./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/lis-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/lis-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 14:27:07,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 14:27:07,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 14:27:07,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 14:27:07,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 14:27:07,984 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 14:27:07,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 14:27:07,985 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 14:27:07,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 14:27:07,987 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 14:27:07,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 14:27:07,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 14:27:07,988 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 14:27:07,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 14:27:07,989 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 14:27:07,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 14:27:07,989 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 14:27:07,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 14:27:07,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 14:27:07,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 14:27:07,994 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 14:27:07,995 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 14:27:07,995 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 14:27:07,995 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 14:27:07,996 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 14:27:07,996 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 14:27:07,996 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 14:27:07,996 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 14:27:07,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 14:27:07,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 14:27:07,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 14:27:07,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 14:27:07,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 14:27:07,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:27:07,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 14:27:07,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 14:27:07,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 14:27:07,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 14:27:07,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 14:27:08,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 14:27:08,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 14:27:08,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 14:27:08,000 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf [2024-11-20 14:27:08,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 14:27:08,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 14:27:08,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 14:27:08,268 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 14:27:08,269 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 14:27:08,270 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2024-11-20 14:27:09,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 14:27:09,883 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 14:27:09,883 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2024-11-20 14:27:09,898 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05335520/12a1d55ee40344c6b25f014ad9a8cb11/FLAGae978c8b2 [2024-11-20 14:27:10,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05335520/12a1d55ee40344c6b25f014ad9a8cb11 [2024-11-20 14:27:10,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 14:27:10,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 14:27:10,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 14:27:10,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 14:27:10,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 14:27:10,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e529e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10, skipping insertion in model container [2024-11-20 14:27:10,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,300 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 14:27:10,629 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 14:27:10,629 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 14:27:10,644 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 14:27:10,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:27:10,660 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 14:27:10,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:27:10,749 INFO L204 MainTranslator]: Completed translation [2024-11-20 14:27:10,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10 WrapperNode [2024-11-20 14:27:10,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 14:27:10,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 14:27:10,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 14:27:10,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 14:27:10,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,802 INFO L138 Inliner]: procedures = 116, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 117 [2024-11-20 14:27:10,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 14:27:10,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 14:27:10,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 14:27:10,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 14:27:10,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,827 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 7, 3]. 58 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 5 writes are split as follows [2, 2, 1]. [2024-11-20 14:27:10,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,836 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 14:27:10,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 14:27:10,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 14:27:10,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 14:27:10,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (1/1) ... [2024-11-20 14:27:10,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:27:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:10,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 14:27:10,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 14:27:10,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 14:27:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 14:27:10,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 14:27:11,004 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 14:27:11,006 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 14:27:11,286 INFO L? ?]: Removed 78 outVars from TransFormulas that were not future-live. [2024-11-20 14:27:11,286 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 14:27:11,298 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 14:27:11,299 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-20 14:27:11,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:27:11 BoogieIcfgContainer [2024-11-20 14:27:11,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 14:27:11,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 14:27:11,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 14:27:11,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 14:27:11,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:27:10" (1/3) ... [2024-11-20 14:27:11,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431c13de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:27:11, skipping insertion in model container [2024-11-20 14:27:11,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:10" (2/3) ... [2024-11-20 14:27:11,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431c13de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:27:11, skipping insertion in model container [2024-11-20 14:27:11,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:27:11" (3/3) ... [2024-11-20 14:27:11,310 INFO L112 eAbstractionObserver]: Analyzing ICFG lis-alloca-1.i [2024-11-20 14:27:11,326 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 14:27:11,328 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2024-11-20 14:27:11,375 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 14:27:11,384 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;@7eff9fa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 14:27:11,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-20 14:27:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 40 states have (on average 1.975) internal successors, (79), 65 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) [2024-11-20 14:27:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-20 14:27:11,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:11,397 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 14:27:11,397 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:11,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:11,405 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2024-11-20 14:27:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067352418] [2024-11-20 14:27:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:11,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:11,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067352418] [2024-11-20 14:27:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067352418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:11,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:11,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:27:11,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060546556] [2024-11-20 14:27:11,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:11,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:11,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:11,684 INFO L87 Difference]: Start difference. First operand has 66 states, 40 states have (on average 1.975) internal successors, (79), 65 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) 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) [2024-11-20 14:27:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:11,746 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-11-20 14:27:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:11,751 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 [2024-11-20 14:27:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:11,759 INFO L225 Difference]: With dead ends: 65 [2024-11-20 14:27:11,759 INFO L226 Difference]: Without dead ends: 63 [2024-11-20 14:27:11,761 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 [2024-11-20 14:27:11,765 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:11,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 107 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-20 14:27:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-20 14:27:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 62 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) [2024-11-20 14:27:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-11-20 14:27:11,793 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 6 [2024-11-20 14:27:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:11,793 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-11-20 14:27:11,793 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) [2024-11-20 14:27:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-11-20 14:27:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-20 14:27:11,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:11,794 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 14:27:11,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 14:27:11,795 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:11,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2024-11-20 14:27:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:11,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681513224] [2024-11-20 14:27:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:12,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681513224] [2024-11-20 14:27:12,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681513224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:12,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:12,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:12,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029769544] [2024-11-20 14:27:12,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:12,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:12,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:12,129 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2024-11-20 14:27:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:12,289 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2024-11-20 14:27:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2024-11-20 14:27:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:12,291 INFO L225 Difference]: With dead ends: 74 [2024-11-20 14:27:12,291 INFO L226 Difference]: Without dead ends: 74 [2024-11-20 14:27:12,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:12,293 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 14 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:12,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 214 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-20 14:27:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2024-11-20 14:27:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-11-20 14:27:12,300 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 6 [2024-11-20 14:27:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:12,301 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-11-20 14:27:12,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2024-11-20 14:27:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-11-20 14:27:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-20 14:27:12,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:12,302 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 14:27:12,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 14:27:12,302 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:12,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2024-11-20 14:27:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666758673] [2024-11-20 14:27:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:12,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:12,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666758673] [2024-11-20 14:27:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666758673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:12,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:12,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:12,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182063602] [2024-11-20 14:27:12,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:12,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:12,588 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2024-11-20 14:27:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:12,664 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2024-11-20 14:27:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 [2024-11-20 14:27:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:12,666 INFO L225 Difference]: With dead ends: 70 [2024-11-20 14:27:12,667 INFO L226 Difference]: Without dead ends: 70 [2024-11-20 14:27:12,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:12,670 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:12,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 223 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-20 14:27:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-11-20 14:27:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 64 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) [2024-11-20 14:27:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-11-20 14:27:12,677 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 6 [2024-11-20 14:27:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:12,677 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-11-20 14:27:12,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2024-11-20 14:27:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-11-20 14:27:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-20 14:27:12,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:12,678 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:12,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 14:27:12,678 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:12,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2024-11-20 14:27:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:12,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594352084] [2024-11-20 14:27:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594352084] [2024-11-20 14:27:12,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594352084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907213145] [2024-11-20 14:27:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:12,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:12,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 14:27:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:12,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 14:27:12,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:12,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907213145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:12,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:12,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-20 14:27:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357366890] [2024-11-20 14:27:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:12,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:12,913 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2024-11-20 14:27:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:12,947 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2024-11-20 14:27:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2024-11-20 14:27:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:12,948 INFO L225 Difference]: With dead ends: 72 [2024-11-20 14:27:12,948 INFO L226 Difference]: Without dead ends: 72 [2024-11-20 14:27:12,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:12,949 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:12,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 191 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-20 14:27:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-20 14:27:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 70 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) [2024-11-20 14:27:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2024-11-20 14:27:12,962 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 10 [2024-11-20 14:27:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:12,962 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2024-11-20 14:27:12,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2024-11-20 14:27:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2024-11-20 14:27:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-20 14:27:12,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:12,963 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:12,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 14:27:13,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:13,168 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:13,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2024-11-20 14:27:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153400172] [2024-11-20 14:27:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:13,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153400172] [2024-11-20 14:27:13,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153400172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833964353] [2024-11-20 14:27:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:13,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:13,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 14:27:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:13,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 14:27:13,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:13,697 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 10 treesize of output 9 [2024-11-20 14:27:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:13,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833964353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:14,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:14,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 14:27:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328230702] [2024-11-20 14:27:14,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:14,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 14:27:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 14:27:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:27:14,226 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:14,533 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2024-11-20 14:27:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:27:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2024-11-20 14:27:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:14,534 INFO L225 Difference]: With dead ends: 76 [2024-11-20 14:27:14,534 INFO L226 Difference]: Without dead ends: 76 [2024-11-20 14:27:14,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:27:14,536 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 27 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:14,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 539 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-20 14:27:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-11-20 14:27:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.673913043478261) internal successors, (77), 68 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) [2024-11-20 14:27:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-20 14:27:14,540 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 10 [2024-11-20 14:27:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:14,541 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-20 14:27:14,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-20 14:27:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-20 14:27:14,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:14,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:14,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 14:27:14,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:14,746 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:14,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash -680998152, now seen corresponding path program 1 times [2024-11-20 14:27:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:14,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174186322] [2024-11-20 14:27:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:14,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174186322] [2024-11-20 14:27:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174186322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:14,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:14,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:27:14,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882059788] [2024-11-20 14:27:14,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:14,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:14,833 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2024-11-20 14:27:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:14,892 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-11-20 14:27:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 [2024-11-20 14:27:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:14,895 INFO L225 Difference]: With dead ends: 62 [2024-11-20 14:27:14,895 INFO L226 Difference]: Without dead ends: 62 [2024-11-20 14:27:14,895 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 [2024-11-20 14:27:14,896 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:14,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-20 14:27:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-20 14:27:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 61 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) [2024-11-20 14:27:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-11-20 14:27:14,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 12 [2024-11-20 14:27:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:14,904 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-11-20 14:27:14,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2024-11-20 14:27:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-11-20 14:27:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-20 14:27:14,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:14,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:14,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 14:27:14,905 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:14,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2024-11-20 14:27:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:14,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826333789] [2024-11-20 14:27:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:14,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:15,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:15,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826333789] [2024-11-20 14:27:15,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826333789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:15,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:15,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:15,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185564295] [2024-11-20 14:27:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:15,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:15,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:15,067 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2024-11-20 14:27:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:15,137 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-11-20 14:27:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 [2024-11-20 14:27:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:15,138 INFO L225 Difference]: With dead ends: 68 [2024-11-20 14:27:15,138 INFO L226 Difference]: Without dead ends: 68 [2024-11-20 14:27:15,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:15,139 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 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 [2024-11-20 14:27:15,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-20 14:27:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2024-11-20 14:27:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.489795918367347) internal successors, (73), 64 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) [2024-11-20 14:27:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-11-20 14:27:15,143 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 12 [2024-11-20 14:27:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:15,144 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-11-20 14:27:15,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2024-11-20 14:27:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-11-20 14:27:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-20 14:27:15,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:15,146 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:15,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 14:27:15,146 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:15,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2024-11-20 14:27:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208161145] [2024-11-20 14:27:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:15,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208161145] [2024-11-20 14:27:15,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208161145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:15,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188951623] [2024-11-20 14:27:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:15,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:15,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:15,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 14:27:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:15,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:27:15,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:15,383 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 [2024-11-20 14:27:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:15,544 INFO L349 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2024-11-20 14:27:15,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2024-11-20 14:27:15,556 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 [2024-11-20 14:27:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:15,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:15,637 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 [2024-11-20 14:27:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188951623] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:27:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 12 [2024-11-20 14:27:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796424031] [2024-11-20 14:27:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:15,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:27:15,823 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2024-11-20 14:27:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:15,951 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2024-11-20 14:27:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 [2024-11-20 14:27:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:15,953 INFO L225 Difference]: With dead ends: 81 [2024-11-20 14:27:15,953 INFO L226 Difference]: Without dead ends: 81 [2024-11-20 14:27:15,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:27:15,953 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:15,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-20 14:27:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2024-11-20 14:27:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-11-20 14:27:15,961 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 12 [2024-11-20 14:27:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:15,961 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-11-20 14:27:15,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2024-11-20 14:27:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-11-20 14:27:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:27:15,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:15,962 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:15,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 14:27:16,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:16,167 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:16,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 363893777, now seen corresponding path program 1 times [2024-11-20 14:27:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300310998] [2024-11-20 14:27:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:16,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:16,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300310998] [2024-11-20 14:27:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300310998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:16,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:16,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:27:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083628071] [2024-11-20 14:27:16,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:16,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:16,218 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:16,248 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2024-11-20 14:27:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:16,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2024-11-20 14:27:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:16,249 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:27:16,249 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:16,249 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 [2024-11-20 14:27:16,251 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:16,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-20 14:27:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.5) internal successors, (90), 72 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2024-11-20 14:27:16,258 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 13 [2024-11-20 14:27:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:16,258 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2024-11-20 14:27:16,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2024-11-20 14:27:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:27:16,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:16,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:16,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 14:27:16,261 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:16,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 363893778, now seen corresponding path program 1 times [2024-11-20 14:27:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:16,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090432287] [2024-11-20 14:27:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:16,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:16,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:16,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090432287] [2024-11-20 14:27:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090432287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:16,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:16,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:16,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539775657] [2024-11-20 14:27:16,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:16,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:16,439 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:16,525 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-11-20 14:27:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2024-11-20 14:27:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:16,526 INFO L225 Difference]: With dead ends: 75 [2024-11-20 14:27:16,526 INFO L226 Difference]: Without dead ends: 75 [2024-11-20 14:27:16,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:16,527 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:16,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-20 14:27:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2024-11-20 14:27:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 73 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2024-11-20 14:27:16,531 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 13 [2024-11-20 14:27:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:16,531 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2024-11-20 14:27:16,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2024-11-20 14:27:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-20 14:27:16,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:16,532 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:16,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 14:27:16,532 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:16,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1221259799, now seen corresponding path program 1 times [2024-11-20 14:27:16,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207924651] [2024-11-20 14:27:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:16,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:16,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:16,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207924651] [2024-11-20 14:27:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207924651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:16,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663387181] [2024-11-20 14:27:16,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:16,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:16,596 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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) [2024-11-20 14:27:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:16,643 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-11-20 14:27:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 [2024-11-20 14:27:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:16,644 INFO L225 Difference]: With dead ends: 75 [2024-11-20 14:27:16,644 INFO L226 Difference]: Without dead ends: 75 [2024-11-20 14:27:16,644 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 [2024-11-20 14:27:16,645 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 3 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:16,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 125 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-20 14:27:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-20 14:27:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-11-20 14:27:16,648 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 15 [2024-11-20 14:27:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:16,648 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-11-20 14:27:16,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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) [2024-11-20 14:27:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-11-20 14:27:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:16,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:16,649 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:16,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 14:27:16,649 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:16,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash 262068158, now seen corresponding path program 1 times [2024-11-20 14:27:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:16,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243081195] [2024-11-20 14:27:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:16,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:16,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:16,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243081195] [2024-11-20 14:27:16,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243081195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:16,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316199915] [2024-11-20 14:27:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:16,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:16,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:16,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 14:27:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:16,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 14:27:16,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:16,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316199915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:16,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:16,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-20 14:27:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319871467] [2024-11-20 14:27:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:16,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:16,834 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2024-11-20 14:27:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:16,898 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-11-20 14:27:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 [2024-11-20 14:27:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:16,899 INFO L225 Difference]: With dead ends: 78 [2024-11-20 14:27:16,899 INFO L226 Difference]: Without dead ends: 78 [2024-11-20 14:27:16,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:16,900 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:16,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-20 14:27:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-20 14:27:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2024-11-20 14:27:16,907 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 16 [2024-11-20 14:27:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:16,907 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2024-11-20 14:27:16,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2024-11-20 14:27:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2024-11-20 14:27:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:16,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:16,907 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:16,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:17,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:17,109 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:17,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash -749049092, now seen corresponding path program 1 times [2024-11-20 14:27:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261506328] [2024-11-20 14:27:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:17,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261506328] [2024-11-20 14:27:17,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261506328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:17,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725553972] [2024-11-20 14:27:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:17,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:17,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 14:27:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:17,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 14:27:17,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:17,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725553972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:17,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 14:27:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663057391] [2024-11-20 14:27:17,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:17,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:27:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:27:17,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:27:17,359 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2024-11-20 14:27:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:17,488 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2024-11-20 14:27:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:27:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) Word has length 16 [2024-11-20 14:27:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:17,489 INFO L225 Difference]: With dead ends: 91 [2024-11-20 14:27:17,489 INFO L226 Difference]: Without dead ends: 91 [2024-11-20 14:27:17,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:27:17,490 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:17,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 267 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-20 14:27:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2024-11-20 14:27:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.434782608695652) internal successors, (99), 81 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) [2024-11-20 14:27:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2024-11-20 14:27:17,493 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 16 [2024-11-20 14:27:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:17,493 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2024-11-20 14:27:17,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2024-11-20 14:27:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2024-11-20 14:27:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:17,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:17,494 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:17,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 14:27:17,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 14:27:17,695 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:17,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -979573200, now seen corresponding path program 1 times [2024-11-20 14:27:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874030878] [2024-11-20 14:27:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874030878] [2024-11-20 14:27:17,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874030878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:17,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:17,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156150878] [2024-11-20 14:27:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:17,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:17,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:17,752 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2024-11-20 14:27:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:17,806 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2024-11-20 14:27:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 [2024-11-20 14:27:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:17,807 INFO L225 Difference]: With dead ends: 98 [2024-11-20 14:27:17,807 INFO L226 Difference]: Without dead ends: 98 [2024-11-20 14:27:17,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:17,808 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:17,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 175 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-20 14:27:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2024-11-20 14:27:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 89 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-11-20 14:27:17,810 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 19 [2024-11-20 14:27:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:17,810 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-11-20 14:27:17,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2024-11-20 14:27:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-11-20 14:27:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:17,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:17,811 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:17,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 14:27:17,812 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:17,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1727046194, now seen corresponding path program 1 times [2024-11-20 14:27:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928249112] [2024-11-20 14:27:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:17,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928249112] [2024-11-20 14:27:17,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928249112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:17,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141488788] [2024-11-20 14:27:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:17,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:17,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:17,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:17,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 14:27:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:17,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 14:27:17,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:18,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141488788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:18,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:18,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-20 14:27:18,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263332241] [2024-11-20 14:27:18,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:18,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 14:27:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 14:27:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:27:18,075 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:18,187 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2024-11-20 14:27:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:27:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2024-11-20 14:27:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:18,188 INFO L225 Difference]: With dead ends: 103 [2024-11-20 14:27:18,188 INFO L226 Difference]: Without dead ends: 103 [2024-11-20 14:27:18,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-20 14:27:18,190 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:18,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 291 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-20 14:27:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2024-11-20 14:27:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 83 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-20 14:27:18,193 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 19 [2024-11-20 14:27:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:18,194 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-20 14:27:18,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-20 14:27:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-20 14:27:18,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:18,195 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:18,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 14:27:18,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 14:27:18,395 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:18,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash -302013758, now seen corresponding path program 1 times [2024-11-20 14:27:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148456677] [2024-11-20 14:27:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:18,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148456677] [2024-11-20 14:27:18,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148456677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:18,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298975541] [2024-11-20 14:27:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:18,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:18,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 14:27:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:18,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 14:27:18,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:18,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:18,654 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 18 [2024-11-20 14:27:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298975541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:18,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-20 14:27:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913685839] [2024-11-20 14:27:18,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:18,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 14:27:18,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 14:27:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:27:18,671 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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) [2024-11-20 14:27:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:18,821 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2024-11-20 14:27:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:27:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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) Word has length 20 [2024-11-20 14:27:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:18,823 INFO L225 Difference]: With dead ends: 95 [2024-11-20 14:27:18,823 INFO L226 Difference]: Without dead ends: 95 [2024-11-20 14:27:18,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:27:18,823 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 145 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:18,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 119 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-20 14:27:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2024-11-20 14:27:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2024-11-20 14:27:18,826 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 20 [2024-11-20 14:27:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:18,826 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2024-11-20 14:27:18,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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) [2024-11-20 14:27:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2024-11-20 14:27:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-20 14:27:18,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:18,827 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:18,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 14:27:19,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:19,028 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:19,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646975, now seen corresponding path program 2 times [2024-11-20 14:27:19,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:19,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746991113] [2024-11-20 14:27:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:19,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746991113] [2024-11-20 14:27:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746991113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346282515] [2024-11-20 14:27:19,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:19,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:19,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:19,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 14:27:19,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:27:19,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:19,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 14:27:19,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:19,395 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 10 treesize of output 9 [2024-11-20 14:27:19,539 INFO L349 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2024-11-20 14:27:19,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2024-11-20 14:27:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:19,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346282515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:19,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:19,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2024-11-20 14:27:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084578412] [2024-11-20 14:27:19,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:19,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 14:27:19,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 14:27:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:27:19,958 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:20,440 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2024-11-20 14:27:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 14:27:20,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 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 20 [2024-11-20 14:27:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:20,441 INFO L225 Difference]: With dead ends: 111 [2024-11-20 14:27:20,441 INFO L226 Difference]: Without dead ends: 111 [2024-11-20 14:27:20,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:27:20,442 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:20,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 405 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:27:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-20 14:27:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2024-11-20 14:27:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 98 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2024-11-20 14:27:20,446 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 20 [2024-11-20 14:27:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:20,446 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2024-11-20 14:27:20,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2024-11-20 14:27:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-20 14:27:20,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:20,447 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:20,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 14:27:20,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 14:27:20,652 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:20,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1786415948, now seen corresponding path program 1 times [2024-11-20 14:27:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:20,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241533438] [2024-11-20 14:27:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:20,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:20,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:20,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241533438] [2024-11-20 14:27:20,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241533438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:20,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359476671] [2024-11-20 14:27:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:20,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:20,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:20,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 14:27:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:20,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:27:20,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:20,982 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 [2024-11-20 14:27:21,119 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 14:27:21,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 14:27:21,133 INFO L349 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2024-11-20 14:27:21,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2024-11-20 14:27:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:21,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:21,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359476671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:21,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:21,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-20 14:27:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14191751] [2024-11-20 14:27:21,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:21,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 14:27:21,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 14:27:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-20 14:27:21,374 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:21,868 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-11-20 14:27:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:27:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2024-11-20 14:27:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:21,869 INFO L225 Difference]: With dead ends: 119 [2024-11-20 14:27:21,869 INFO L226 Difference]: Without dead ends: 119 [2024-11-20 14:27:21,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:27:21,870 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:21,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 281 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:27:21,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-20 14:27:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2024-11-20 14:27:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 110 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2024-11-20 14:27:21,873 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 21 [2024-11-20 14:27:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:21,873 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2024-11-20 14:27:21,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2024-11-20 14:27:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-20 14:27:21,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:21,874 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:21,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 14:27:22,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 14:27:22,078 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:22,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:22,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1822513845, now seen corresponding path program 1 times [2024-11-20 14:27:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:22,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813201022] [2024-11-20 14:27:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:22,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:22,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813201022] [2024-11-20 14:27:22,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813201022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:22,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:22,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506870733] [2024-11-20 14:27:22,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:22,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:22,141 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:22,197 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2024-11-20 14:27:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2024-11-20 14:27:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:22,198 INFO L225 Difference]: With dead ends: 115 [2024-11-20 14:27:22,198 INFO L226 Difference]: Without dead ends: 115 [2024-11-20 14:27:22,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:22,199 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:22,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 116 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-20 14:27:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-11-20 14:27:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.404040404040404) internal successors, (139), 110 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2024-11-20 14:27:22,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 22 [2024-11-20 14:27:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:22,202 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2024-11-20 14:27:22,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2024-11-20 14:27:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-20 14:27:22,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:22,203 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, 1, 1, 1] [2024-11-20 14:27:22,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 14:27:22,203 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:22,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -869535611, now seen corresponding path program 1 times [2024-11-20 14:27:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:22,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28667504] [2024-11-20 14:27:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:22,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28667504] [2024-11-20 14:27:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28667504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320353380] [2024-11-20 14:27:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:22,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:22,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:22,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 14:27:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:22,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 14:27:22,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:22,393 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320353380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:22,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:22,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-20 14:27:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151620811] [2024-11-20 14:27:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:22,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:22,394 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-11-20 14:27:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:22,435 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2024-11-20 14:27:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 24 [2024-11-20 14:27:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:22,436 INFO L225 Difference]: With dead ends: 127 [2024-11-20 14:27:22,436 INFO L226 Difference]: Without dead ends: 127 [2024-11-20 14:27:22,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:22,437 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:22,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 136 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-20 14:27:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-20 14:27:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.3565217391304347) internal successors, (156), 126 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2024-11-20 14:27:22,440 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 24 [2024-11-20 14:27:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:22,440 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2024-11-20 14:27:22,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-11-20 14:27:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2024-11-20 14:27:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-20 14:27:22,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:22,441 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:22,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 14:27:22,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:22,641 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:22,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 177724996, now seen corresponding path program 3 times [2024-11-20 14:27:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329218856] [2024-11-20 14:27:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:22,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:22,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329218856] [2024-11-20 14:27:22,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329218856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106890158] [2024-11-20 14:27:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:27:22,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:22,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:22,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 14:27:22,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 14:27:22,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:22,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 14:27:22,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:22,861 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 [2024-11-20 14:27:23,006 INFO L349 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2024-11-20 14:27:23,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2024-11-20 14:27:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:23,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 14:27:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 14:27:23,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:23,382 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 [2024-11-20 14:27:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 14:27:23,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106890158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:23,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:23,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-20 14:27:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818123069] [2024-11-20 14:27:23,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:23,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:27:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:27:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:27:23,682 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2024-11-20 14:27:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:24,499 INFO L93 Difference]: Finished difference Result 181 states and 233 transitions. [2024-11-20 14:27:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 14:27:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) Word has length 24 [2024-11-20 14:27:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:24,501 INFO L225 Difference]: With dead ends: 181 [2024-11-20 14:27:24,501 INFO L226 Difference]: Without dead ends: 181 [2024-11-20 14:27:24,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2024-11-20 14:27:24,503 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 158 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:24,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 296 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:27:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-20 14:27:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 125. [2024-11-20 14:27:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 124 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2024-11-20 14:27:24,507 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 24 [2024-11-20 14:27:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:24,508 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2024-11-20 14:27:24,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2024-11-20 14:27:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2024-11-20 14:27:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-20 14:27:24,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:24,509 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:24,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 14:27:24,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-20 14:27:24,713 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:24,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1894859704, now seen corresponding path program 1 times [2024-11-20 14:27:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172481646] [2024-11-20 14:27:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:25,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172481646] [2024-11-20 14:27:25,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172481646] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:25,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:25,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333468240] [2024-11-20 14:27:25,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:25,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:25,024 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:25,088 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2024-11-20 14:27:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2024-11-20 14:27:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:25,089 INFO L225 Difference]: With dead ends: 124 [2024-11-20 14:27:25,089 INFO L226 Difference]: Without dead ends: 83 [2024-11-20 14:27:25,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:25,090 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:25,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-20 14:27:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-20 14:27:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 82 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2024-11-20 14:27:25,092 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 26 [2024-11-20 14:27:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:25,093 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2024-11-20 14:27:25,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2024-11-20 14:27:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:27:25,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:25,093 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:25,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 14:27:25,094 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:25,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -659672340, now seen corresponding path program 2 times [2024-11-20 14:27:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063036027] [2024-11-20 14:27:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063036027] [2024-11-20 14:27:25,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063036027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:25,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523031892] [2024-11-20 14:27:25,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:25,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:25,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:25,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 14:27:25,263 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:27:25,263 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:25,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 14:27:25,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:25,269 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 6 treesize of output 5 [2024-11-20 14:27:25,316 INFO L349 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2024-11-20 14:27:25,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 21 [2024-11-20 14:27:25,332 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 14:27:25,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 14:27:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 14:27:25,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523031892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:25,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:25,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2024-11-20 14:27:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041136835] [2024-11-20 14:27:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:25,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:27:25,436 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2024-11-20 14:27:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:25,461 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-20 14:27:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:25,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 27 [2024-11-20 14:27:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:25,462 INFO L225 Difference]: With dead ends: 81 [2024-11-20 14:27:25,462 INFO L226 Difference]: Without dead ends: 81 [2024-11-20 14:27:25,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:27:25,464 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:25,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-20 14:27:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-20 14:27:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2024-11-20 14:27:25,467 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 27 [2024-11-20 14:27:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:25,467 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2024-11-20 14:27:25,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2024-11-20 14:27:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2024-11-20 14:27:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:27:25,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:25,468 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:25,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 14:27:25,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 14:27:25,669 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:25,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -659672339, now seen corresponding path program 1 times [2024-11-20 14:27:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:25,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260544063] [2024-11-20 14:27:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260544063] [2024-11-20 14:27:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260544063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280195174] [2024-11-20 14:27:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:25,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:25,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:25,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:25,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 14:27:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:25,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 14:27:25,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:25,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280195174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:25,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:25,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-20 14:27:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191509114] [2024-11-20 14:27:25,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:25,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 14:27:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 14:27:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:25,976 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:26,096 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2024-11-20 14:27:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:27:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2024-11-20 14:27:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:26,099 INFO L225 Difference]: With dead ends: 89 [2024-11-20 14:27:26,099 INFO L226 Difference]: Without dead ends: 89 [2024-11-20 14:27:26,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:27:26,101 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:26,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 122 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-20 14:27:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-20 14:27:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2024-11-20 14:27:26,104 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 27 [2024-11-20 14:27:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:26,104 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2024-11-20 14:27:26,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2024-11-20 14:27:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:27:26,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:26,105 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:26,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 14:27:26,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 14:27:26,306 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:26,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1090844181, now seen corresponding path program 2 times [2024-11-20 14:27:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:26,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611850503] [2024-11-20 14:27:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:26,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611850503] [2024-11-20 14:27:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611850503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633163954] [2024-11-20 14:27:26,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:26,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:26,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:26,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 14:27:26,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:27:26,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:26,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 14:27:26,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:26,859 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 [2024-11-20 14:27:26,865 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 6 treesize of output 5 [2024-11-20 14:27:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:27,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 14:27:27,023 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:27:27,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:27:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:27,038 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-20 14:27:27,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 1 [2024-11-20 14:27:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:27,191 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633163954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:27,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:27,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-20 14:27:27,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560736801] [2024-11-20 14:27:27,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:27,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:27:27,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:27:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:27,193 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2024-11-20 14:27:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:27,323 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2024-11-20 14:27:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 27 [2024-11-20 14:27:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:27,324 INFO L225 Difference]: With dead ends: 130 [2024-11-20 14:27:27,324 INFO L226 Difference]: Without dead ends: 130 [2024-11-20 14:27:27,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:27:27,325 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:27,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 59 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-20 14:27:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-11-20 14:27:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 125 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2024-11-20 14:27:27,328 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 27 [2024-11-20 14:27:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:27,328 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2024-11-20 14:27:27,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2024-11-20 14:27:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2024-11-20 14:27:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-20 14:27:27,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:27,329 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:27,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:27,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:27,530 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:27,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash 543568764, now seen corresponding path program 1 times [2024-11-20 14:27:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:27,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699698537] [2024-11-20 14:27:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:27,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:27,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699698537] [2024-11-20 14:27:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699698537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:27,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384412666] [2024-11-20 14:27:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:27,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:27,631 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:27,689 INFO L93 Difference]: Finished difference Result 171 states and 231 transitions. [2024-11-20 14:27:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 28 [2024-11-20 14:27:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:27,690 INFO L225 Difference]: With dead ends: 171 [2024-11-20 14:27:27,690 INFO L226 Difference]: Without dead ends: 171 [2024-11-20 14:27:27,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:27,691 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:27,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-20 14:27:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2024-11-20 14:27:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.3984375) internal successors, (179), 134 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 179 transitions. [2024-11-20 14:27:27,697 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 179 transitions. Word has length 28 [2024-11-20 14:27:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:27,697 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 179 transitions. [2024-11-20 14:27:27,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 179 transitions. [2024-11-20 14:27:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 14:27:27,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:27,697 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, 1] [2024-11-20 14:27:27,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-20 14:27:27,698 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:27,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1617124536, now seen corresponding path program 1 times [2024-11-20 14:27:27,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211073136] [2024-11-20 14:27:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211073136] [2024-11-20 14:27:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211073136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:27,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:27,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129154768] [2024-11-20 14:27:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:27,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:27,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:27,742 INFO L87 Difference]: Start difference. First operand 135 states and 179 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:27,790 INFO L93 Difference]: Finished difference Result 155 states and 204 transitions. [2024-11-20 14:27:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2024-11-20 14:27:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:27,791 INFO L225 Difference]: With dead ends: 155 [2024-11-20 14:27:27,791 INFO L226 Difference]: Without dead ends: 155 [2024-11-20 14:27:27,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:27,792 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:27,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-20 14:27:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2024-11-20 14:27:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.390625) internal successors, (178), 134 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 178 transitions. [2024-11-20 14:27:27,795 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 178 transitions. Word has length 30 [2024-11-20 14:27:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:27,795 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 178 transitions. [2024-11-20 14:27:27,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 178 transitions. [2024-11-20 14:27:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-20 14:27:27,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:27,796 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:27,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-20 14:27:27,797 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:27,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1430352431, now seen corresponding path program 1 times [2024-11-20 14:27:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979506809] [2024-11-20 14:27:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:27,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979506809] [2024-11-20 14:27:27,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979506809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654608040] [2024-11-20 14:27:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:27,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:27,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 14:27:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:28,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 14:27:28,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:28,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:28,171 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 24 treesize of output 20 [2024-11-20 14:27:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654608040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:28,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-20 14:27:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568510174] [2024-11-20 14:27:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:28,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 14:27:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 14:27:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:28,213 INFO L87 Difference]: Start difference. First operand 135 states and 178 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 14 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) [2024-11-20 14:27:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:28,370 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2024-11-20 14:27:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:27:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 14 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) Word has length 31 [2024-11-20 14:27:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:28,371 INFO L225 Difference]: With dead ends: 150 [2024-11-20 14:27:28,372 INFO L226 Difference]: Without dead ends: 150 [2024-11-20 14:27:28,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:27:28,372 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:28,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 114 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-20 14:27:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2024-11-20 14:27:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 125 states have (on average 1.376) internal successors, (172), 131 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2024-11-20 14:27:28,375 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 31 [2024-11-20 14:27:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:28,375 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2024-11-20 14:27:28,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 14 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) [2024-11-20 14:27:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2024-11-20 14:27:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 14:27:28,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:28,376 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:28,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 14:27:28,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 14:27:28,581 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:28,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1391261449, now seen corresponding path program 1 times [2024-11-20 14:27:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:28,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588508553] [2024-11-20 14:27:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:28,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588508553] [2024-11-20 14:27:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588508553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:28,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:27:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587348002] [2024-11-20 14:27:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:28,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:28,611 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2024-11-20 14:27:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:28,618 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2024-11-20 14:27:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:28,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 32 [2024-11-20 14:27:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:28,620 INFO L225 Difference]: With dead ends: 133 [2024-11-20 14:27:28,620 INFO L226 Difference]: Without dead ends: 133 [2024-11-20 14:27:28,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:28,621 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:28,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-20 14:27:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-20 14:27:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 132 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2024-11-20 14:27:28,625 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 32 [2024-11-20 14:27:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:28,625 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2024-11-20 14:27:28,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2024-11-20 14:27:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2024-11-20 14:27:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 14:27:28,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:28,626 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:28,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-20 14:27:28,626 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:28,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1391252418, now seen corresponding path program 1 times [2024-11-20 14:27:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:28,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94939414] [2024-11-20 14:27:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:27:28,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94939414] [2024-11-20 14:27:28,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94939414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249772517] [2024-11-20 14:27:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:28,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:28,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 14:27:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:28,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 14:27:28,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:28,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:28,996 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 18 [2024-11-20 14:27:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249772517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:29,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 14:27:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334000882] [2024-11-20 14:27:29,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:29,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 14:27:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 14:27:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:27:29,029 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:29,176 INFO L93 Difference]: Finished difference Result 216 states and 275 transitions. [2024-11-20 14:27:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:27:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 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 32 [2024-11-20 14:27:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:29,177 INFO L225 Difference]: With dead ends: 216 [2024-11-20 14:27:29,177 INFO L226 Difference]: Without dead ends: 216 [2024-11-20 14:27:29,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:27:29,178 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 201 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:29,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 87 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-20 14:27:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 201. [2024-11-20 14:27:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.3418367346938775) internal successors, (263), 200 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 263 transitions. [2024-11-20 14:27:29,182 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 263 transitions. Word has length 32 [2024-11-20 14:27:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:29,183 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 263 transitions. [2024-11-20 14:27:29,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 263 transitions. [2024-11-20 14:27:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-20 14:27:29,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:29,184 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:29,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:29,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:29,385 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:29,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash 645939996, now seen corresponding path program 1 times [2024-11-20 14:27:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552555489] [2024-11-20 14:27:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:29,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552555489] [2024-11-20 14:27:29,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552555489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:29,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957922227] [2024-11-20 14:27:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:29,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:29,448 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:29,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 14:27:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:29,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 14:27:29,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:27:29,592 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957922227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:29,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-20 14:27:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864104390] [2024-11-20 14:27:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:29,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:29,594 INFO L87 Difference]: Start difference. First operand 201 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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) [2024-11-20 14:27:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:29,640 INFO L93 Difference]: Finished difference Result 152 states and 191 transitions. [2024-11-20 14:27:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 35 [2024-11-20 14:27:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:29,641 INFO L225 Difference]: With dead ends: 152 [2024-11-20 14:27:29,641 INFO L226 Difference]: Without dead ends: 152 [2024-11-20 14:27:29,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:29,644 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:29,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-20 14:27:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2024-11-20 14:27:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.3076923076923077) internal successors, (187), 147 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2024-11-20 14:27:29,647 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 35 [2024-11-20 14:27:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:29,647 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2024-11-20 14:27:29,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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) [2024-11-20 14:27:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2024-11-20 14:27:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-20 14:27:29,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:29,649 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:29,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:29,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:29,850 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:29,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2022618392, now seen corresponding path program 1 times [2024-11-20 14:27:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304132158] [2024-11-20 14:27:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:27:29,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:29,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304132158] [2024-11-20 14:27:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304132158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477497595] [2024-11-20 14:27:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:29,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:29,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:29,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 14:27:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:30,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 14:27:30,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:27:30,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:27:30,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477497595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:30,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:30,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2024-11-20 14:27:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546999594] [2024-11-20 14:27:30,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:30,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 14:27:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 14:27:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:30,244 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:30,345 INFO L93 Difference]: Finished difference Result 175 states and 214 transitions. [2024-11-20 14:27:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:27:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 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 37 [2024-11-20 14:27:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:30,346 INFO L225 Difference]: With dead ends: 175 [2024-11-20 14:27:30,347 INFO L226 Difference]: Without dead ends: 166 [2024-11-20 14:27:30,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:27:30,347 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:30,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 156 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-20 14:27:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-11-20 14:27:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 161 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2024-11-20 14:27:30,351 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 37 [2024-11-20 14:27:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:30,351 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2024-11-20 14:27:30,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2024-11-20 14:27:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-20 14:27:30,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:30,352 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:30,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:30,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:30,553 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:30,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash -78559658, now seen corresponding path program 1 times [2024-11-20 14:27:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:30,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360047986] [2024-11-20 14:27:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 14:27:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360047986] [2024-11-20 14:27:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360047986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:30,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-20 14:27:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553489864] [2024-11-20 14:27:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:30,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 14:27:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 14:27:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:27:30,724 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:30,828 INFO L93 Difference]: Finished difference Result 161 states and 197 transitions. [2024-11-20 14:27:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:27:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 37 [2024-11-20 14:27:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:30,829 INFO L225 Difference]: With dead ends: 161 [2024-11-20 14:27:30,829 INFO L226 Difference]: Without dead ends: 137 [2024-11-20 14:27:30,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-20 14:27:30,830 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:30,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 69 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-20 14:27:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2024-11-20 14:27:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 114 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2024-11-20 14:27:30,832 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 37 [2024-11-20 14:27:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:30,833 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2024-11-20 14:27:30,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2024-11-20 14:27:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-20 14:27:30,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:30,833 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:30,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-20 14:27:30,834 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:30,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1400396896, now seen corresponding path program 2 times [2024-11-20 14:27:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:30,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098312085] [2024-11-20 14:27:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:30,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-20 14:27:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098312085] [2024-11-20 14:27:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098312085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805170959] [2024-11-20 14:27:31,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:31,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:31,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:31,339 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:31,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 14:27:31,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:27:31,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:31,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 14:27:31,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:31,489 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 10 treesize of output 9 [2024-11-20 14:27:31,494 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 6 treesize of output 5 [2024-11-20 14:27:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:31,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 14:27:31,653 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:27:31,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:27:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:31,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2024-11-20 14:27:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:31,698 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 14:27:31,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 14:27:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-20 14:27:32,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-20 14:27:32,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805170959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:32,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:32,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2024-11-20 14:27:32,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500792524] [2024-11-20 14:27:32,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:32,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:27:32,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:27:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:27:32,983 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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) [2024-11-20 14:27:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:33,741 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2024-11-20 14:27:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:27:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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 45 [2024-11-20 14:27:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:33,743 INFO L225 Difference]: With dead ends: 178 [2024-11-20 14:27:33,743 INFO L226 Difference]: Without dead ends: 178 [2024-11-20 14:27:33,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 14:27:33,744 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 331 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:33,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 180 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:27:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-20 14:27:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2024-11-20 14:27:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 135 transitions. [2024-11-20 14:27:33,747 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 135 transitions. Word has length 45 [2024-11-20 14:27:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:33,747 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 135 transitions. [2024-11-20 14:27:33,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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) [2024-11-20 14:27:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 135 transitions. [2024-11-20 14:27:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-20 14:27:33,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:33,748 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:33,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:33,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:33,948 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:33,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash 315631972, now seen corresponding path program 1 times [2024-11-20 14:27:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49672274] [2024-11-20 14:27:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 14:27:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49672274] [2024-11-20 14:27:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49672274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864980226] [2024-11-20 14:27:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:34,160 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:34,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 14:27:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:34,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 14:27:34,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 14:27:34,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:34,581 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 24 treesize of output 20 [2024-11-20 14:27:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 14:27:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864980226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:34,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2024-11-20 14:27:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660034246] [2024-11-20 14:27:34,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:34,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:27:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:27:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:27:34,669 INFO L87 Difference]: Start difference. First operand 114 states and 135 transitions. Second operand has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:35,117 INFO L93 Difference]: Finished difference Result 196 states and 238 transitions. [2024-11-20 14:27:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:27:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 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 49 [2024-11-20 14:27:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:35,118 INFO L225 Difference]: With dead ends: 196 [2024-11-20 14:27:35,118 INFO L226 Difference]: Without dead ends: 196 [2024-11-20 14:27:35,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 14:27:35,119 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 258 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:35,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 228 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:27:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-20 14:27:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 135. [2024-11-20 14:27:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 134 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2024-11-20 14:27:35,124 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 49 [2024-11-20 14:27:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:35,125 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2024-11-20 14:27:35,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2024-11-20 14:27:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-20 14:27:35,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:35,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:35,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:35,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-20 14:27:35,326 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:35,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2100930607, now seen corresponding path program 1 times [2024-11-20 14:27:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:35,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586847019] [2024-11-20 14:27:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 14:27:35,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:35,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586847019] [2024-11-20 14:27:35,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586847019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:35,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937930857] [2024-11-20 14:27:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:35,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:35,491 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:35,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 14:27:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:35,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 14:27:35,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 14:27:35,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:35,902 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 30 treesize of output 26 [2024-11-20 14:27:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 14:27:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937930857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:36,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:36,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-20 14:27:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630397464] [2024-11-20 14:27:36,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:36,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 14:27:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 14:27:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:27:36,033 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 23 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:36,460 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2024-11-20 14:27:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 14:27:36,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 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 53 [2024-11-20 14:27:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:36,461 INFO L225 Difference]: With dead ends: 148 [2024-11-20 14:27:36,461 INFO L226 Difference]: Without dead ends: 148 [2024-11-20 14:27:36,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 14:27:36,462 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 250 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:36,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 218 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-20 14:27:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2024-11-20 14:27:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 133 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-11-20 14:27:36,465 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 53 [2024-11-20 14:27:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:36,465 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-11-20 14:27:36,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-11-20 14:27:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-20 14:27:36,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:36,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:36,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:36,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-20 14:27:36,667 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:36,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2095884307, now seen corresponding path program 1 times [2024-11-20 14:27:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363531867] [2024-11-20 14:27:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-20 14:27:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363531867] [2024-11-20 14:27:36,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363531867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200308807] [2024-11-20 14:27:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:36,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:36,826 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:36,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 14:27:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:36,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 14:27:36,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 14:27:37,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-20 14:27:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200308807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:37,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:37,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2024-11-20 14:27:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858743367] [2024-11-20 14:27:37,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:37,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 14:27:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:37,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 14:27:37,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:27:37,128 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:37,408 INFO L93 Difference]: Finished difference Result 273 states and 308 transitions. [2024-11-20 14:27:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 14:27:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 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 64 [2024-11-20 14:27:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:37,409 INFO L225 Difference]: With dead ends: 273 [2024-11-20 14:27:37,409 INFO L226 Difference]: Without dead ends: 231 [2024-11-20 14:27:37,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2024-11-20 14:27:37,410 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:37,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 171 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-20 14:27:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 221. [2024-11-20 14:27:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.1278538812785388) internal successors, (247), 220 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 247 transitions. [2024-11-20 14:27:37,414 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 247 transitions. Word has length 64 [2024-11-20 14:27:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:37,414 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 247 transitions. [2024-11-20 14:27:37,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 247 transitions. [2024-11-20 14:27:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-20 14:27:37,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:37,415 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:37,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 14:27:37,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-20 14:27:37,616 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:37,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash 790837879, now seen corresponding path program 2 times [2024-11-20 14:27:37,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:37,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933821124] [2024-11-20 14:27:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:37,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 14:27:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933821124] [2024-11-20 14:27:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933821124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:37,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836549908] [2024-11-20 14:27:37,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:37,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:37,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:37,782 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:37,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 14:27:37,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:27:37,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:37,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 14:27:37,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:38,002 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 15 treesize of output 9 [2024-11-20 14:27:38,008 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 [2024-11-20 14:27:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-20 14:27:38,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-20 14:27:38,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836549908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:38,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:38,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-11-20 14:27:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642084535] [2024-11-20 14:27:38,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:38,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 14:27:38,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 14:27:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:27:38,981 INFO L87 Difference]: Start difference. First operand 221 states and 247 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:39,540 INFO L93 Difference]: Finished difference Result 210 states and 231 transitions. [2024-11-20 14:27:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 14:27:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 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 66 [2024-11-20 14:27:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:39,543 INFO L225 Difference]: With dead ends: 210 [2024-11-20 14:27:39,546 INFO L226 Difference]: Without dead ends: 167 [2024-11-20 14:27:39,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2024-11-20 14:27:39,547 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:39,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 133 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-20 14:27:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 121. [2024-11-20 14:27:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2024-11-20 14:27:39,552 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 66 [2024-11-20 14:27:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:39,552 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2024-11-20 14:27:39,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2024-11-20 14:27:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-20 14:27:39,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:39,553 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:39,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-20 14:27:39,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:39,754 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-20 14:27:39,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1391342249, now seen corresponding path program 2 times [2024-11-20 14:27:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447001308] [2024-11-20 14:27:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-20 14:27:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447001308] [2024-11-20 14:27:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447001308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929653258] [2024-11-20 14:27:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:39,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:39,955 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:27:39,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 14:27:40,079 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:27:40,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:40,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 14:27:40,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-20 14:27:40,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:40,360 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 29 treesize of output 25 [2024-11-20 14:27:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-20 14:27:40,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929653258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:40,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:40,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-11-20 14:27:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666567788] [2024-11-20 14:27:40,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:40,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 14:27:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 14:27:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:27:40,605 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:41,045 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-11-20 14:27:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 14:27:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 85 [2024-11-20 14:27:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:41,045 INFO L225 Difference]: With dead ends: 153 [2024-11-20 14:27:41,045 INFO L226 Difference]: Without dead ends: 0 [2024-11-20 14:27:41,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 14:27:41,046 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:41,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 204 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-20 14:27:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-20 14:27:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-20 14:27:41,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2024-11-20 14:27:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:41,047 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-20 14:27:41,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-20 14:27:41,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-20 14:27:41,050 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-11-20 14:27:41,051 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-11-20 14:27:41,052 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-11-20 14:27:41,053 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-11-20 14:27:41,053 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-11-20 14:27:41,053 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK (0 of 25 remaining) [2024-11-20 14:27:41,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:41,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-20 14:27:41,256 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:41,258 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-20 14:27:41,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:27:41 BoogieIcfgContainer [2024-11-20 14:27:41,261 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-20 14:27:41,261 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-20 14:27:41,261 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-20 14:27:41,261 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-20 14:27:41,262 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:27:11" (3/4) ... [2024-11-20 14:27:41,263 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-20 14:27:41,272 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-11-20 14:27:41,272 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-20 14:27:41,273 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-20 14:27:41,273 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-20 14:27:41,370 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-20 14:27:41,373 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-20 14:27:41,373 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-20 14:27:41,374 INFO L158 Benchmark]: Toolchain (without parser) took 31127.27ms. Allocated memory was 161.5MB in the beginning and 243.3MB in the end (delta: 81.8MB). Free memory was 103.2MB in the beginning and 181.7MB in the end (delta: -78.5MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,374 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 14:27:41,374 INFO L158 Benchmark]: CACSL2BoogieTranslator took 503.02ms. Allocated memory is still 161.5MB. Free memory was 103.2MB in the beginning and 121.7MB in the end (delta: -18.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.59ms. Allocated memory is still 161.5MB. Free memory was 121.7MB in the beginning and 119.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,377 INFO L158 Benchmark]: Boogie Preprocessor took 38.99ms. Allocated memory is still 161.5MB. Free memory was 119.6MB in the beginning and 116.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,377 INFO L158 Benchmark]: RCFGBuilder took 456.38ms. Allocated memory is still 161.5MB. Free memory was 116.8MB in the beginning and 97.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,378 INFO L158 Benchmark]: TraceAbstraction took 29957.72ms. Allocated memory was 161.5MB in the beginning and 243.3MB in the end (delta: 81.8MB). Free memory was 96.5MB in the beginning and 186.6MB in the end (delta: -90.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 14:27:41,378 INFO L158 Benchmark]: Witness Printer took 112.22ms. Allocated memory is still 243.3MB. Free memory was 186.6MB in the beginning and 181.7MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-20 14:27:41,379 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 503.02ms. Allocated memory is still 161.5MB. Free memory was 103.2MB in the beginning and 121.7MB in the end (delta: -18.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.59ms. Allocated memory is still 161.5MB. Free memory was 121.7MB in the beginning and 119.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.99ms. Allocated memory is still 161.5MB. Free memory was 119.6MB in the beginning and 116.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 456.38ms. Allocated memory is still 161.5MB. Free memory was 116.8MB in the beginning and 97.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 29957.72ms. Allocated memory was 161.5MB in the beginning and 243.3MB in the end (delta: 81.8MB). Free memory was 96.5MB in the beginning and 186.6MB in the end (delta: -90.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 112.22ms. Allocated memory is still 243.3MB. Free memory was 186.6MB in the beginning and 181.7MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 66 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 29.9s, OverallIterations: 39, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2448 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2448 mSDsluCounter, 6271 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4762 mSDsCounter, 172 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7119 IncrementalHoareTripleChecker+Invalid, 7291 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 172 mSolverCounterUnsat, 1509 mSDtfsCounter, 7119 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1762 GetRequests, 1239 SyntacticMatches, 20 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=37, InterpolantAutomatonStates: 363, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 39 MinimizatonAttempts, 477 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 1817 NumberOfCodeBlocks, 1623 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 2367 ConstructedInterpolants, 99 QuantifiedInterpolants, 20626 SizeOfPredicates, 105 NumberOfNonLiveVariables, 3114 ConjunctsInSsa, 361 ConjunctsInUnsatCore, 81 InterpolantComputations, 22 PerfectInterpolantSequences, 1201/1735 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 25 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-20 14:27:41,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE