/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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/weaver/popl20-mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:39:44,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:39:44,952 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 [2023-11-30 05:39:44,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:39:44,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:39:44,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:39:44,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:39:44,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:39:44,977 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:39:44,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:39:44,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:39:44,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:39:44,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:39:44,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:39:44,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:39:44,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:39:44,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:39:44,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:39:44,982 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:39:44,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:39:44,982 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:39:44,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:39:44,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:39:44,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:39:44,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:39:44,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:39:44,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:39:44,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:39:44,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:39:45,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:39:45,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:39:45,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:39:45,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:39:45,192 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:39:45,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-11-30 05:39:46,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:39:46,338 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:39:46,339 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-11-30 05:39:46,344 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91b0c0ab/cf55dab4380c49768d919953aba54695/FLAG93400fbb0 [2023-11-30 05:39:46,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91b0c0ab/cf55dab4380c49768d919953aba54695 [2023-11-30 05:39:46,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:39:46,361 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:39:46,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:39:46,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:39:46,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:39:46,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea73bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46, skipping insertion in model container [2023-11-30 05:39:46,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:39:46,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:39:46,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:39:46,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:39:46,581 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-30 05:39:46,581 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-30 05:39:46,586 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:39:46,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46 WrapperNode [2023-11-30 05:39:46,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:39:46,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:39:46,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:39:46,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:39:46,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,643 INFO L138 Inliner]: procedures = 23, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 124 [2023-11-30 05:39:46,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:39:46,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:39:46,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:39:46,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:39:46,666 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:39:46,688 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:39:46,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:39:46,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:39:46,689 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (1/1) ... [2023-11-30 05:39:46,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:39:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:39:46,733 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) [2023-11-30 05:39:46,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:39:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-30 05:39:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-30 05:39:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-30 05:39:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-30 05:39:46,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-30 05:39:46,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:39:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-30 05:39:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-30 05:39:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:39:46,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:39:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:39:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:39:46,755 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:39:46,745 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 [2023-11-30 05:39:46,852 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:39:46,857 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:39:47,303 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:39:47,339 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:39:47,340 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-30 05:39:47,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:39:47 BoogieIcfgContainer [2023-11-30 05:39:47,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:39:47,343 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:39:47,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:39:47,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:39:47,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:39:46" (1/3) ... [2023-11-30 05:39:47,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a35f0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:39:47, skipping insertion in model container [2023-11-30 05:39:47,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:39:46" (2/3) ... [2023-11-30 05:39:47,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a35f0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:39:47, skipping insertion in model container [2023-11-30 05:39:47,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:39:47" (3/3) ... [2023-11-30 05:39:47,347 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-11-30 05:39:47,358 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:39:47,358 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-30 05:39:47,358 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:39:47,478 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:39:47,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 157 transitions, 342 flow [2023-11-30 05:39:47,556 INFO L124 PetriNetUnfolderBase]: 10/153 cut-off events. [2023-11-30 05:39:47,556 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-30 05:39:47,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 153 events. 10/153 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-11-30 05:39:47,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 157 transitions, 342 flow [2023-11-30 05:39:47,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 127 transitions, 275 flow [2023-11-30 05:39:47,571 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:39:47,574 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;@16cb827b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:39:47,575 INFO L363 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-30 05:39:47,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:39:47,579 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-11-30 05:39:47,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:39:47,579 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:47,580 INFO L232 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] [2023-11-30 05:39:47,580 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:47,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash 559512017, now seen corresponding path program 1 times [2023-11-30 05:39:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462574543] [2023-11-30 05:39:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462574543] [2023-11-30 05:39:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462574543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:47,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:47,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:39:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665908920] [2023-11-30 05:39:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:47,876 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:39:47,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:39:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:39:47,895 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 157 [2023-11-30 05:39:47,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:47,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:47,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 157 [2023-11-30 05:39:47,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:47,973 INFO L124 PetriNetUnfolderBase]: 58/254 cut-off events. [2023-11-30 05:39:47,974 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-30 05:39:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 254 events. 58/254 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 813 event pairs, 33 based on Foata normal form. 116/341 useless extension candidates. Maximal degree in co-relation 276. Up to 109 conditions per place. [2023-11-30 05:39:47,978 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 32 selfloop transitions, 1 changer transitions 1/120 dead transitions. [2023-11-30 05:39:47,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 120 transitions, 327 flow [2023-11-30 05:39:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-11-30 05:39:47,987 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.772823779193206 [2023-11-30 05:39:47,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-11-30 05:39:47,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-11-30 05:39:47,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:47,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-11-30 05:39:47,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:47,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:47,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:47,997 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2023-11-30 05:39:47,997 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 120 transitions, 327 flow [2023-11-30 05:39:47,997 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:47,998 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:47,998 INFO L232 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] [2023-11-30 05:39:47,998 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:39:47,998 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:47,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash 559512018, now seen corresponding path program 1 times [2023-11-30 05:39:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:47,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260906342] [2023-11-30 05:39:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260906342] [2023-11-30 05:39:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260906342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:39:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55497979] [2023-11-30 05:39:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,191 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:39:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:39:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:39:48,193 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 157 [2023-11-30 05:39:48,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 120 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 157 [2023-11-30 05:39:48,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,276 INFO L124 PetriNetUnfolderBase]: 64/264 cut-off events. [2023-11-30 05:39:48,277 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-11-30 05:39:48,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 264 events. 64/264 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 879 event pairs, 37 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 372. Up to 123 conditions per place. [2023-11-30 05:39:48,282 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 36 selfloop transitions, 1 changer transitions 1/118 dead transitions. [2023-11-30 05:39:48,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 118 transitions, 393 flow [2023-11-30 05:39:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-30 05:39:48,286 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.732484076433121 [2023-11-30 05:39:48,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-30 05:39:48,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-30 05:39:48,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-30 05:39:48,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,290 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, 0 predicate places. [2023-11-30 05:39:48,290 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 118 transitions, 393 flow [2023-11-30 05:39:48,291 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,291 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:48,291 INFO L232 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] [2023-11-30 05:39:48,291 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:39:48,291 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:48,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash -931961445, now seen corresponding path program 1 times [2023-11-30 05:39:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796595432] [2023-11-30 05:39:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796595432] [2023-11-30 05:39:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796595432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:39:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064067574] [2023-11-30 05:39:48,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,454 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:39:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:39:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:39:48,456 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 157 [2023-11-30 05:39:48,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 118 transitions, 393 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 157 [2023-11-30 05:39:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,522 INFO L124 PetriNetUnfolderBase]: 52/242 cut-off events. [2023-11-30 05:39:48,522 INFO L125 PetriNetUnfolderBase]: For 107/117 co-relation queries the response was YES. [2023-11-30 05:39:48,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 52/242 cut-off events. For 107/117 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 771 event pairs, 29 based on Foata normal form. 5/226 useless extension candidates. Maximal degree in co-relation 383. Up to 101 conditions per place. [2023-11-30 05:39:48,525 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 1 changer transitions 1/114 dead transitions. [2023-11-30 05:39:48,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 114 transitions, 439 flow [2023-11-30 05:39:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-11-30 05:39:48,527 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7282377919320594 [2023-11-30 05:39:48,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-11-30 05:39:48,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-11-30 05:39:48,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-11-30 05:39:48,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,529 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-11-30 05:39:48,530 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 439 flow [2023-11-30 05:39:48,530 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,530 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:48,530 INFO L232 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] [2023-11-30 05:39:48,530 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 05:39:48,530 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:48,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash -459883293, now seen corresponding path program 1 times [2023-11-30 05:39:48,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:48,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731364242] [2023-11-30 05:39:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731364242] [2023-11-30 05:39:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731364242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:39:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63274106] [2023-11-30 05:39:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,600 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:39:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:39:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:39:48,601 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 157 [2023-11-30 05:39:48,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 157 [2023-11-30 05:39:48,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,649 INFO L124 PetriNetUnfolderBase]: 49/227 cut-off events. [2023-11-30 05:39:48,649 INFO L125 PetriNetUnfolderBase]: For 203/219 co-relation queries the response was YES. [2023-11-30 05:39:48,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 227 events. 49/227 cut-off events. For 203/219 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 673 event pairs, 27 based on Foata normal form. 3/215 useless extension candidates. Maximal degree in co-relation 422. Up to 94 conditions per place. [2023-11-30 05:39:48,652 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 27 selfloop transitions, 1 changer transitions 1/112 dead transitions. [2023-11-30 05:39:48,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 112 transitions, 483 flow [2023-11-30 05:39:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-11-30 05:39:48,653 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7770700636942676 [2023-11-30 05:39:48,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-11-30 05:39:48,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-11-30 05:39:48,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-11-30 05:39:48,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,656 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-11-30 05:39:48,656 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 112 transitions, 483 flow [2023-11-30 05:39:48,656 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,657 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:48,657 INFO L232 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] [2023-11-30 05:39:48,657 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:39:48,657 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:48,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -459883294, now seen corresponding path program 1 times [2023-11-30 05:39:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395102826] [2023-11-30 05:39:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395102826] [2023-11-30 05:39:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395102826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:39:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185323673] [2023-11-30 05:39:48,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,726 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:39:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:39:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:39:48,727 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 157 [2023-11-30 05:39:48,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 112 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 157 [2023-11-30 05:39:48,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,768 INFO L124 PetriNetUnfolderBase]: 46/212 cut-off events. [2023-11-30 05:39:48,768 INFO L125 PetriNetUnfolderBase]: For 299/315 co-relation queries the response was YES. [2023-11-30 05:39:48,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 212 events. 46/212 cut-off events. For 299/315 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 586 event pairs, 25 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 451. Up to 87 conditions per place. [2023-11-30 05:39:48,771 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 26 selfloop transitions, 1 changer transitions 1/110 dead transitions. [2023-11-30 05:39:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 110 transitions, 517 flow [2023-11-30 05:39:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-11-30 05:39:48,772 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7494692144373672 [2023-11-30 05:39:48,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-11-30 05:39:48,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-11-30 05:39:48,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-11-30 05:39:48,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,774 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-11-30 05:39:48,774 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 110 transitions, 517 flow [2023-11-30 05:39:48,775 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,775 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:48,775 INFO L232 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, 1, 1, 1, 1, 1, 1] [2023-11-30 05:39:48,775 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 05:39:48,775 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:48,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 952871822, now seen corresponding path program 1 times [2023-11-30 05:39:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:48,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853215320] [2023-11-30 05:39:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853215320] [2023-11-30 05:39:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853215320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:39:48,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850600714] [2023-11-30 05:39:48,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,827 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:39:48,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:39:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:39:48,828 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 157 [2023-11-30 05:39:48,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 110 transitions, 517 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 157 [2023-11-30 05:39:48,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,869 INFO L124 PetriNetUnfolderBase]: 43/205 cut-off events. [2023-11-30 05:39:48,869 INFO L125 PetriNetUnfolderBase]: For 438/458 co-relation queries the response was YES. [2023-11-30 05:39:48,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 205 events. 43/205 cut-off events. For 438/458 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 544 event pairs, 23 based on Foata normal form. 4/199 useless extension candidates. Maximal degree in co-relation 486. Up to 80 conditions per place. [2023-11-30 05:39:48,872 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 25 selfloop transitions, 1 changer transitions 1/108 dead transitions. [2023-11-30 05:39:48,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 108 transitions, 553 flow [2023-11-30 05:39:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-11-30 05:39:48,873 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.772823779193206 [2023-11-30 05:39:48,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-11-30 05:39:48,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-11-30 05:39:48,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-11-30 05:39:48,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,875 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-11-30 05:39:48,875 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 108 transitions, 553 flow [2023-11-30 05:39:48,876 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,876 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:39:48,876 INFO L232 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, 1, 1, 1, 1, 1, 1] [2023-11-30 05:39:48,876 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 05:39:48,876 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-30 05:39:48,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:39:48,876 INFO L85 PathProgramCache]: Analyzing trace with hash 952871821, now seen corresponding path program 1 times [2023-11-30 05:39:48,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:39:48,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245116110] [2023-11-30 05:39:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:39:48,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:39:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:39:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:39:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:39:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245116110] [2023-11-30 05:39:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245116110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:39:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:39:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:39:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411508836] [2023-11-30 05:39:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:39:48,910 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:39:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:39:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:39:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:39:48,911 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 157 [2023-11-30 05:39:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 108 transitions, 553 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:39:48,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 157 [2023-11-30 05:39:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:39:48,947 INFO L124 PetriNetUnfolderBase]: 40/198 cut-off events. [2023-11-30 05:39:48,947 INFO L125 PetriNetUnfolderBase]: For 575/599 co-relation queries the response was YES. [2023-11-30 05:39:48,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 198 events. 40/198 cut-off events. For 575/599 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 21 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 511. Up to 73 conditions per place. [2023-11-30 05:39:48,949 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-11-30 05:39:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 106 transitions, 579 flow [2023-11-30 05:39:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:39:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:39:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-11-30 05:39:48,950 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7452229299363057 [2023-11-30 05:39:48,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-11-30 05:39:48,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-11-30 05:39:48,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:39:48,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-11-30 05:39:48,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,952 INFO L307 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-11-30 05:39:48,952 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 106 transitions, 579 flow [2023-11-30 05:39:48,953 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:39:48,957 INFO L143 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/popl20-mult-4.wvr.c_BEv2_AllErrorsAtOnce [2023-11-30 05:39:48,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2023-11-30 05:39:48,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-11-30 05:39:48,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-11-30 05:39:48,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2023-11-30 05:39:48,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 20 remaining) [2023-11-30 05:39:48,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 20 remaining) [2023-11-30 05:39:48,975 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 05:39:48,976 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:39:48,978 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-30 05:39:48,978 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-11-30 05:39:48,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 05:39:48 BasicIcfg [2023-11-30 05:39:48,982 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-30 05:39:48,982 INFO L158 Benchmark]: Toolchain (without parser) took 2621.10ms. Allocated memory is still 448.8MB. Free memory was 404.5MB in the beginning and 307.5MB in the end (delta: 97.0MB). Peak memory consumption was 99.4MB. Max. memory is 16.0GB. [2023-11-30 05:39:48,983 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 308.3MB. Free memory was 261.6MB in the beginning and 261.5MB in the end (delta: 169.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-11-30 05:39:48,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.47ms. Allocated memory is still 448.8MB. Free memory was 404.2MB in the beginning and 392.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-11-30 05:39:48,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.67ms. Allocated memory is still 448.8MB. Free memory was 392.9MB in the beginning and 391.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-11-30 05:39:48,983 INFO L158 Benchmark]: Boogie Preprocessor took 44.02ms. Allocated memory is still 448.8MB. Free memory was 391.1MB in the beginning and 389.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-11-30 05:39:48,984 INFO L158 Benchmark]: RCFGBuilder took 652.52ms. Allocated memory is still 448.8MB. Free memory was 389.5MB in the beginning and 368.6MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-11-30 05:39:48,984 INFO L158 Benchmark]: TraceAbstraction took 1639.21ms. Allocated memory is still 448.8MB. Free memory was 368.1MB in the beginning and 307.5MB in the end (delta: 60.6MB). Peak memory consumption was 63.7MB. Max. memory is 16.0GB. [2023-11-30 05:39:48,985 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 308.3MB. Free memory was 261.6MB in the beginning and 261.5MB in the end (delta: 169.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 222.47ms. Allocated memory is still 448.8MB. Free memory was 404.2MB in the beginning and 392.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.67ms. Allocated memory is still 448.8MB. Free memory was 392.9MB in the beginning and 391.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 44.02ms. Allocated memory is still 448.8MB. Free memory was 391.1MB in the beginning and 389.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 652.52ms. Allocated memory is still 448.8MB. Free memory was 389.5MB in the beginning and 368.6MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 1639.21ms. Allocated memory is still 448.8MB. Free memory was 368.1MB in the beginning and 307.5MB in the end (delta: 60.6MB). Peak memory consumption was 63.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 196 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 187 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 187 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 200 IncrementalHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 44 mSDtfsCounter, 200 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=579occurred in iteration=7, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 276 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 269 ConstructedInterpolants, 0 QuantifiedInterpolants, 1416 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-30 05:39:49,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...