/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-memory-linkedlists/ll_append_rec-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:59:07,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:59:07,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:59:07,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:59:07,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:59:07,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:59:07,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:59:07,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:59:07,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:59:07,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:59:07,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:59:07,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:59:07,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:59:07,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:59:07,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:59:07,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:59:07,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:59:07,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:59:07,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:59:07,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:59:07,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:59:07,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:59:07,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:59:07,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:59:07,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:59:07,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:59:07,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:59:07,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:59:07,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:59:07,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:59:07,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:59:07,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:59:07,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:59:07,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:59:07,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:59:07,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:59:07,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:59:07,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:59:07,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:59:07,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:59:07,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:59:07,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:59:07,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:59:07,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:59:07,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:59:07,749 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:59:07,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:59:07,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:59:07,750 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:59:07,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:59:07,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:59:07,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:59:07,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:59:07,751 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:59:07,751 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:59:07,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:59:07,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:59:07,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:59:07,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:59:07,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:59:07,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:59:07,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:59:07,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:59:07,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:59:07,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:59:07,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:59:07,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:59:07,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:59:08,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:59:08,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:59:08,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:59:08,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:59:08,189 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:59:08,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-linkedlists/ll_append_rec-alloca-2.i [2022-10-15 17:59:08,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503bbf644/cae3f44db9704a73a2875aa652b97eaf/FLAG6ccfa9bd1 [2022-10-15 17:59:08,985 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:59:08,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-linkedlists/ll_append_rec-alloca-2.i [2022-10-15 17:59:09,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503bbf644/cae3f44db9704a73a2875aa652b97eaf/FLAG6ccfa9bd1 [2022-10-15 17:59:09,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503bbf644/cae3f44db9704a73a2875aa652b97eaf [2022-10-15 17:59:09,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:59:09,289 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:59:09,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:59:09,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:59:09,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:59:09,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:09,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37220a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09, skipping insertion in model container [2022-10-15 17:59:09,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:09,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:59:09,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:59:09,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:59:09,795 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:59:09,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:59:09,920 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:59:09,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09 WrapperNode [2022-10-15 17:59:09,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:59:09,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:59:09,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:59:09,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:59:09,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:09,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,000 INFO L138 Inliner]: procedures = 115, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-10-15 17:59:10,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:59:10,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:59:10,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:59:10,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:59:10,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,029 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:59:10,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:59:10,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:59:10,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:59:10,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (1/1) ... [2022-10-15 17:59:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:59:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:10,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:59:10,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:59:10,154 INFO L130 BoogieDeclarations]: Found specification of procedure new_ll [2022-10-15 17:59:10,154 INFO L138 BoogieDeclarations]: Found implementation of procedure new_ll [2022-10-15 17:59:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:59:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-15 17:59:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:59:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 17:59:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure length [2022-10-15 17:59:10,156 INFO L138 BoogieDeclarations]: Found implementation of procedure length [2022-10-15 17:59:10,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:59:10,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:59:10,156 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-10-15 17:59:10,156 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-10-15 17:59:10,254 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:59:10,257 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:59:10,630 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:59:10,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:59:10,646 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-15 17:59:10,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:59:10 BoogieIcfgContainer [2022-10-15 17:59:10,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:59:10,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:59:10,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:59:10,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:59:10,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:59:09" (1/3) ... [2022-10-15 17:59:10,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4888a0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:59:10, skipping insertion in model container [2022-10-15 17:59:10,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:59:09" (2/3) ... [2022-10-15 17:59:10,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4888a0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:59:10, skipping insertion in model container [2022-10-15 17:59:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:59:10" (3/3) ... [2022-10-15 17:59:10,664 INFO L112 eAbstractionObserver]: Analyzing ICFG ll_append_rec-alloca-2.i [2022-10-15 17:59:10,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:59:10,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-10-15 17:59:10,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:59:10,791 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@75207876, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:59:10,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-10-15 17:59:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 25 states have (on average 1.6) internal successors, (40), 36 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:59:10,812 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:10,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:59:10,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1695213, now seen corresponding path program 1 times [2022-10-15 17:59:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252329296] [2022-10-15 17:59:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:10,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252329296] [2022-10-15 17:59:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252329296] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:11,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:11,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:11,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161891161] [2022-10-15 17:59:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:11,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:11,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:11,158 INFO L87 Difference]: Start difference. First operand has 46 states, 25 states have (on average 1.6) internal successors, (40), 36 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:11,239 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-10-15 17:59:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-10-15 17:59:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:11,251 INFO L225 Difference]: With dead ends: 47 [2022-10-15 17:59:11,252 INFO L226 Difference]: Without dead ends: 44 [2022-10-15 17:59:11,254 INFO L412 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 [2022-10-15 17:59:11,259 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:11,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-15 17:59:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-15 17:59:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-10-15 17:59:11,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 4 [2022-10-15 17:59:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:11,305 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-10-15 17:59:11,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-10-15 17:59:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:59:11,307 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:11,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:11,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:59:11,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:11,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1035044286, now seen corresponding path program 1 times [2022-10-15 17:59:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:11,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420973512] [2022-10-15 17:59:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:11,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420973512] [2022-10-15 17:59:11,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420973512] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:11,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:11,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904362392] [2022-10-15 17:59:11,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:11,498 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:11,548 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-10-15 17:59:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:11,549 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:59:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:11,553 INFO L225 Difference]: With dead ends: 45 [2022-10-15 17:59:11,553 INFO L226 Difference]: Without dead ends: 45 [2022-10-15 17:59:11,554 INFO L412 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 [2022-10-15 17:59:11,556 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:11,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-15 17:59:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-10-15 17:59:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.5) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-10-15 17:59:11,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 7 [2022-10-15 17:59:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:11,570 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-10-15 17:59:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-10-15 17:59:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:59:11,571 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:11,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:59:11,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1035044285, now seen corresponding path program 1 times [2022-10-15 17:59:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495366202] [2022-10-15 17:59:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:11,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:11,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495366202] [2022-10-15 17:59:11,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495366202] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:11,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:11,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:59:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509780288] [2022-10-15 17:59:11,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:11,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:59:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:59:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:59:11,724 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:11,764 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-10-15 17:59:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:59:11,765 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:59:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:11,767 INFO L225 Difference]: With dead ends: 42 [2022-10-15 17:59:11,767 INFO L226 Difference]: Without dead ends: 42 [2022-10-15 17:59:11,768 INFO L412 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 [2022-10-15 17:59:11,769 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:11,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:59:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-15 17:59:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-10-15 17:59:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-10-15 17:59:11,782 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 7 [2022-10-15 17:59:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:11,783 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-10-15 17:59:11,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:59:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-10-15 17:59:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:59:11,786 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:11,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:11,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:59:11,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 563712764, now seen corresponding path program 1 times [2022-10-15 17:59:11,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:11,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134751329] [2022-10-15 17:59:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:11,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:12,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134751329] [2022-10-15 17:59:12,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134751329] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:12,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:12,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:59:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364163507] [2022-10-15 17:59:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:59:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:59:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:59:12,065 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:12,372 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-10-15 17:59:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:59:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-10-15 17:59:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:12,375 INFO L225 Difference]: With dead ends: 60 [2022-10-15 17:59:12,375 INFO L226 Difference]: Without dead ends: 60 [2022-10-15 17:59:12,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:59:12,378 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:12,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 132 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-15 17:59:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-10-15 17:59:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 38 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-15 17:59:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-10-15 17:59:12,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 13 [2022-10-15 17:59:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:12,395 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-10-15 17:59:12,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-10-15 17:59:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:59:12,399 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:12,400 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:59:12,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -674900510, now seen corresponding path program 1 times [2022-10-15 17:59:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907529682] [2022-10-15 17:59:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:12,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907529682] [2022-10-15 17:59:12,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907529682] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:12,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:12,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:59:12,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71698850] [2022-10-15 17:59:12,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:59:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:59:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:12,555 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:12,681 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-10-15 17:59:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:59:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-10-15 17:59:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:12,684 INFO L225 Difference]: With dead ends: 57 [2022-10-15 17:59:12,684 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 17:59:12,684 INFO L412 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 [2022-10-15 17:59:12,686 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:12,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 17:59:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-10-15 17:59:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-15 17:59:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-10-15 17:59:12,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 13 [2022-10-15 17:59:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:12,698 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-10-15 17:59:12,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-10-15 17:59:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:59:12,700 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:12,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:12,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:59:12,701 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -239912693, now seen corresponding path program 1 times [2022-10-15 17:59:12,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:12,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979535779] [2022-10-15 17:59:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:12,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:12,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979535779] [2022-10-15 17:59:12,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979535779] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:12,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:12,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:59:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053759579] [2022-10-15 17:59:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:59:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:59:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:59:12,977 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:13,113 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-10-15 17:59:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:59:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 17:59:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:13,115 INFO L225 Difference]: With dead ends: 59 [2022-10-15 17:59:13,116 INFO L226 Difference]: Without dead ends: 59 [2022-10-15 17:59:13,116 INFO L412 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 [2022-10-15 17:59:13,117 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 61 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-15 17:59:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-10-15 17:59:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-15 17:59:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-10-15 17:59:13,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 17 [2022-10-15 17:59:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:13,127 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-10-15 17:59:13,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 17:59:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-10-15 17:59:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:59:13,129 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:13,129 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:59:13,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash 66271450, now seen corresponding path program 1 times [2022-10-15 17:59:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677928768] [2022-10-15 17:59:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:13,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:13,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:13,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677928768] [2022-10-15 17:59:13,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677928768] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962271905] [2022-10-15 17:59:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:13,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:13,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:13,618 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) [2022-10-15 17:59:13,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:59:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 17:59:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:13,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:14,044 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-15 17:59:14,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:14,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:14,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962271905] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:14,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:14,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2022-10-15 17:59:14,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104266415] [2022-10-15 17:59:14,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:59:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:59:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:59:14,145 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:59:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:14,352 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-10-15 17:59:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:59:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-10-15 17:59:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:14,354 INFO L225 Difference]: With dead ends: 61 [2022-10-15 17:59:14,355 INFO L226 Difference]: Without dead ends: 61 [2022-10-15 17:59:14,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:59:14,358 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:14,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-10-15 17:59:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-15 17:59:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-10-15 17:59:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-10-15 17:59:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-10-15 17:59:14,387 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 21 [2022-10-15 17:59:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:14,391 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-10-15 17:59:14,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:59:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-10-15 17:59:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:59:14,392 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:14,393 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:14,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:14,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:14,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2105609213, now seen corresponding path program 1 times [2022-10-15 17:59:14,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056997938] [2022-10-15 17:59:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:14,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:14,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056997938] [2022-10-15 17:59:15,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056997938] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911720530] [2022-10-15 17:59:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:15,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:15,155 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) [2022-10-15 17:59:15,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:59:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 17:59:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:15,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:15,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:15,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:15,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-10-15 17:59:15,513 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:59:15,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:15,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:19,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911720530] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:19,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:19,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2022-10-15 17:59:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53364527] [2022-10-15 17:59:19,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:19,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:59:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:59:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:59:19,702 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:59:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:20,006 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-10-15 17:59:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:59:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-10-15 17:59:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:20,008 INFO L225 Difference]: With dead ends: 60 [2022-10-15 17:59:20,008 INFO L226 Difference]: Without dead ends: 60 [2022-10-15 17:59:20,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:20,009 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:20,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 150 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-10-15 17:59:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-15 17:59:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-10-15 17:59:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 41 states have internal predecessors, (44), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-10-15 17:59:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-10-15 17:59:20,017 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 25 [2022-10-15 17:59:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:20,017 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-10-15 17:59:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:59:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-10-15 17:59:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 17:59:20,019 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:20,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:20,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-15 17:59:20,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting lengthErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1526722377, now seen corresponding path program 1 times [2022-10-15 17:59:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442163710] [2022-10-15 17:59:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:20,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:20,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:20,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442163710] [2022-10-15 17:59:20,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442163710] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:20,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:20,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-10-15 17:59:20,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534737328] [2022-10-15 17:59:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:20,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 17:59:20,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 17:59:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:59:20,468 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:59:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:20,917 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-10-15 17:59:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 17:59:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-10-15 17:59:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:20,919 INFO L225 Difference]: With dead ends: 71 [2022-10-15 17:59:20,919 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 17:59:20,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:59:20,921 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:20,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 190 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:59:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 17:59:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-10-15 17:59:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 45 states have internal predecessors, (48), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-10-15 17:59:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-10-15 17:59:20,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 19 [2022-10-15 17:59:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:20,929 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-10-15 17:59:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:59:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-10-15 17:59:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:59:20,931 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:20,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:20,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:59:20,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2102288884, now seen corresponding path program 1 times [2022-10-15 17:59:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960089222] [2022-10-15 17:59:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:21,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:21,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960089222] [2022-10-15 17:59:21,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960089222] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:21,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:21,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:59:21,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710190703] [2022-10-15 17:59:21,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:21,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:59:21,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:59:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:59:21,089 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:59:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:21,421 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-10-15 17:59:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:59:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-10-15 17:59:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:21,423 INFO L225 Difference]: With dead ends: 81 [2022-10-15 17:59:21,423 INFO L226 Difference]: Without dead ends: 81 [2022-10-15 17:59:21,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:59:21,425 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:21,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 119 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-15 17:59:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2022-10-15 17:59:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.302325581395349) internal successors, (56), 50 states have internal predecessors, (56), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-10-15 17:59:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-10-15 17:59:21,432 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 21 [2022-10-15 17:59:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:21,433 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-10-15 17:59:21,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:59:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-10-15 17:59:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:59:21,434 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:21,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:21,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 17:59:21,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2102288885, now seen corresponding path program 1 times [2022-10-15 17:59:21,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:21,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564244752] [2022-10-15 17:59:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:59:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564244752] [2022-10-15 17:59:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564244752] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951991324] [2022-10-15 17:59:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:21,791 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) [2022-10-15 17:59:21,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:59:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-15 17:59:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:21,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:22,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951991324] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:22,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:22,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-10-15 17:59:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15692916] [2022-10-15 17:59:22,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 17:59:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 17:59:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:59:22,449 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 23 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-15 17:59:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:22,943 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-10-15 17:59:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 17:59:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 21 [2022-10-15 17:59:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:22,946 INFO L225 Difference]: With dead ends: 89 [2022-10-15 17:59:22,946 INFO L226 Difference]: Without dead ends: 89 [2022-10-15 17:59:22,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-10-15 17:59:22,948 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 52 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:22,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 433 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 409 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-10-15 17:59:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-15 17:59:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-10-15 17:59:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 49 states have internal predecessors, (53), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-10-15 17:59:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-10-15 17:59:22,955 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 21 [2022-10-15 17:59:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:22,955 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-10-15 17:59:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-15 17:59:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-10-15 17:59:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 17:59:22,957 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:22,958 INFO L195 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] [2022-10-15 17:59:23,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:23,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:23,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1116591720, now seen corresponding path program 1 times [2022-10-15 17:59:23,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:23,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129543840] [2022-10-15 17:59:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-15 17:59:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-15 17:59:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:23,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129543840] [2022-10-15 17:59:23,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129543840] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:23,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:23,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:59:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006429456] [2022-10-15 17:59:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:23,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:59:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:59:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:59:23,254 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:59:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:23,397 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-10-15 17:59:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:59:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-10-15 17:59:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:23,399 INFO L225 Difference]: With dead ends: 75 [2022-10-15 17:59:23,400 INFO L226 Difference]: Without dead ends: 61 [2022-10-15 17:59:23,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:59:23,401 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:23,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:59:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-15 17:59:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-10-15 17:59:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 41 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2022-10-15 17:59:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-10-15 17:59:23,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 22 [2022-10-15 17:59:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:23,407 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-10-15 17:59:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 17:59:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-10-15 17:59:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:59:23,409 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:23,409 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:23,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 17:59:23,410 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2114406446, now seen corresponding path program 2 times [2022-10-15 17:59:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698812507] [2022-10-15 17:59:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:23,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698812507] [2022-10-15 17:59:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698812507] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404887420] [2022-10-15 17:59:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:24,175 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) [2022-10-15 17:59:24,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:59:24,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:24,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:24,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:59:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:24,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:24,474 INFO L356 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2022-10-15 17:59:24,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 23 [2022-10-15 17:59:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:24,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404887420] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:24,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:24,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-10-15 17:59:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602381116] [2022-10-15 17:59:24,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 17:59:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 17:59:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:59:24,710 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:24,987 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-10-15 17:59:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:59:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-10-15 17:59:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:24,989 INFO L225 Difference]: With dead ends: 66 [2022-10-15 17:59:24,989 INFO L226 Difference]: Without dead ends: 66 [2022-10-15 17:59:24,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:59:24,991 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:24,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 90 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 163 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-10-15 17:59:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-15 17:59:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-10-15 17:59:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 44 states have internal predecessors, (49), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-10-15 17:59:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-10-15 17:59:24,997 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2022-10-15 17:59:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:24,997 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-10-15 17:59:24,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-15 17:59:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-10-15 17:59:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:59:24,999 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:24,999 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:25,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:25,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:25,215 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2114406445, now seen corresponding path program 2 times [2022-10-15 17:59:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124165215] [2022-10-15 17:59:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124165215] [2022-10-15 17:59:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124165215] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570584098] [2022-10-15 17:59:25,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:25,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:25,943 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) [2022-10-15 17:59:25,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:59:26,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:26,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-15 17:59:26,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:26,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:26,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:26,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:26,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:26,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 19 [2022-10-15 17:59:26,369 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-10-15 17:59:26,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-10-15 17:59:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:26,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:26,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570584098] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:26,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:26,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-10-15 17:59:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988413371] [2022-10-15 17:59:26,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 17:59:26,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 17:59:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:59:26,627 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:27,033 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-10-15 17:59:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:59:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2022-10-15 17:59:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:27,035 INFO L225 Difference]: With dead ends: 68 [2022-10-15 17:59:27,035 INFO L226 Difference]: Without dead ends: 68 [2022-10-15 17:59:27,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:59:27,039 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:27,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 125 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 173 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-10-15 17:59:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-15 17:59:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-10-15 17:59:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.263157894736842) internal successors, (48), 44 states have internal predecessors, (48), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-10-15 17:59:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-10-15 17:59:27,050 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2022-10-15 17:59:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:27,051 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-10-15 17:59:27,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 17:59:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-10-15 17:59:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:59:27,059 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:27,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:27,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:27,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 17:59:27,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1967829859, now seen corresponding path program 1 times [2022-10-15 17:59:27,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:27,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015574398] [2022-10-15 17:59:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:27,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:59:28,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:28,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015574398] [2022-10-15 17:59:28,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015574398] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:28,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506070071] [2022-10-15 17:59:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:28,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:28,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:28,113 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) [2022-10-15 17:59:28,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:59:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 60 conjunts are in the unsatisfiable core [2022-10-15 17:59:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:28,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:28,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-15 17:59:28,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-15 17:59:28,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:59:28,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:59:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:59:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:29,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506070071] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:29,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:29,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 34 [2022-10-15 17:59:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432075543] [2022-10-15 17:59:29,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 17:59:29,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 17:59:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:59:29,155 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 17:59:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:30,289 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2022-10-15 17:59:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 17:59:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-10-15 17:59:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:30,291 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:59:30,291 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:59:30,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2022-10-15 17:59:30,293 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:30,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 218 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:59:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:59:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-10-15 17:59:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 55 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2022-10-15 17:59:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-10-15 17:59:30,300 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 25 [2022-10-15 17:59:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:30,301 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-10-15 17:59:30,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 17:59:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-10-15 17:59:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-15 17:59:30,303 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:30,303 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:30,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 17:59:30,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:30,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1664041486, now seen corresponding path program 3 times [2022-10-15 17:59:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849516236] [2022-10-15 17:59:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:59:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:31,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-15 17:59:32,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849516236] [2022-10-15 17:59:32,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849516236] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33815019] [2022-10-15 17:59:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:59:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:32,914 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) [2022-10-15 17:59:32,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:59:33,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-15 17:59:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 17:59:33,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:33,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:34,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:34,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:59:34,047 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-10-15 17:59:34,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 18 treesize of output 35 [2022-10-15 17:59:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-15 17:59:34,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:34,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33815019] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:34,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:34,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-10-15 17:59:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766243876] [2022-10-15 17:59:34,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:34,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 17:59:34,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 17:59:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:59:34,371 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-15 17:59:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:34,842 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-10-15 17:59:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:59:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-10-15 17:59:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:34,843 INFO L225 Difference]: With dead ends: 82 [2022-10-15 17:59:34,844 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 17:59:34,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-10-15 17:59:34,845 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 108 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-10-15 17:59:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 17:59:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-10-15 17:59:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.24) internal successors, (62), 58 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (18), 12 states have call predecessors, (18), 9 states have call successors, (18) [2022-10-15 17:59:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-10-15 17:59:34,851 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 41 [2022-10-15 17:59:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:34,851 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-10-15 17:59:34,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-15 17:59:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-10-15 17:59:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:59:34,853 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:34,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:34,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:59:35,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:35,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting lengthErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -328481361, now seen corresponding path program 1 times [2022-10-15 17:59:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:35,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6288357] [2022-10-15 17:59:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:35,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-15 17:59:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:35,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6288357] [2022-10-15 17:59:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6288357] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:59:35,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:59:35,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-15 17:59:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130059101] [2022-10-15 17:59:35,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:59:35,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:59:35,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:59:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:59:35,262 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:59:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:35,477 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-10-15 17:59:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:59:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-10-15 17:59:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:35,479 INFO L225 Difference]: With dead ends: 81 [2022-10-15 17:59:35,479 INFO L226 Difference]: Without dead ends: 77 [2022-10-15 17:59:35,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:59:35,480 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:35,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 127 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:59:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-10-15 17:59:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2022-10-15 17:59:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 54 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-10-15 17:59:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-10-15 17:59:35,486 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 27 [2022-10-15 17:59:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-10-15 17:59:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:59:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-10-15 17:59:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 17:59:35,488 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:35,488 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-15 17:59:35,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting new_llErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -460303669, now seen corresponding path program 3 times [2022-10-15 17:59:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716328813] [2022-10-15 17:59:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:36,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:37,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:59:37,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716328813] [2022-10-15 17:59:37,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716328813] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477864835] [2022-10-15 17:59:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:59:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:37,837 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) [2022-10-15 17:59:37,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:59:38,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-10-15 17:59:38,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:38,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-15 17:59:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:38,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:38,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:38,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:59:38,686 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 17:59:38,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 31 [2022-10-15 17:59:38,730 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-10-15 17:59:38,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 65 [2022-10-15 17:59:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:38,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:47,022 WARN L233 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 17:59:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477864835] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:47,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:59:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-10-15 17:59:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182547522] [2022-10-15 17:59:47,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 17:59:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 17:59:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-10-15 17:59:47,027 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 25 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:48,253 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-10-15 17:59:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 17:59:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2022-10-15 17:59:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:48,256 INFO L225 Difference]: With dead ends: 77 [2022-10-15 17:59:48,256 INFO L226 Difference]: Without dead ends: 77 [2022-10-15 17:59:48,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 17:59:48,260 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 91 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:48,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 104 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 216 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-10-15 17:59:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-10-15 17:59:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2022-10-15 17:59:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.1875) internal successors, (57), 54 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-10-15 17:59:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-10-15 17:59:48,273 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 37 [2022-10-15 17:59:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:48,274 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-10-15 17:59:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-15 17:59:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-10-15 17:59:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:59:48,276 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:48,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:48,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-15 17:59:48,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-15 17:59:48,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 315489173, now seen corresponding path program 2 times [2022-10-15 17:59:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598014854] [2022-10-15 17:59:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:49,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:49,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 17:59:49,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598014854] [2022-10-15 17:59:49,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598014854] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467493005] [2022-10-15 17:59:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:59:49,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:49,192 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) [2022-10-15 17:59:49,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 17:59:49,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:59:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:59:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-15 17:59:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:49,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:49,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-15 17:59:49,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-10-15 17:59:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:49,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:50,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467493005] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:50,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:50,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 24 [2022-10-15 17:59:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239010953] [2022-10-15 17:59:50,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 17:59:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 17:59:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-10-15 17:59:50,079 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-15 17:59:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:51,408 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-10-15 17:59:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-15 17:59:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 33 [2022-10-15 17:59:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:51,410 INFO L225 Difference]: With dead ends: 92 [2022-10-15 17:59:51,410 INFO L226 Difference]: Without dead ends: 92 [2022-10-15 17:59:51,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 17:59:51,412 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:51,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 984 Invalid, 0 Unknown, 34 Unchecked, 0.9s Time] [2022-10-15 17:59:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-15 17:59:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2022-10-15 17:59:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 60 states have internal predecessors, (65), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2022-10-15 17:59:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-10-15 17:59:51,418 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 33 [2022-10-15 17:59:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:51,418 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-10-15 17:59:51,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-15 17:59:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-10-15 17:59:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:59:51,419 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:51,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:51,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-15 17:59:51,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:51,628 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash 315489174, now seen corresponding path program 1 times [2022-10-15 17:59:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:51,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755507111] [2022-10-15 17:59:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:52,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:59:52,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:59:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755507111] [2022-10-15 17:59:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755507111] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:59:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692933213] [2022-10-15 17:59:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:52,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:59:52,783 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) [2022-10-15 17:59:52,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 17:59:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-15 17:59:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:59:52,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-15 17:59:53,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-15 17:59:53,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-15 17:59:53,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-10-15 17:59:53,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:59:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:53,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:59:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:59:54,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692933213] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:59:54,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:59:54,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 41 [2022-10-15 17:59:54,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971259692] [2022-10-15 17:59:54,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:59:54,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-10-15 17:59:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:59:54,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-10-15 17:59:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2022-10-15 17:59:54,796 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 42 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-15 17:59:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:59:56,537 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2022-10-15 17:59:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-10-15 17:59:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-10-15 17:59:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:59:56,545 INFO L225 Difference]: With dead ends: 103 [2022-10-15 17:59:56,546 INFO L226 Difference]: Without dead ends: 103 [2022-10-15 17:59:56,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-10-15 17:59:56,548 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 86 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:59:56,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 704 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 953 Invalid, 0 Unknown, 62 Unchecked, 1.0s Time] [2022-10-15 17:59:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-10-15 17:59:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2022-10-15 17:59:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 63 states have internal predecessors, (67), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (17), 14 states have call predecessors, (17), 10 states have call successors, (17) [2022-10-15 17:59:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-10-15 17:59:56,558 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 33 [2022-10-15 17:59:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:59:56,558 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-10-15 17:59:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 29 states have internal predecessors, (61), 11 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-15 17:59:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-10-15 17:59:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 17:59:56,559 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:59:56,560 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-15 17:59:56,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-10-15 17:59:56,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:59:56,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [new_llErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, new_llErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 17:59:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:59:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash 695470530, now seen corresponding path program 4 times [2022-10-15 17:59:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:59:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425812559] [2022-10-15 17:59:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:59:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:59:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 17:59:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:59:58,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 17:59:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat