/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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:19:43,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:19:43,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:19:43,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:19:43,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:19:43,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:19:43,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:19:43,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:19:43,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:19:43,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:19:43,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:19:43,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:19:43,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:19:43,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:19:43,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:19:43,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:19:43,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:19:43,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:19:43,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:19:43,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:19:43,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:19:43,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:19:43,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:19:43,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:19:43,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 18:19:43,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 18:19:43,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 18:19:43,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 18:19:43,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 18:19:43,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 18:19:43,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 18:19:43,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 18:19:43,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 18:19:43,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 18:19:43,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 18:19:43,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 18:19:43,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 18:19:43,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 18:19:43,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:19:43,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:19:43,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:19:43,940 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 18:19:43,995 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:19:43,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:19:43,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:19:43,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:19:43,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:19:43,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:19:44,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:19:44,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:19:44,001 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:19:44,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:19:44,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:19:44,003 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:19:44,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:19:44,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:19:44,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:19:44,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:19:44,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:19:44,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:19:44,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:19:44,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:19:44,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:19:44,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:19:44,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:19:44,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:19:44,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:19:44,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:19:44,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:19:44,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:19:44,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:19:44,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:19:44,484 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:19:44,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-10-15 18:19:44,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631bc19ef/031f35ffb970468c9ba7030c307cf2ab/FLAG44bd31930 [2022-10-15 18:19:45,287 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:19:45,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-10-15 18:19:45,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631bc19ef/031f35ffb970468c9ba7030c307cf2ab/FLAG44bd31930 [2022-10-15 18:19:45,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631bc19ef/031f35ffb970468c9ba7030c307cf2ab [2022-10-15 18:19:45,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:19:45,324 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:19:45,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:19:45,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:19:45,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:19:45,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5555ccd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45, skipping insertion in model container [2022-10-15 18:19:45,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:19:45,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:19:45,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-10-15 18:19:45,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:19:45,667 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:19:45,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-10-15 18:19:45,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:19:45,745 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:19:45,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45 WrapperNode [2022-10-15 18:19:45,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:19:45,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:19:45,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:19:45,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:19:45,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,824 INFO L138 Inliner]: procedures = 42, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 152 [2022-10-15 18:19:45,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:19:45,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:19:45,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:19:45,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:19:45,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:19:45,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:19:45,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:19:45,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:19:45,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (1/1) ... [2022-10-15 18:19:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:19:45,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:45,911 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 18:19:45,935 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 18:19:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:19:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:19:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:19:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:19:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:19:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-10-15 18:19:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:19:45,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:19:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:19:46,097 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:19:46,100 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:19:46,670 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:19:46,680 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:19:46,680 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 18:19:46,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:19:46 BoogieIcfgContainer [2022-10-15 18:19:46,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:19:46,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:19:46,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:19:46,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:19:46,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:19:45" (1/3) ... [2022-10-15 18:19:46,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36629f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:19:46, skipping insertion in model container [2022-10-15 18:19:46,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:19:45" (2/3) ... [2022-10-15 18:19:46,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36629f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:19:46, skipping insertion in model container [2022-10-15 18:19:46,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:19:46" (3/3) ... [2022-10-15 18:19:46,696 INFO L112 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-10-15 18:19:46,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:19:46,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-15 18:19:46,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:19:46,822 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;@70b2aae1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:19:46,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-15 18:19:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 75 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:46,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:46,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:46,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2022-10-15 18:19:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279993646] [2022-10-15 18:19:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:47,035 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 18:19:47,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279993646] [2022-10-15 18:19:47,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279993646] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:47,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:47,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311252465] [2022-10-15 18:19:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-15 18:19:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-15 18:19:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 18:19:47,090 INFO L87 Difference]: Start difference. First operand has 76 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 75 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 18:19:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:47,114 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2022-10-15 18:19:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-15 18:19:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 18:19:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:47,131 INFO L225 Difference]: With dead ends: 76 [2022-10-15 18:19:47,132 INFO L226 Difference]: Without dead ends: 74 [2022-10-15 18:19:47,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-15 18:19:47,140 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:47,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-15 18:19:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-10-15 18:19:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.74) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 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 18:19:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-10-15 18:19:47,195 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 4 [2022-10-15 18:19:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:47,196 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-10-15 18:19:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 18:19:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-10-15 18:19:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:47,197 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:47,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:47,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:19:47,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2022-10-15 18:19:47,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:47,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700236655] [2022-10-15 18:19:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:47,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:47,364 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 18:19:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700236655] [2022-10-15 18:19:47,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700236655] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:47,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:47,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:19:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987196510] [2022-10-15 18:19:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:47,371 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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 18:19:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:47,406 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-10-15 18:19:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 18:19:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:47,409 INFO L225 Difference]: With dead ends: 80 [2022-10-15 18:19:47,410 INFO L226 Difference]: Without dead ends: 80 [2022-10-15 18:19:47,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:47,413 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:47,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-15 18:19:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-10-15 18:19:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-10-15 18:19:47,427 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 4 [2022-10-15 18:19:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:47,427 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-10-15 18:19:47,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 18:19:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-10-15 18:19:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:47,428 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:47,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:19:47,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:19:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177530625] [2022-10-15 18:19:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:47,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:47,519 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 18:19:47,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177530625] [2022-10-15 18:19:47,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177530625] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:47,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:47,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238911186] [2022-10-15 18:19:47,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:47,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:47,524 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. 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 18:19:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:47,612 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-10-15 18:19:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:47,613 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 18:19:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:47,615 INFO L225 Difference]: With dead ends: 73 [2022-10-15 18:19:47,615 INFO L226 Difference]: Without dead ends: 73 [2022-10-15 18:19:47,618 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 18:19:47,620 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:47,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-15 18:19:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-15 18:19:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 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 18:19:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-10-15 18:19:47,646 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 4 [2022-10-15 18:19:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:47,647 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-10-15 18:19:47,647 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 18:19:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-10-15 18:19:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:19:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:47,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:19:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:19:47,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:19:47,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:47,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833108779] [2022-10-15 18:19:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:47,857 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 18:19:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:47,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833108779] [2022-10-15 18:19:47,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833108779] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:47,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:47,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84802358] [2022-10-15 18:19:47,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:47,865 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. 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 18:19:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:47,988 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2022-10-15 18:19:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:47,989 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 18:19:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:47,994 INFO L225 Difference]: With dead ends: 76 [2022-10-15 18:19:47,994 INFO L226 Difference]: Without dead ends: 76 [2022-10-15 18:19:47,997 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 18:19:48,004 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:48,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 138 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-15 18:19:48,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-10-15 18:19:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 73 states have internal predecessors, (87), 0 states have call successors, (0), 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 18:19:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-10-15 18:19:48,029 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 4 [2022-10-15 18:19:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:48,031 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-10-15 18:19:48,032 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 18:19:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-10-15 18:19:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:19:48,033 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:48,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:48,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:19:48,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash 264435860, now seen corresponding path program 1 times [2022-10-15 18:19:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089369368] [2022-10-15 18:19:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089369368] [2022-10-15 18:19:48,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089369368] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:48,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437681636] [2022-10-15 18:19:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:48,206 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 18:19:48,214 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 18:19:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 18:19:48,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:48,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437681636] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:48,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:48,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-15 18:19:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879968254] [2022-10-15 18:19:48,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:19:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:19:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:19:48,475 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:48,542 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-10-15 18:19:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:19:48,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:19:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:48,547 INFO L225 Difference]: With dead ends: 87 [2022-10-15 18:19:48,548 INFO L226 Difference]: Without dead ends: 87 [2022-10-15 18:19:48,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:19:48,554 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 23 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:48,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 240 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-15 18:19:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-10-15 18:19:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-10-15 18:19:48,582 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 8 [2022-10-15 18:19:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:48,583 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-10-15 18:19:48,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-10-15 18:19:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:19:48,584 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:48,584 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:48,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:19:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:48,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:19:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103391284] [2022-10-15 18:19:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103391284] [2022-10-15 18:19:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103391284] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259009897] [2022-10-15 18:19:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:49,026 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 18:19:49,047 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 18:19:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:19:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:49,161 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 18:19:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:49,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259009897] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:49,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:49,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:19:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12112232] [2022-10-15 18:19:49,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:19:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:19:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:19:49,325 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 18:19:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:49,460 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-10-15 18:19:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:19:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:19:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:49,463 INFO L225 Difference]: With dead ends: 86 [2022-10-15 18:19:49,463 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:19:49,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:19:49,465 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:49,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 252 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:19:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-10-15 18:19:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.546875) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-10-15 18:19:49,473 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 8 [2022-10-15 18:19:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:49,474 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-10-15 18:19:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 18:19:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-10-15 18:19:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:19:49,475 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:49,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2022-10-15 18:19:49,513 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 18:19:49,690 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,SelfDestructingSolverStorable5 [2022-10-15 18:19:49,691 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457123, now seen corresponding path program 2 times [2022-10-15 18:19:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:49,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082670337] [2022-10-15 18:19:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 18:19:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082670337] [2022-10-15 18:19:49,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082670337] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:49,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:49,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:19:49,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279212232] [2022-10-15 18:19:49,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:19:49,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:19:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:19:49,846 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:49,896 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-10-15 18:19:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:19:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 18:19:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:49,898 INFO L225 Difference]: With dead ends: 85 [2022-10-15 18:19:49,899 INFO L226 Difference]: Without dead ends: 85 [2022-10-15 18:19:49,899 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 18:19:49,901 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:49,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-15 18:19:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-10-15 18:19:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.53125) internal successors, (98), 84 states have internal predecessors, (98), 0 states have call successors, (0), 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 18:19:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2022-10-15 18:19:49,908 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 20 [2022-10-15 18:19:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:49,909 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2022-10-15 18:19:49,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2022-10-15 18:19:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:19:49,910 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:49,911 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:19:49,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 18:19:49,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:19:49,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:49,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483659728] [2022-10-15 18:19:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:49,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483659728] [2022-10-15 18:19:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483659728] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459509713] [2022-10-15 18:19:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:19:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:50,215 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 18:19:50,236 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 18:19:50,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:19:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:19:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:19:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:50,312 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 18:19:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:50,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:50,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459509713] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:50,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:50,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-15 18:19:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492893689] [2022-10-15 18:19:50,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:19:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:19:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:19:50,531 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:50,629 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-10-15 18:19:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:19:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 18:19:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:50,632 INFO L225 Difference]: With dead ends: 86 [2022-10-15 18:19:50,632 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:19:50,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:19:50,633 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:19:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-10-15 18:19:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 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 18:19:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-10-15 18:19:50,639 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 20 [2022-10-15 18:19:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:50,640 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-10-15 18:19:50,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-10-15 18:19:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 18:19:50,641 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:50,642 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:50,683 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 18:19:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:50,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:50,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1143705440, now seen corresponding path program 1 times [2022-10-15 18:19:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562660430] [2022-10-15 18:19:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 18:19:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562660430] [2022-10-15 18:19:50,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562660430] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:50,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:50,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:19:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608263563] [2022-10-15 18:19:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:50,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:19:50,987 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:51,030 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-10-15 18:19:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:51,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 18:19:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:51,031 INFO L225 Difference]: With dead ends: 83 [2022-10-15 18:19:51,031 INFO L226 Difference]: Without dead ends: 83 [2022-10-15 18:19:51,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:19:51,033 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:51,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 60 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-15 18:19:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-10-15 18:19:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.507936507936508) internal successors, (95), 82 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-10-15 18:19:51,037 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 24 [2022-10-15 18:19:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:51,038 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-10-15 18:19:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-10-15 18:19:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 18:19:51,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:51,039 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:51,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 18:19:51,040 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1143702850, now seen corresponding path program 1 times [2022-10-15 18:19:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:51,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652203336] [2022-10-15 18:19:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:51,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652203336] [2022-10-15 18:19:51,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652203336] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:51,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100121694] [2022-10-15 18:19:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:51,160 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 18:19:51,176 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 18:19:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:19:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:51,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:19:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:19:51,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100121694] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:19:51,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:19:51,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-10-15 18:19:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145305920] [2022-10-15 18:19:51,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:19:51,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 18:19:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 18:19:51,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:19:51,388 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 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 18:19:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:51,440 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2022-10-15 18:19:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:19:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 18:19:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:51,443 INFO L225 Difference]: With dead ends: 99 [2022-10-15 18:19:51,443 INFO L226 Difference]: Without dead ends: 99 [2022-10-15 18:19:51,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:19:51,445 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 24 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:51,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 391 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:19:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-10-15 18:19:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-10-15 18:19:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 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 18:19:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-10-15 18:19:51,451 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 24 [2022-10-15 18:19:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:51,451 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-10-15 18:19:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 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 18:19:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-10-15 18:19:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-15 18:19:51,453 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:51,453 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:51,497 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 18:19:51,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:51,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash -20246450, now seen corresponding path program 2 times [2022-10-15 18:19:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598683610] [2022-10-15 18:19:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:51,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:19:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:51,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598683610] [2022-10-15 18:19:51,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598683610] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:51,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:51,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:19:51,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957217174] [2022-10-15 18:19:51,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:51,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:19:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:19:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:19:51,874 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:51,942 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-10-15 18:19:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:19:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-15 18:19:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:51,944 INFO L225 Difference]: With dead ends: 91 [2022-10-15 18:19:51,944 INFO L226 Difference]: Without dead ends: 91 [2022-10-15 18:19:51,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:19:51,946 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:51,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-15 18:19:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-10-15 18:19:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 90 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-10-15 18:19:51,950 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 40 [2022-10-15 18:19:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:51,951 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-10-15 18:19:51,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-10-15 18:19:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-15 18:19:51,953 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:51,953 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:51,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-15 18:19:51,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -20246449, now seen corresponding path program 1 times [2022-10-15 18:19:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:51,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989809628] [2022-10-15 18:19:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:19:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989809628] [2022-10-15 18:19:52,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989809628] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:52,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:52,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:19:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803597695] [2022-10-15 18:19:52,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:19:52,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:19:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:19:52,392 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:52,573 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2022-10-15 18:19:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:19:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-15 18:19:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:52,575 INFO L225 Difference]: With dead ends: 143 [2022-10-15 18:19:52,575 INFO L226 Difference]: Without dead ends: 143 [2022-10-15 18:19:52,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:19:52,577 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 178 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:52,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 126 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-10-15 18:19:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2022-10-15 18:19:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.382608695652174) internal successors, (159), 126 states have internal predecessors, (159), 0 states have call successors, (0), 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 18:19:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-10-15 18:19:52,585 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 40 [2022-10-15 18:19:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:52,586 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-10-15 18:19:52,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-10-15 18:19:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-15 18:19:52,594 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:52,595 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:52,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 18:19:52,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1866564450, now seen corresponding path program 1 times [2022-10-15 18:19:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:52,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801126873] [2022-10-15 18:19:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:19:52,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801126873] [2022-10-15 18:19:52,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801126873] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:52,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:19:52,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:19:52,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615105642] [2022-10-15 18:19:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:19:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:19:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:19:52,849 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:53,002 INFO L93 Difference]: Finished difference Result 209 states and 268 transitions. [2022-10-15 18:19:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:19:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-15 18:19:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:53,004 INFO L225 Difference]: With dead ends: 209 [2022-10-15 18:19:53,004 INFO L226 Difference]: Without dead ends: 209 [2022-10-15 18:19:53,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:19:53,006 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 252 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:53,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 166 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:19:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-10-15 18:19:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 150. [2022-10-15 18:19:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.3768115942028984) internal successors, (190), 149 states have internal predecessors, (190), 0 states have call successors, (0), 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 18:19:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-10-15 18:19:53,014 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 43 [2022-10-15 18:19:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:53,014 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-10-15 18:19:53,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-10-15 18:19:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-15 18:19:53,016 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:53,016 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-15 18:19:53,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -573771921, now seen corresponding path program 1 times [2022-10-15 18:19:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335096239] [2022-10-15 18:19:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:19:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335096239] [2022-10-15 18:19:53,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335096239] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440124437] [2022-10-15 18:19:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:53,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:53,427 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 18:19:53,453 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 18:19:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 18:19:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:53,736 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 18:19:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:19:53,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:19:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440124437] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:19:53,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:19:53,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2022-10-15 18:19:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960521568] [2022-10-15 18:19:53,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:19:53,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 18:19:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:19:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 18:19:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:19:53,766 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:19:54,312 INFO L93 Difference]: Finished difference Result 189 states and 235 transitions. [2022-10-15 18:19:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 18:19:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-10-15 18:19:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:19:54,314 INFO L225 Difference]: With dead ends: 189 [2022-10-15 18:19:54,314 INFO L226 Difference]: Without dead ends: 189 [2022-10-15 18:19:54,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-10-15 18:19:54,315 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 279 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:19:54,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 460 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:19:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-15 18:19:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 150. [2022-10-15 18:19:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.3695652173913044) internal successors, (189), 149 states have internal predecessors, (189), 0 states have call successors, (0), 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 18:19:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2022-10-15 18:19:54,321 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 47 [2022-10-15 18:19:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:19:54,322 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2022-10-15 18:19:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:19:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2022-10-15 18:19:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-15 18:19:54,323 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:19:54,323 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:19:54,367 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 18:19:54,538 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 18:19:54,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:19:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:19:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1410369277, now seen corresponding path program 1 times [2022-10-15 18:19:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:19:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057751550] [2022-10-15 18:19:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:19:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:19:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:19:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057751550] [2022-10-15 18:19:54,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057751550] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:19:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718970034] [2022-10-15 18:19:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:19:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:19:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:19:54,935 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 18:19:54,948 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 18:19:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:19:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 18:19:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:19:55,049 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 18:19:55,060 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 18:19:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:19:55,321 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 18:19:55,340 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:19:55,341 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 18:19:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:19:55,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:01,663 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 18:20:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:02,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718970034] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:02,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:02,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-10-15 18:20:02,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221089588] [2022-10-15 18:20:02,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 18:20:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 18:20:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:20:02,362 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:02,993 INFO L93 Difference]: Finished difference Result 364 states and 439 transitions. [2022-10-15 18:20:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-15 18:20:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-10-15 18:20:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:02,996 INFO L225 Difference]: With dead ends: 364 [2022-10-15 18:20:02,996 INFO L226 Difference]: Without dead ends: 364 [2022-10-15 18:20:02,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-10-15 18:20:02,997 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1012 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:02,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 316 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 243 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-10-15 18:20:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-10-15 18:20:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 308. [2022-10-15 18:20:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 297 states have (on average 1.4242424242424243) internal successors, (423), 307 states have internal predecessors, (423), 0 states have call successors, (0), 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 18:20:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 423 transitions. [2022-10-15 18:20:03,008 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 423 transitions. Word has length 47 [2022-10-15 18:20:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:03,009 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 423 transitions. [2022-10-15 18:20:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 423 transitions. [2022-10-15 18:20:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 18:20:03,010 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:03,010 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:03,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-15 18:20:03,225 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 18:20:03,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash -771696177, now seen corresponding path program 1 times [2022-10-15 18:20:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:03,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481467643] [2022-10-15 18:20:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:03,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481467643] [2022-10-15 18:20:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481467643] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:03,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:20:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601772862] [2022-10-15 18:20:03,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:20:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:20:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:03,441 INFO L87 Difference]: Start difference. First operand 308 states and 423 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:03,537 INFO L93 Difference]: Finished difference Result 327 states and 436 transitions. [2022-10-15 18:20:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:20:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-10-15 18:20:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:03,539 INFO L225 Difference]: With dead ends: 327 [2022-10-15 18:20:03,540 INFO L226 Difference]: Without dead ends: 327 [2022-10-15 18:20:03,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:20:03,541 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 107 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:03,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-10-15 18:20:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 320. [2022-10-15 18:20:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 309 states have (on average 1.3915857605177993) internal successors, (430), 319 states have internal predecessors, (430), 0 states have call successors, (0), 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 18:20:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 430 transitions. [2022-10-15 18:20:03,552 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 430 transitions. Word has length 48 [2022-10-15 18:20:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:03,553 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 430 transitions. [2022-10-15 18:20:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 430 transitions. [2022-10-15 18:20:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-15 18:20:03,554 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:03,555 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-15 18:20:03,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1637411692, now seen corresponding path program 1 times [2022-10-15 18:20:03,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:03,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148714998] [2022-10-15 18:20:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:20:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148714998] [2022-10-15 18:20:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148714998] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771422026] [2022-10-15 18:20:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:03,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:03,909 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 18:20:03,933 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 18:20:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 18:20:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:04,217 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 18:20:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:04,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:20:04,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771422026] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:04,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:20:04,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2022-10-15 18:20:04,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106621564] [2022-10-15 18:20:04,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 18:20:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 18:20:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:20:04,248 INFO L87 Difference]: Start difference. First operand 320 states and 430 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 18:20:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:04,692 INFO L93 Difference]: Finished difference Result 345 states and 455 transitions. [2022-10-15 18:20:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:20:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-10-15 18:20:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:04,695 INFO L225 Difference]: With dead ends: 345 [2022-10-15 18:20:04,695 INFO L226 Difference]: Without dead ends: 345 [2022-10-15 18:20:04,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-10-15 18:20:04,697 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 256 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:04,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 457 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:20:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-10-15 18:20:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2022-10-15 18:20:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 302 states have (on average 1.380794701986755) internal successors, (417), 312 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 417 transitions. [2022-10-15 18:20:04,721 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 417 transitions. Word has length 49 [2022-10-15 18:20:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:04,721 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 417 transitions. [2022-10-15 18:20:04,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 18:20:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 417 transitions. [2022-10-15 18:20:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-15 18:20:04,722 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:04,722 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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 18:20:04,760 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 18:20:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:04,938 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 601026853, now seen corresponding path program 1 times [2022-10-15 18:20:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:04,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353106115] [2022-10-15 18:20:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:05,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353106115] [2022-10-15 18:20:05,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353106115] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:05,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:05,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:20:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851354853] [2022-10-15 18:20:05,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:05,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:20:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:20:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:05,063 INFO L87 Difference]: Start difference. First operand 313 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:05,159 INFO L93 Difference]: Finished difference Result 374 states and 486 transitions. [2022-10-15 18:20:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:20:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-10-15 18:20:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:05,163 INFO L225 Difference]: With dead ends: 374 [2022-10-15 18:20:05,163 INFO L226 Difference]: Without dead ends: 374 [2022-10-15 18:20:05,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:20:05,164 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 99 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:05,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 247 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-10-15 18:20:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 311. [2022-10-15 18:20:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 300 states have (on average 1.3666666666666667) internal successors, (410), 310 states have internal predecessors, (410), 0 states have call successors, (0), 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 18:20:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 410 transitions. [2022-10-15 18:20:05,175 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 410 transitions. Word has length 54 [2022-10-15 18:20:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:05,176 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 410 transitions. [2022-10-15 18:20:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 410 transitions. [2022-10-15 18:20:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-15 18:20:05,177 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:05,177 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:05,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-15 18:20:05,177 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1689719867, now seen corresponding path program 1 times [2022-10-15 18:20:05,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:05,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270185872] [2022-10-15 18:20:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:05,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:05,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270185872] [2022-10-15 18:20:05,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270185872] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112946196] [2022-10-15 18:20:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:05,436 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 18:20:05,438 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 18:20:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 18:20:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:05,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:05,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-10-15 18:20:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112946196] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:05,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:05,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-10-15 18:20:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574829122] [2022-10-15 18:20:05,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 18:20:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 18:20:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-10-15 18:20:05,879 INFO L87 Difference]: Start difference. First operand 311 states and 410 transitions. Second operand has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 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 18:20:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:07,002 INFO L93 Difference]: Finished difference Result 1186 states and 1643 transitions. [2022-10-15 18:20:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-15 18:20:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-10-15 18:20:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:07,010 INFO L225 Difference]: With dead ends: 1186 [2022-10-15 18:20:07,010 INFO L226 Difference]: Without dead ends: 1186 [2022-10-15 18:20:07,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2022-10-15 18:20:07,012 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 957 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:07,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1089 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:20:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-10-15 18:20:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 326. [2022-10-15 18:20:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 317 states have (on average 1.3438485804416405) internal successors, (426), 325 states have internal predecessors, (426), 0 states have call successors, (0), 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 18:20:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 426 transitions. [2022-10-15 18:20:07,031 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 426 transitions. Word has length 54 [2022-10-15 18:20:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:07,031 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 426 transitions. [2022-10-15 18:20:07,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 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 18:20:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 426 transitions. [2022-10-15 18:20:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-15 18:20:07,032 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:07,032 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 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 18:20:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:07,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:07,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash -511333877, now seen corresponding path program 1 times [2022-10-15 18:20:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:07,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970381178] [2022-10-15 18:20:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:07,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970381178] [2022-10-15 18:20:07,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970381178] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:07,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:07,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:20:07,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639012631] [2022-10-15 18:20:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:20:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:07,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:20:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:20:07,361 INFO L87 Difference]: Start difference. First operand 326 states and 426 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 18:20:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:07,423 INFO L93 Difference]: Finished difference Result 464 states and 604 transitions. [2022-10-15 18:20:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:20:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 57 [2022-10-15 18:20:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:07,427 INFO L225 Difference]: With dead ends: 464 [2022-10-15 18:20:07,427 INFO L226 Difference]: Without dead ends: 464 [2022-10-15 18:20:07,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:07,428 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 152 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:20:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-10-15 18:20:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 336. [2022-10-15 18:20:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 327 states have (on average 1.3241590214067278) internal successors, (433), 335 states have internal predecessors, (433), 0 states have call successors, (0), 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 18:20:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 433 transitions. [2022-10-15 18:20:07,440 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 433 transitions. Word has length 57 [2022-10-15 18:20:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:07,441 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 433 transitions. [2022-10-15 18:20:07,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 18:20:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 433 transitions. [2022-10-15 18:20:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-15 18:20:07,442 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:07,442 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:07,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-15 18:20:07,443 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1313239180, now seen corresponding path program 2 times [2022-10-15 18:20:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366675810] [2022-10-15 18:20:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-10-15 18:20:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366675810] [2022-10-15 18:20:07,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366675810] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870833626] [2022-10-15 18:20:07,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:20:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:07,867 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 18:20:07,888 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 18:20:07,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:20:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:20:07,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:20:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:08,231 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 18:20:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:08,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:08,405 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-15 18:20:08,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-10-15 18:20:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:08,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870833626] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:08,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:08,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 11] total 25 [2022-10-15 18:20:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577172843] [2022-10-15 18:20:08,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:08,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 18:20:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:08,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 18:20:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:20:08,499 INFO L87 Difference]: Start difference. First operand 336 states and 433 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 18:20:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:13,912 INFO L93 Difference]: Finished difference Result 1499 states and 1924 transitions. [2022-10-15 18:20:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-10-15 18:20:13,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 58 [2022-10-15 18:20:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:13,928 INFO L225 Difference]: With dead ends: 1499 [2022-10-15 18:20:13,929 INFO L226 Difference]: Without dead ends: 1499 [2022-10-15 18:20:13,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3868 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1191, Invalid=11241, Unknown=0, NotChecked=0, Total=12432 [2022-10-15 18:20:13,936 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 1805 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 3858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:13,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 3557 Invalid, 3858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-10-15 18:20:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-10-15 18:20:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 469. [2022-10-15 18:20:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 460 states have (on average 1.315217391304348) internal successors, (605), 468 states have internal predecessors, (605), 0 states have call successors, (0), 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 18:20:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 605 transitions. [2022-10-15 18:20:13,959 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 605 transitions. Word has length 58 [2022-10-15 18:20:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:13,959 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 605 transitions. [2022-10-15 18:20:13,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 18:20:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 605 transitions. [2022-10-15 18:20:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-15 18:20:13,960 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:13,960 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:14,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:14,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash 933470686, now seen corresponding path program 1 times [2022-10-15 18:20:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797581507] [2022-10-15 18:20:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-10-15 18:20:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:14,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797581507] [2022-10-15 18:20:14,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797581507] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:14,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:14,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:20:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396725289] [2022-10-15 18:20:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:14,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:20:14,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:20:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:20:14,232 INFO L87 Difference]: Start difference. First operand 469 states and 605 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:14,242 INFO L93 Difference]: Finished difference Result 485 states and 621 transitions. [2022-10-15 18:20:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:20:14,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-10-15 18:20:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:14,246 INFO L225 Difference]: With dead ends: 485 [2022-10-15 18:20:14,246 INFO L226 Difference]: Without dead ends: 485 [2022-10-15 18:20:14,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:20:14,247 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:14,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:20:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-10-15 18:20:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 484. [2022-10-15 18:20:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 475 states have (on average 1.305263157894737) internal successors, (620), 483 states have internal predecessors, (620), 0 states have call successors, (0), 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 18:20:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 620 transitions. [2022-10-15 18:20:14,262 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 620 transitions. Word has length 59 [2022-10-15 18:20:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:14,262 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 620 transitions. [2022-10-15 18:20:14,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 620 transitions. [2022-10-15 18:20:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-15 18:20:14,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:14,264 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 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 18:20:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-10-15 18:20:14,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1107430060, now seen corresponding path program 1 times [2022-10-15 18:20:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:14,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794883226] [2022-10-15 18:20:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:20:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794883226] [2022-10-15 18:20:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794883226] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:14,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:20:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658070096] [2022-10-15 18:20:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:20:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:20:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:14,621 INFO L87 Difference]: Start difference. First operand 484 states and 620 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:14,681 INFO L93 Difference]: Finished difference Result 483 states and 619 transitions. [2022-10-15 18:20:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:20:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-10-15 18:20:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:14,686 INFO L225 Difference]: With dead ends: 483 [2022-10-15 18:20:14,686 INFO L226 Difference]: Without dead ends: 480 [2022-10-15 18:20:14,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:14,687 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 42 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:14,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 149 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-10-15 18:20:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-10-15 18:20:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 472 states have (on average 1.2690677966101696) internal successors, (599), 479 states have internal predecessors, (599), 0 states have call successors, (0), 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 18:20:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 599 transitions. [2022-10-15 18:20:14,703 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 599 transitions. Word has length 60 [2022-10-15 18:20:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:14,703 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 599 transitions. [2022-10-15 18:20:14,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 599 transitions. [2022-10-15 18:20:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-15 18:20:14,704 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:14,705 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:14,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-15 18:20:14,705 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1399328473, now seen corresponding path program 1 times [2022-10-15 18:20:14,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:14,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188418653] [2022-10-15 18:20:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188418653] [2022-10-15 18:20:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188418653] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172916453] [2022-10-15 18:20:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:14,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:14,856 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 18:20:14,883 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 18:20:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:20:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:15,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172916453] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:15,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:15,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-10-15 18:20:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683347724] [2022-10-15 18:20:15,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:20:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:20:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:20:15,043 INFO L87 Difference]: Start difference. First operand 480 states and 599 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:15,141 INFO L93 Difference]: Finished difference Result 502 states and 609 transitions. [2022-10-15 18:20:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:20:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-10-15 18:20:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:15,145 INFO L225 Difference]: With dead ends: 502 [2022-10-15 18:20:15,145 INFO L226 Difference]: Without dead ends: 502 [2022-10-15 18:20:15,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:20:15,146 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 146 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:15,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 269 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-10-15 18:20:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2022-10-15 18:20:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 448 states have (on average 1.2477678571428572) internal successors, (559), 455 states have internal predecessors, (559), 0 states have call successors, (0), 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 18:20:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 559 transitions. [2022-10-15 18:20:15,160 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 559 transitions. Word has length 61 [2022-10-15 18:20:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:15,177 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 559 transitions. [2022-10-15 18:20:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 559 transitions. [2022-10-15 18:20:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-15 18:20:15,178 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:15,178 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 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 18:20:15,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:15,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-10-15 18:20:15,391 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash -934037609, now seen corresponding path program 1 times [2022-10-15 18:20:15,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:15,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651234211] [2022-10-15 18:20:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651234211] [2022-10-15 18:20:15,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651234211] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:15,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:15,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:20:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38380156] [2022-10-15 18:20:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:20:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:20:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:20:15,521 INFO L87 Difference]: Start difference. First operand 456 states and 559 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:15,583 INFO L93 Difference]: Finished difference Result 611 states and 753 transitions. [2022-10-15 18:20:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:20:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-10-15 18:20:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:15,588 INFO L225 Difference]: With dead ends: 611 [2022-10-15 18:20:15,588 INFO L226 Difference]: Without dead ends: 611 [2022-10-15 18:20:15,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:20:15,589 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 78 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:15,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 196 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:20:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-10-15 18:20:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 454. [2022-10-15 18:20:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 447 states have (on average 1.2348993288590604) internal successors, (552), 453 states have internal predecessors, (552), 0 states have call successors, (0), 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 18:20:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 552 transitions. [2022-10-15 18:20:15,604 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 552 transitions. Word has length 62 [2022-10-15 18:20:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:15,605 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 552 transitions. [2022-10-15 18:20:15,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 552 transitions. [2022-10-15 18:20:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 18:20:15,606 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:15,606 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-10-15 18:20:15,606 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1109610333, now seen corresponding path program 1 times [2022-10-15 18:20:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:15,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603791516] [2022-10-15 18:20:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603791516] [2022-10-15 18:20:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603791516] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:15,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:15,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:20:15,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995330961] [2022-10-15 18:20:15,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:15,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:20:15,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:20:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:20:15,736 INFO L87 Difference]: Start difference. First operand 454 states and 552 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:15,757 INFO L93 Difference]: Finished difference Result 453 states and 546 transitions. [2022-10-15 18:20:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:20:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-10-15 18:20:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:15,760 INFO L225 Difference]: With dead ends: 453 [2022-10-15 18:20:15,760 INFO L226 Difference]: Without dead ends: 453 [2022-10-15 18:20:15,761 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 18:20:15,761 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:15,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 55 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:20:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-10-15 18:20:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2022-10-15 18:20:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 447 states have (on average 1.221476510067114) internal successors, (546), 452 states have internal predecessors, (546), 0 states have call successors, (0), 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 18:20:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 546 transitions. [2022-10-15 18:20:15,774 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 546 transitions. Word has length 63 [2022-10-15 18:20:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:15,774 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 546 transitions. [2022-10-15 18:20:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 546 transitions. [2022-10-15 18:20:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 18:20:15,776 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:15,776 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-15 18:20:15,776 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1109610334, now seen corresponding path program 1 times [2022-10-15 18:20:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262899855] [2022-10-15 18:20:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:15,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:15,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262899855] [2022-10-15 18:20:15,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262899855] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:15,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:15,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:20:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371759603] [2022-10-15 18:20:15,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:20:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:20:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:15,923 INFO L87 Difference]: Start difference. First operand 453 states and 546 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:16,058 INFO L93 Difference]: Finished difference Result 737 states and 898 transitions. [2022-10-15 18:20:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:20:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-10-15 18:20:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:16,063 INFO L225 Difference]: With dead ends: 737 [2022-10-15 18:20:16,063 INFO L226 Difference]: Without dead ends: 692 [2022-10-15 18:20:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:20:16,064 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 168 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:16,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 202 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-10-15 18:20:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 545. [2022-10-15 18:20:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 539 states have (on average 1.2430426716141) internal successors, (670), 544 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 670 transitions. [2022-10-15 18:20:16,081 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 670 transitions. Word has length 63 [2022-10-15 18:20:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:16,081 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 670 transitions. [2022-10-15 18:20:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 670 transitions. [2022-10-15 18:20:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 18:20:16,082 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:16,083 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-10-15 18:20:16,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash 98493084, now seen corresponding path program 1 times [2022-10-15 18:20:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402269265] [2022-10-15 18:20:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:16,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402269265] [2022-10-15 18:20:16,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402269265] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:16,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:16,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:20:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525000858] [2022-10-15 18:20:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:20:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:20:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:20:16,348 INFO L87 Difference]: Start difference. First operand 545 states and 670 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:16,520 INFO L93 Difference]: Finished difference Result 666 states and 812 transitions. [2022-10-15 18:20:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:20:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-10-15 18:20:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:16,524 INFO L225 Difference]: With dead ends: 666 [2022-10-15 18:20:16,524 INFO L226 Difference]: Without dead ends: 666 [2022-10-15 18:20:16,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:20:16,525 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 90 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:16,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 150 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:20:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-10-15 18:20:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 618. [2022-10-15 18:20:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 612 states have (on average 1.2369281045751634) internal successors, (757), 617 states have internal predecessors, (757), 0 states have call successors, (0), 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 18:20:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 757 transitions. [2022-10-15 18:20:16,540 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 757 transitions. Word has length 63 [2022-10-15 18:20:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:16,541 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 757 transitions. [2022-10-15 18:20:16,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 18:20:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 757 transitions. [2022-10-15 18:20:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 18:20:16,542 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:16,542 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:16,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-10-15 18:20:16,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1467608126, now seen corresponding path program 1 times [2022-10-15 18:20:16,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173518745] [2022-10-15 18:20:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:16,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-10-15 18:20:16,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173518745] [2022-10-15 18:20:16,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173518745] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590267995] [2022-10-15 18:20:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:16,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:16,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:20:16,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:20:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:17,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 18:20:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:17,317 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 18:20:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-10-15 18:20:17,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:17,519 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-15 18:20:17,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-10-15 18:20:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-10-15 18:20:17,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590267995] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:17,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:17,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 26 [2022-10-15 18:20:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707432746] [2022-10-15 18:20:17,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-15 18:20:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-15 18:20:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:20:17,617 INFO L87 Difference]: Start difference. First operand 618 states and 757 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:22,850 INFO L93 Difference]: Finished difference Result 1801 states and 2236 transitions. [2022-10-15 18:20:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-10-15 18:20:22,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-10-15 18:20:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:22,861 INFO L225 Difference]: With dead ends: 1801 [2022-10-15 18:20:22,861 INFO L226 Difference]: Without dead ends: 1794 [2022-10-15 18:20:22,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1024, Invalid=8876, Unknown=0, NotChecked=0, Total=9900 [2022-10-15 18:20:22,865 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2035 mSDsluCounter, 4228 mSDsCounter, 0 mSdLazyCounter, 4133 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 4550 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:22,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 4550 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4133 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-10-15 18:20:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-10-15 18:20:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 719. [2022-10-15 18:20:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 713 states have (on average 1.238429172510519) internal successors, (883), 718 states have internal predecessors, (883), 0 states have call successors, (0), 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 18:20:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 883 transitions. [2022-10-15 18:20:22,896 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 883 transitions. Word has length 64 [2022-10-15 18:20:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 883 transitions. [2022-10-15 18:20:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 883 transitions. [2022-10-15 18:20:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-15 18:20:22,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:22,897 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:22,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-10-15 18:20:23,113 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -291774811, now seen corresponding path program 2 times [2022-10-15 18:20:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527275935] [2022-10-15 18:20:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-10-15 18:20:23,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:23,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527275935] [2022-10-15 18:20:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527275935] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263771756] [2022-10-15 18:20:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:20:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:23,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:20:23,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 18:20:23,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:20:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:20:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 18:20:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-10-15 18:20:23,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:20:23,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263771756] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:23,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:20:23,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-10-15 18:20:23,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486915517] [2022-10-15 18:20:23,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:20:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:20:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-10-15 18:20:23,633 INFO L87 Difference]: Start difference. First operand 719 states and 883 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:23,958 INFO L93 Difference]: Finished difference Result 903 states and 1075 transitions. [2022-10-15 18:20:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:20:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-10-15 18:20:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:23,963 INFO L225 Difference]: With dead ends: 903 [2022-10-15 18:20:23,963 INFO L226 Difference]: Without dead ends: 894 [2022-10-15 18:20:23,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-10-15 18:20:23,964 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 254 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:23,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 206 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:20:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-10-15 18:20:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 731. [2022-10-15 18:20:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 728 states have (on average 1.2005494505494505) internal successors, (874), 730 states have internal predecessors, (874), 0 states have call successors, (0), 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 18:20:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 874 transitions. [2022-10-15 18:20:23,989 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 874 transitions. Word has length 68 [2022-10-15 18:20:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:23,990 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 874 transitions. [2022-10-15 18:20:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 874 transitions. [2022-10-15 18:20:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-15 18:20:23,994 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:23,995 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:24,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:24,208 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1565124450, now seen corresponding path program 3 times [2022-10-15 18:20:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827095110] [2022-10-15 18:20:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827095110] [2022-10-15 18:20:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827095110] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269416725] [2022-10-15 18:20:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:20:24,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:24,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:24,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:20:24,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 18:20:24,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 18:20:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:20:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 18:20:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:24,753 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 18:20:24,759 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 18:20:24,949 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 11 treesize of output 7 [2022-10-15 18:20:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:20:24,976 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 18:20:24,983 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:20:24,983 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 18:20:25,115 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:20:25,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-10-15 18:20:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-10-15 18:20:25,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:26,055 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 13 [2022-10-15 18:20:26,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 18:20:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-10-15 18:20:26,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269416725] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:26,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:26,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-10-15 18:20:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225504736] [2022-10-15 18:20:26,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 18:20:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 18:20:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-10-15 18:20:26,954 INFO L87 Difference]: Start difference. First operand 731 states and 874 transitions. Second operand has 23 states, 22 states have (on average 4.045454545454546) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 18:20:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:28,412 INFO L93 Difference]: Finished difference Result 1635 states and 1976 transitions. [2022-10-15 18:20:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 18:20:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.045454545454546) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 73 [2022-10-15 18:20:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:28,422 INFO L225 Difference]: With dead ends: 1635 [2022-10-15 18:20:28,423 INFO L226 Difference]: Without dead ends: 1635 [2022-10-15 18:20:28,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 18:20:28,424 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 2687 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:28,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 879 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 562 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2022-10-15 18:20:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-10-15 18:20:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 789. [2022-10-15 18:20:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 786 states have (on average 1.2086513994910941) internal successors, (950), 788 states have internal predecessors, (950), 0 states have call successors, (0), 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 18:20:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 950 transitions. [2022-10-15 18:20:28,450 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 950 transitions. Word has length 73 [2022-10-15 18:20:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:28,451 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 950 transitions. [2022-10-15 18:20:28,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.045454545454546) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 18:20:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 950 transitions. [2022-10-15 18:20:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-15 18:20:28,453 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:28,453 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:28,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 18:20:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-10-15 18:20:28,668 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -842555901, now seen corresponding path program 2 times [2022-10-15 18:20:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254465374] [2022-10-15 18:20:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-10-15 18:20:29,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254465374] [2022-10-15 18:20:29,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254465374] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:20:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624805960] [2022-10-15 18:20:29,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:20:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:20:29,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:20:29,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 18:20:29,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:20:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:20:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:20:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:20:29,309 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 18:20:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:20:29,443 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 18:20:29,451 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:20:29,452 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 18:20:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:29,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:20:36,163 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 18:20:36,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-10-15 18:20:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 18:20:36,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624805960] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:20:36,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:20:36,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-10-15 18:20:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172709541] [2022-10-15 18:20:36,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:20:36,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-15 18:20:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-15 18:20:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-10-15 18:20:36,453 INFO L87 Difference]: Start difference. First operand 789 states and 950 transitions. Second operand has 28 states, 27 states have (on average 5.222222222222222) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:37,192 INFO L93 Difference]: Finished difference Result 1575 states and 1906 transitions. [2022-10-15 18:20:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 18:20:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.222222222222222) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-10-15 18:20:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:37,199 INFO L225 Difference]: With dead ends: 1575 [2022-10-15 18:20:37,199 INFO L226 Difference]: Without dead ends: 1575 [2022-10-15 18:20:37,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 18:20:37,200 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 1695 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:37,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1695 Valid, 1452 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 729 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-10-15 18:20:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-10-15 18:20:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1561. [2022-10-15 18:20:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1558 states have (on average 1.2233632862644417) internal successors, (1906), 1560 states have internal predecessors, (1906), 0 states have call successors, (0), 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 18:20:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 1906 transitions. [2022-10-15 18:20:37,237 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 1906 transitions. Word has length 75 [2022-10-15 18:20:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:37,237 INFO L495 AbstractCegarLoop]: Abstraction has 1561 states and 1906 transitions. [2022-10-15 18:20:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.222222222222222) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:20:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 1906 transitions. [2022-10-15 18:20:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-10-15 18:20:37,239 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:37,239 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:37,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-10-15 18:20:37,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:20:37,453 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1041108520, now seen corresponding path program 1 times [2022-10-15 18:20:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:37,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326680501] [2022-10-15 18:20:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:20:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-10-15 18:20:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:20:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326680501] [2022-10-15 18:20:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326680501] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:20:37,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:20:37,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:20:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199469752] [2022-10-15 18:20:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:20:37,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:20:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:20:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:20:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:20:37,558 INFO L87 Difference]: Start difference. First operand 1561 states and 1906 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 18:20:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:20:37,576 INFO L93 Difference]: Finished difference Result 1605 states and 1950 transitions. [2022-10-15 18:20:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:20:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 81 [2022-10-15 18:20:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:20:37,584 INFO L225 Difference]: With dead ends: 1605 [2022-10-15 18:20:37,584 INFO L226 Difference]: Without dead ends: 1605 [2022-10-15 18:20:37,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:20:37,586 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:20:37,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 154 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:20:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2022-10-15 18:20:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1605. [2022-10-15 18:20:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1602 states have (on average 1.2172284644194757) internal successors, (1950), 1604 states have internal predecessors, (1950), 0 states have call successors, (0), 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 18:20:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1950 transitions. [2022-10-15 18:20:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1950 transitions. Word has length 81 [2022-10-15 18:20:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:20:37,625 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 1950 transitions. [2022-10-15 18:20:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 18:20:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1950 transitions. [2022-10-15 18:20:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-15 18:20:37,627 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:20:37,628 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:20:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-10-15 18:20:37,628 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-15 18:20:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:20:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash -127144173, now seen corresponding path program 1 times [2022-10-15 18:20:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:20:37,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116571375] [2022-10-15 18:20:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:20:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:20:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat