 325 flow [2023-08-26 17:54:07,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:07,606 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 168 flow [2023-08-26 17:54:07,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-26 17:54:07,607 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -15 predicate places. [2023-08-26 17:54:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 168 flow [2023-08-26 17:54:07,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 17:54:07,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:07,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:54:07,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:07,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash 149080917, now seen corresponding path program 1 times [2023-08-26 17:54:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300726379] [2023-08-26 17:54:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:07,630 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 17:54:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300726379] [2023-08-26 17:54:07,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300726379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:07,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:07,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612186545] [2023-08-26 17:54:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:07,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:07,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:07,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 327 [2023-08-26 17:54:07,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 17:54:07,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:07,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 327 [2023-08-26 17:54:07,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:07,714 INFO L124 PetriNetUnfolderBase]: 151/372 cut-off events. [2023-08-26 17:54:07,715 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-26 17:54:07,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 372 events. 151/372 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1579 event pairs, 50 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 912. Up to 338 conditions per place. [2023-08-26 17:54:07,717 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 42 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-26 17:54:07,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 260 flow [2023-08-26 17:54:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 17:54:07,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659531090723751 [2023-08-26 17:54:07,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 17:54:07,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 17:54:07,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:07,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 17:54:07,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:07,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:07,722 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 168 flow. Second operand 3 states and 359 transitions. [2023-08-26 17:54:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 260 flow [2023-08-26 17:54:07,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 255 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:07,724 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 165 flow [2023-08-26 17:54:07,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-26 17:54:07,725 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 17:54:07,725 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 165 flow [2023-08-26 17:54:07,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 17:54:07,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:07,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:54:07,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:07,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 208027579, now seen corresponding path program 1 times [2023-08-26 17:54:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776263821] [2023-08-26 17:54:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:07,938 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 17:54:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776263821] [2023-08-26 17:54:07,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776263821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:07,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:07,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660867023] [2023-08-26 17:54:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:07,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:54:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:54:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:54:07,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 327 [2023-08-26 17:54:07,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 17:54:07,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:07,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 327 [2023-08-26 17:54:07,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:08,021 INFO L124 PetriNetUnfolderBase]: 146/358 cut-off events. [2023-08-26 17:54:08,021 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-26 17:54:08,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 358 events. 146/358 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1494 event pairs, 112 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 883. Up to 334 conditions per place. [2023-08-26 17:54:08,023 INFO L140 encePairwiseOnDemand]: 325/327 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 17:54:08,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 245 flow [2023-08-26 17:54:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-26 17:54:08,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3109072375127421 [2023-08-26 17:54:08,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-26 17:54:08,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-26 17:54:08,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:08,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-26 17:54:08,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 17:54:08,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,028 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 165 flow. Second operand 3 states and 305 transitions. [2023-08-26 17:54:08,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 245 flow [2023-08-26 17:54:08,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:08,030 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 161 flow [2023-08-26 17:54:08,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-26 17:54:08,032 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -15 predicate places. [2023-08-26 17:54:08,032 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 161 flow [2023-08-26 17:54:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 17:54:08,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:08,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:08,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:54:08,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:08,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2141080974, now seen corresponding path program 1 times [2023-08-26 17:54:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805984150] [2023-08-26 17:54:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:08,157 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 17:54:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805984150] [2023-08-26 17:54:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805984150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:08,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:08,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:54:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140312074] [2023-08-26 17:54:08,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:08,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:54:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:54:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:54:08,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 327 [2023-08-26 17:54:08,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 17:54:08,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:08,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 327 [2023-08-26 17:54:08,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:08,260 INFO L124 PetriNetUnfolderBase]: 139/322 cut-off events. [2023-08-26 17:54:08,260 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-26 17:54:08,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 322 events. 139/322 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1218 event pairs, 50 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 812. Up to 143 conditions per place. [2023-08-26 17:54:08,262 INFO L140 encePairwiseOnDemand]: 319/327 looper letters, 53 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2023-08-26 17:54:08,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 333 flow [2023-08-26 17:54:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:54:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:54:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-08-26 17:54:08,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31116207951070335 [2023-08-26 17:54:08,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-08-26 17:54:08,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-08-26 17:54:08,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:08,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-08-26 17:54:08,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 17:54:08,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:08,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:08,268 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 161 flow. Second operand 4 states and 407 transitions. [2023-08-26 17:54:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 333 flow [2023-08-26 17:54:08,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:08,271 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 196 flow [2023-08-26 17:54:08,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-26 17:54:08,271 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -13 predicate places. [2023-08-26 17:54:08,272 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 196 flow [2023-08-26 17:54:08,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 17:54:08,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:08,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:08,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:54:08,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:08,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash -289423631, now seen corresponding path program 1 times [2023-08-26 17:54:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:08,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322252152] [2023-08-26 17:54:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:08,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:08,311 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 17:54:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322252152] [2023-08-26 17:54:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322252152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:08,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:08,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82299247] [2023-08-26 17:54:08,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:08,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:08,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 327 [2023-08-26 17:54:08,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 17:54:08,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:08,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 327 [2023-08-26 17:54:08,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:08,389 INFO L124 PetriNetUnfolderBase]: 131/314 cut-off events. [2023-08-26 17:54:08,389 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-26 17:54:08,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 314 events. 131/314 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1218 event pairs, 56 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 838. Up to 261 conditions per place. [2023-08-26 17:54:08,391 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 43 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-26 17:54:08,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 300 flow [2023-08-26 17:54:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-08-26 17:54:08,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36493374108053006 [2023-08-26 17:54:08,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-08-26 17:54:08,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-08-26 17:54:08,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:08,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-08-26 17:54:08,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 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 17:54:08,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,396 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 196 flow. Second operand 3 states and 358 transitions. [2023-08-26 17:54:08,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 300 flow [2023-08-26 17:54:08,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 292 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:08,398 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 196 flow [2023-08-26 17:54:08,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-26 17:54:08,399 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -12 predicate places. [2023-08-26 17:54:08,399 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 196 flow [2023-08-26 17:54:08,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 17:54:08,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:08,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:08,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 17:54:08,400 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:08,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -289421895, now seen corresponding path program 1 times [2023-08-26 17:54:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:08,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990954597] [2023-08-26 17:54:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:08,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:08,485 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 17:54:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990954597] [2023-08-26 17:54:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990954597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:54:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708937491] [2023-08-26 17:54:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:54:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:54:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:54:08,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:54:08,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 17:54:08,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:08,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:54:08,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:08,666 INFO L124 PetriNetUnfolderBase]: 208/495 cut-off events. [2023-08-26 17:54:08,666 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-08-26 17:54:08,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 495 events. 208/495 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2324 event pairs, 23 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 1337. Up to 207 conditions per place. [2023-08-26 17:54:08,669 INFO L140 encePairwiseOnDemand]: 317/327 looper letters, 81 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-08-26 17:54:08,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 554 flow [2023-08-26 17:54:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:54:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:54:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 725 transitions. [2023-08-26 17:54:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3167321974661424 [2023-08-26 17:54:08,672 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 725 transitions. [2023-08-26 17:54:08,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 725 transitions. [2023-08-26 17:54:08,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:08,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 725 transitions. [2023-08-26 17:54:08,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.57142857142857) internal successors, (725), 7 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 17:54:08,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 17:54:08,677 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 17:54:08,678 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 196 flow. Second operand 7 states and 725 transitions. [2023-08-26 17:54:08,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 554 flow [2023-08-26 17:54:08,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 550 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:08,681 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 288 flow [2023-08-26 17:54:08,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-08-26 17:54:08,681 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -3 predicate places. [2023-08-26 17:54:08,681 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 288 flow [2023-08-26 17:54:08,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 17:54:08,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:08,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:08,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 17:54:08,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err38ASSERT_VIOLATIONASSERT === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:08,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash -382142034, now seen corresponding path program 1 times [2023-08-26 17:54:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:08,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935757368] [2023-08-26 17:54:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:08,776 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 17:54:08,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935757368] [2023-08-26 17:54:08,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935757368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:08,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:08,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:08,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465260718] [2023-08-26 17:54:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:08,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:08,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:08,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 327 [2023-08-26 17:54:08,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 17:54:08,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:08,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 327 [2023-08-26 17:54:08,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:08,940 INFO L124 PetriNetUnfolderBase]: 353/836 cut-off events. [2023-08-26 17:54:08,940 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2023-08-26 17:54:08,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 836 events. 353/836 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4720 event pairs, 212 based on Foata normal form. 10/618 useless extension candidates. Maximal degree in co-relation 2503. Up to 471 conditions per place. [2023-08-26 17:54:08,946 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 76 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-08-26 17:54:08,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 652 flow [2023-08-26 17:54:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-26 17:54:08,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904179408766565 [2023-08-26 17:54:08,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-26 17:54:08,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-26 17:54:08,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:08,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-26 17:54:08,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 17:54:08,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:08,951 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 288 flow. Second operand 3 states and 383 transitions. [2023-08-26 17:54:08,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 652 flow [2023-08-26 17:54:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 621 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:08,955 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 369 flow [2023-08-26 17:54:08,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-08-26 17:54:08,956 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2023-08-26 17:54:08,956 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 369 flow [2023-08-26 17:54:08,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 17:54:08,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:08,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:08,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:54:08,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:08,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2019341937, now seen corresponding path program 1 times [2023-08-26 17:54:08,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:08,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894564109] [2023-08-26 17:54:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:08,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:09,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:09,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894564109] [2023-08-26 17:54:09,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894564109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:09,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:09,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:54:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11832611] [2023-08-26 17:54:09,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:54:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:54:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:54:09,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:54:09,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:09,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:09,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:54:09,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:09,206 INFO L124 PetriNetUnfolderBase]: 328/780 cut-off events. [2023-08-26 17:54:09,207 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2023-08-26 17:54:09,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 780 events. 328/780 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3847 event pairs, 54 based on Foata normal form. 3/579 useless extension candidates. Maximal degree in co-relation 2355. Up to 620 conditions per place. [2023-08-26 17:54:09,212 INFO L140 encePairwiseOnDemand]: 320/327 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-08-26 17:54:09,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 587 flow [2023-08-26 17:54:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:54:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:54:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 611 transitions. [2023-08-26 17:54:09,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3114169215086646 [2023-08-26 17:54:09,215 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 611 transitions. [2023-08-26 17:54:09,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 611 transitions. [2023-08-26 17:54:09,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:09,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 611 transitions. [2023-08-26 17:54:09,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.83333333333333) internal successors, (611), 6 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:09,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 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 17:54:09,220 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 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 17:54:09,220 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 369 flow. Second operand 6 states and 611 transitions. [2023-08-26 17:54:09,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 587 flow [2023-08-26 17:54:09,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:09,224 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 357 flow [2023-08-26 17:54:09,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-08-26 17:54:09,225 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-08-26 17:54:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 357 flow [2023-08-26 17:54:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:09,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:09,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 17:54:09,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:09,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:09,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1038460845, now seen corresponding path program 1 times [2023-08-26 17:54:09,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:09,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499473687] [2023-08-26 17:54:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:09,328 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 17:54:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499473687] [2023-08-26 17:54:09,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499473687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:09,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:09,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928277663] [2023-08-26 17:54:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:09,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-26 17:54:09,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 357 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:09,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:09,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-26 17:54:09,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:09,481 INFO L124 PetriNetUnfolderBase]: 314/727 cut-off events. [2023-08-26 17:54:09,481 INFO L125 PetriNetUnfolderBase]: For 677/677 co-relation queries the response was YES. [2023-08-26 17:54:09,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 727 events. 314/727 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3624 event pairs, 43 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 2269. Up to 556 conditions per place. [2023-08-26 17:54:09,485 INFO L140 encePairwiseOnDemand]: 322/327 looper letters, 40 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2023-08-26 17:54:09,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 479 flow [2023-08-26 17:54:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-26 17:54:09,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30275229357798167 [2023-08-26 17:54:09,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-26 17:54:09,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-26 17:54:09,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:09,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-26 17:54:09,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 17:54:09,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:09,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:09,491 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 357 flow. Second operand 3 states and 297 transitions. [2023-08-26 17:54:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 479 flow [2023-08-26 17:54:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 465 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-26 17:54:09,494 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 371 flow [2023-08-26 17:54:09,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=371, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-26 17:54:09,495 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -3 predicate places. [2023-08-26 17:54:09,495 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 371 flow [2023-08-26 17:54:09,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:09,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:09,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:09,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 17:54:09,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:09,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1038460844, now seen corresponding path program 1 times [2023-08-26 17:54:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:09,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781580503] [2023-08-26 17:54:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:09,565 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 17:54:09,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:09,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781580503] [2023-08-26 17:54:09,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781580503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:09,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:54:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765246075] [2023-08-26 17:54:09,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:09,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 327 [2023-08-26 17:54:09,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 17:54:09,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:09,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 327 [2023-08-26 17:54:09,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:09,668 INFO L124 PetriNetUnfolderBase]: 272/616 cut-off events. [2023-08-26 17:54:09,668 INFO L125 PetriNetUnfolderBase]: For 862/862 co-relation queries the response was YES. [2023-08-26 17:54:09,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 616 events. 272/616 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2832 event pairs, 43 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 2060. Up to 445 conditions per place. [2023-08-26 17:54:09,672 INFO L140 encePairwiseOnDemand]: 321/327 looper letters, 37 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2023-08-26 17:54:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 485 flow [2023-08-26 17:54:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-26 17:54:09,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2945973496432212 [2023-08-26 17:54:09,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-26 17:54:09,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-26 17:54:09,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:09,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-26 17:54:09,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 17:54:09,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:09,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 17:54:09,677 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 371 flow. Second operand 3 states and 289 transitions. [2023-08-26 17:54:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 485 flow [2023-08-26 17:54:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:54:09,681 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 365 flow [2023-08-26 17:54:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 17:54:09,681 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -6 predicate places. [2023-08-26 17:54:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 365 flow [2023-08-26 17:54:09,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 17:54:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:09,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 17:54:09,682 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:09,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 138545289, now seen corresponding path program 1 times [2023-08-26 17:54:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:09,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952141176] [2023-08-26 17:54:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:09,784 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 17:54:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952141176] [2023-08-26 17:54:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952141176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:09,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:54:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055394897] [2023-08-26 17:54:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:09,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:54:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:54:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:54:09,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 327 [2023-08-26 17:54:09,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 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 17:54:09,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:09,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 327 [2023-08-26 17:54:09,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:09,885 INFO L124 PetriNetUnfolderBase]: 251/557 cut-off events. [2023-08-26 17:54:09,885 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-08-26 17:54:09,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1900 conditions, 557 events. 251/557 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2415 event pairs, 34 based on Foata normal form. 35/503 useless extension candidates. Maximal degree in co-relation 1873. Up to 413 conditions per place. [2023-08-26 17:54:09,888 INFO L140 encePairwiseOnDemand]: 321/327 looper letters, 34 selfloop transitions, 17 changer transitions 0/52 dead transitions. [2023-08-26 17:54:09,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 471 flow [2023-08-26 17:54:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:54:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:54:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-08-26 17:54:09,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2714067278287462 [2023-08-26 17:54:09,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-08-26 17:54:09,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-08-26 17:54:09,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:09,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-08-26 17:54:09,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 17:54:09,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:09,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:09,894 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 365 flow. Second operand 4 states and 355 transitions. [2023-08-26 17:54:09,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 471 flow [2023-08-26 17:54:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 17:54:09,897 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 348 flow [2023-08-26 17:54:09,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-26 17:54:09,898 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2023-08-26 17:54:09,898 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 348 flow [2023-08-26 17:54:09,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 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 17:54:09,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:09,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:09,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 17:54:09,898 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err38ASSERT_VIOLATIONASSERT === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:09,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash 138545291, now seen corresponding path program 1 times [2023-08-26 17:54:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092439407] [2023-08-26 17:54:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:10,166 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 17:54:10,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092439407] [2023-08-26 17:54:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092439407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:10,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:54:10,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542120095] [2023-08-26 17:54:10,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:10,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:54:10,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:54:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:54:10,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 327 [2023-08-26 17:54:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:10,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:10,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 327 [2023-08-26 17:54:10,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:10,407 INFO L124 PetriNetUnfolderBase]: 259/638 cut-off events. [2023-08-26 17:54:10,407 INFO L125 PetriNetUnfolderBase]: For 873/873 co-relation queries the response was YES. [2023-08-26 17:54:10,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 638 events. 259/638 cut-off events. For 873/873 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3064 event pairs, 27 based on Foata normal form. 12/553 useless extension candidates. Maximal degree in co-relation 2040. Up to 254 conditions per place. [2023-08-26 17:54:10,412 INFO L140 encePairwiseOnDemand]: 316/327 looper letters, 52 selfloop transitions, 30 changer transitions 0/83 dead transitions. [2023-08-26 17:54:10,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 679 flow [2023-08-26 17:54:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:54:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:54:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 508 transitions. [2023-08-26 17:54:10,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2219309742245522 [2023-08-26 17:54:10,415 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 508 transitions. [2023-08-26 17:54:10,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 508 transitions. [2023-08-26 17:54:10,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:10,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 508 transitions. [2023-08-26 17:54:10,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.57142857142857) internal successors, (508), 7 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 17:54:10,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 17:54:10,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 17:54:10,420 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 348 flow. Second operand 7 states and 508 transitions. [2023-08-26 17:54:10,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 679 flow [2023-08-26 17:54:10,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 629 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:54:10,425 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 531 flow [2023-08-26 17:54:10,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2023-08-26 17:54:10,425 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -4 predicate places. [2023-08-26 17:54:10,425 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 531 flow [2023-08-26 17:54:10,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:10,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:10,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 17:54:10,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:10,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:10,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1364043570, now seen corresponding path program 1 times [2023-08-26 17:54:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:10,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685663006] [2023-08-26 17:54:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:10,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:10,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:10,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685663006] [2023-08-26 17:54:10,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685663006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:10,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:10,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:54:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351864189] [2023-08-26 17:54:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:54:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:54:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:54:10,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 327 [2023-08-26 17:54:10,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 531 flow. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 17:54:10,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:10,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 327 [2023-08-26 17:54:10,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:10,622 INFO L124 PetriNetUnfolderBase]: 193/519 cut-off events. [2023-08-26 17:54:10,622 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2023-08-26 17:54:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 519 events. 193/519 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2380 event pairs, 34 based on Foata normal form. 54/537 useless extension candidates. Maximal degree in co-relation 1924. Up to 385 conditions per place. [2023-08-26 17:54:10,625 INFO L140 encePairwiseOnDemand]: 322/327 looper letters, 45 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-08-26 17:54:10,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 681 flow [2023-08-26 17:54:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:54:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:54:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-26 17:54:10,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27293577981651373 [2023-08-26 17:54:10,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-26 17:54:10,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-26 17:54:10,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:10,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-26 17:54:10,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 17:54:10,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:10,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 17:54:10,631 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 531 flow. Second operand 4 states and 357 transitions. [2023-08-26 17:54:10,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 681 flow [2023-08-26 17:54:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 71 transitions, 677 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-26 17:54:10,635 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 573 flow [2023-08-26 17:54:10,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=573, PETRI_PLACES=62, PETRI_TRANSITIONS=68} [2023-08-26 17:54:10,636 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2023-08-26 17:54:10,636 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 573 flow [2023-08-26 17:54:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 17:54:10,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:10,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:10,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 17:54:10,636 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err38ASSERT_VIOLATIONASSERT === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:54:10,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash 664288759, now seen corresponding path program 1 times [2023-08-26 17:54:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054576577] [2023-08-26 17:54:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054576577] [2023-08-26 17:54:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054576577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:54:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625026701] [2023-08-26 17:54:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:54:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:54:11,045 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 17:54:11,046 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 17:54:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:11,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 17:54:11,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:54:11,306 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 17:54:11,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 17:54:11,401 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 17:54:11,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 17:54:11,708 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 17:54:11,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 191 [2023-08-26 17:54:11,729 INFO L322 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-26 17:54:11,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 201 [2023-08-26 17:54:11,745 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-26 17:54:11,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 156 [2023-08-26 17:54:11,758 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-26 17:54:11,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2023-08-26 17:54:11,811 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:54:11,812 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2023-08-26 17:54:11,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:54:11,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-26 17:54:11,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-26 17:54:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:11,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:54:11,907 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_308 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_308) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-26 17:54:12,046 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-26 17:54:12,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 192 [2023-08-26 17:54:12,060 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:54:12,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 193 [2023-08-26 17:54:12,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:54:12,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-26 17:54:12,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-08-26 17:54:12,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-08-26 17:54:12,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-08-26 17:54:12,387 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:54:12,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2023-08-26 17:54:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 17:54:12,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625026701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:54:12,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:54:12,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-26 17:54:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058005280] [2023-08-26 17:54:12,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:54:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 17:54:12,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 17:54:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=427, Unknown=1, NotChecked=42, Total=552 [2023-08-26 17:54:12,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 327 [2023-08-26 17:54:12,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 573 flow. Second operand has 24 states, 24 states have (on average 55.25) internal successors, (1326), 24 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 17:54:12,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:12,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 327 [2023-08-26 17:54:12,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:14,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:54:23,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:54:25,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:54:27,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:54:39,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:54:41,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:54:47,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:54:53,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:54:57,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:54:59,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:01,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:09,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:15,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:25,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:27,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:36,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:38,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:40,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:42,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-26 17:55:44,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:46,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:48,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:50,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:52,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 17:55:53,613 INFO L124 PetriNetUnfolderBase]: 379/1084 cut-off events. [2023-08-26 17:55:53,614 INFO L125 PetriNetUnfolderBase]: For 2534/2534 co-relation queries the response was YES. [2023-08-26 17:55:53,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 1084 events. 379/1084 cut-off events. For 2534/2534 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5913 event pairs, 21 based on Foata normal form. 20/1017 useless extension candidates. Maximal degree in co-relation 4062. Up to 230 conditions per place. [2023-08-26 17:55:53,620 INFO L140 encePairwiseOnDemand]: 309/327 looper letters, 148 selfloop transitions, 146 changer transitions 0/295 dead transitions. [2023-08-26 17:55:53,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 295 transitions, 2588 flow [2023-08-26 17:55:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-26 17:55:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-26 17:55:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2614 transitions. [2023-08-26 17:55:53,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17764186204553176 [2023-08-26 17:55:53,633 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2614 transitions. [2023-08-26 17:55:53,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2614 transitions. [2023-08-26 17:55:53,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:53,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2614 transitions. [2023-08-26 17:55:53,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 58.08888888888889) internal successors, (2614), 45 states have internal predecessors, (2614), 0 states have call successors, (0), 0 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 17:55:53,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 327.0) internal successors, (15042), 46 states have internal predecessors, (15042), 0 states have call successors, (0), 0 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 17:55:53,666 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 327.0) internal successors, (15042), 46 states have internal predecessors, (15042), 0 states have call successors, (0), 0 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 17:55:53,666 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 573 flow. Second operand 45 states and 2614 transitions. [2023-08-26 17:55:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 295 transitions, 2588 flow [2023-08-26 17:55:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 295 transitions, 2452 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:55:53,677 INFO L231 Difference]: Finished difference. Result has 115 places, 192 transitions, 1998 flow [2023-08-26 17:55:53,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1998, PETRI_PLACES=115, PETRI_TRANSITIONS=192} [2023-08-26 17:55:53,678 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 51 predicate places. [2023-08-26 17:55:53,678 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 192 transitions, 1998 flow [2023-08-26 17:55:53,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.25) internal successors, (1326), 24 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 17:55:53,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:53,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:53,690 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 17:55:53,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:53,891 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:55:53,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash -59824356, now seen corresponding path program 1 times [2023-08-26 17:55:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308937515] [2023-08-26 17:55:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:55:54,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308937515] [2023-08-26 17:55:54,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308937515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474404863] [2023-08-26 17:55:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:54,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:54,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:55:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 17:55:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:54,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-26 17:55:54,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:54,282 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 17:55:54,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 17:55:54,321 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 17:55:54,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 17:55:54,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 17:55:54,447 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 17:55:54,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 17:55:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:54,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:54,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-26 17:55:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474404863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-26 17:55:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678237521] [2023-08-26 17:55:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:54,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:55:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:55:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:55:54,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 327 [2023-08-26 17:55:54,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 192 transitions, 1998 flow. Second operand has 16 states, 16 states have (on average 64.0625) internal successors, (1025), 16 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 17:55:54,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:54,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 327 [2023-08-26 17:55:54,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:54,986 INFO L124 PetriNetUnfolderBase]: 366/1041 cut-off events. [2023-08-26 17:55:54,986 INFO L125 PetriNetUnfolderBase]: For 4148/4148 co-relation queries the response was YES. [2023-08-26 17:55:54,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1041 events. 366/1041 cut-off events. For 4148/4148 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5625 event pairs, 53 based on Foata normal form. 28/1041 useless extension candidates. Maximal degree in co-relation 5155. Up to 711 conditions per place. [2023-08-26 17:55:54,994 INFO L140 encePairwiseOnDemand]: 320/327 looper letters, 129 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2023-08-26 17:55:54,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 200 transitions, 2427 flow [2023-08-26 17:55:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:55:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:55:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 597 transitions. [2023-08-26 17:55:54,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20285423037716616 [2023-08-26 17:55:54,998 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 597 transitions. [2023-08-26 17:55:54,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 597 transitions. [2023-08-26 17:55:54,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:54,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 597 transitions. [2023-08-26 17:55:55,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.33333333333333) internal successors, (597), 9 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 17:55:55,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 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 17:55:55,018 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 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 17:55:55,018 INFO L175 Difference]: Start difference. First operand has 115 places, 192 transitions, 1998 flow. Second operand 9 states and 597 transitions. [2023-08-26 17:55:55,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 200 transitions, 2427 flow [2023-08-26 17:55:55,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 200 transitions, 2261 flow, removed 40 selfloop flow, removed 10 redundant places. [2023-08-26 17:55:55,043 INFO L231 Difference]: Finished difference. Result has 111 places, 186 transitions, 1917 flow [2023-08-26 17:55:55,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1917, PETRI_PLACES=111, PETRI_TRANSITIONS=186} [2023-08-26 17:55:55,043 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 47 predicate places. [2023-08-26 17:55:55,043 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 186 transitions, 1917 flow [2023-08-26 17:55:55,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.0625) internal successors, (1025), 16 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 17:55:55,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:55,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:55,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-26 17:55:55,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:55:55,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1656571933, now seen corresponding path program 1 times [2023-08-26 17:55:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296421630] [2023-08-26 17:55:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:55,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296421630] [2023-08-26 17:55:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296421630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619711591] [2023-08-26 17:55:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:55,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:55,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:55:55,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 17:55:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:55,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 17:55:55,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:55,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:55,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619711591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:55,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:55,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-26 17:55:55,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462219664] [2023-08-26 17:55:55,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:55,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 17:55:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 17:55:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-26 17:55:55,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:55:55,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 186 transitions, 1917 flow. Second operand has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 17:55:55,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:55:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:56,391 INFO L124 PetriNetUnfolderBase]: 580/1653 cut-off events. [2023-08-26 17:55:56,392 INFO L125 PetriNetUnfolderBase]: For 6967/6967 co-relation queries the response was YES. [2023-08-26 17:55:56,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8024 conditions, 1653 events. 580/1653 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10036 event pairs, 67 based on Foata normal form. 28/1600 useless extension candidates. Maximal degree in co-relation 7987. Up to 335 conditions per place. [2023-08-26 17:55:56,413 INFO L140 encePairwiseOnDemand]: 317/327 looper letters, 280 selfloop transitions, 69 changer transitions 4/354 dead transitions. [2023-08-26 17:55:56,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 354 transitions, 4048 flow [2023-08-26 17:55:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 17:55:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 17:55:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2159 transitions. [2023-08-26 17:55:56,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30011120378092854 [2023-08-26 17:55:56,434 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2159 transitions. [2023-08-26 17:55:56,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2159 transitions. [2023-08-26 17:55:56,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:56,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2159 transitions. [2023-08-26 17:55:56,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 98.13636363636364) internal successors, (2159), 22 states have internal predecessors, (2159), 0 states have call successors, (0), 0 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 17:55:56,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 327.0) internal successors, (7521), 23 states have internal predecessors, (7521), 0 states have call successors, (0), 0 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 17:55:56,449 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 327.0) internal successors, (7521), 23 states have internal predecessors, (7521), 0 states have call successors, (0), 0 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 17:55:56,449 INFO L175 Difference]: Start difference. First operand has 111 places, 186 transitions, 1917 flow. Second operand 22 states and 2159 transitions. [2023-08-26 17:55:56,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 354 transitions, 4048 flow [2023-08-26 17:55:56,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 354 transitions, 3709 flow, removed 88 selfloop flow, removed 12 redundant places. [2023-08-26 17:55:56,475 INFO L231 Difference]: Finished difference. Result has 117 places, 180 transitions, 1831 flow [2023-08-26 17:55:56,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1831, PETRI_PLACES=117, PETRI_TRANSITIONS=180} [2023-08-26 17:55:56,476 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 53 predicate places. [2023-08-26 17:55:56,476 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 180 transitions, 1831 flow [2023-08-26 17:55:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 17:55:56,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:56,476 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:56,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:56,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:56,683 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:55:56,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash -926206039, now seen corresponding path program 1 times [2023-08-26 17:55:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:56,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918059785] [2023-08-26 17:55:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918059785] [2023-08-26 17:55:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918059785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40900142] [2023-08-26 17:55:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:56,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:56,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:55:56,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 17:55:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:57,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 17:55:57,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:57,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40900142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:57,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-26 17:55:57,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791483167] [2023-08-26 17:55:57,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:57,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:55:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:55:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-26 17:55:57,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:55:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 180 transitions, 1831 flow. Second operand has 13 states, 13 states have (on average 96.15384615384616) internal successors, (1250), 13 states have internal predecessors, (1250), 0 states have call successors, (0), 0 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 17:55:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:55:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:58,390 INFO L124 PetriNetUnfolderBase]: 762/2116 cut-off events. [2023-08-26 17:55:58,390 INFO L125 PetriNetUnfolderBase]: For 8018/8018 co-relation queries the response was YES. [2023-08-26 17:55:58,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9929 conditions, 2116 events. 762/2116 cut-off events. For 8018/8018 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 12608 event pairs, 94 based on Foata normal form. 53/2125 useless extension candidates. Maximal degree in co-relation 9892. Up to 453 conditions per place. [2023-08-26 17:55:58,406 INFO L140 encePairwiseOnDemand]: 318/327 looper letters, 380 selfloop transitions, 63 changer transitions 1/445 dead transitions. [2023-08-26 17:55:58,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 445 transitions, 4992 flow [2023-08-26 17:55:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 17:55:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 17:55:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2104 transitions. [2023-08-26 17:55:58,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30639289354885685 [2023-08-26 17:55:58,411 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2104 transitions. [2023-08-26 17:55:58,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2104 transitions. [2023-08-26 17:55:58,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:58,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2104 transitions. [2023-08-26 17:55:58,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 100.19047619047619) internal successors, (2104), 21 states have internal predecessors, (2104), 0 states have call successors, (0), 0 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 17:55:58,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 327.0) internal successors, (7194), 22 states have internal predecessors, (7194), 0 states have call successors, (0), 0 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 17:55:58,424 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 327.0) internal successors, (7194), 22 states have internal predecessors, (7194), 0 states have call successors, (0), 0 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 17:55:58,424 INFO L175 Difference]: Start difference. First operand has 117 places, 180 transitions, 1831 flow. Second operand 21 states and 2104 transitions. [2023-08-26 17:55:58,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 445 transitions, 4992 flow [2023-08-26 17:55:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 445 transitions, 4768 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-08-26 17:55:58,455 INFO L231 Difference]: Finished difference. Result has 133 places, 188 transitions, 1940 flow [2023-08-26 17:55:58,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1940, PETRI_PLACES=133, PETRI_TRANSITIONS=188} [2023-08-26 17:55:58,456 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 69 predicate places. [2023-08-26 17:55:58,456 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 188 transitions, 1940 flow [2023-08-26 17:55:58,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.15384615384616) internal successors, (1250), 13 states have internal predecessors, (1250), 0 states have call successors, (0), 0 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 17:55:58,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:58,457 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:58,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:58,664 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:55:58,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash -337527010, now seen corresponding path program 1 times [2023-08-26 17:55:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293104671] [2023-08-26 17:55:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:58,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293104671] [2023-08-26 17:55:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293104671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789231669] [2023-08-26 17:55:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:58,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:58,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:58,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:55:58,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 17:55:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:59,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 17:55:59,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:59,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789231669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 17:55:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686949275] [2023-08-26 17:55:59,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 17:55:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 17:55:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-26 17:55:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:55:59,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 188 transitions, 1940 flow. Second operand has 14 states, 14 states have (on average 97.85714285714286) internal successors, (1370), 14 states have internal predecessors, (1370), 0 states have call successors, (0), 0 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 17:55:59,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:59,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:55:59,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:59,872 INFO L124 PetriNetUnfolderBase]: 668/1909 cut-off events. [2023-08-26 17:55:59,872 INFO L125 PetriNetUnfolderBase]: For 6898/6898 co-relation queries the response was YES. [2023-08-26 17:55:59,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8895 conditions, 1909 events. 668/1909 cut-off events. For 6898/6898 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 9900 event pairs, 90 based on Foata normal form. 32/1941 useless extension candidates. Maximal degree in co-relation 8853. Up to 748 conditions per place. [2023-08-26 17:55:59,885 INFO L140 encePairwiseOnDemand]: 321/327 looper letters, 189 selfloop transitions, 43 changer transitions 0/233 dead transitions. [2023-08-26 17:55:59,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 233 transitions, 2508 flow [2023-08-26 17:55:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:55:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:55:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1275 transitions. [2023-08-26 17:55:59,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29992942836979536 [2023-08-26 17:55:59,888 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1275 transitions. [2023-08-26 17:55:59,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1275 transitions. [2023-08-26 17:55:59,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:59,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1275 transitions. [2023-08-26 17:55:59,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 98.07692307692308) internal successors, (1275), 13 states have internal predecessors, (1275), 0 states have call successors, (0), 0 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 17:55:59,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 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 17:55:59,894 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 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 17:55:59,894 INFO L175 Difference]: Start difference. First operand has 133 places, 188 transitions, 1940 flow. Second operand 13 states and 1275 transitions. [2023-08-26 17:55:59,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 233 transitions, 2508 flow [2023-08-26 17:55:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 2440 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-08-26 17:55:59,921 INFO L231 Difference]: Finished difference. Result has 134 places, 169 transitions, 1687 flow [2023-08-26 17:55:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1687, PETRI_PLACES=134, PETRI_TRANSITIONS=169} [2023-08-26 17:55:59,921 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 70 predicate places. [2023-08-26 17:55:59,922 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 169 transitions, 1687 flow [2023-08-26 17:55:59,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.85714285714286) internal successors, (1370), 14 states have internal predecessors, (1370), 0 states have call successors, (0), 0 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 17:55:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:59,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 17:56:00,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 17:56:00,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:56:00,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:56:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1930230943, now seen corresponding path program 2 times [2023-08-26 17:56:00,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:56:00,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108664123] [2023-08-26 17:56:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:56:00,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:56:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:56:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:00,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:56:00,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108664123] [2023-08-26 17:56:00,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108664123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:56:00,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669350308] [2023-08-26 17:56:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:56:00,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:56:00,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:56:00,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:56:00,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 17:56:00,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:56:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:56:00,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 17:56:00,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:56:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 72 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:00,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:56:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669350308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:56:00,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:56:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-26 17:56:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674115497] [2023-08-26 17:56:00,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:56:00,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 17:56:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:56:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 17:56:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-08-26 17:56:00,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:56:00,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 169 transitions, 1687 flow. Second operand has 23 states, 23 states have (on average 97.65217391304348) internal successors, (2246), 23 states have internal predecessors, (2246), 0 states have call successors, (0), 0 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 17:56:00,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:56:00,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:56:00,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:56:01,887 INFO L124 PetriNetUnfolderBase]: 454/1330 cut-off events. [2023-08-26 17:56:01,888 INFO L125 PetriNetUnfolderBase]: For 5254/5254 co-relation queries the response was YES. [2023-08-26 17:56:01,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6275 conditions, 1330 events. 454/1330 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6192 event pairs, 49 based on Foata normal form. 28/1358 useless extension candidates. Maximal degree in co-relation 6231. Up to 286 conditions per place. [2023-08-26 17:56:01,898 INFO L140 encePairwiseOnDemand]: 320/327 looper letters, 229 selfloop transitions, 45 changer transitions 6/281 dead transitions. [2023-08-26 17:56:01,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 281 transitions, 2997 flow [2023-08-26 17:56:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 17:56:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 17:56:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2138 transitions. [2023-08-26 17:56:01,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971921045315541 [2023-08-26 17:56:01,901 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2138 transitions. [2023-08-26 17:56:01,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2138 transitions. [2023-08-26 17:56:01,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:56:01,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2138 transitions. [2023-08-26 17:56:01,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 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 17:56:01,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 327.0) internal successors, (7521), 23 states have internal predecessors, (7521), 0 states have call successors, (0), 0 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 17:56:01,910 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 327.0) internal successors, (7521), 23 states have internal predecessors, (7521), 0 states have call successors, (0), 0 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 17:56:01,910 INFO L175 Difference]: Start difference. First operand has 134 places, 169 transitions, 1687 flow. Second operand 22 states and 2138 transitions. [2023-08-26 17:56:01,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 281 transitions, 2997 flow [2023-08-26 17:56:01,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 281 transitions, 2943 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-26 17:56:01,932 INFO L231 Difference]: Finished difference. Result has 142 places, 156 transitions, 1588 flow [2023-08-26 17:56:01,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1588, PETRI_PLACES=142, PETRI_TRANSITIONS=156} [2023-08-26 17:56:01,934 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 78 predicate places. [2023-08-26 17:56:01,934 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 156 transitions, 1588 flow [2023-08-26 17:56:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.65217391304348) internal successors, (2246), 23 states have internal predecessors, (2246), 0 states have call successors, (0), 0 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 17:56:01,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:56:01,935 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:56:01,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 17:56:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:56:02,142 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:56:02,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:56:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1035113217, now seen corresponding path program 2 times [2023-08-26 17:56:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:56:02,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440816835] [2023-08-26 17:56:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:56:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:56:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:56:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:56:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440816835] [2023-08-26 17:56:02,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440816835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:56:02,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647743876] [2023-08-26 17:56:02,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:56:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:56:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:56:02,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:56:02,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 17:56:02,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:56:02,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:56:02,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:56:02,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:56:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:03,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:56:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:03,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647743876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:56:03,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:56:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-26 17:56:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352929418] [2023-08-26 17:56:03,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:56:03,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:56:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:56:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:56:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:56:03,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:56:03,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 156 transitions, 1588 flow. Second operand has 21 states, 21 states have (on average 98.0) internal successors, (2058), 21 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 17:56:03,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:56:03,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:56:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:56:07,475 INFO L124 PetriNetUnfolderBase]: 1304/3751 cut-off events. [2023-08-26 17:56:07,475 INFO L125 PetriNetUnfolderBase]: For 18092/18092 co-relation queries the response was YES. [2023-08-26 17:56:07,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18403 conditions, 3751 events. 1304/3751 cut-off events. For 18092/18092 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 19383 event pairs, 173 based on Foata normal form. 68/3819 useless extension candidates. Maximal degree in co-relation 18360. Up to 794 conditions per place. [2023-08-26 17:56:07,497 INFO L140 encePairwiseOnDemand]: 319/327 looper letters, 734 selfloop transitions, 76 changer transitions 2/813 dead transitions. [2023-08-26 17:56:07,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 813 transitions, 9388 flow [2023-08-26 17:56:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 17:56:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 17:56:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3719 transitions. [2023-08-26 17:56:07,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3073807752706835 [2023-08-26 17:56:07,503 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3719 transitions. [2023-08-26 17:56:07,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3719 transitions. [2023-08-26 17:56:07,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:56:07,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3719 transitions. [2023-08-26 17:56:07,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 100.51351351351352) internal successors, (3719), 37 states have internal predecessors, (3719), 0 states have call successors, (0), 0 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 17:56:07,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 327.0) internal successors, (12426), 38 states have internal predecessors, (12426), 0 states have call successors, (0), 0 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 17:56:07,517 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 327.0) internal successors, (12426), 38 states have internal predecessors, (12426), 0 states have call successors, (0), 0 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 17:56:07,517 INFO L175 Difference]: Start difference. First operand has 142 places, 156 transitions, 1588 flow. Second operand 37 states and 3719 transitions. [2023-08-26 17:56:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 813 transitions, 9388 flow [2023-08-26 17:56:07,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 813 transitions, 8958 flow, removed 22 selfloop flow, removed 20 redundant places. [2023-08-26 17:56:07,573 INFO L231 Difference]: Finished difference. Result has 169 places, 196 transitions, 2169 flow [2023-08-26 17:56:07,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2169, PETRI_PLACES=169, PETRI_TRANSITIONS=196} [2023-08-26 17:56:07,574 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 105 predicate places. [2023-08-26 17:56:07,574 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 196 transitions, 2169 flow [2023-08-26 17:56:07,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.0) internal successors, (2058), 21 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 17:56:07,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:56:07,575 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:56:07,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 17:56:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:56:07,782 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:56:07,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:56:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 539009457, now seen corresponding path program 3 times [2023-08-26 17:56:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:56:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651537735] [2023-08-26 17:56:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:56:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:56:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:56:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:09,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:56:09,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651537735] [2023-08-26 17:56:09,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651537735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:56:09,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397069579] [2023-08-26 17:56:09,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:56:09,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:56:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:56:09,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:56:09,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 17:56:22,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-08-26 17:56:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:56:22,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 2033 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-26 17:56:22,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:56:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:23,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:56:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:56:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397069579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:56:24,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:56:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 35 [2023-08-26 17:56:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881194185] [2023-08-26 17:56:24,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:56:24,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-26 17:56:24,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:56:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-26 17:56:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2023-08-26 17:56:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:56:24,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 196 transitions, 2169 flow. Second operand has 37 states, 37 states have (on average 99.29729729729729) internal successors, (3674), 37 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 17:56:24,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:56:24,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:56:24,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:57:07,951 INFO L124 PetriNetUnfolderBase]: 2604/7507 cut-off events. [2023-08-26 17:57:07,951 INFO L125 PetriNetUnfolderBase]: For 47154/47154 co-relation queries the response was YES. [2023-08-26 17:57:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37240 conditions, 7507 events. 2604/7507 cut-off events. For 47154/47154 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 38814 event pairs, 341 based on Foata normal form. 156/7663 useless extension candidates. Maximal degree in co-relation 37184. Up to 1600 conditions per place. [2023-08-26 17:57:08,003 INFO L140 encePairwiseOnDemand]: 319/327 looper letters, 1462 selfloop transitions, 140 changer transitions 8/1611 dead transitions. [2023-08-26 17:57:08,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1611 transitions, 18894 flow [2023-08-26 17:57:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-26 17:57:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-26 17:57:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6979 transitions. [2023-08-26 17:57:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30931170500376726 [2023-08-26 17:57:08,018 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6979 transitions. [2023-08-26 17:57:08,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6979 transitions. [2023-08-26 17:57:08,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:57:08,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6979 transitions. [2023-08-26 17:57:08,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 101.14492753623189) internal successors, (6979), 69 states have internal predecessors, (6979), 0 states have call successors, (0), 0 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 17:57:08,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 327.0) internal successors, (22890), 70 states have internal predecessors, (22890), 0 states have call successors, (0), 0 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 17:57:08,051 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 327.0) internal successors, (22890), 70 states have internal predecessors, (22890), 0 states have call successors, (0), 0 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 17:57:08,051 INFO L175 Difference]: Start difference. First operand has 169 places, 196 transitions, 2169 flow. Second operand 69 states and 6979 transitions. [2023-08-26 17:57:08,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1611 transitions, 18894 flow [2023-08-26 17:57:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1611 transitions, 18469 flow, removed 69 selfloop flow, removed 19 redundant places. [2023-08-26 17:57:08,227 INFO L231 Difference]: Finished difference. Result has 246 places, 264 transitions, 3483 flow [2023-08-26 17:57:08,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=3483, PETRI_PLACES=246, PETRI_TRANSITIONS=264} [2023-08-26 17:57:08,228 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 182 predicate places. [2023-08-26 17:57:08,228 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 264 transitions, 3483 flow [2023-08-26 17:57:08,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 99.29729729729729) internal successors, (3674), 37 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 17:57:08,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:57:08,229 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:57:08,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 17:57:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 17:57:08,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-26 17:57:08,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:57:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 941235985, now seen corresponding path program 4 times [2023-08-26 17:57:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:57:08,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612339460] [2023-08-26 17:57:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:57:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:57:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:57:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:57:12,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:57:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612339460] [2023-08-26 17:57:12,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612339460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:57:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914781705] [2023-08-26 17:57:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:57:12,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:57:12,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:57:12,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:57:12,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 17:57:21,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:57:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:57:21,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 4081 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-26 17:57:21,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:57:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:57:22,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:57:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:57:24,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914781705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:57:24,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:57:24,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2023-08-26 17:57:24,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94014104] [2023-08-26 17:57:24,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:57:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-26 17:57:24,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:57:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-26 17:57:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=3592, Unknown=0, NotChecked=0, Total=4692 [2023-08-26 17:57:24,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 327 [2023-08-26 17:57:24,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 264 transitions, 3483 flow. Second operand has 69 states, 69 states have (on average 100.08695652173913) internal successors, (6906), 69 states have internal predecessors, (6906), 0 states have call successors, (0), 0 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 17:57:24,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:57:24,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 327 [2023-08-26 17:57:24,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 18:08:13,388 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 18:08:13,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 18:08:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-26 18:08:13,404 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (79 of 80 remaining) [2023-08-26 18:08:13,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 18:08:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 18:08:13,605 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. [2023-08-26 18:08:13,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 80 remaining) [2023-08-26 18:08:13,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 80 remaining) [2023-08-26 18:08:13,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 80 remaining) [2023-08-26 18:08:13,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 80 remaining) [2023-08-26 18:08:13,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (74 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err38ASSERT_VIOLATIONASSERT (70 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 80 remaining) [2023-08-26 18:08:13,608 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err38ASSERT_VIOLATIONASSERT (60 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 80 remaining) [2023-08-26 18:08:13,609 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (50 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 80 remaining) [2023-08-26 18:08:13,610 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 80 remaining) [2023-08-26 18:08:13,611 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 80 remaining) [2023-08-26 18:08:13,612 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 80 remaining) [2023-08-26 18:08:13,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 80 remaining) [2023-08-26 18:08:13,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (0 of 80 remaining) [2023-08-26 18:08:13,615 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:08:13,616 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT (1/2) [2023-08-26 18:08:13,620 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:08:13,620 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:08:13,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:08:13 BasicIcfg [2023-08-26 18:08:13,622 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:08:13,623 INFO L158 Benchmark]: Toolchain (without parser) took 855839.53ms. Allocated memory was 346.0MB in the beginning and 721.4MB in the end (delta: 375.4MB). Free memory was 320.8MB in the beginning and 375.7MB in the end (delta: -54.9MB). Peak memory consumption was 594.8MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,623 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 346.0MB. Free memory was 322.8MB in the beginning and 322.7MB in the end (delta: 125.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 452.38ms. Allocated memory is still 346.0MB. Free memory was 320.8MB in the beginning and 300.4MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,623 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.70ms. Allocated memory is still 346.0MB. Free memory was 300.4MB in the beginning and 297.8MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,624 INFO L158 Benchmark]: Boogie Preprocessor took 56.75ms. Allocated memory is still 346.0MB. Free memory was 297.8MB in the beginning and 295.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,624 INFO L158 Benchmark]: RCFGBuilder took 667.72ms. Allocated memory was 346.0MB in the beginning and 415.2MB in the end (delta: 69.2MB). Free memory was 295.7MB in the beginning and 389.4MB in the end (delta: -93.7MB). Peak memory consumption was 68.9MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,624 INFO L158 Benchmark]: TraceAbstraction took 854597.42ms. Allocated memory was 415.2MB in the beginning and 721.4MB in the end (delta: 306.2MB). Free memory was 388.8MB in the beginning and 375.7MB in the end (delta: 13.1MB). Peak memory consumption was 593.0MB. Max. memory is 16.0GB. [2023-08-26 18:08:13,625 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 346.0MB. Free memory was 322.8MB in the beginning and 322.7MB in the end (delta: 125.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 452.38ms. Allocated memory is still 346.0MB. Free memory was 320.8MB in the beginning and 300.4MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.70ms. Allocated memory is still 346.0MB. Free memory was 300.4MB in the beginning and 297.8MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 56.75ms. Allocated memory is still 346.0MB. Free memory was 297.8MB in the beginning and 295.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 667.72ms. Allocated memory was 346.0MB in the beginning and 415.2MB in the end (delta: 69.2MB). Free memory was 295.7MB in the beginning and 389.4MB in the end (delta: -93.7MB). Peak memory consumption was 68.9MB. Max. memory is 16.0GB. * TraceAbstraction took 854597.42ms. Allocated memory was 415.2MB in the beginning and 721.4MB in the end (delta: 306.2MB). Free memory was 388.8MB in the beginning and 375.7MB in the end (delta: 13.1MB). Peak memory consumption was 593.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.7s, 149 PlacesBefore, 64 PlacesAfterwards, 156 TransitionsBefore, 68 TransitionsAfterwards, 3540 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 129 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 3 ChoiceCompositions, 171 TotalNumberOfCompositions, 5664 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4174, independent: 3915, independent conditional: 0, independent unconditional: 3915, dependent: 259, dependent conditional: 0, dependent unconditional: 259, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1825, independent: 1754, independent conditional: 0, independent unconditional: 1754, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4174, independent: 2161, independent conditional: 0, independent unconditional: 2161, dependent: 188, dependent conditional: 0, dependent unconditional: 188, unknown: 1825, unknown conditional: 0, unknown unconditional: 1825] , Statistics on independence cache: Total cache size (in pairs): 173, Positive cache size: 142, Positive conditional cache size: 0, Positive unconditional cache size: 142, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 749]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: 17]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: 746]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 257 locations, 81 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: 854.4s, OverallIterations: 27, TraceHistogramMax: 31, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 805.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.8s, HoareTripleCheckerStatistics: 42 mSolverCounterUnknown, 10497 SdHoareTripleChecker+Valid, 62.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10497 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 60.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 210 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 559 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27011 IncrementalHoareTripleChecker+Invalid, 27822 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 559 mSolverCounterUnsat, 0 mSDtfsCounter, 27011 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1877 GetRequests, 1321 SyntacticMatches, 14 SemanticMatches, 541 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 10121 ImplicationChecksByTransitivity, 730.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3483occurred in iteration=26, InterpolantAutomatonStates: 307, 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: 0.5s SsaConstructionTime, 23.1s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 1615 NumberOfCodeBlocks, 1615 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2294 ConstructedInterpolants, 7 QuantifiedInterpolants, 15131 SizeOfPredicates, 67 NumberOfNonLiveVariables, 10043 ConjunctsInSsa, 249 ConjunctsInUnsatCore, 45 InterpolantComputations, 18 PerfectInterpolantSequences, 293/17669 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown