./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:47:05,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:47:05,943 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:47:05,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:47:05,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:47:05,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:47:05,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:47:05,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:47:05,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:47:05,982 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:47:05,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:47:05,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:47:05,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:47:05,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:47:05,986 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:47:05,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:47:05,987 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:47:05,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:47:05,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:47:05,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:47:05,988 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:47:05,988 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:47:05,989 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:47:05,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:47:05,989 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:47:05,990 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:47:05,990 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:47:05,990 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:47:05,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:47:05,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:47:05,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:47:05,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:47:05,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:47:05,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:47:05,996 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:47:05,996 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:47:05,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:47:05,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:47:05,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:47:05,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:47:05,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:47:05,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:47:05,998 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2024-10-11 17:47:06,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:47:06,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:47:06,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:47:06,285 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:47:06,286 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:47:06,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2024-10-11 17:47:07,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:47:07,958 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:47:07,960 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2024-10-11 17:47:07,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f301634e1/0659fffed0e94c9692ae307e8f7d80bd/FLAG9d342761e [2024-10-11 17:47:08,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f301634e1/0659fffed0e94c9692ae307e8f7d80bd [2024-10-11 17:47:08,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:47:08,274 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:47:08,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:47:08,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:47:08,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:47:08,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee470c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08, skipping insertion in model container [2024-10-11 17:47:08,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,323 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:47:08,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:47:08,657 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:47:08,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:47:08,731 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:47:08,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08 WrapperNode [2024-10-11 17:47:08,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:47:08,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:47:08,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:47:08,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:47:08,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,768 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2024-10-11 17:47:08,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:47:08,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:47:08,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:47:08,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:47:08,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,781 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,795 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [5, 4]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-10-11 17:47:08,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,809 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:47:08,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:47:08,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:47:08,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:47:08,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (1/1) ... [2024-10-11 17:47:08,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:47:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:08,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:47:08,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:47:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:47:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:47:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:47:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:47:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 17:47:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:47:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:47:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:47:09,039 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:47:09,041 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:47:09,266 INFO L? ?]: Removed 62 outVars from TransFormulas that were not future-live. [2024-10-11 17:47:09,267 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:47:09,319 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:47:09,319 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 17:47:09,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:47:09 BoogieIcfgContainer [2024-10-11 17:47:09,320 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:47:09,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:47:09,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:47:09,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:47:09,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:47:08" (1/3) ... [2024-10-11 17:47:09,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b58106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:47:09, skipping insertion in model container [2024-10-11 17:47:09,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:47:08" (2/3) ... [2024-10-11 17:47:09,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b58106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:47:09, skipping insertion in model container [2024-10-11 17:47:09,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:47:09" (3/3) ... [2024-10-11 17:47:09,333 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2024-10-11 17:47:09,350 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:47:09,350 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-10-11 17:47:09,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:47:09,395 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@39bf7202, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:47:09,395 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-11 17:47:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:47:09,404 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:09,404 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:47:09,405 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:09,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -396442301, now seen corresponding path program 1 times [2024-10-11 17:47:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:09,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002232332] [2024-10-11 17:47:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002232332] [2024-10-11 17:47:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002232332] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:09,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:09,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:47:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324465563] [2024-10-11 17:47:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:09,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:09,734 INFO L87 Difference]: Start difference. First operand has 41 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:09,804 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-10-11 17:47:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:47:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:09,814 INFO L225 Difference]: With dead ends: 52 [2024-10-11 17:47:09,815 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 17:47:09,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:09,820 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:09,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 94 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 17:47:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2024-10-11 17:47:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-10-11 17:47:09,847 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 6 [2024-10-11 17:47:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:09,848 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-10-11 17:47:09,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-10-11 17:47:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:47:09,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:09,849 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:47:09,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:47:09,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:09,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash -394595259, now seen corresponding path program 1 times [2024-10-11 17:47:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:09,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047772745] [2024-10-11 17:47:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:09,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047772745] [2024-10-11 17:47:10,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047772745] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:10,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:10,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:47:10,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442346026] [2024-10-11 17:47:10,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:10,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:47:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:47:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:47:10,038 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:10,084 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-10-11 17:47:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:47:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:47:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:10,086 INFO L225 Difference]: With dead ends: 41 [2024-10-11 17:47:10,086 INFO L226 Difference]: Without dead ends: 41 [2024-10-11 17:47:10,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:47:10,088 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:10,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-11 17:47:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-11 17:47:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-11 17:47:10,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 6 [2024-10-11 17:47:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:10,098 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-11 17:47:10,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-11 17:47:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:47:10,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:10,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:47:10,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:47:10,100 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:10,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -394595258, now seen corresponding path program 1 times [2024-10-11 17:47:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:10,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637450895] [2024-10-11 17:47:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637450895] [2024-10-11 17:47:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637450895] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:10,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:10,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100870156] [2024-10-11 17:47:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:10,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:47:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:47:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:47:10,425 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:10,549 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2024-10-11 17:47:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:47:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:47:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:10,550 INFO L225 Difference]: With dead ends: 43 [2024-10-11 17:47:10,550 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 17:47:10,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:10,552 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:10,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 17:47:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-11 17:47:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-10-11 17:47:10,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 6 [2024-10-11 17:47:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:10,558 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-10-11 17:47:10,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-10-11 17:47:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:47:10,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:10,559 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:10,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:47:10,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:10,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1270987503, now seen corresponding path program 1 times [2024-10-11 17:47:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063681856] [2024-10-11 17:47:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063681856] [2024-10-11 17:47:10,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063681856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:10,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:47:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863369816] [2024-10-11 17:47:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:10,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:10,621 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:10,655 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-10-11 17:47:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:47:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:10,657 INFO L225 Difference]: With dead ends: 58 [2024-10-11 17:47:10,657 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 17:47:10,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:10,658 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:10,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 17:47:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-10-11 17:47:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-10-11 17:47:10,666 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 8 [2024-10-11 17:47:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:10,669 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-10-11 17:47:10,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-10-11 17:47:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:47:10,671 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:10,671 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:10,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 17:47:10,671 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:10,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1328245805, now seen corresponding path program 1 times [2024-10-11 17:47:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:10,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776066884] [2024-10-11 17:47:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776066884] [2024-10-11 17:47:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776066884] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:10,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:47:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289947672] [2024-10-11 17:47:10,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:10,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:47:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:47:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:47:10,723 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:10,757 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-10-11 17:47:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:47:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:47:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:10,758 INFO L225 Difference]: With dead ends: 50 [2024-10-11 17:47:10,758 INFO L226 Difference]: Without dead ends: 50 [2024-10-11 17:47:10,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:47:10,761 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:10,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-11 17:47:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-11 17:47:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-11 17:47:10,770 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 8 [2024-10-11 17:47:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:10,771 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-11 17:47:10,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-11 17:47:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:47:10,772 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:10,772 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:10,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 17:47:10,773 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:10,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1328245806, now seen corresponding path program 1 times [2024-10-11 17:47:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:10,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677136778] [2024-10-11 17:47:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677136778] [2024-10-11 17:47:10,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677136778] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:10,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:10,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:47:10,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917795919] [2024-10-11 17:47:10,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:10,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:47:10,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:47:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:10,919 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:10,991 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-10-11 17:47:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:47:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:47:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:10,993 INFO L225 Difference]: With dead ends: 52 [2024-10-11 17:47:10,993 INFO L226 Difference]: Without dead ends: 52 [2024-10-11 17:47:10,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:47:10,994 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:10,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 61 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-11 17:47:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-11 17:47:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-10-11 17:47:10,998 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 8 [2024-10-11 17:47:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:10,998 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-10-11 17:47:10,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-10-11 17:47:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:47:10,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:10,999 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:10,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:47:11,000 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:11,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1248840388, now seen corresponding path program 1 times [2024-10-11 17:47:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:11,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423231431] [2024-10-11 17:47:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423231431] [2024-10-11 17:47:11,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423231431] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:11,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178707865] [2024-10-11 17:47:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:11,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:11,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:11,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:11,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:47:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:11,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 17:47:11,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:47:11,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-11 17:47:11,378 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 10 treesize of output 8 [2024-10-11 17:47:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:11,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:11,670 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:47:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:11,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178707865] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:11,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:11,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 17:47:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890101758] [2024-10-11 17:47:11,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:11,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:47:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:47:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:47:11,714 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:11,940 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-10-11 17:47:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:47:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:47:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:11,943 INFO L225 Difference]: With dead ends: 53 [2024-10-11 17:47:11,943 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 17:47:11,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:47:11,944 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:11,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 17:47:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-10-11 17:47:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-10-11 17:47:11,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2024-10-11 17:47:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:11,956 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-10-11 17:47:11,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-10-11 17:47:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 17:47:11,957 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:11,957 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:11,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 17:47:12,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:12,158 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:12,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash 745905309, now seen corresponding path program 1 times [2024-10-11 17:47:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378583051] [2024-10-11 17:47:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:12,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:12,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378583051] [2024-10-11 17:47:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378583051] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:12,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:12,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482736234] [2024-10-11 17:47:12,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:12,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:12,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:12,280 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:12,330 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-10-11 17:47:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 17:47:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:12,335 INFO L225 Difference]: With dead ends: 57 [2024-10-11 17:47:12,335 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 17:47:12,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:12,336 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:12,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 17:47:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-11 17:47:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-10-11 17:47:12,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 9 [2024-10-11 17:47:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:12,342 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-10-11 17:47:12,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-10-11 17:47:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 17:47:12,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:12,343 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:12,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 17:47:12,344 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:12,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -63441317, now seen corresponding path program 1 times [2024-10-11 17:47:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:12,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739020398] [2024-10-11 17:47:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:12,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739020398] [2024-10-11 17:47:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739020398] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:12,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:47:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130078829] [2024-10-11 17:47:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:12,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:47:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:47:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:47:12,513 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:12,568 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-10-11 17:47:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:47:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 17:47:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:12,570 INFO L225 Difference]: With dead ends: 70 [2024-10-11 17:47:12,570 INFO L226 Difference]: Without dead ends: 70 [2024-10-11 17:47:12,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:47:12,571 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:12,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-11 17:47:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2024-10-11 17:47:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-11 17:47:12,579 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 9 [2024-10-11 17:47:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:12,579 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-11 17:47:12,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-11 17:47:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:47:12,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:12,580 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:12,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 17:47:12,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:12,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1648228094, now seen corresponding path program 1 times [2024-10-11 17:47:12,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084534217] [2024-10-11 17:47:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084534217] [2024-10-11 17:47:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084534217] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:12,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:12,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292399354] [2024-10-11 17:47:12,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:12,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:12,680 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:12,709 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-10-11 17:47:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 17:47:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:12,711 INFO L225 Difference]: With dead ends: 64 [2024-10-11 17:47:12,711 INFO L226 Difference]: Without dead ends: 64 [2024-10-11 17:47:12,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:12,711 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:12,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-11 17:47:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-10-11 17:47:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-10-11 17:47:12,720 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 10 [2024-10-11 17:47:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:12,720 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-10-11 17:47:12,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-10-11 17:47:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:47:12,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:12,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:12,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 17:47:12,721 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:12,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash 838881468, now seen corresponding path program 1 times [2024-10-11 17:47:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:12,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252208704] [2024-10-11 17:47:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:12,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:12,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252208704] [2024-10-11 17:47:12,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252208704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:12,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:12,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:47:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603992011] [2024-10-11 17:47:12,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:12,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:47:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:47:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:12,937 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:12,984 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-10-11 17:47:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:47:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 17:47:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:12,985 INFO L225 Difference]: With dead ends: 69 [2024-10-11 17:47:12,986 INFO L226 Difference]: Without dead ends: 69 [2024-10-11 17:47:12,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:12,986 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:12,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-11 17:47:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-10-11 17:47:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-10-11 17:47:12,990 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 10 [2024-10-11 17:47:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:12,990 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-10-11 17:47:12,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-10-11 17:47:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:47:12,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:12,991 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:12,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 17:47:12,992 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:12,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash 838995473, now seen corresponding path program 1 times [2024-10-11 17:47:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:12,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063806767] [2024-10-11 17:47:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:12,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:13,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:13,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063806767] [2024-10-11 17:47:13,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063806767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:13,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941168197] [2024-10-11 17:47:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:13,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:13,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:13,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:47:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:13,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 17:47:13,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:13,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-11 17:47:13,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:47:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:13,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941168197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:13,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-11 17:47:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411669060] [2024-10-11 17:47:13,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:13,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 17:47:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 17:47:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:47:13,593 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:13,816 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2024-10-11 17:47:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:47:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 17:47:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:13,818 INFO L225 Difference]: With dead ends: 64 [2024-10-11 17:47:13,818 INFO L226 Difference]: Without dead ends: 64 [2024-10-11 17:47:13,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:47:13,819 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:13,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-11 17:47:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2024-10-11 17:47:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.553191489361702) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-10-11 17:47:13,825 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 10 [2024-10-11 17:47:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:13,826 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-10-11 17:47:13,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-10-11 17:47:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:47:13,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:13,826 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:13,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:47:14,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:14,028 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -444535241, now seen corresponding path program 1 times [2024-10-11 17:47:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312387208] [2024-10-11 17:47:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312387208] [2024-10-11 17:47:14,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312387208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:14,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:14,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:14,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131827153] [2024-10-11 17:47:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:14,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:14,062 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:14,103 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-10-11 17:47:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:14,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:47:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:14,104 INFO L225 Difference]: With dead ends: 59 [2024-10-11 17:47:14,104 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 17:47:14,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:14,105 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:14,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 43 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 17:47:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-11 17:47:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-11 17:47:14,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 11 [2024-10-11 17:47:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:14,108 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-11 17:47:14,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-11 17:47:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:47:14,108 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:14,108 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:14,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 17:47:14,109 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash -444535240, now seen corresponding path program 1 times [2024-10-11 17:47:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942151674] [2024-10-11 17:47:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942151674] [2024-10-11 17:47:14,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942151674] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:14,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:14,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:47:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010885114] [2024-10-11 17:47:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:14,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:47:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:47:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:14,180 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:14,249 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2024-10-11 17:47:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:47:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:47:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:14,250 INFO L225 Difference]: With dead ends: 66 [2024-10-11 17:47:14,250 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 17:47:14,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:47:14,251 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:14,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 17:47:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-10-11 17:47:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-10-11 17:47:14,253 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 11 [2024-10-11 17:47:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:14,254 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-10-11 17:47:14,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-10-11 17:47:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:47:14,255 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:14,255 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:14,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 17:47:14,256 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1198880347, now seen corresponding path program 1 times [2024-10-11 17:47:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250743632] [2024-10-11 17:47:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250743632] [2024-10-11 17:47:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250743632] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:47:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630549300] [2024-10-11 17:47:14,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:14,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:47:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:47:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:14,424 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:14,462 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-10-11 17:47:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:47:14,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:47:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:14,463 INFO L225 Difference]: With dead ends: 61 [2024-10-11 17:47:14,463 INFO L226 Difference]: Without dead ends: 61 [2024-10-11 17:47:14,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:14,463 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:14,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-11 17:47:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2024-10-11 17:47:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-10-11 17:47:14,469 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 11 [2024-10-11 17:47:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:14,469 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-10-11 17:47:14,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-10-11 17:47:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:47:14,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:14,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:14,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 17:47:14,470 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -895689182, now seen corresponding path program 1 times [2024-10-11 17:47:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501200466] [2024-10-11 17:47:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501200466] [2024-10-11 17:47:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501200466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:14,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:14,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:14,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116240991] [2024-10-11 17:47:14,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:14,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:14,543 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:14,597 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-10-11 17:47:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:14,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:47:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:14,598 INFO L225 Difference]: With dead ends: 49 [2024-10-11 17:47:14,598 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:47:14,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:47:14,599 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:14,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:47:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-11 17:47:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-10-11 17:47:14,601 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 12 [2024-10-11 17:47:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:14,601 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-10-11 17:47:14,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-10-11 17:47:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:47:14,602 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:14,602 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:14,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 17:47:14,603 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -895689181, now seen corresponding path program 1 times [2024-10-11 17:47:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380345614] [2024-10-11 17:47:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380345614] [2024-10-11 17:47:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380345614] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:47:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410002213] [2024-10-11 17:47:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:14,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:47:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:47:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:14,691 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:14,738 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-10-11 17:47:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:47:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:47:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:14,739 INFO L225 Difference]: With dead ends: 48 [2024-10-11 17:47:14,739 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 17:47:14,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:14,740 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:14,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 67 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 17:47:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-11 17:47:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2024-10-11 17:47:14,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 12 [2024-10-11 17:47:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:14,742 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2024-10-11 17:47:14,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2024-10-11 17:47:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:47:14,742 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:14,742 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:14,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 17:47:14,743 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:14,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1179253281, now seen corresponding path program 1 times [2024-10-11 17:47:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:14,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921299292] [2024-10-11 17:47:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921299292] [2024-10-11 17:47:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921299292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955964570] [2024-10-11 17:47:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:14,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:14,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:14,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:14,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:47:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:14,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 17:47:14,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:15,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:47:15,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:47:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:15,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955964570] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:47:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-10-11 17:47:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240528817] [2024-10-11 17:47:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:15,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:47:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:47:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:47:15,306 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:15,481 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-10-11 17:47:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:47:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:47:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:15,482 INFO L225 Difference]: With dead ends: 48 [2024-10-11 17:47:15,482 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 17:47:15,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:47:15,483 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:15,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 17:47:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-10-11 17:47:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.457142857142857) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-11 17:47:15,486 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2024-10-11 17:47:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:15,487 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-11 17:47:15,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-11 17:47:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 17:47:15,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:15,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:15,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:15,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:15,694 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:15,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1763843293, now seen corresponding path program 1 times [2024-10-11 17:47:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122454446] [2024-10-11 17:47:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122454446] [2024-10-11 17:47:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122454446] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:47:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662113946] [2024-10-11 17:47:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:15,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:47:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:47:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:47:15,744 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:15,799 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-10-11 17:47:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:47:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 17:47:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:15,800 INFO L225 Difference]: With dead ends: 43 [2024-10-11 17:47:15,800 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 17:47:15,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:47:15,800 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:15,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 17:47:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-11 17:47:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-10-11 17:47:15,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 14 [2024-10-11 17:47:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:15,802 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-10-11 17:47:15,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-10-11 17:47:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 17:47:15,806 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:15,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:15,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 17:47:15,807 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:15,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1763843292, now seen corresponding path program 1 times [2024-10-11 17:47:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:15,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756014252] [2024-10-11 17:47:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:15,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:15,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756014252] [2024-10-11 17:47:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756014252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:15,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 17:47:15,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102556503] [2024-10-11 17:47:15,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:15,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:47:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:47:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:47:15,947 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:16,026 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-11 17:47:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:47:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 17:47:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:16,027 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:47:16,027 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:47:16,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:47:16,029 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:16,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:47:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2024-10-11 17:47:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-11 17:47:16,034 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 14 [2024-10-11 17:47:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:16,035 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-11 17:47:16,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-11 17:47:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 17:47:16,035 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:16,035 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:16,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-11 17:47:16,035 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:16,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1155431771, now seen corresponding path program 1 times [2024-10-11 17:47:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484697765] [2024-10-11 17:47:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:16,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484697765] [2024-10-11 17:47:16,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484697765] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:16,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:16,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:47:16,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452040790] [2024-10-11 17:47:16,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:16,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:16,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:16,087 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:16,114 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-10-11 17:47:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 17:47:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:16,115 INFO L225 Difference]: With dead ends: 43 [2024-10-11 17:47:16,115 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 17:47:16,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:16,117 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:16,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 17:47:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-11 17:47:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-10-11 17:47:16,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2024-10-11 17:47:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:16,121 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-10-11 17:47:16,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-10-11 17:47:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 17:47:16,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:16,122 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:16,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-11 17:47:16,122 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:16,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1155431772, now seen corresponding path program 1 times [2024-10-11 17:47:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482312610] [2024-10-11 17:47:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:16,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482312610] [2024-10-11 17:47:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482312610] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:16,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:16,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:47:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723108513] [2024-10-11 17:47:16,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:16,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:47:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:16,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:47:16,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:47:16,318 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:16,405 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-10-11 17:47:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:47:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 17:47:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:16,406 INFO L225 Difference]: With dead ends: 47 [2024-10-11 17:47:16,406 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 17:47:16,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:47:16,407 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:16,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 96 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 17:47:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-10-11 17:47:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-11 17:47:16,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2024-10-11 17:47:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:16,408 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-11 17:47:16,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-11 17:47:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:47:16,409 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:16,409 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:16,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-11 17:47:16,410 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:16,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1458678993, now seen corresponding path program 1 times [2024-10-11 17:47:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609050455] [2024-10-11 17:47:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:16,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609050455] [2024-10-11 17:47:16,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609050455] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:16,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:16,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 17:47:16,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529818449] [2024-10-11 17:47:16,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:16,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:47:16,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:47:16,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:47:16,562 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:16,621 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-10-11 17:47:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:47:16,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-11 17:47:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:16,622 INFO L225 Difference]: With dead ends: 57 [2024-10-11 17:47:16,622 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 17:47:16,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:47:16,623 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:16,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 17:47:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-11 17:47:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-10-11 17:47:16,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2024-10-11 17:47:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:16,625 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-10-11 17:47:16,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-10-11 17:47:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:47:16,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:16,626 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:16,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-11 17:47:16,626 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:16,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,626 INFO L85 PathProgramCache]: Analyzing trace with hash 178815315, now seen corresponding path program 1 times [2024-10-11 17:47:16,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222330] [2024-10-11 17:47:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222330] [2024-10-11 17:47:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222330] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:16,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 17:47:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591131203] [2024-10-11 17:47:16,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:16,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:47:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:47:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:47:16,804 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:16,904 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-10-11 17:47:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:47:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-11 17:47:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:16,905 INFO L225 Difference]: With dead ends: 74 [2024-10-11 17:47:16,905 INFO L226 Difference]: Without dead ends: 74 [2024-10-11 17:47:16,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:47:16,907 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:16,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-11 17:47:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2024-10-11 17:47:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-10-11 17:47:16,911 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 16 [2024-10-11 17:47:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:16,911 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-10-11 17:47:16,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-10-11 17:47:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 17:47:16,912 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:16,912 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:16,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-11 17:47:16,913 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:16,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2026582198, now seen corresponding path program 1 times [2024-10-11 17:47:16,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47464197] [2024-10-11 17:47:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:17,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47464197] [2024-10-11 17:47:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47464197] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:17,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:47:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130562106] [2024-10-11 17:47:17,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:17,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:47:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:47:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:17,046 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:17,071 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-10-11 17:47:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:47:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-11 17:47:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:17,072 INFO L225 Difference]: With dead ends: 57 [2024-10-11 17:47:17,072 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 17:47:17,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:47:17,073 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:17,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 17:47:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-11 17:47:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-11 17:47:17,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2024-10-11 17:47:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:17,075 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-11 17:47:17,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-11 17:47:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 17:47:17,076 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:17,076 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:17,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-11 17:47:17,076 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:17,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2114877751, now seen corresponding path program 1 times [2024-10-11 17:47:17,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:17,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493210242] [2024-10-11 17:47:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:17,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493210242] [2024-10-11 17:47:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493210242] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149547003] [2024-10-11 17:47:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:17,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:17,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:17,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:17,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:47:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:17,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 17:47:17,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:17,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:17,503 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 5 treesize of output 3 [2024-10-11 17:47:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149547003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:17,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:17,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-10-11 17:47:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960461736] [2024-10-11 17:47:17,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:17,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:47:17,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:47:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:47:17,535 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:17,681 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-10-11 17:47:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:47:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-11 17:47:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:17,682 INFO L225 Difference]: With dead ends: 42 [2024-10-11 17:47:17,682 INFO L226 Difference]: Without dead ends: 42 [2024-10-11 17:47:17,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:47:17,682 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:17,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 93 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-11 17:47:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2024-10-11 17:47:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-11 17:47:17,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 18 [2024-10-11 17:47:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:17,684 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-11 17:47:17,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-11 17:47:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:47:17,685 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:17,685 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:17,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:17,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 17:47:17,885 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:17,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1136699470, now seen corresponding path program 1 times [2024-10-11 17:47:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:17,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067575475] [2024-10-11 17:47:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:18,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067575475] [2024-10-11 17:47:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067575475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:18,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:47:18,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 17:47:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134215749] [2024-10-11 17:47:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:18,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:47:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:47:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:47:18,163 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:18,247 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2024-10-11 17:47:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:47:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:47:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:18,248 INFO L225 Difference]: With dead ends: 44 [2024-10-11 17:47:18,248 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 17:47:18,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:47:18,249 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:18,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 17:47:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 17:47:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-10-11 17:47:18,250 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2024-10-11 17:47:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:18,250 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-10-11 17:47:18,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-10-11 17:47:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:47:18,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:18,251 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:18,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-10-11 17:47:18,251 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:18,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:18,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1569919924, now seen corresponding path program 1 times [2024-10-11 17:47:18,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:18,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262607085] [2024-10-11 17:47:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:18,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:18,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262607085] [2024-10-11 17:47:18,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262607085] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:18,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662735806] [2024-10-11 17:47:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:18,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:18,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:18,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:18,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:47:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:18,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 17:47:18,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:18,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-11 17:47:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:47:19,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:47:19,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 10 [2024-10-11 17:47:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:19,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:47:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662735806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:47:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2024-10-11 17:47:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465861750] [2024-10-11 17:47:19,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:19,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:47:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:47:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:47:19,120 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:19,208 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-10-11 17:47:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:47:19,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:47:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:19,209 INFO L225 Difference]: With dead ends: 40 [2024-10-11 17:47:19,209 INFO L226 Difference]: Without dead ends: 32 [2024-10-11 17:47:19,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:47:19,210 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:19,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-11 17:47:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-10-11 17:47:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-10-11 17:47:19,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2024-10-11 17:47:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:19,212 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-10-11 17:47:19,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-10-11 17:47:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 17:47:19,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:19,213 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:19,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 17:47:19,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 17:47:19,417 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:19,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -740303055, now seen corresponding path program 1 times [2024-10-11 17:47:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141130650] [2024-10-11 17:47:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141130650] [2024-10-11 17:47:19,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141130650] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043200971] [2024-10-11 17:47:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:19,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:19,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:47:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:19,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:47:19,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:19,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:19,925 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 5 treesize of output 3 [2024-10-11 17:47:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:19,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043200971] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:19,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:19,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-10-11 17:47:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531508187] [2024-10-11 17:47:19,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:19,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:47:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:47:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:47:19,951 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:20,077 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-10-11 17:47:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:47:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-11 17:47:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:20,078 INFO L225 Difference]: With dead ends: 33 [2024-10-11 17:47:20,078 INFO L226 Difference]: Without dead ends: 33 [2024-10-11 17:47:20,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:47:20,079 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:20,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 112 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-11 17:47:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-10-11 17:47:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-10-11 17:47:20,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2024-10-11 17:47:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:20,081 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-10-11 17:47:20,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-10-11 17:47:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 17:47:20,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:20,081 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:20,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 17:47:20,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 17:47:20,282 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:20,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1533335730, now seen corresponding path program 1 times [2024-10-11 17:47:20,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:20,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516067446] [2024-10-11 17:47:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:20,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:20,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516067446] [2024-10-11 17:47:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516067446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155762366] [2024-10-11 17:47:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:20,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:20,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:47:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:20,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:47:20,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:20,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:20,787 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 5 treesize of output 3 [2024-10-11 17:47:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155762366] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:20,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-11 17:47:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586531798] [2024-10-11 17:47:20,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:20,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 17:47:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 17:47:20,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:47:20,821 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:20,995 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-10-11 17:47:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:47:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-11 17:47:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:20,996 INFO L225 Difference]: With dead ends: 35 [2024-10-11 17:47:20,996 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 17:47:20,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:47:20,997 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:20,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 77 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 17:47:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-10-11 17:47:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-10-11 17:47:21,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2024-10-11 17:47:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:21,001 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-10-11 17:47:21,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-10-11 17:47:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 17:47:21,002 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:21,002 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:21,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 17:47:21,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:21,203 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:21,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash 288766350, now seen corresponding path program 1 times [2024-10-11 17:47:21,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997971810] [2024-10-11 17:47:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:21,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997971810] [2024-10-11 17:47:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997971810] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134474465] [2024-10-11 17:47:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:21,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:21,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:47:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:21,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 17:47:21,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:21,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:21,805 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 5 treesize of output 3 [2024-10-11 17:47:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:21,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134474465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:21,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-10-11 17:47:21,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264727746] [2024-10-11 17:47:21,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:21,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 17:47:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 17:47:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:47:21,836 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:21,994 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-10-11 17:47:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:47:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-11 17:47:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:21,995 INFO L225 Difference]: With dead ends: 39 [2024-10-11 17:47:21,995 INFO L226 Difference]: Without dead ends: 37 [2024-10-11 17:47:21,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:47:21,996 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:21,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 124 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-11 17:47:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-10-11 17:47:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-10-11 17:47:21,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2024-10-11 17:47:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:21,997 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-10-11 17:47:21,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-10-11 17:47:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:47:21,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:21,998 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:22,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:22,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-11 17:47:22,199 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:22,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 361854687, now seen corresponding path program 1 times [2024-10-11 17:47:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147855372] [2024-10-11 17:47:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147855372] [2024-10-11 17:47:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147855372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894364399] [2024-10-11 17:47:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:22,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:22,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:22,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:47:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:22,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-11 17:47:22,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:22,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:47:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:22,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:22,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-11 17:47:22,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:47:22,778 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 16 treesize of output 12 [2024-10-11 17:47:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:22,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894364399] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:22,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:22,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-10-11 17:47:22,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620680575] [2024-10-11 17:47:22,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:22,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 17:47:22,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:22,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 17:47:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2024-10-11 17:47:22,842 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:23,207 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-10-11 17:47:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 17:47:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-11 17:47:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:23,208 INFO L225 Difference]: With dead ends: 81 [2024-10-11 17:47:23,208 INFO L226 Difference]: Without dead ends: 38 [2024-10-11 17:47:23,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 17:47:23,211 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:23,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-11 17:47:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-10-11 17:47:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-10-11 17:47:23,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2024-10-11 17:47:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:23,213 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-10-11 17:47:23,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-10-11 17:47:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 17:47:23,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:23,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:23,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:23,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:23,416 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:23,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash -944075546, now seen corresponding path program 2 times [2024-10-11 17:47:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:23,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738759022] [2024-10-11 17:47:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738759022] [2024-10-11 17:47:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738759022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174024510] [2024-10-11 17:47:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:23,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:23,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:47:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:23,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 17:47:23,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:23,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:24,066 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 5 treesize of output 3 [2024-10-11 17:47:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:24,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174024510] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:24,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:24,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-11 17:47:24,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028956130] [2024-10-11 17:47:24,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:24,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 17:47:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 17:47:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:47:24,112 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:24,283 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2024-10-11 17:47:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:47:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-11 17:47:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:24,284 INFO L225 Difference]: With dead ends: 43 [2024-10-11 17:47:24,284 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 17:47:24,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-10-11 17:47:24,285 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:24,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 118 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 17:47:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-10-11 17:47:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-10-11 17:47:24,287 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2024-10-11 17:47:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:24,287 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-10-11 17:47:24,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-10-11 17:47:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 17:47:24,288 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:24,288 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:24,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 17:47:24,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-11 17:47:24,493 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:24,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash 798430517, now seen corresponding path program 2 times [2024-10-11 17:47:24,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:24,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048346127] [2024-10-11 17:47:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:24,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:24,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048346127] [2024-10-11 17:47:24,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048346127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:24,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309526560] [2024-10-11 17:47:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:24,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:24,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:24,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:24,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:47:24,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:24,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:24,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 17:47:24,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:24,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:47:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:24,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309526560] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:25,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-10-11 17:47:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211911588] [2024-10-11 17:47:25,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:25,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 17:47:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 17:47:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:47:25,169 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:25,378 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-10-11 17:47:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:47:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-11 17:47:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:25,379 INFO L225 Difference]: With dead ends: 40 [2024-10-11 17:47:25,379 INFO L226 Difference]: Without dead ends: 40 [2024-10-11 17:47:25,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-10-11 17:47:25,380 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:25,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 145 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-11 17:47:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-11 17:47:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-10-11 17:47:25,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2024-10-11 17:47:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:25,383 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-10-11 17:47:25,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-10-11 17:47:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 17:47:25,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:25,384 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:25,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 17:47:25,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-11 17:47:25,588 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:25,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 514659594, now seen corresponding path program 2 times [2024-10-11 17:47:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649856988] [2024-10-11 17:47:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649856988] [2024-10-11 17:47:25,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649856988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13265872] [2024-10-11 17:47:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:25,886 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:25,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:47:25,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 17:47:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:25,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 17:47:25,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 17:47:26,051 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:47:26,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13265872] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:47:26,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:47:26,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2024-10-11 17:47:26,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735809069] [2024-10-11 17:47:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:47:26,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:47:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:47:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-11 17:47:26,054 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:26,091 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-10-11 17:47:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:47:26,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-11 17:47:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:26,092 INFO L225 Difference]: With dead ends: 39 [2024-10-11 17:47:26,093 INFO L226 Difference]: Without dead ends: 37 [2024-10-11 17:47:26,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-11 17:47:26,093 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:26,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:47:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-11 17:47:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-11 17:47:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-10-11 17:47:26,095 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2024-10-11 17:47:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:26,095 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-10-11 17:47:26,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-10-11 17:47:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 17:47:26,096 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:26,096 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:26,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-11 17:47:26,297 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:26,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1225389341, now seen corresponding path program 3 times [2024-10-11 17:47:26,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:26,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265467826] [2024-10-11 17:47:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:26,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265467826] [2024-10-11 17:47:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265467826] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573236675] [2024-10-11 17:47:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:26,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:26,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:26,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:26,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:47:26,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 17:47:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:26,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-11 17:47:26,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:27,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:47:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:27,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:27,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:47:27,357 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 16 treesize of output 12 [2024-10-11 17:47:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:47:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573236675] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:27,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 15] total 39 [2024-10-11 17:47:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259707062] [2024-10-11 17:47:27,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:27,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 17:47:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 17:47:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 17:47:27,538 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:27,743 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-10-11 17:47:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 17:47:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-11 17:47:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:27,744 INFO L225 Difference]: With dead ends: 67 [2024-10-11 17:47:27,744 INFO L226 Difference]: Without dead ends: 40 [2024-10-11 17:47:27,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 17:47:27,745 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:27,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-11 17:47:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-10-11 17:47:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-10-11 17:47:27,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2024-10-11 17:47:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:27,747 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-10-11 17:47:27,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-10-11 17:47:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 17:47:27,747 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:27,748 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:27,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:27,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:27,949 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:27,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash -665852071, now seen corresponding path program 4 times [2024-10-11 17:47:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:27,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232670950] [2024-10-11 17:47:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:47:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232670950] [2024-10-11 17:47:28,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232670950] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:28,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718699107] [2024-10-11 17:47:28,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:28,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:28,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:28,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:47:28,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:28,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-10-11 17:47:28,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:28,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-11 17:47:29,157 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-11 17:47:29,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 36 [2024-10-11 17:47:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:29,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:29,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:47:29,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 38 [2024-10-11 17:47:29,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-11 17:47:29,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:47:29,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-10-11 17:47:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718699107] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:30,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:30,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 49 [2024-10-11 17:47:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810538851] [2024-10-11 17:47:30,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:30,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-11 17:47:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-11 17:47:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2171, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 17:47:30,155 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:31,533 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2024-10-11 17:47:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 17:47:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-11 17:47:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:31,535 INFO L225 Difference]: With dead ends: 67 [2024-10-11 17:47:31,535 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:47:31,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=392, Invalid=5460, Unknown=0, NotChecked=0, Total=5852 [2024-10-11 17:47:31,537 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:31,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 147 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:47:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:47:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-10-11 17:47:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-10-11 17:47:31,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2024-10-11 17:47:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:31,539 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-10-11 17:47:31,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-10-11 17:47:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 17:47:31,539 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:31,540 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:31,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 17:47:31,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-11 17:47:31,743 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:31,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2117992671, now seen corresponding path program 3 times [2024-10-11 17:47:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652528338] [2024-10-11 17:47:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:32,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:32,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652528338] [2024-10-11 17:47:32,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652528338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375951391] [2024-10-11 17:47:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:32,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:32,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:47:32,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 17:47:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:32,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 17:47:32,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:32,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:47:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:32,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:32,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375951391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:32,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:32,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-10-11 17:47:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677063330] [2024-10-11 17:47:32,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:32,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 17:47:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 17:47:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:47:32,618 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 33 states, 32 states have (on average 2.96875) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:32,827 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2024-10-11 17:47:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:47:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.96875) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-11 17:47:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:32,827 INFO L225 Difference]: With dead ends: 46 [2024-10-11 17:47:32,828 INFO L226 Difference]: Without dead ends: 46 [2024-10-11 17:47:32,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 17:47:32,828 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:32,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 163 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:47:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-11 17:47:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-11 17:47:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2024-10-11 17:47:32,830 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2024-10-11 17:47:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:32,830 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2024-10-11 17:47:32,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.96875) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2024-10-11 17:47:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 17:47:32,831 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:32,831 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:33,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 17:47:33,032 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:33,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 998969741, now seen corresponding path program 5 times [2024-10-11 17:47:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:33,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241186505] [2024-10-11 17:47:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241186505] [2024-10-11 17:47:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241186505] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387008410] [2024-10-11 17:47:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:47:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:33,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:33,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:47:33,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-11 17:47:33,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:33,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-11 17:47:33,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:33,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:47:33,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 17:47:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:33,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:33,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-10-11 17:47:34,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:47:34,019 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 16 treesize of output 12 [2024-10-11 17:47:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387008410] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:34,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-11 17:47:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429508367] [2024-10-11 17:47:34,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:34,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 17:47:34,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 17:47:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2024-10-11 17:47:34,142 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:34,434 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2024-10-11 17:47:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:47:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-11 17:47:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:34,435 INFO L225 Difference]: With dead ends: 80 [2024-10-11 17:47:34,435 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:47:34,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 17:47:34,436 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:34,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 327 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:47:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-11 17:47:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-10-11 17:47:34,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2024-10-11 17:47:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:34,437 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-10-11 17:47:34,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-10-11 17:47:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:47:34,438 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:34,438 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:34,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:34,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 17:47:34,639 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:34,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1164106199, now seen corresponding path program 6 times [2024-10-11 17:47:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243945241] [2024-10-11 17:47:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:47:34,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:34,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243945241] [2024-10-11 17:47:34,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243945241] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:34,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610512705] [2024-10-11 17:47:34,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:47:34,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:34,966 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:34,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:47:35,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-11 17:47:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:35,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-10-11 17:47:35,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:35,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:47:35,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:47:35,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 17:47:35,921 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:47:35,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-10-11 17:47:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:35,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:36,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-11 17:47:36,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-11 17:47:36,359 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 22 treesize of output 20 [2024-10-11 17:47:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:36,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610512705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:36,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:36,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 17] total 46 [2024-10-11 17:47:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031153102] [2024-10-11 17:47:36,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:36,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-11 17:47:36,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-11 17:47:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 17:47:36,803 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:38,031 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-10-11 17:47:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 17:47:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-11 17:47:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:38,032 INFO L225 Difference]: With dead ends: 81 [2024-10-11 17:47:38,032 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 17:47:38,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2024-10-11 17:47:38,034 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:38,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 189 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:47:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 17:47:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-10-11 17:47:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-10-11 17:47:38,036 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2024-10-11 17:47:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:38,036 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-10-11 17:47:38,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-10-11 17:47:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 17:47:38,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:38,037 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:38,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:38,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 17:47:38,237 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:38,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 145050247, now seen corresponding path program 4 times [2024-10-11 17:47:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:38,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728412711] [2024-10-11 17:47:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:38,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:38,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728412711] [2024-10-11 17:47:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728412711] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:38,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567540606] [2024-10-11 17:47:38,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:38,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:38,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:47:38,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:38,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-10-11 17:47:38,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:38,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-11 17:47:40,632 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-10-11 17:47:40,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 65 [2024-10-11 17:47:40,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:47:40,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 31 [2024-10-11 17:47:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 17 refuted. 1 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 17:47:40,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:42,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:47:42,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 51 [2024-10-11 17:47:42,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-11 17:47:42,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-10-11 17:47:42,562 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 5 treesize of output 3 [2024-10-11 17:47:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 17:47:42,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567540606] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:42,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:42,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 24] total 57 [2024-10-11 17:47:42,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956060664] [2024-10-11 17:47:42,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:42,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-11 17:47:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:42,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-11 17:47:42,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2940, Unknown=1, NotChecked=0, Total=3306 [2024-10-11 17:47:42,592 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 58 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:45,021 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-10-11 17:47:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-11 17:47:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 58 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-11 17:47:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:45,022 INFO L225 Difference]: With dead ends: 53 [2024-10-11 17:47:45,022 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 17:47:45,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=940, Invalid=7069, Unknown=1, NotChecked=0, Total=8010 [2024-10-11 17:47:45,024 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:45,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:47:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 17:47:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-11 17:47:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-10-11 17:47:45,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2024-10-11 17:47:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:45,026 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-10-11 17:47:45,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 58 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-10-11 17:47:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 17:47:45,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:45,027 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:45,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 17:47:45,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-10-11 17:47:45,228 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:45,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1214596917, now seen corresponding path program 7 times [2024-10-11 17:47:45,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:45,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847583754] [2024-10-11 17:47:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847583754] [2024-10-11 17:47:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847583754] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381541488] [2024-10-11 17:47:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:47:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:45,718 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:45,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:47:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:45,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 17:47:45,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:46,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:47:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:46,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:46,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:47:46,105 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 16 treesize of output 12 [2024-10-11 17:47:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381541488] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:46,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 29 [2024-10-11 17:47:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202387914] [2024-10-11 17:47:46,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:46,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 17:47:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 17:47:46,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-10-11 17:47:46,169 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:46,509 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-10-11 17:47:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 17:47:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-11 17:47:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:46,510 INFO L225 Difference]: With dead ends: 94 [2024-10-11 17:47:46,510 INFO L226 Difference]: Without dead ends: 56 [2024-10-11 17:47:46,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 17:47:46,511 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:46,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:47:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-11 17:47:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-11 17:47:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-10-11 17:47:46,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2024-10-11 17:47:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:46,514 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-10-11 17:47:46,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-10-11 17:47:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 17:47:46,514 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:46,515 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:46,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:46,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:46,715 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:46,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1577660971, now seen corresponding path program 8 times [2024-10-11 17:47:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568465727] [2024-10-11 17:47:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:47,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568465727] [2024-10-11 17:47:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568465727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:47,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995468830] [2024-10-11 17:47:47,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:47,138 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:47,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:47:47,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:47,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:47,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-11 17:47:47,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:47,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:47,809 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 5 treesize of output 3 [2024-10-11 17:47:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995468830] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:47,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2024-10-11 17:47:47,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761876704] [2024-10-11 17:47:47,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:47,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 17:47:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 17:47:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:47:47,912 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 33 states, 32 states have (on average 3.09375) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:48,230 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2024-10-11 17:47:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:47:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-11 17:47:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:48,231 INFO L225 Difference]: With dead ends: 62 [2024-10-11 17:47:48,231 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 17:47:48,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 17:47:48,232 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:48,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 173 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:47:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 17:47:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-10-11 17:47:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-10-11 17:47:48,238 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2024-10-11 17:47:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:48,238 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-10-11 17:47:48,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-10-11 17:47:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 17:47:48,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:48,239 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:48,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:48,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:48,439 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:48,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash -423302978, now seen corresponding path program 9 times [2024-10-11 17:47:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377734601] [2024-10-11 17:47:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 17:47:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377734601] [2024-10-11 17:47:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377734601] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083481267] [2024-10-11 17:47:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:49,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:49,043 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:49,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:47:49,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-11 17:47:49,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:49,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-11 17:47:49,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:49,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:47:49,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 17:47:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:49,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:49,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-10-11 17:47:50,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:47:50,066 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 16 treesize of output 12 [2024-10-11 17:47:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:47:50,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083481267] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:50,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:50,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2024-10-11 17:47:50,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11898148] [2024-10-11 17:47:50,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:50,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-11 17:47:50,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-11 17:47:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2610, Unknown=0, NotChecked=0, Total=2756 [2024-10-11 17:47:50,324 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:52,313 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2024-10-11 17:47:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-11 17:47:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-10-11 17:47:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:52,314 INFO L225 Difference]: With dead ends: 172 [2024-10-11 17:47:52,314 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 17:47:52,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=512, Invalid=8418, Unknown=0, NotChecked=0, Total=8930 [2024-10-11 17:47:52,316 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:52,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 373 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:47:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 17:47:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-10-11 17:47:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2024-10-11 17:47:52,318 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2024-10-11 17:47:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:52,318 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2024-10-11 17:47:52,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2024-10-11 17:47:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 17:47:52,319 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:52,319 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:52,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 17:47:52,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-10-11 17:47:52,520 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:47:52,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 272408581, now seen corresponding path program 10 times [2024-10-11 17:47:52,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:52,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331968260] [2024-10-11 17:47:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:52,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 17:47:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331968260] [2024-10-11 17:47:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331968260] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202499442] [2024-10-11 17:47:52,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:52,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:52,961 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:52,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 17:47:53,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:53,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:53,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-10-11 17:47:53,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:53,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-11 17:48:07,628 INFO L349 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2024-10-11 17:48:07,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 75 [2024-10-11 17:48:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 25 proven. 45 refuted. 36 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:48:07,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:10,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:48:10,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 145 treesize of output 77 [2024-10-11 17:48:10,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-10-11 17:48:10,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:48:10,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 67 [2024-10-11 17:48:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:48:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202499442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:11,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40, 40] total 90 [2024-10-11 17:48:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269128868] [2024-10-11 17:48:11,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:11,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-10-11 17:48:11,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-10-11 17:48:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=7441, Unknown=39, NotChecked=0, Total=8010 [2024-10-11 17:48:11,023 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 90 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:26,813 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2024-10-11 17:48:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-11 17:48:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 90 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-11 17:48:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:26,814 INFO L225 Difference]: With dead ends: 107 [2024-10-11 17:48:26,814 INFO L226 Difference]: Without dead ends: 74 [2024-10-11 17:48:26,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=1073, Invalid=17787, Unknown=46, NotChecked=0, Total=18906 [2024-10-11 17:48:26,815 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 2 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:26,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 176 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1807 Invalid, 16 Unknown, 0 Unchecked, 6.0s Time] [2024-10-11 17:48:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-11 17:48:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2024-10-11 17:48:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-10-11 17:48:26,817 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2024-10-11 17:48:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:26,818 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-10-11 17:48:26,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 90 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-10-11 17:48:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-11 17:48:26,819 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:26,819 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:26,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-11 17:48:27,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:27,020 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:48:27,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2054985337, now seen corresponding path program 11 times [2024-10-11 17:48:27,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:27,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662648549] [2024-10-11 17:48:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:48:27,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662648549] [2024-10-11 17:48:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662648549] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617645329] [2024-10-11 17:48:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:48:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:27,698 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:27,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 17:48:27,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-11 17:48:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:27,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-10-11 17:48:27,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:28,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:48:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:48:28,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:28,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-11 17:48:29,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:48:29,029 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 16 treesize of output 12 [2024-10-11 17:48:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:48:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617645329] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:29,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 65 [2024-10-11 17:48:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657098050] [2024-10-11 17:48:29,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:29,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-11 17:48:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-11 17:48:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3978, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:48:29,356 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:31,279 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2024-10-11 17:48:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-10-11 17:48:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-10-11 17:48:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:31,280 INFO L225 Difference]: With dead ends: 205 [2024-10-11 17:48:31,280 INFO L226 Difference]: Without dead ends: 77 [2024-10-11 17:48:31,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=445, Invalid=10061, Unknown=0, NotChecked=0, Total=10506 [2024-10-11 17:48:31,281 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:31,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 430 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 17:48:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-11 17:48:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-10-11 17:48:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2024-10-11 17:48:31,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2024-10-11 17:48:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:31,283 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2024-10-11 17:48:31,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2024-10-11 17:48:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 17:48:31,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:31,284 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:31,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-11 17:48:31,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:31,485 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-11 17:48:31,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -337410272, now seen corresponding path program 12 times [2024-10-11 17:48:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672898076] [2024-10-11 17:48:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat