/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:17,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:17,719 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-NoLbe.epf [2023-12-05 21:17:17,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:17,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:17,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:17,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:17,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:17,748 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:17,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:17,751 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:17,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:17,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:17,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:17,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:17,753 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:17,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:17,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:17,754 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:17,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:17,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:17,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:17,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:17,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:17,756 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:17,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:17,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:17,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:17,757 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:17,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:17,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:17,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:17,977 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:17,977 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:17,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-12-05 21:17:19,116 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:19,274 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:19,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-12-05 21:17:19,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3d057e2c/f6ec8601ac6742bcb8a2694f53587ab7/FLAGdd9206c4b [2023-12-05 21:17:19,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3d057e2c/f6ec8601ac6742bcb8a2694f53587ab7 [2023-12-05 21:17:19,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:19,299 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:19,301 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:19,301 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:19,304 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:19,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ac2170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19, skipping insertion in model container [2023-12-05 21:17:19,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,359 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:19,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:19,753 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:19,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:19,843 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:19,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19 WrapperNode [2023-12-05 21:17:19,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:19,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:19,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:19,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:19,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,884 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 222 [2023-12-05 21:17:19,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:19,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:19,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:19,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:19,892 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:19,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:19,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:19,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:19,912 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (1/1) ... [2023-12-05 21:17:19,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:19,942 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) [2023-12-05 21:17:19,961 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 [2023-12-05 21:17:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:19,981 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:19,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:19,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:19,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:19,984 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:17:20,081 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:20,083 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:20,352 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:20,382 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:20,382 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-12-05 21:17:20,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:20 BoogieIcfgContainer [2023-12-05 21:17:20,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:20,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:20,385 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:20,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:20,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:19" (1/3) ... [2023-12-05 21:17:20,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116349e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:20, skipping insertion in model container [2023-12-05 21:17:20,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:19" (2/3) ... [2023-12-05 21:17:20,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116349e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:20, skipping insertion in model container [2023-12-05 21:17:20,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:20" (3/3) ... [2023-12-05 21:17:20,388 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-12-05 21:17:20,408 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:20,409 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-05 21:17:20,409 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:20,495 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:20,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:20,611 INFO L124 PetriNetUnfolderBase]: 48/337 cut-off events. [2023-12-05 21:17:20,612 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:20,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 337 events. 48/337 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1359 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-12-05 21:17:20,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:20,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:20,631 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:20,637 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1b28f66a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:20,637 INFO L363 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-05 21:17:20,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:20,658 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:20,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:20,659 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:20,659 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:20,660 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:20,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1791171730, now seen corresponding path program 1 times [2023-12-05 21:17:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697234046] [2023-12-05 21:17:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:20,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:20,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697234046] [2023-12-05 21:17:20,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697234046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:20,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:20,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188227365] [2023-12-05 21:17:20,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:20,960 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:20,991 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 240 [2023-12-05 21:17:20,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 240 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:20,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 240 [2023-12-05 21:17:20,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:21,185 INFO L124 PetriNetUnfolderBase]: 85/937 cut-off events. [2023-12-05 21:17:21,185 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-12-05 21:17:21,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 937 events. 85/937 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6326 event pairs, 72 based on Foata normal form. 209/973 useless extension candidates. Maximal degree in co-relation 968. Up to 181 conditions per place. [2023-12-05 21:17:21,194 INFO L140 encePairwiseOnDemand]: 208/240 looper letters, 29 selfloop transitions, 2 changer transitions 1/209 dead transitions. [2023-12-05 21:17:21,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 209 transitions, 487 flow [2023-12-05 21:17:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-12-05 21:17:21,209 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2023-12-05 21:17:21,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-12-05 21:17:21,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-12-05 21:17:21,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:21,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-12-05 21:17:21,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,227 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, -4 predicate places. [2023-12-05 21:17:21,227 INFO L500 AbstractCegarLoop]: Abstraction has has 206 places, 209 transitions, 487 flow [2023-12-05 21:17:21,228 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,228 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:21,228 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:21,228 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:21,229 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:21,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash -767972853, now seen corresponding path program 1 times [2023-12-05 21:17:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696261784] [2023-12-05 21:17:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:21,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696261784] [2023-12-05 21:17:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696261784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419542185] [2023-12-05 21:17:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:21,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:21,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:21,406 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) [2023-12-05 21:17:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:17:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:21,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:21,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:21,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:21,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419542185] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:21,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:21,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:21,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709839719] [2023-12-05 21:17:21,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:21,647 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:21,649 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:21,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 209 transitions, 487 flow. Second operand has 10 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:21,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:21,866 INFO L124 PetriNetUnfolderBase]: 85/944 cut-off events. [2023-12-05 21:17:21,866 INFO L125 PetriNetUnfolderBase]: For 102/106 co-relation queries the response was YES. [2023-12-05 21:17:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 944 events. 85/944 cut-off events. For 102/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6306 event pairs, 72 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 1129. Up to 186 conditions per place. [2023-12-05 21:17:21,872 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 30 selfloop transitions, 9 changer transitions 1/216 dead transitions. [2023-12-05 21:17:21,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 216 transitions, 589 flow [2023-12-05 21:17:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1670 transitions. [2023-12-05 21:17:21,875 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7731481481481481 [2023-12-05 21:17:21,875 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1670 transitions. [2023-12-05 21:17:21,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1670 transitions. [2023-12-05 21:17:21,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:21,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1670 transitions. [2023-12-05 21:17:21,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.55555555555554) internal successors, (1670), 9 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,883 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,884 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 4 predicate places. [2023-12-05 21:17:21,884 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 216 transitions, 589 flow [2023-12-05 21:17:21,885 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,885 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:21,885 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:21,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:17:22,092 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:22,093 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:22,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1565498389, now seen corresponding path program 2 times [2023-12-05 21:17:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798693003] [2023-12-05 21:17:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798693003] [2023-12-05 21:17:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798693003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:22,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859424972] [2023-12-05 21:17:22,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:22,196 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:22,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:22,197 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 240 [2023-12-05 21:17:22,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 216 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:22,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 240 [2023-12-05 21:17:22,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:22,503 INFO L124 PetriNetUnfolderBase]: 473/2074 cut-off events. [2023-12-05 21:17:22,503 INFO L125 PetriNetUnfolderBase]: For 939/947 co-relation queries the response was YES. [2023-12-05 21:17:22,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 2074 events. 473/2074 cut-off events. For 939/947 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17859 event pairs, 396 based on Foata normal form. 0/1734 useless extension candidates. Maximal degree in co-relation 3622. Up to 857 conditions per place. [2023-12-05 21:17:22,515 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 65 selfloop transitions, 2 changer transitions 4/232 dead transitions. [2023-12-05 21:17:22,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 232 transitions, 793 flow [2023-12-05 21:17:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-12-05 21:17:22,517 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7458333333333333 [2023-12-05 21:17:22,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-12-05 21:17:22,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-12-05 21:17:22,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:22,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-12-05 21:17:22,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,521 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 4 predicate places. [2023-12-05 21:17:22,522 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 793 flow [2023-12-05 21:17:22,523 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,523 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:22,523 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:22,523 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:22,523 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:22,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1565498388, now seen corresponding path program 1 times [2023-12-05 21:17:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:22,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938823944] [2023-12-05 21:17:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:22,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:22,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938823944] [2023-12-05 21:17:22,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938823944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:22,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281923490] [2023-12-05 21:17:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:22,697 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) [2023-12-05 21:17:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:17:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:22,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:22,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:22,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281923490] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:22,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:22,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:22,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756418417] [2023-12-05 21:17:22,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:22,909 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:22,913 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:22,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 793 flow. Second operand has 18 states, 18 states have (on average 183.27777777777777) internal successors, (3299), 18 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:22,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:22,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:22,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:23,303 INFO L124 PetriNetUnfolderBase]: 473/2094 cut-off events. [2023-12-05 21:17:23,303 INFO L125 PetriNetUnfolderBase]: For 1876/1888 co-relation queries the response was YES. [2023-12-05 21:17:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 2094 events. 473/2094 cut-off events. For 1876/1888 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17878 event pairs, 396 based on Foata normal form. 0/1754 useless extension candidates. Maximal degree in co-relation 4001. Up to 857 conditions per place. [2023-12-05 21:17:23,314 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 44 selfloop transitions, 21 changer transitions 4/252 dead transitions. [2023-12-05 21:17:23,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 252 transitions, 1039 flow [2023-12-05 21:17:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3864 transitions. [2023-12-05 21:17:23,320 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2023-12-05 21:17:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3864 transitions. [2023-12-05 21:17:23,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3864 transitions. [2023-12-05 21:17:23,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:23,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3864 transitions. [2023-12-05 21:17:23,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 184.0) internal successors, (3864), 21 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:23,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:23,376 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:23,376 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 24 predicate places. [2023-12-05 21:17:23,377 INFO L500 AbstractCegarLoop]: Abstraction has has 234 places, 252 transitions, 1039 flow [2023-12-05 21:17:23,378 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.27777777777777) internal successors, (3299), 18 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:23,378 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:23,378 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:23,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:23,583 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-05 21:17:23,584 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:23,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -307802196, now seen corresponding path program 2 times [2023-12-05 21:17:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:23,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088318951] [2023-12-05 21:17:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:23,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:23,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:23,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088318951] [2023-12-05 21:17:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088318951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141975905] [2023-12-05 21:17:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:23,841 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) [2023-12-05 21:17:23,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:23,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:23,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:23,953 INFO L378 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 1 [2023-12-05 21:17:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:23,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141975905] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:23,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40221079] [2023-12-05 21:17:23,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:23,996 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:23,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:23,997 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 240 [2023-12-05 21:17:23,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 252 transitions, 1039 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:23,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:23,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 240 [2023-12-05 21:17:23,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:24,352 INFO L124 PetriNetUnfolderBase]: 752/2615 cut-off events. [2023-12-05 21:17:24,352 INFO L125 PetriNetUnfolderBase]: For 4232/4447 co-relation queries the response was YES. [2023-12-05 21:17:24,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6786 conditions, 2615 events. 752/2615 cut-off events. For 4232/4447 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22561 event pairs, 648 based on Foata normal form. 0/2397 useless extension candidates. Maximal degree in co-relation 6513. Up to 1159 conditions per place. [2023-12-05 21:17:24,366 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 98 selfloop transitions, 4 changer transitions 7/290 dead transitions. [2023-12-05 21:17:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 290 transitions, 1481 flow [2023-12-05 21:17:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-12-05 21:17:24,368 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7260416666666667 [2023-12-05 21:17:24,368 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-12-05 21:17:24,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-12-05 21:17:24,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:24,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-12-05 21:17:24,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:24,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:24,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:24,371 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 27 predicate places. [2023-12-05 21:17:24,372 INFO L500 AbstractCegarLoop]: Abstraction has has 237 places, 290 transitions, 1481 flow [2023-12-05 21:17:24,372 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:24,372 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:24,372 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:24,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:17:24,577 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:24,577 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:24,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 95300377, now seen corresponding path program 1 times [2023-12-05 21:17:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709740511] [2023-12-05 21:17:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:24,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:24,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709740511] [2023-12-05 21:17:24,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709740511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:24,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481190101] [2023-12-05 21:17:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:24,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:24,817 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) [2023-12-05 21:17:24,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:24,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:24,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:25,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481190101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:25,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090011382] [2023-12-05 21:17:25,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:25,147 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:25,177 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:25,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 290 transitions, 1481 flow. Second operand has 23 states, 23 states have (on average 183.47826086956522) internal successors, (4220), 23 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:25,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:25,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:25,711 INFO L124 PetriNetUnfolderBase]: 752/2614 cut-off events. [2023-12-05 21:17:25,711 INFO L125 PetriNetUnfolderBase]: For 6209/6310 co-relation queries the response was YES. [2023-12-05 21:17:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 2614 events. 752/2614 cut-off events. For 6209/6310 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22467 event pairs, 532 based on Foata normal form. 0/2411 useless extension candidates. Maximal degree in co-relation 7000. Up to 1159 conditions per place. [2023-12-05 21:17:25,723 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 64 selfloop transitions, 30 changer transitions 7/305 dead transitions. [2023-12-05 21:17:25,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 305 transitions, 1791 flow [2023-12-05 21:17:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5507 transitions. [2023-12-05 21:17:25,733 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7648611111111111 [2023-12-05 21:17:25,733 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5507 transitions. [2023-12-05 21:17:25,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5507 transitions. [2023-12-05 21:17:25,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:25,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5507 transitions. [2023-12-05 21:17:25,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 183.56666666666666) internal successors, (5507), 30 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,754 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,756 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 56 predicate places. [2023-12-05 21:17:25,756 INFO L500 AbstractCegarLoop]: Abstraction has has 266 places, 305 transitions, 1791 flow [2023-12-05 21:17:25,767 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 183.47826086956522) internal successors, (4220), 23 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,767 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:25,767 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:25,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:25,971 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:25,972 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:25,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 223007164, now seen corresponding path program 2 times [2023-12-05 21:17:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247363025] [2023-12-05 21:17:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:26,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247363025] [2023-12-05 21:17:26,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247363025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:26,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063357516] [2023-12-05 21:17:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:26,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:26,153 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) [2023-12-05 21:17:26,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:26,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:26,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:26,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:26,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:26,251 INFO L378 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 1 [2023-12-05 21:17:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:26,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063357516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:26,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:26,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:26,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540262655] [2023-12-05 21:17:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:26,345 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:26,349 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 240 [2023-12-05 21:17:26,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 305 transitions, 1791 flow. Second operand has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:26,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 240 [2023-12-05 21:17:26,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:26,830 INFO L124 PetriNetUnfolderBase]: 746/2602 cut-off events. [2023-12-05 21:17:26,830 INFO L125 PetriNetUnfolderBase]: For 8436/8783 co-relation queries the response was YES. [2023-12-05 21:17:26,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8626 conditions, 2602 events. 746/2602 cut-off events. For 8436/8783 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 22463 event pairs, 157 based on Foata normal form. 15/2452 useless extension candidates. Maximal degree in co-relation 8220. Up to 1135 conditions per place. [2023-12-05 21:17:26,846 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 166 selfloop transitions, 8 changer transitions 7/376 dead transitions. [2023-12-05 21:17:26,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 376 transitions, 2793 flow [2023-12-05 21:17:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1360 transitions. [2023-12-05 21:17:26,848 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-12-05 21:17:26,848 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1360 transitions. [2023-12-05 21:17:26,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1360 transitions. [2023-12-05 21:17:26,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:26,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1360 transitions. [2023-12-05 21:17:26,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 170.0) internal successors, (1360), 8 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,853 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,853 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 62 predicate places. [2023-12-05 21:17:26,853 INFO L500 AbstractCegarLoop]: Abstraction has has 272 places, 376 transitions, 2793 flow [2023-12-05 21:17:26,854 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,854 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:26,854 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:26,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:27,058 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:27,059 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:27,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1676711805, now seen corresponding path program 1 times [2023-12-05 21:17:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:27,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211472216] [2023-12-05 21:17:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:27,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:27,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:27,109 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:27,110 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2023-12-05 21:17:27,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2023-12-05 21:17:27,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2023-12-05 21:17:27,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2023-12-05 21:17:27,113 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:27,114 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:27,115 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:27,115 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:27,141 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:27,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:27,229 INFO L124 PetriNetUnfolderBase]: 80/554 cut-off events. [2023-12-05 21:17:27,229 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-12-05 21:17:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 554 events. 80/554 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2661 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-12-05 21:17:27,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:27,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:27,237 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:27,237 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1b28f66a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:27,237 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:27,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:27,239 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:27,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:27,239 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:27,239 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:27,239 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:27,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -328681030, now seen corresponding path program 1 times [2023-12-05 21:17:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426122959] [2023-12-05 21:17:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:27,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426122959] [2023-12-05 21:17:27,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426122959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:27,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:27,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370577320] [2023-12-05 21:17:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:27,255 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:27,256 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 332 [2023-12-05 21:17:27,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 332 transitions, 680 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:27,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 332 [2023-12-05 21:17:27,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:28,169 INFO L124 PetriNetUnfolderBase]: 1577/9160 cut-off events. [2023-12-05 21:17:28,169 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-12-05 21:17:28,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11627 conditions, 9160 events. 1577/9160 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 106880 event pairs, 1464 based on Foata normal form. 2921/10503 useless extension candidates. Maximal degree in co-relation 1347. Up to 2411 conditions per place. [2023-12-05 21:17:28,228 INFO L140 encePairwiseOnDemand]: 287/332 looper letters, 39 selfloop transitions, 2 changer transitions 1/285 dead transitions. [2023-12-05 21:17:28,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 668 flow [2023-12-05 21:17:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-12-05 21:17:28,231 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8383534136546185 [2023-12-05 21:17:28,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-12-05 21:17:28,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-12-05 21:17:28,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:28,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-12-05 21:17:28,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,234 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, -7 predicate places. [2023-12-05 21:17:28,234 INFO L500 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 668 flow [2023-12-05 21:17:28,234 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,234 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:28,234 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:28,234 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:28,235 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:28,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -6925941, now seen corresponding path program 1 times [2023-12-05 21:17:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840863911] [2023-12-05 21:17:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840863911] [2023-12-05 21:17:28,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840863911] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261171131] [2023-12-05 21:17:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:28,290 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) [2023-12-05 21:17:28,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:28,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261171131] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:28,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:28,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:28,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898805300] [2023-12-05 21:17:28,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:28,388 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:28,390 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:28,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 285 transitions, 668 flow. Second operand has 10 states, 10 states have (on average 251.1) internal successors, (2511), 10 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:28,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:28,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:29,410 INFO L124 PetriNetUnfolderBase]: 1577/9167 cut-off events. [2023-12-05 21:17:29,411 INFO L125 PetriNetUnfolderBase]: For 1012/1056 co-relation queries the response was YES. [2023-12-05 21:17:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14062 conditions, 9167 events. 1577/9167 cut-off events. For 1012/1056 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 106827 event pairs, 1464 based on Foata normal form. 0/7589 useless extension candidates. Maximal degree in co-relation 1691. Up to 2416 conditions per place. [2023-12-05 21:17:29,469 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 40 selfloop transitions, 9 changer transitions 1/292 dead transitions. [2023-12-05 21:17:29,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 292 transitions, 790 flow [2023-12-05 21:17:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2292 transitions. [2023-12-05 21:17:29,473 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7670682730923695 [2023-12-05 21:17:29,473 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2292 transitions. [2023-12-05 21:17:29,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2292 transitions. [2023-12-05 21:17:29,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:29,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2292 transitions. [2023-12-05 21:17:29,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 254.66666666666666) internal successors, (2292), 9 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:29,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:29,480 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:29,481 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2023-12-05 21:17:29,481 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 292 transitions, 790 flow [2023-12-05 21:17:29,481 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 251.1) internal successors, (2511), 10 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:29,481 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:29,482 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:29,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:29,686 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:29,686 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:29,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 604420843, now seen corresponding path program 2 times [2023-12-05 21:17:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:29,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846868764] [2023-12-05 21:17:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:29,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846868764] [2023-12-05 21:17:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846868764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:29,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987788178] [2023-12-05 21:17:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:29,712 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:29,713 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 332 [2023-12-05 21:17:29,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 292 transitions, 790 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:29,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:29,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 332 [2023-12-05 21:17:29,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:35,435 INFO L124 PetriNetUnfolderBase]: 18441/48352 cut-off events. [2023-12-05 21:17:35,436 INFO L125 PetriNetUnfolderBase]: For 26440/26612 co-relation queries the response was YES. [2023-12-05 21:17:35,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99911 conditions, 48352 events. 18441/48352 cut-off events. For 26440/26612 co-relation queries the response was YES. Maximal size of possible extension queue 1694. Compared 617491 event pairs, 15858 based on Foata normal form. 0/39255 useless extension candidates. Maximal degree in co-relation 7599. Up to 24699 conditions per place. [2023-12-05 21:17:35,907 INFO L140 encePairwiseOnDemand]: 328/332 looper letters, 106 selfloop transitions, 2 changer transitions 1/326 dead transitions. [2023-12-05 21:17:35,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 326 transitions, 1138 flow [2023-12-05 21:17:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-12-05 21:17:35,910 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7520080321285141 [2023-12-05 21:17:35,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-12-05 21:17:35,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-12-05 21:17:35,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:35,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-12-05 21:17:35,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:35,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:35,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:35,916 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2023-12-05 21:17:35,916 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 326 transitions, 1138 flow [2023-12-05 21:17:35,916 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:35,916 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:35,916 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:35,916 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:35,916 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 604420844, now seen corresponding path program 1 times [2023-12-05 21:17:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058949344] [2023-12-05 21:17:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058949344] [2023-12-05 21:17:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058949344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686700536] [2023-12-05 21:17:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:35,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:35,979 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) [2023-12-05 21:17:35,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-05 21:17:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:36,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:36,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:36,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:36,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686700536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:36,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:36,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:36,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628861433] [2023-12-05 21:17:36,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:36,138 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:36,142 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:36,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 326 transitions, 1138 flow. Second operand has 18 states, 18 states have (on average 251.27777777777777) internal successors, (4523), 18 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:36,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:36,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:36,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:42,047 INFO L124 PetriNetUnfolderBase]: 18441/48372 cut-off events. [2023-12-05 21:17:42,048 INFO L125 PetriNetUnfolderBase]: For 52401/52659 co-relation queries the response was YES. [2023-12-05 21:17:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111684 conditions, 48372 events. 18441/48372 cut-off events. For 52401/52659 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 617234 event pairs, 15858 based on Foata normal form. 0/39275 useless extension candidates. Maximal degree in co-relation 8969. Up to 24699 conditions per place. [2023-12-05 21:17:42,559 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 64 selfloop transitions, 21 changer transitions 1/346 dead transitions. [2023-12-05 21:17:42,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 346 transitions, 1420 flow [2023-12-05 21:17:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5302 transitions. [2023-12-05 21:17:42,566 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7604704532415376 [2023-12-05 21:17:42,566 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5302 transitions. [2023-12-05 21:17:42,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5302 transitions. [2023-12-05 21:17:42,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:42,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5302 transitions. [2023-12-05 21:17:42,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 252.47619047619048) internal successors, (5302), 21 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:42,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 332.0) internal successors, (7304), 22 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:42,583 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 332.0) internal successors, (7304), 22 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:42,583 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 21 predicate places. [2023-12-05 21:17:42,583 INFO L500 AbstractCegarLoop]: Abstraction has has 310 places, 346 transitions, 1420 flow [2023-12-05 21:17:42,584 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 251.27777777777777) internal successors, (4523), 18 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:42,584 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:42,584 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:42,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-05 21:17:42,793 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:42,793 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:42,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 571008428, now seen corresponding path program 2 times [2023-12-05 21:17:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357798516] [2023-12-05 21:17:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:42,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:42,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357798516] [2023-12-05 21:17:42,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357798516] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:42,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421898632] [2023-12-05 21:17:42,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:42,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:42,958 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) [2023-12-05 21:17:42,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-05 21:17:43,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:43,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:43,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:43,071 INFO L378 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 1 [2023-12-05 21:17:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:43,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421898632] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:43,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865427230] [2023-12-05 21:17:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:43,108 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:43,109 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 332 [2023-12-05 21:17:43,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 346 transitions, 1420 flow. Second operand has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:43,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:43,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 332 [2023-12-05 21:17:43,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:54,535 INFO L124 PetriNetUnfolderBase]: 36965/80864 cut-off events. [2023-12-05 21:17:54,535 INFO L125 PetriNetUnfolderBase]: For 168201/172034 co-relation queries the response was YES. [2023-12-05 21:17:54,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237926 conditions, 80864 events. 36965/80864 cut-off events. For 168201/172034 co-relation queries the response was YES. Maximal size of possible extension queue 2828. Compared 1009265 event pairs, 33250 based on Foata normal form. 0/73630 useless extension candidates. Maximal degree in co-relation 18704. Up to 45198 conditions per place. [2023-12-05 21:17:55,384 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 157 selfloop transitions, 4 changer transitions 1/404 dead transitions. [2023-12-05 21:17:55,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 404 transitions, 2082 flow [2023-12-05 21:17:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 969 transitions. [2023-12-05 21:17:55,386 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7296686746987951 [2023-12-05 21:17:55,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 969 transitions. [2023-12-05 21:17:55,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 969 transitions. [2023-12-05 21:17:55,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:55,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 969 transitions. [2023-12-05 21:17:55,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:55,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:55,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:55,390 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 24 predicate places. [2023-12-05 21:17:55,390 INFO L500 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 2082 flow [2023-12-05 21:17:55,390 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:55,390 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:55,390 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:55,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-05 21:17:55,595 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-05 21:17:55,595 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1956440705, now seen corresponding path program 1 times [2023-12-05 21:17:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690913455] [2023-12-05 21:17:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690913455] [2023-12-05 21:17:55,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690913455] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630893942] [2023-12-05 21:17:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:55,757 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) [2023-12-05 21:17:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-05 21:17:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:55,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:55,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:55,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630893942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:56,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165093192] [2023-12-05 21:17:56,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:56,022 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:56,027 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:56,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 404 transitions, 2082 flow. Second operand has 23 states, 23 states have (on average 251.47826086956522) internal successors, (5784), 23 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:56,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:56,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:56,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:07,515 INFO L124 PetriNetUnfolderBase]: 36965/80879 cut-off events. [2023-12-05 21:18:07,515 INFO L125 PetriNetUnfolderBase]: For 249517/253580 co-relation queries the response was YES. [2023-12-05 21:18:07,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258612 conditions, 80879 events. 36965/80879 cut-off events. For 249517/253580 co-relation queries the response was YES. Maximal size of possible extension queue 2822. Compared 1008793 event pairs, 33250 based on Foata normal form. 0/73645 useless extension candidates. Maximal degree in co-relation 20277. Up to 45198 conditions per place. [2023-12-05 21:18:08,412 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 94 selfloop transitions, 30 changer transitions 1/419 dead transitions. [2023-12-05 21:18:08,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 419 transitions, 2444 flow [2023-12-05 21:18:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:18:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:18:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7557 transitions. [2023-12-05 21:18:08,440 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7587349397590362 [2023-12-05 21:18:08,441 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7557 transitions. [2023-12-05 21:18:08,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7557 transitions. [2023-12-05 21:18:08,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:08,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7557 transitions. [2023-12-05 21:18:08,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 251.9) internal successors, (7557), 30 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:08,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 332.0) internal successors, (10292), 31 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:08,492 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 332.0) internal successors, (10292), 31 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:08,493 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 53 predicate places. [2023-12-05 21:18:08,493 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 419 transitions, 2444 flow [2023-12-05 21:18:08,495 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 251.47826086956522) internal successors, (5784), 23 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:08,495 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:08,495 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:08,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:08,695 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-05 21:18:08,696 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:08,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 334811118, now seen corresponding path program 2 times [2023-12-05 21:18:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:08,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337314010] [2023-12-05 21:18:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337314010] [2023-12-05 21:18:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337314010] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383305542] [2023-12-05 21:18:08,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:18:08,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:08,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:08,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:08,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-05 21:18:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:18:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:18:09,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:18:09,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:09,052 INFO L378 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 1 [2023-12-05 21:18:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:09,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:18:09,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383305542] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:09,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:18:09,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:18:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476813326] [2023-12-05 21:18:09,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:09,188 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:18:09,189 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 332 [2023-12-05 21:18:09,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 419 transitions, 2444 flow. Second operand has 7 states, 7 states have (on average 209.14285714285714) internal successors, (1464), 7 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:09,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:09,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 332 [2023-12-05 21:18:09,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:20,961 INFO L124 PetriNetUnfolderBase]: 36338/81161 cut-off events. [2023-12-05 21:18:20,961 INFO L125 PetriNetUnfolderBase]: For 326204/340289 co-relation queries the response was YES. [2023-12-05 21:18:21,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303068 conditions, 81161 events. 36338/81161 cut-off events. For 326204/340289 co-relation queries the response was YES. Maximal size of possible extension queue 2796. Compared 1022048 event pairs, 6413 based on Foata normal form. 96/75458 useless extension candidates. Maximal degree in co-relation 62344. Up to 43754 conditions per place. [2023-12-05 21:18:21,811 INFO L140 encePairwiseOnDemand]: 323/332 looper letters, 313 selfloop transitions, 10 changer transitions 1/580 dead transitions. [2023-12-05 21:18:21,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 580 transitions, 4542 flow [2023-12-05 21:18:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2161 transitions. [2023-12-05 21:18:21,814 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7232262382864793 [2023-12-05 21:18:21,814 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2161 transitions. [2023-12-05 21:18:21,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2161 transitions. [2023-12-05 21:18:21,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2161 transitions. [2023-12-05 21:18:21,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.11111111111111) internal successors, (2161), 9 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:21,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:21,819 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:21,820 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 60 predicate places. [2023-12-05 21:18:21,820 INFO L500 AbstractCegarLoop]: Abstraction has has 349 places, 580 transitions, 4542 flow [2023-12-05 21:18:21,820 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 209.14285714285714) internal successors, (1464), 7 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:21,820 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:21,820 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:21,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-05 21:18:22,026 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-05 21:18:22,026 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:22,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash 34800293, now seen corresponding path program 1 times [2023-12-05 21:18:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536655704] [2023-12-05 21:18:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:22,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:22,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536655704] [2023-12-05 21:18:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536655704] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:22,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542965755] [2023-12-05 21:18:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:22,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:22,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:22,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:22,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-05 21:18:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:22,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:18:22,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:22,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:22,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542965755] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:22,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:22,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:18:22,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566536263] [2023-12-05 21:18:22,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:22,235 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:18:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:18:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:18:22,237 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 332 [2023-12-05 21:18:22,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 580 transitions, 4542 flow. Second operand has 10 states, 10 states have (on average 250.6) internal successors, (2506), 10 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:22,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:22,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 332 [2023-12-05 21:18:22,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:23,788 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 240#t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:23,788 INFO L294 olderBase$Statistics]: this new event has 166 ancestors and is cut-off event [2023-12-05 21:18:23,788 INFO L297 olderBase$Statistics]: existing Event has 157 ancestors and is cut-off event [2023-12-05 21:18:23,788 INFO L297 olderBase$Statistics]: existing Event has 157 ancestors and is cut-off event [2023-12-05 21:18:23,788 INFO L297 olderBase$Statistics]: existing Event has 166 ancestors and is cut-off event [2023-12-05 21:18:23,831 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][396], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 240#t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 41#L953-4true, 102#L945-2true, 1985#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~3#1| 9999) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1147#true, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1)]) [2023-12-05 21:18:23,831 INFO L294 olderBase$Statistics]: this new event has 167 ancestors and is cut-off event [2023-12-05 21:18:23,831 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:23,831 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:23,831 INFO L297 olderBase$Statistics]: existing Event has 167 ancestors and is cut-off event [2023-12-05 21:18:23,838 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 93#t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:23,838 INFO L294 olderBase$Statistics]: this new event has 167 ancestors and is cut-off event [2023-12-05 21:18:23,839 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:23,839 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:23,839 INFO L297 olderBase$Statistics]: existing Event has 167 ancestors and is cut-off event [2023-12-05 21:18:23,861 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][396], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 41#L953-4true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 1985#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~3#1| 9999) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1147#true, 93#t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1)]) [2023-12-05 21:18:23,862 INFO L294 olderBase$Statistics]: this new event has 168 ancestors and is cut-off event [2023-12-05 21:18:23,862 INFO L297 olderBase$Statistics]: existing Event has 159 ancestors and is cut-off event [2023-12-05 21:18:23,862 INFO L297 olderBase$Statistics]: existing Event has 159 ancestors and is cut-off event [2023-12-05 21:18:23,862 INFO L297 olderBase$Statistics]: existing Event has 168 ancestors and is cut-off event [2023-12-05 21:18:23,894 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 127#t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:23,894 INFO L294 olderBase$Statistics]: this new event has 169 ancestors and is cut-off event [2023-12-05 21:18:23,894 INFO L297 olderBase$Statistics]: existing Event has 169 ancestors and is cut-off event [2023-12-05 21:18:23,894 INFO L297 olderBase$Statistics]: existing Event has 160 ancestors and is cut-off event [2023-12-05 21:18:23,894 INFO L297 olderBase$Statistics]: existing Event has 160 ancestors and is cut-off event [2023-12-05 21:18:24,029 INFO L124 PetriNetUnfolderBase]: 5536/13296 cut-off events. [2023-12-05 21:18:24,029 INFO L125 PetriNetUnfolderBase]: For 62266/68468 co-relation queries the response was YES. [2023-12-05 21:18:24,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50352 conditions, 13296 events. 5536/13296 cut-off events. For 62266/68468 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 136602 event pairs, 1455 based on Foata normal form. 639/13433 useless extension candidates. Maximal degree in co-relation 29861. Up to 7334 conditions per place. [2023-12-05 21:18:24,132 INFO L140 encePairwiseOnDemand]: 327/332 looper letters, 121 selfloop transitions, 7 changer transitions 1/428 dead transitions. [2023-12-05 21:18:24,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 428 transitions, 3750 flow [2023-12-05 21:18:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2338 transitions. [2023-12-05 21:18:24,136 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7824631860776439 [2023-12-05 21:18:24,136 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2338 transitions. [2023-12-05 21:18:24,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2338 transitions. [2023-12-05 21:18:24,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:24,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2338 transitions. [2023-12-05 21:18:24,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 259.77777777777777) internal successors, (2338), 9 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:24,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:24,170 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:24,170 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, -8 predicate places. [2023-12-05 21:18:24,170 INFO L500 AbstractCegarLoop]: Abstraction has has 281 places, 428 transitions, 3750 flow [2023-12-05 21:18:24,171 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.6) internal successors, (2506), 10 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:24,171 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:24,171 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:24,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:24,376 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-05 21:18:24,377 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:24,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 269404677, now seen corresponding path program 1 times [2023-12-05 21:18:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:24,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281599469] [2023-12-05 21:18:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:24,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:18:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:24,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:18:24,559 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:18:24,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:18:24,560 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:18:24,561 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:18:24,561 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:18:24,561 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1] [2023-12-05 21:18:24,562 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:18:24,562 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:18:24,600 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-05 21:18:24,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:24,681 INFO L124 PetriNetUnfolderBase]: 117/810 cut-off events. [2023-12-05 21:18:24,682 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-12-05 21:18:24,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 810 events. 117/810 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4238 event pairs, 1 based on Foata normal form. 0/595 useless extension candidates. Maximal degree in co-relation 562. Up to 16 conditions per place. [2023-12-05 21:18:24,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:24,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:24,701 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:24,701 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1b28f66a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:24,701 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:18:24,702 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:24,703 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:18:24,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:24,703 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:24,703 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:24,703 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:18:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1876197022, now seen corresponding path program 1 times [2023-12-05 21:18:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317012809] [2023-12-05 21:18:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:24,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:24,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317012809] [2023-12-05 21:18:24,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317012809] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:24,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:24,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59192192] [2023-12-05 21:18:24,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:24,717 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:24,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:24,718 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 424 [2023-12-05 21:18:24,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 424 transitions, 875 flow. Second operand has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:24,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:24,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 424 [2023-12-05 21:18:24,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand