/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/06-symbeq_05-funloop_hard2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:12:13,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:12:13,050 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 21:12:13,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:12:13,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:12:13,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:12:13,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:12:13,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:12:13,077 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:12:13,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:12:13,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:12:13,078 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:12:13,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:12:13,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:12:13,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:12:13,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:12:13,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:12:13,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:12:13,080 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:12:13,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:12:13,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:12:13,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:12:13,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:12:13,085 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:12:13,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:12:13,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:13,089 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:12:13,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:12:13,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:12:13,090 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:12:13,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:12:13,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:12:13,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:12:13,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:12:13,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:12:13,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:12:13,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:12:13,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:12:13,363 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:12:13,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-12-05 21:12:14,512 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:12:14,768 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:12:14,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-12-05 21:12:14,784 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee6f81d86/521f91ec0ac14db1a7b262e4a6b6889f/FLAG309bc5232 [2023-12-05 21:12:14,797 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee6f81d86/521f91ec0ac14db1a7b262e4a6b6889f [2023-12-05 21:12:14,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:12:14,801 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:12:14,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:14,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:12:14,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:12:14,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:14" (1/1) ... [2023-12-05 21:12:14,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52528444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:14, skipping insertion in model container [2023-12-05 21:12:14,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:14" (1/1) ... [2023-12-05 21:12:14,868 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:12:15,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:15,330 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:12:15,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:15,427 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:12:15,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15 WrapperNode [2023-12-05 21:12:15,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:15,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:15,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:12:15,430 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:12:15,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,499 INFO L138 Inliner]: procedures = 263, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-12-05 21:12:15,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:15,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:12:15,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:12:15,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:12:15,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:12:15,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:12:15,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:12:15,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:12:15,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (1/1) ... [2023-12-05 21:12:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:15,595 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 21:12:15,627 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 21:12:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:12:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:12:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:12:15,638 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:12:15,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:12:15,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:12:15,640 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 21:12:15,794 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:12:15,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:12:16,004 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:12:16,027 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:12:16,027 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-05 21:12:16,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:16 BoogieIcfgContainer [2023-12-05 21:12:16,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:12:16,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:12:16,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:12:16,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:12:16,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:12:14" (1/3) ... [2023-12-05 21:12:16,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4415a3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:16, skipping insertion in model container [2023-12-05 21:12:16,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:15" (2/3) ... [2023-12-05 21:12:16,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4415a3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:16, skipping insertion in model container [2023-12-05 21:12:16,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:16" (3/3) ... [2023-12-05 21:12:16,036 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-12-05 21:12:16,053 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:12:16,053 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-12-05 21:12:16,053 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:12:16,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:12:16,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 204 flow [2023-12-05 21:12:16,215 INFO L124 PetriNetUnfolderBase]: 6/99 cut-off events. [2023-12-05 21:12:16,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:16,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 99 events. 6/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 214 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-12-05 21:12:16,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 100 transitions, 204 flow [2023-12-05 21:12:16,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 201 flow [2023-12-05 21:12:16,243 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:12:16,250 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;@47050db2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:12:16,250 INFO L363 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-12-05 21:12:16,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:12:16,261 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-12-05 21:12:16,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:16,261 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:16,262 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:16,263 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:16,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 508427640, now seen corresponding path program 1 times [2023-12-05 21:12:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:16,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201915094] [2023-12-05 21:12:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:16,483 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 21:12:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201915094] [2023-12-05 21:12:16,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201915094] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:16,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:16,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:12:16,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701293928] [2023-12-05 21:12:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:16,493 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:16,524 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 100 [2023-12-05 21:12:16,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 21:12:16,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:16,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 100 [2023-12-05 21:12:16,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:16,650 INFO L124 PetriNetUnfolderBase]: 17/198 cut-off events. [2023-12-05 21:12:16,651 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:12:16,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 198 events. 17/198 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 726 event pairs, 10 based on Foata normal form. 11/172 useless extension candidates. Maximal degree in co-relation 202. Up to 41 conditions per place. [2023-12-05 21:12:16,654 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 18 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-12-05 21:12:16,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 243 flow [2023-12-05 21:12:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-12-05 21:12:16,669 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2023-12-05 21:12:16,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-12-05 21:12:16,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-12-05 21:12:16,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:16,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-12-05 21:12:16,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:16,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:16,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:16,691 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 2 predicate places. [2023-12-05 21:12:16,692 INFO L500 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 243 flow [2023-12-05 21:12:16,692 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 21:12:16,692 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:16,692 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] [2023-12-05 21:12:16,693 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:12:16,695 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:16,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2049787948, now seen corresponding path program 1 times [2023-12-05 21:12:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:16,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431107343] [2023-12-05 21:12:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:16,818 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 21:12:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431107343] [2023-12-05 21:12:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431107343] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453091048] [2023-12-05 21:12:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:16,823 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 21:12:16,827 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 21:12:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:16,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:12:16,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:16,941 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 21:12:16,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:16,976 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 21:12:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453091048] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:16,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:16,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:12:16,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031793141] [2023-12-05 21:12:16,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:16,979 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:12:16,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:12:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:12:16,982 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 100 [2023-12-05 21:12:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 82.1) internal successors, (821), 10 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 21:12:16,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:16,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 100 [2023-12-05 21:12:16,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:17,104 INFO L124 PetriNetUnfolderBase]: 17/205 cut-off events. [2023-12-05 21:12:17,105 INFO L125 PetriNetUnfolderBase]: For 23/27 co-relation queries the response was YES. [2023-12-05 21:12:17,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 205 events. 17/205 cut-off events. For 23/27 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 711 event pairs, 10 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 233. Up to 46 conditions per place. [2023-12-05 21:12:17,107 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 19 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2023-12-05 21:12:17,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 107 transitions, 323 flow [2023-12-05 21:12:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:12:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:12:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2023-12-05 21:12:17,111 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2023-12-05 21:12:17,111 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2023-12-05 21:12:17,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2023-12-05 21:12:17,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:17,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2023-12-05 21:12:17,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 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 21:12:17,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:12:17,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:12:17,118 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 10 predicate places. [2023-12-05 21:12:17,118 INFO L500 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 323 flow [2023-12-05 21:12:17,119 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 82.1) internal successors, (821), 10 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 21:12:17,119 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:17,119 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] [2023-12-05 21:12:17,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:12:17,327 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 21:12:17,327 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:17,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1312518572, now seen corresponding path program 2 times [2023-12-05 21:12:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201479468] [2023-12-05 21:12:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:17,470 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 21:12:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201479468] [2023-12-05 21:12:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201479468] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:17,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:17,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:12:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198596012] [2023-12-05 21:12:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:17,472 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:17,473 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 100 [2023-12-05 21:12:17,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 21:12:17,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 100 [2023-12-05 21:12:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:17,599 INFO L124 PetriNetUnfolderBase]: 105/460 cut-off events. [2023-12-05 21:12:17,600 INFO L125 PetriNetUnfolderBase]: For 204/208 co-relation queries the response was YES. [2023-12-05 21:12:17,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 460 events. 105/460 cut-off events. For 204/208 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2637 event pairs, 72 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 798. Up to 178 conditions per place. [2023-12-05 21:12:17,608 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 32 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-12-05 21:12:17,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 409 flow [2023-12-05 21:12:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-12-05 21:12:17,611 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2023-12-05 21:12:17,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-12-05 21:12:17,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-12-05 21:12:17,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:17,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-12-05 21:12:17,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 21:12:17,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,614 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 11 predicate places. [2023-12-05 21:12:17,616 INFO L500 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 409 flow [2023-12-05 21:12:17,616 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 21:12:17,616 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:17,616 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] [2023-12-05 21:12:17,616 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:12:17,618 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:17,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1312518571, now seen corresponding path program 1 times [2023-12-05 21:12:17,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:17,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67625086] [2023-12-05 21:12:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:17,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:17,711 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 21:12:17,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:17,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67625086] [2023-12-05 21:12:17,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67625086] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:17,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:12:17,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439807550] [2023-12-05 21:12:17,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:17,712 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:17,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:17,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:17,714 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 100 [2023-12-05 21:12:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 100 [2023-12-05 21:12:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:17,844 INFO L124 PetriNetUnfolderBase]: 155/593 cut-off events. [2023-12-05 21:12:17,844 INFO L125 PetriNetUnfolderBase]: For 555/561 co-relation queries the response was YES. [2023-12-05 21:12:17,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 593 events. 155/593 cut-off events. For 555/561 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3768 event pairs, 114 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 1289. Up to 236 conditions per place. [2023-12-05 21:12:17,851 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 34 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2023-12-05 21:12:17,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 117 transitions, 505 flow [2023-12-05 21:12:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-12-05 21:12:17,853 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8 [2023-12-05 21:12:17,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-12-05 21:12:17,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-12-05 21:12:17,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:17,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-12-05 21:12:17,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 21:12:17,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,858 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 12 predicate places. [2023-12-05 21:12:17,858 INFO L500 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 505 flow [2023-12-05 21:12:17,858 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:17,858 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:17,859 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] [2023-12-05 21:12:17,859 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:12:17,860 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:17,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash -323453973, now seen corresponding path program 1 times [2023-12-05 21:12:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22140730] [2023-12-05 21:12:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:17,954 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 21:12:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:17,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22140730] [2023-12-05 21:12:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22140730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:17,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:12:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320905231] [2023-12-05 21:12:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:17,956 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:17,957 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 100 [2023-12-05 21:12:17,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 21:12:17,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:17,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 100 [2023-12-05 21:12:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:18,106 INFO L124 PetriNetUnfolderBase]: 251/990 cut-off events. [2023-12-05 21:12:18,106 INFO L125 PetriNetUnfolderBase]: For 1820/2069 co-relation queries the response was YES. [2023-12-05 21:12:18,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2395 conditions, 990 events. 251/990 cut-off events. For 1820/2069 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6848 event pairs, 164 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 2301. Up to 368 conditions per place. [2023-12-05 21:12:18,114 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 26 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-12-05 21:12:18,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 125 transitions, 609 flow [2023-12-05 21:12:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-12-05 21:12:18,116 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2023-12-05 21:12:18,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-12-05 21:12:18,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-12-05 21:12:18,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:18,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-12-05 21:12:18,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:18,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:18,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:18,121 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 14 predicate places. [2023-12-05 21:12:18,124 INFO L500 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 609 flow [2023-12-05 21:12:18,124 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 21:12:18,124 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:18,125 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] [2023-12-05 21:12:18,125 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:12:18,126 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:18,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1649182193, now seen corresponding path program 1 times [2023-12-05 21:12:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62360084] [2023-12-05 21:12:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:18,277 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 21:12:18,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:18,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62360084] [2023-12-05 21:12:18,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62360084] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912636416] [2023-12-05 21:12:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:18,285 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 21:12:18,309 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 21:12:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:18,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:12:18,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:18,437 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 21:12:18,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:18,537 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 21:12:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912636416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:18,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:12:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488477732] [2023-12-05 21:12:18,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:18,539 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:12:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:12:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:12:18,543 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 100 [2023-12-05 21:12:18,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 609 flow. Second operand has 18 states, 18 states have (on average 82.38888888888889) internal successors, (1483), 18 states have internal predecessors, (1483), 0 states have call successors, (0), 0 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 21:12:18,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:18,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 100 [2023-12-05 21:12:18,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:18,841 INFO L124 PetriNetUnfolderBase]: 251/864 cut-off events. [2023-12-05 21:12:18,841 INFO L125 PetriNetUnfolderBase]: For 2704/2897 co-relation queries the response was YES. [2023-12-05 21:12:18,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2512 conditions, 864 events. 251/864 cut-off events. For 2704/2897 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5536 event pairs, 154 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 2320. Up to 364 conditions per place. [2023-12-05 21:12:18,849 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 35 selfloop transitions, 21 changer transitions 0/145 dead transitions. [2023-12-05 21:12:18,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 145 transitions, 833 flow [2023-12-05 21:12:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:12:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:12:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1732 transitions. [2023-12-05 21:12:18,855 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8247619047619048 [2023-12-05 21:12:18,855 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1732 transitions. [2023-12-05 21:12:18,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1732 transitions. [2023-12-05 21:12:18,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:18,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1732 transitions. [2023-12-05 21:12:18,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.47619047619048) internal successors, (1732), 21 states have internal predecessors, (1732), 0 states have call successors, (0), 0 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 21:12:18,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 100.0) internal successors, (2200), 22 states have internal predecessors, (2200), 0 states have call successors, (0), 0 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 21:12:18,866 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 100.0) internal successors, (2200), 22 states have internal predecessors, (2200), 0 states have call successors, (0), 0 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 21:12:18,868 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 34 predicate places. [2023-12-05 21:12:18,868 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 833 flow [2023-12-05 21:12:18,869 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.38888888888889) internal successors, (1483), 18 states have internal predecessors, (1483), 0 states have call successors, (0), 0 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 21:12:18,869 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:18,869 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] [2023-12-05 21:12:18,878 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 21:12:19,075 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,SelfDestructingSolverStorable5 [2023-12-05 21:12:19,076 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 313789711, now seen corresponding path program 2 times [2023-12-05 21:12:19,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:19,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429664842] [2023-12-05 21:12:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:19,391 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 21:12:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429664842] [2023-12-05 21:12:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429664842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406101197] [2023-12-05 21:12:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:12:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:19,394 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 21:12:19,407 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 21:12:19,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:12:19,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:12:19,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-05 21:12:19,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:12:19,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:12:19,934 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 21:12:19,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:12:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406101197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:19,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:12:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 23 [2023-12-05 21:12:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765332051] [2023-12-05 21:12:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:19,936 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-05 21:12:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-05 21:12:19,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:19,938 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 100 [2023-12-05 21:12:19,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 59.75) internal successors, (478), 8 states have internal predecessors, (478), 0 states have call successors, (0), 0 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 21:12:19,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:19,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 100 [2023-12-05 21:12:19,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:20,198 INFO L124 PetriNetUnfolderBase]: 308/982 cut-off events. [2023-12-05 21:12:20,198 INFO L125 PetriNetUnfolderBase]: For 3120/3162 co-relation queries the response was YES. [2023-12-05 21:12:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 982 events. 308/982 cut-off events. For 3120/3162 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5991 event pairs, 95 based on Foata normal form. 79/1023 useless extension candidates. Maximal degree in co-relation 2997. Up to 400 conditions per place. [2023-12-05 21:12:20,207 INFO L140 encePairwiseOnDemand]: 88/100 looper letters, 88 selfloop transitions, 10 changer transitions 0/182 dead transitions. [2023-12-05 21:12:20,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 182 transitions, 1307 flow [2023-12-05 21:12:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2023-12-05 21:12:20,209 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6985714285714286 [2023-12-05 21:12:20,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2023-12-05 21:12:20,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2023-12-05 21:12:20,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:20,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2023-12-05 21:12:20,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 21:12:20,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 21:12:20,213 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 21:12:20,213 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 38 predicate places. [2023-12-05 21:12:20,213 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 182 transitions, 1307 flow [2023-12-05 21:12:20,214 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.75) internal successors, (478), 8 states have internal predecessors, (478), 0 states have call successors, (0), 0 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 21:12:20,214 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:20,214 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] [2023-12-05 21:12:20,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-05 21:12:20,423 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:20,423 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 313789712, now seen corresponding path program 1 times [2023-12-05 21:12:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146132049] [2023-12-05 21:12:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:20,695 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 21:12:20,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146132049] [2023-12-05 21:12:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146132049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110977451] [2023-12-05 21:12:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:20,702 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 21:12:20,705 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 21:12:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:20,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:12:20,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:20,888 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 21:12:20,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:21,071 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 21:12:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110977451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:21,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:21,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:12:21,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399737307] [2023-12-05 21:12:21,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:21,073 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:12:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:12:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:21,076 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 100 [2023-12-05 21:12:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 182 transitions, 1307 flow. Second operand has 23 states, 23 states have (on average 82.52173913043478) internal successors, (1898), 23 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 21:12:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 100 [2023-12-05 21:12:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:21,518 INFO L124 PetriNetUnfolderBase]: 330/996 cut-off events. [2023-12-05 21:12:21,519 INFO L125 PetriNetUnfolderBase]: For 4604/4774 co-relation queries the response was YES. [2023-12-05 21:12:21,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3545 conditions, 996 events. 330/996 cut-off events. For 4604/4774 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5813 event pairs, 105 based on Foata normal form. 3/958 useless extension candidates. Maximal degree in co-relation 3220. Up to 399 conditions per place. [2023-12-05 21:12:21,529 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 53 selfloop transitions, 30 changer transitions 0/197 dead transitions. [2023-12-05 21:12:21,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 197 transitions, 1593 flow [2023-12-05 21:12:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:12:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:12:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2466 transitions. [2023-12-05 21:12:21,535 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.822 [2023-12-05 21:12:21,535 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2466 transitions. [2023-12-05 21:12:21,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2466 transitions. [2023-12-05 21:12:21,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:21,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2466 transitions. [2023-12-05 21:12:21,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 82.2) internal successors, (2466), 30 states have internal predecessors, (2466), 0 states have call successors, (0), 0 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 21:12:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 100.0) internal successors, (3100), 31 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 21:12:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 100.0) internal successors, (3100), 31 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 21:12:21,553 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 67 predicate places. [2023-12-05 21:12:21,553 INFO L500 AbstractCegarLoop]: Abstraction has has 164 places, 197 transitions, 1593 flow [2023-12-05 21:12:21,554 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 82.52173913043478) internal successors, (1898), 23 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 21:12:21,554 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:21,554 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] [2023-12-05 21:12:21,567 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 21:12:21,760 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:21,761 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:21,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1306034964, now seen corresponding path program 2 times [2023-12-05 21:12:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315137455] [2023-12-05 21:12:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:21,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:22,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315137455] [2023-12-05 21:12:22,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315137455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:22,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:22,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-05 21:12:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801761224] [2023-12-05 21:12:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:22,062 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:12:22,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:12:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:12:22,063 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 100 [2023-12-05 21:12:22,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 197 transitions, 1593 flow. Second operand has 10 states, 10 states have (on average 50.7) internal successors, (507), 10 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 21:12:22,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:22,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 100 [2023-12-05 21:12:22,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:22,623 INFO L124 PetriNetUnfolderBase]: 752/2250 cut-off events. [2023-12-05 21:12:22,623 INFO L125 PetriNetUnfolderBase]: For 11476/11670 co-relation queries the response was YES. [2023-12-05 21:12:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8618 conditions, 2250 events. 752/2250 cut-off events. For 11476/11670 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 15494 event pairs, 255 based on Foata normal form. 155/2312 useless extension candidates. Maximal degree in co-relation 8274. Up to 788 conditions per place. [2023-12-05 21:12:22,648 INFO L140 encePairwiseOnDemand]: 84/100 looper letters, 177 selfloop transitions, 24 changer transitions 1/294 dead transitions. [2023-12-05 21:12:22,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 294 transitions, 2863 flow [2023-12-05 21:12:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-05 21:12:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-12-05 21:12:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 733 transitions. [2023-12-05 21:12:22,651 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6108333333333333 [2023-12-05 21:12:22,651 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 733 transitions. [2023-12-05 21:12:22,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 733 transitions. [2023-12-05 21:12:22,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:22,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 733 transitions. [2023-12-05 21:12:22,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.083333333333336) internal successors, (733), 12 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 21:12:22,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 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 21:12:22,656 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 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 21:12:22,657 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 76 predicate places. [2023-12-05 21:12:22,657 INFO L500 AbstractCegarLoop]: Abstraction has has 173 places, 294 transitions, 2863 flow [2023-12-05 21:12:22,657 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 50.7) internal successors, (507), 10 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 21:12:22,657 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:22,658 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] [2023-12-05 21:12:22,658 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:12:22,658 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:22,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1309588448, now seen corresponding path program 1 times [2023-12-05 21:12:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672683363] [2023-12-05 21:12:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:22,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:22,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:22,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672683363] [2023-12-05 21:12:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672683363] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:22,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:22,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-05 21:12:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554547283] [2023-12-05 21:12:22,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:22,974 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:12:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:12:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:12:22,976 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 100 [2023-12-05 21:12:22,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 294 transitions, 2863 flow. Second operand has 10 states, 10 states have (on average 50.7) internal successors, (507), 10 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 21:12:22,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:22,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 100 [2023-12-05 21:12:22,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:23,557 INFO L124 PetriNetUnfolderBase]: 853/2340 cut-off events. [2023-12-05 21:12:23,557 INFO L125 PetriNetUnfolderBase]: For 17138/17367 co-relation queries the response was YES. [2023-12-05 21:12:23,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 2340 events. 853/2340 cut-off events. For 17138/17367 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16068 event pairs, 235 based on Foata normal form. 83/2333 useless extension candidates. Maximal degree in co-relation 10133. Up to 815 conditions per place. [2023-12-05 21:12:23,583 INFO L140 encePairwiseOnDemand]: 87/100 looper letters, 206 selfloop transitions, 19 changer transitions 1/348 dead transitions. [2023-12-05 21:12:23,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 348 transitions, 3841 flow [2023-12-05 21:12:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:12:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:12:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 527 transitions. [2023-12-05 21:12:23,585 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5855555555555556 [2023-12-05 21:12:23,585 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 527 transitions. [2023-12-05 21:12:23,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 527 transitions. [2023-12-05 21:12:23,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:23,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 527 transitions. [2023-12-05 21:12:23,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.55555555555556) internal successors, (527), 9 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 21:12:23,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:12:23,590 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:12:23,591 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 84 predicate places. [2023-12-05 21:12:23,591 INFO L500 AbstractCegarLoop]: Abstraction has has 181 places, 348 transitions, 3841 flow [2023-12-05 21:12:23,591 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 50.7) internal successors, (507), 10 states have internal predecessors, (507), 0 states have call successors, (0), 0 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 21:12:23,591 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:23,591 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] [2023-12-05 21:12:23,592 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:12:23,592 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:23,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1309588449, now seen corresponding path program 1 times [2023-12-05 21:12:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:23,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025955605] [2023-12-05 21:12:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025955605] [2023-12-05 21:12:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025955605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:23,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-05 21:12:23,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830165382] [2023-12-05 21:12:23,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:23,820 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-05 21:12:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-05 21:12:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-05 21:12:23,822 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 100 [2023-12-05 21:12:23,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 348 transitions, 3841 flow. Second operand has 9 states, 9 states have (on average 55.666666666666664) internal successors, (501), 9 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 21:12:23,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:23,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 100 [2023-12-05 21:12:23,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:24,325 INFO L124 PetriNetUnfolderBase]: 793/2273 cut-off events. [2023-12-05 21:12:24,325 INFO L125 PetriNetUnfolderBase]: For 20107/20388 co-relation queries the response was YES. [2023-12-05 21:12:24,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2273 events. 793/2273 cut-off events. For 20107/20388 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 15174 event pairs, 231 based on Foata normal form. 126/2284 useless extension candidates. Maximal degree in co-relation 10644. Up to 786 conditions per place. [2023-12-05 21:12:24,358 INFO L140 encePairwiseOnDemand]: 89/100 looper letters, 195 selfloop transitions, 26 changer transitions 1/356 dead transitions. [2023-12-05 21:12:24,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 356 transitions, 4491 flow [2023-12-05 21:12:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:12:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:12:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 486 transitions. [2023-12-05 21:12:24,362 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6075 [2023-12-05 21:12:24,362 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 486 transitions. [2023-12-05 21:12:24,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 486 transitions. [2023-12-05 21:12:24,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:24,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 486 transitions. [2023-12-05 21:12:24,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.75) internal successors, (486), 8 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 21:12:24,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 100.0) internal successors, (900), 9 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 21:12:24,365 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 100.0) internal successors, (900), 9 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 21:12:24,365 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 89 predicate places. [2023-12-05 21:12:24,365 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 356 transitions, 4491 flow [2023-12-05 21:12:24,366 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.666666666666664) internal successors, (501), 9 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 21:12:24,366 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:24,366 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 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] [2023-12-05 21:12:24,366 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:12:24,366 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:24,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash -612077188, now seen corresponding path program 1 times [2023-12-05 21:12:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:24,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306209456] [2023-12-05 21:12:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:24,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:24,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:24,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306209456] [2023-12-05 21:12:24,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306209456] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:24,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052126865] [2023-12-05 21:12:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:24,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:24,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:24,928 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 21:12:24,954 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 21:12:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:25,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-05 21:12:25,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:12:25,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:12:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:25,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:26,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-12-05 21:12:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052126865] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:26,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:26,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2023-12-05 21:12:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493351714] [2023-12-05 21:12:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:26,732 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-05 21:12:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-05 21:12:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-12-05 21:12:26,736 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-12-05 21:12:26,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 356 transitions, 4491 flow. Second operand has 32 states, 32 states have (on average 50.75) internal successors, (1624), 32 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 21:12:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-12-05 21:12:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:29,038 INFO L124 PetriNetUnfolderBase]: 1433/3956 cut-off events. [2023-12-05 21:12:29,038 INFO L125 PetriNetUnfolderBase]: For 44368/45185 co-relation queries the response was YES. [2023-12-05 21:12:29,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22500 conditions, 3956 events. 1433/3956 cut-off events. For 44368/45185 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 27836 event pairs, 279 based on Foata normal form. 263/4061 useless extension candidates. Maximal degree in co-relation 22097. Up to 1865 conditions per place. [2023-12-05 21:12:29,088 INFO L140 encePairwiseOnDemand]: 83/100 looper letters, 501 selfloop transitions, 97 changer transitions 1/688 dead transitions. [2023-12-05 21:12:29,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 688 transitions, 10807 flow [2023-12-05 21:12:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-05 21:12:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-12-05 21:12:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1991 transitions. [2023-12-05 21:12:29,092 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5855882352941176 [2023-12-05 21:12:29,093 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1991 transitions. [2023-12-05 21:12:29,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1991 transitions. [2023-12-05 21:12:29,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:29,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1991 transitions. [2023-12-05 21:12:29,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 58.55882352941177) internal successors, (1991), 34 states have internal predecessors, (1991), 0 states have call successors, (0), 0 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 21:12:29,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 100.0) internal successors, (3500), 35 states have internal predecessors, (3500), 0 states have call successors, (0), 0 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 21:12:29,105 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 100.0) internal successors, (3500), 35 states have internal predecessors, (3500), 0 states have call successors, (0), 0 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 21:12:29,105 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 121 predicate places. [2023-12-05 21:12:29,105 INFO L500 AbstractCegarLoop]: Abstraction has has 218 places, 688 transitions, 10807 flow [2023-12-05 21:12:29,106 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.75) internal successors, (1624), 32 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 21:12:29,106 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:29,106 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 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] [2023-12-05 21:12:29,118 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 21:12:29,318 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-05 21:12:29,319 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:29,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1013658009, now seen corresponding path program 1 times [2023-12-05 21:12:29,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:29,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689607826] [2023-12-05 21:12:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:29,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689607826] [2023-12-05 21:12:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689607826] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358535475] [2023-12-05 21:12:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:29,828 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 21:12:29,852 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 21:12:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:29,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-05 21:12:29,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:12:30,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:12:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:30,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:31,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-12-05 21:12:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:31,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358535475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:31,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2023-12-05 21:12:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311644997] [2023-12-05 21:12:31,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:31,488 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-05 21:12:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-05 21:12:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-12-05 21:12:31,491 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-12-05 21:12:31,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 688 transitions, 10807 flow. Second operand has 32 states, 32 states have (on average 50.75) internal successors, (1624), 32 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 21:12:31,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:31,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-12-05 21:12:31,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:33,613 INFO L124 PetriNetUnfolderBase]: 2301/6190 cut-off events. [2023-12-05 21:12:33,613 INFO L125 PetriNetUnfolderBase]: For 91726/94436 co-relation queries the response was YES. [2023-12-05 21:12:33,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39368 conditions, 6190 events. 2301/6190 cut-off events. For 91726/94436 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 45907 event pairs, 402 based on Foata normal form. 411/6333 useless extension candidates. Maximal degree in co-relation 38945. Up to 2879 conditions per place. [2023-12-05 21:12:33,689 INFO L140 encePairwiseOnDemand]: 83/100 looper letters, 814 selfloop transitions, 105 changer transitions 1/1090 dead transitions. [2023-12-05 21:12:33,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1090 transitions, 20241 flow [2023-12-05 21:12:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-05 21:12:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-12-05 21:12:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1134 transitions. [2023-12-05 21:12:33,692 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.567 [2023-12-05 21:12:33,692 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1134 transitions. [2023-12-05 21:12:33,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1134 transitions. [2023-12-05 21:12:33,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:33,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1134 transitions. [2023-12-05 21:12:33,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.7) internal successors, (1134), 20 states have internal predecessors, (1134), 0 states have call successors, (0), 0 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 21:12:33,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 100.0) internal successors, (2100), 21 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 21:12:33,698 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 100.0) internal successors, (2100), 21 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 21:12:33,698 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 139 predicate places. [2023-12-05 21:12:33,698 INFO L500 AbstractCegarLoop]: Abstraction has has 236 places, 1090 transitions, 20241 flow [2023-12-05 21:12:33,699 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.75) internal successors, (1624), 32 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 21:12:33,699 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:33,699 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-05 21:12:33,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-05 21:12:33,904 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:33,905 INFO L425 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:33,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1438822756, now seen corresponding path program 2 times [2023-12-05 21:12:33,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:33,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249265391] [2023-12-05 21:12:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249265391] [2023-12-05 21:12:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249265391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021496086] [2023-12-05 21:12:34,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:12:34,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:34,929 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 21:12:34,939 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 21:12:35,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:12:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:12:35,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-05 21:12:35,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:12:35,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:12:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:36,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:37,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-12-05 21:12:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 52 proven. 23 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:37,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021496086] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:37,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:37,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 47 [2023-12-05 21:12:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70895880] [2023-12-05 21:12:37,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:37,584 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-05 21:12:37,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-05 21:12:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2023-12-05 21:12:37,587 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-12-05 21:12:37,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1090 transitions, 20241 flow. Second operand has 48 states, 48 states have (on average 51.458333333333336) internal successors, (2470), 48 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 21:12:37,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:37,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-12-05 21:12:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:42,843 INFO L124 PetriNetUnfolderBase]: 2765/7331 cut-off events. [2023-12-05 21:12:42,844 INFO L125 PetriNetUnfolderBase]: For 123916/127914 co-relation queries the response was YES. [2023-12-05 21:12:42,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52429 conditions, 7331 events. 2765/7331 cut-off events. For 123916/127914 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 55736 event pairs, 278 based on Foata normal form. 582/7631 useless extension candidates. Maximal degree in co-relation 51987. Up to 3701 conditions per place. [2023-12-05 21:12:42,920 INFO L140 encePairwiseOnDemand]: 84/100 looper letters, 1196 selfloop transitions, 204 changer transitions 1/1506 dead transitions. [2023-12-05 21:12:42,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1506 transitions, 31697 flow [2023-12-05 21:12:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-05 21:12:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-12-05 21:12:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3195 transitions. [2023-12-05 21:12:42,926 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5705357142857143 [2023-12-05 21:12:42,926 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3195 transitions. [2023-12-05 21:12:42,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3195 transitions. [2023-12-05 21:12:42,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:42,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3195 transitions. [2023-12-05 21:12:42,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 57.05357142857143) internal successors, (3195), 56 states have internal predecessors, (3195), 0 states have call successors, (0), 0 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 21:12:42,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 100.0) internal successors, (5700), 57 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 21:12:42,941 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 100.0) internal successors, (5700), 57 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 21:12:42,942 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 193 predicate places. [2023-12-05 21:12:42,942 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 1506 transitions, 31697 flow [2023-12-05 21:12:42,943 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.458333333333336) internal successors, (2470), 48 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 21:12:42,943 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:42,943 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-05 21:12:42,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-05 21:12:43,152 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:43,153 INFO L425 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:43,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash -585291851, now seen corresponding path program 2 times [2023-12-05 21:12:43,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:43,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104585554] [2023-12-05 21:12:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:44,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:44,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104585554] [2023-12-05 21:12:44,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104585554] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:44,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545528842] [2023-12-05 21:12:44,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:12:44,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:44,005 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 21:12:44,030 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 21:12:44,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:12:44,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:12:44,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-05 21:12:44,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:12:44,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:12:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:45,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:46,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-12-05 21:12:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 52 proven. 23 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545528842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:46,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 47 [2023-12-05 21:12:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497798850] [2023-12-05 21:12:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:46,600 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-05 21:12:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-05 21:12:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2023-12-05 21:12:46,604 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-12-05 21:12:46,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1506 transitions, 31697 flow. Second operand has 48 states, 48 states have (on average 51.458333333333336) internal successors, (2470), 48 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 21:12:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-12-05 21:12:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:50,889 INFO L124 PetriNetUnfolderBase]: 3230/8744 cut-off events. [2023-12-05 21:12:50,890 INFO L125 PetriNetUnfolderBase]: For 166566/171536 co-relation queries the response was YES. [2023-12-05 21:12:50,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67219 conditions, 8744 events. 3230/8744 cut-off events. For 166566/171536 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 67883 event pairs, 225 based on Foata normal form. 711/9141 useless extension candidates. Maximal degree in co-relation 66757. Up to 4304 conditions per place. [2023-12-05 21:12:50,980 INFO L140 encePairwiseOnDemand]: 83/100 looper letters, 1500 selfloop transitions, 231 changer transitions 1/1926 dead transitions. [2023-12-05 21:12:50,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1926 transitions, 45035 flow [2023-12-05 21:12:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-05 21:12:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-12-05 21:12:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1762 transitions. [2023-12-05 21:12:50,984 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.550625 [2023-12-05 21:12:50,984 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1762 transitions. [2023-12-05 21:12:50,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1762 transitions. [2023-12-05 21:12:50,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:50,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1762 transitions. [2023-12-05 21:12:50,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.0625) internal successors, (1762), 32 states have internal predecessors, (1762), 0 states have call successors, (0), 0 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 21:12:50,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 100.0) internal successors, (3300), 33 states have internal predecessors, (3300), 0 states have call successors, (0), 0 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 21:12:50,993 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 100.0) internal successors, (3300), 33 states have internal predecessors, (3300), 0 states have call successors, (0), 0 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 21:12:50,993 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 223 predicate places. [2023-12-05 21:12:50,994 INFO L500 AbstractCegarLoop]: Abstraction has has 320 places, 1926 transitions, 45035 flow [2023-12-05 21:12:50,994 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.458333333333336) internal successors, (2470), 48 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 21:12:50,994 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:50,995 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:51,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-05 21:12:51,207 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,SelfDestructingSolverStorable14 [2023-12-05 21:12:51,207 INFO L425 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:51,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1541767648, now seen corresponding path program 1 times [2023-12-05 21:12:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:51,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851861559] [2023-12-05 21:12:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851861559] [2023-12-05 21:12:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851861559] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344942149] [2023-12-05 21:12:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:51,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:51,414 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 21:12:51,422 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 21:12:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:51,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-05 21:12:51,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:51,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344942149] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:51,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:51,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-12-05 21:12:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324550806] [2023-12-05 21:12:51,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:51,830 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-05 21:12:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-05 21:12:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2023-12-05 21:12:51,833 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 100 [2023-12-05 21:12:51,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1926 transitions, 45035 flow. Second operand has 22 states, 22 states have (on average 83.31818181818181) internal successors, (1833), 22 states have internal predecessors, (1833), 0 states have call successors, (0), 0 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 21:12:51,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:51,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 100 [2023-12-05 21:12:51,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:57,798 INFO L124 PetriNetUnfolderBase]: 5412/14557 cut-off events. [2023-12-05 21:12:57,798 INFO L125 PetriNetUnfolderBase]: For 298263/305444 co-relation queries the response was YES. [2023-12-05 21:12:57,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117154 conditions, 14557 events. 5412/14557 cut-off events. For 298263/305444 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 116186 event pairs, 369 based on Foata normal form. 384/14470 useless extension candidates. Maximal degree in co-relation 116688. Up to 8134 conditions per place. [2023-12-05 21:12:57,923 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 1465 selfloop transitions, 27 changer transitions 1/2580 dead transitions. [2023-12-05 21:12:57,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2580 transitions, 67187 flow [2023-12-05 21:12:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-05 21:12:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-12-05 21:12:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2289 transitions. [2023-12-05 21:12:57,935 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8477777777777777 [2023-12-05 21:12:57,935 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2289 transitions. [2023-12-05 21:12:57,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2289 transitions. [2023-12-05 21:12:57,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:57,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2289 transitions. [2023-12-05 21:12:57,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 84.77777777777777) internal successors, (2289), 27 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:57,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 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 21:12:57,951 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 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 21:12:57,951 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 249 predicate places. [2023-12-05 21:12:57,951 INFO L500 AbstractCegarLoop]: Abstraction has has 346 places, 2580 transitions, 67187 flow [2023-12-05 21:12:57,952 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.31818181818181) internal successors, (1833), 22 states have internal predecessors, (1833), 0 states have call successors, (0), 0 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 21:12:57,952 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:57,952 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:57,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-05 21:12:58,158 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,SelfDestructingSolverStorable15 [2023-12-05 21:12:58,158 INFO L425 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:12:58,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash -792018525, now seen corresponding path program 2 times [2023-12-05 21:12:58,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:58,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696345229] [2023-12-05 21:12:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696345229] [2023-12-05 21:12:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696345229] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:12:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169997446] [2023-12-05 21:12:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:12:58,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:12:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:58,690 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 21:12:58,713 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 21:12:58,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:12:58,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:12:58,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-05 21:12:58,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:12:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:59,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:12:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:12:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169997446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:12:59,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:12:59,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2023-12-05 21:12:59,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780158623] [2023-12-05 21:12:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:12:59,411 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:12:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:12:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:59,414 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 100 [2023-12-05 21:12:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 2580 transitions, 67187 flow. Second operand has 23 states, 23 states have (on average 83.43478260869566) internal successors, (1919), 23 states have internal predecessors, (1919), 0 states have call successors, (0), 0 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 21:12:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 100 [2023-12-05 21:12:59,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:07,851 INFO L124 PetriNetUnfolderBase]: 5953/15927 cut-off events. [2023-12-05 21:13:07,851 INFO L125 PetriNetUnfolderBase]: For 360425/368751 co-relation queries the response was YES. [2023-12-05 21:13:07,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133949 conditions, 15927 events. 5953/15927 cut-off events. For 360425/368751 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 127782 event pairs, 410 based on Foata normal form. 361/15772 useless extension candidates. Maximal degree in co-relation 133479. Up to 9105 conditions per place. [2023-12-05 21:13:07,990 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 1620 selfloop transitions, 30 changer transitions 1/2738 dead transitions. [2023-12-05 21:13:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2738 transitions, 75431 flow [2023-12-05 21:13:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:13:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:13:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2538 transitions. [2023-12-05 21:13:07,994 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.846 [2023-12-05 21:13:07,994 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2538 transitions. [2023-12-05 21:13:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2538 transitions. [2023-12-05 21:13:07,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:07,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2538 transitions. [2023-12-05 21:13:07,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 84.6) internal successors, (2538), 30 states have internal predecessors, (2538), 0 states have call successors, (0), 0 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 21:13:08,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 100.0) internal successors, (3100), 31 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 21:13:08,002 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 100.0) internal successors, (3100), 31 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 21:13:08,002 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 278 predicate places. [2023-12-05 21:13:08,002 INFO L500 AbstractCegarLoop]: Abstraction has has 375 places, 2738 transitions, 75431 flow [2023-12-05 21:13:08,003 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 83.43478260869566) internal successors, (1919), 23 states have internal predecessors, (1919), 0 states have call successors, (0), 0 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 21:13:08,003 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:08,003 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-12-05 21:13:08,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-05 21:13:08,209 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,SelfDestructingSolverStorable16 [2023-12-05 21:13:08,209 INFO L425 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:13:08,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1672430604, now seen corresponding path program 3 times [2023-12-05 21:13:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686565976] [2023-12-05 21:13:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2023-12-05 21:13:08,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:08,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686565976] [2023-12-05 21:13:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686565976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:08,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98366080] [2023-12-05 21:13:08,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-05 21:13:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:08,780 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 21:13:08,800 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 21:13:21,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-05 21:13:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:13:21,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-05 21:13:21,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:13:22,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:13:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 136 proven. 16 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2023-12-05 21:13:22,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:13:22,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:13:22,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-12-05 21:13:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2023-12-05 21:13:23,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98366080] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:23,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-05 21:13:23,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 10] total 22 [2023-12-05 21:13:23,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159562759] [2023-12-05 21:13:23,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:23,372 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-05 21:13:23,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-05 21:13:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:13:23,374 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 100 [2023-12-05 21:13:23,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 2738 transitions, 75431 flow. Second operand has 9 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 21:13:23,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:23,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 100 [2023-12-05 21:13:23,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:31,533 INFO L124 PetriNetUnfolderBase]: 5993/16158 cut-off events. [2023-12-05 21:13:31,533 INFO L125 PetriNetUnfolderBase]: For 428965/437221 co-relation queries the response was YES. [2023-12-05 21:13:31,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144500 conditions, 16158 events. 5993/16158 cut-off events. For 428965/437221 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 129435 event pairs, 411 based on Foata normal form. 333/15983 useless extension candidates. Maximal degree in co-relation 144010. Up to 9241 conditions per place. [2023-12-05 21:13:31,688 INFO L140 encePairwiseOnDemand]: 87/100 looper letters, 2360 selfloop transitions, 381 changer transitions 1/2919 dead transitions. [2023-12-05 21:13:31,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 2919 transitions, 86317 flow [2023-12-05 21:13:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:13:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:13:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 570 transitions. [2023-12-05 21:13:31,689 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-12-05 21:13:31,689 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 570 transitions. [2023-12-05 21:13:31,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 570 transitions. [2023-12-05 21:13:31,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:31,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 570 transitions. [2023-12-05 21:13:31,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.333333333333336) internal successors, (570), 9 states have internal predecessors, (570), 0 states have call successors, (0), 0 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 21:13:31,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:13:31,691 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 21:13:31,692 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 285 predicate places. [2023-12-05 21:13:31,692 INFO L500 AbstractCegarLoop]: Abstraction has has 382 places, 2919 transitions, 86317 flow [2023-12-05 21:13:31,692 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 21:13:31,692 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:31,692 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-12-05 21:13:31,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-05 21:13:31,892 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,SelfDestructingSolverStorable17 [2023-12-05 21:13:31,893 INFO L425 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:13:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash -404704794, now seen corresponding path program 4 times [2023-12-05 21:13:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:31,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430191711] [2023-12-05 21:13:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2023-12-05 21:13:32,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430191711] [2023-12-05 21:13:32,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430191711] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588355413] [2023-12-05 21:13:32,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-05 21:13:32,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:32,412 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:13:32,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-05 21:13:33,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-05 21:13:33,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:13:33,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:13:33,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:13:34,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:13:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 122 proven. 154 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-12-05 21:13:34,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:13:34,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:13:34,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-12-05 21:13:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 122 proven. 154 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-12-05 21:13:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588355413] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:13:35,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:13:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-12-05 21:13:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676171264] [2023-12-05 21:13:35,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:13:35,306 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:13:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:13:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:13:35,308 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 100 [2023-12-05 21:13:35,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 2919 transitions, 86317 flow. Second operand has 24 states, 24 states have (on average 52.541666666666664) internal successors, (1261), 24 states have internal predecessors, (1261), 0 states have call successors, (0), 0 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 21:13:35,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:35,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 100 [2023-12-05 21:13:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:51,092 INFO L124 PetriNetUnfolderBase]: 10063/26570 cut-off events. [2023-12-05 21:13:51,093 INFO L125 PetriNetUnfolderBase]: For 766583/775303 co-relation queries the response was YES. [2023-12-05 21:13:51,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248737 conditions, 26570 events. 10063/26570 cut-off events. For 766583/775303 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 225912 event pairs, 209 based on Foata normal form. 798/27023 useless extension candidates. Maximal degree in co-relation 248227. Up to 14991 conditions per place. [2023-12-05 21:13:51,383 INFO L140 encePairwiseOnDemand]: 83/100 looper letters, 3480 selfloop transitions, 1023 changer transitions 1/4661 dead transitions. [2023-12-05 21:13:51,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 4661 transitions, 148199 flow [2023-12-05 21:13:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-05 21:13:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-12-05 21:13:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1476 transitions. [2023-12-05 21:13:51,386 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2023-12-05 21:13:51,386 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1476 transitions. [2023-12-05 21:13:51,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1476 transitions. [2023-12-05 21:13:51,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:51,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1476 transitions. [2023-12-05 21:13:51,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 54.666666666666664) internal successors, (1476), 27 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 21:13:51,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 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 21:13:51,392 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 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 21:13:51,393 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 311 predicate places. [2023-12-05 21:13:51,393 INFO L500 AbstractCegarLoop]: Abstraction has has 408 places, 4661 transitions, 148199 flow [2023-12-05 21:13:51,393 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.541666666666664) internal successors, (1261), 24 states have internal predecessors, (1261), 0 states have call successors, (0), 0 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 21:13:51,393 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:51,393 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-12-05 21:13:51,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-05 21:13:51,602 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:51,603 INFO L425 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:13:51,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2815852, now seen corresponding path program 1 times [2023-12-05 21:13:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:51,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518240932] [2023-12-05 21:13:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-05 21:13:52,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:52,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518240932] [2023-12-05 21:13:52,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518240932] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:52,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244214088] [2023-12-05 21:13:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:52,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:52,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:52,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:13:52,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-05 21:13:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:52,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-05 21:13:52,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:13:53,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:13:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2023-12-05 21:13:53,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:13:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244214088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:53,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:13:53,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-05 21:13:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447342427] [2023-12-05 21:13:53,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:53,172 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-05 21:13:53,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-05 21:13:53,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-12-05 21:13:53,173 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 100 [2023-12-05 21:13:53,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 4661 transitions, 148199 flow. Second operand has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:13:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 100 [2023-12-05 21:13:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:17,578 INFO L124 PetriNetUnfolderBase]: 10406/27784 cut-off events. [2023-12-05 21:14:17,579 INFO L125 PetriNetUnfolderBase]: For 915815/923931 co-relation queries the response was YES. [2023-12-05 21:14:17,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275676 conditions, 27784 events. 10406/27784 cut-off events. For 915815/923931 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 238771 event pairs, 200 based on Foata normal form. 233/27675 useless extension candidates. Maximal degree in co-relation 275146. Up to 15342 conditions per place. [2023-12-05 21:14:17,888 INFO L140 encePairwiseOnDemand]: 89/100 looper letters, 4513 selfloop transitions, 355 changer transitions 1/5104 dead transitions. [2023-12-05 21:14:17,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 5104 transitions, 170691 flow [2023-12-05 21:14:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:14:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:14:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 629 transitions. [2023-12-05 21:14:17,893 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.629 [2023-12-05 21:14:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 629 transitions. [2023-12-05 21:14:17,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 629 transitions. [2023-12-05 21:14:17,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:17,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 629 transitions. [2023-12-05 21:14:17,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 62.9) internal successors, (629), 10 states have internal predecessors, (629), 0 states have call successors, (0), 0 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 21:14:17,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 21:14:17,895 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 21:14:17,896 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 320 predicate places. [2023-12-05 21:14:17,896 INFO L500 AbstractCegarLoop]: Abstraction has has 417 places, 5104 transitions, 170691 flow [2023-12-05 21:14:17,896 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:14:17,896 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:17,896 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-12-05 21:14:17,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:18,102 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-05 21:14:18,103 INFO L425 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:14:18,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 178959872, now seen corresponding path program 2 times [2023-12-05 21:14:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641572241] [2023-12-05 21:14:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-05 21:14:18,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:18,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641572241] [2023-12-05 21:14:18,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641572241] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:18,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122591821] [2023-12-05 21:14:18,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:14:18,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:18,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:14:18,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-05 21:14:18,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:14:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:14:18,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-05 21:14:18,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:14:19,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:14:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2023-12-05 21:14:19,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:14:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122591821] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:19,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:14:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-05 21:14:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148124195] [2023-12-05 21:14:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:19,353 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-05 21:14:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-05 21:14:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-05 21:14:19,354 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 100 [2023-12-05 21:14:19,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 5104 transitions, 170691 flow. Second operand has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:14:19,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:19,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 100 [2023-12-05 21:14:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:46,753 INFO L124 PetriNetUnfolderBase]: 10729/29010 cut-off events. [2023-12-05 21:14:46,753 INFO L125 PetriNetUnfolderBase]: For 1091506/1100702 co-relation queries the response was YES. [2023-12-05 21:14:46,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303814 conditions, 29010 events. 10729/29010 cut-off events. For 1091506/1100702 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 252622 event pairs, 209 based on Foata normal form. 229/28892 useless extension candidates. Maximal degree in co-relation 303264. Up to 15592 conditions per place. [2023-12-05 21:14:47,103 INFO L140 encePairwiseOnDemand]: 90/100 looper letters, 5108 selfloop transitions, 258 changer transitions 1/5602 dead transitions. [2023-12-05 21:14:47,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 5602 transitions, 196555 flow [2023-12-05 21:14:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:14:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:14:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 617 transitions. [2023-12-05 21:14:47,104 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.617 [2023-12-05 21:14:47,104 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 617 transitions. [2023-12-05 21:14:47,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 617 transitions. [2023-12-05 21:14:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:47,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 617 transitions. [2023-12-05 21:14:47,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.7) internal successors, (617), 10 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 21:14:47,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 21:14:47,107 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 21:14:47,107 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 329 predicate places. [2023-12-05 21:14:47,107 INFO L500 AbstractCegarLoop]: Abstraction has has 426 places, 5602 transitions, 196555 flow [2023-12-05 21:14:47,108 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:14:47,108 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:47,108 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2023-12-05 21:14:47,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:47,316 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:47,317 INFO L425 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-12-05 21:14:47,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2057577968, now seen corresponding path program 3 times [2023-12-05 21:14:47,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108764115] [2023-12-05 21:14:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-05 21:14:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108764115] [2023-12-05 21:14:47,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108764115] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177302443] [2023-12-05 21:14:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-05 21:14:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:47,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:14:48,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-05 21:14:48,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-05 21:14:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:14:48,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-05 21:14:48,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:14:48,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:14:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2023-12-05 21:14:48,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:14:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177302443] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:48,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:14:48,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-05 21:14:48,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863704932] [2023-12-05 21:14:48,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:48,744 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-05 21:14:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-05 21:14:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-12-05 21:14:48,745 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 100 [2023-12-05 21:14:48,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 5602 transitions, 196555 flow. Second operand has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:14:48,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:48,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 100 [2023-12-05 21:14:48,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:15:19,558 INFO L124 PetriNetUnfolderBase]: 10728/28965 cut-off events. [2023-12-05 21:15:19,558 INFO L125 PetriNetUnfolderBase]: For 1232731/1242807 co-relation queries the response was YES. [2023-12-05 21:15:19,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319235 conditions, 28965 events. 10728/28965 cut-off events. For 1232731/1242807 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 252393 event pairs, 196 based on Foata normal form. 231/28855 useless extension candidates. Maximal degree in co-relation 318665. Up to 15591 conditions per place. [2023-12-05 21:15:19,771 INFO L140 encePairwiseOnDemand]: 90/100 looper letters, 0 selfloop transitions, 0 changer transitions 5597/5597 dead transitions. [2023-12-05 21:15:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 5597 transitions, 207167 flow [2023-12-05 21:15:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-05 21:15:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-12-05 21:15:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 670 transitions. [2023-12-05 21:15:19,772 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2023-12-05 21:15:19,772 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 670 transitions. [2023-12-05 21:15:19,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 670 transitions. [2023-12-05 21:15:19,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:15:19,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 670 transitions. [2023-12-05 21:15:19,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.90909090909091) internal successors, (670), 11 states have internal predecessors, (670), 0 states have call successors, (0), 0 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 21:15:19,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 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 21:15:19,775 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 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 21:15:19,775 INFO L308 CegarLoopForPetriNet]: 97 programPoint places, 338 predicate places. [2023-12-05 21:15:19,775 INFO L500 AbstractCegarLoop]: Abstraction has has 435 places, 5597 transitions, 207167 flow [2023-12-05 21:15:19,776 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 56.888888888888886) internal successors, (512), 9 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 21:15:19,782 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/06-symbeq_05-funloop_hard2.i_BEv2_AllErrorsAtOnce [2023-12-05 21:15:19,867 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2023-12-05 21:15:19,868 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2023-12-05 21:15:19,869 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 19 remaining) [2023-12-05 21:15:19,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-05 21:15:20,075 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:15:20,076 INFO L457 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-05 21:15:20,080 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:15:20,080 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:15:20,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:15:20 BasicIcfg [2023-12-05 21:15:20,085 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:15:20,085 INFO L158 Benchmark]: Toolchain (without parser) took 185284.93ms. Allocated memory was 324.0MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 271.9MB in the beginning and 1.8GB in the end (delta: -1.5GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-05 21:15:20,086 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 203.4MB. Free memory is still 151.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:15:20,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 626.56ms. Allocated memory is still 324.0MB. Free memory was 271.9MB in the beginning and 243.5MB in the end (delta: 28.4MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2023-12-05 21:15:20,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.59ms. Allocated memory is still 324.0MB. Free memory was 243.5MB in the beginning and 241.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:15:20,086 INFO L158 Benchmark]: Boogie Preprocessor took 52.52ms. Allocated memory is still 324.0MB. Free memory was 241.0MB in the beginning and 239.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:15:20,087 INFO L158 Benchmark]: RCFGBuilder took 475.45ms. Allocated memory is still 324.0MB. Free memory was 239.4MB in the beginning and 221.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-05 21:15:20,087 INFO L158 Benchmark]: TraceAbstraction took 184054.40ms. Allocated memory was 324.0MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 220.5MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-05 21:15:20,088 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 203.4MB. Free memory is still 151.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 626.56ms. Allocated memory is still 324.0MB. Free memory was 271.9MB in the beginning and 243.5MB in the end (delta: 28.4MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 69.59ms. Allocated memory is still 324.0MB. Free memory was 243.5MB in the beginning and 241.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.52ms. Allocated memory is still 324.0MB. Free memory was 241.0MB in the beginning and 239.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 475.45ms. Allocated memory is still 324.0MB. Free memory was 239.4MB in the beginning and 221.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 184054.40ms. Allocated memory was 324.0MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 220.5MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. * 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 124 locations, 19 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: 183.9s, OverallIterations: 22, TraceHistogramMax: 10, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 140.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6738 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6738 mSDsluCounter, 2251 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1889 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10938 IncrementalHoareTripleChecker+Invalid, 11030 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 362 mSDtfsCounter, 10938 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4418 GetRequests, 3743 SyntacticMatches, 47 SemanticMatches, 628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7197 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207167occurred in iteration=22, InterpolantAutomatonStates: 374, 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: 0.4s SsaConstructionTime, 14.8s SatisfiabilityAnalysisTime, 23.0s InterpolantComputationTime, 5151 NumberOfCodeBlocks, 4650 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 6631 ConstructedInterpolants, 236 QuantifiedInterpolants, 57274 SizeOfPredicates, 132 NumberOfNonLiveVariables, 5075 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 48 InterpolantComputations, 12 PerfectInterpolantSequences, 17062/21065 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 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-05 21:15:20,111 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...