/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:16:54,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:16:54,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:16:54,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:16:54,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:16:54,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:16:54,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:16:54,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:16:54,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:16:54,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:16:54,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:16:54,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:16:54,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:16:54,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:16:54,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:16:54,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:16:54,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:16:54,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:16:54,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:16:54,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:16:54,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:16:54,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:16:54,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:16:54,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:16:54,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:16:54,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:16:54,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:16:54,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:16:54,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:16:54,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:16:54,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:16:54,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:16:54,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:16:54,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:16:54,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:16:54,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:16:54,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:16:54,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:16:54,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:16:54,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:16:54,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:16:54,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:16:55,027 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:16:55,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:16:55,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:16:55,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:16:55,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:16:55,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:16:55,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:16:55,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:16:55,030 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:16:55,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:16:55,031 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:16:55,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:16:55,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:16:55,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:16:55,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:16:55,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:16:55,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:16:55,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:16:55,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:16:55,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:16:55,034 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:16:55,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:16:55,035 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:16:55,035 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:16:55,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:16:55,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:16:55,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:16:55,309 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:16:55,310 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:16:55,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2023-04-02 01:16:56,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:16:56,629 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:16:56,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2023-04-02 01:16:56,634 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6af1c7de/5553f53472ae47a895922eaf78d579d5/FLAG96f78086a [2023-04-02 01:16:56,647 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6af1c7de/5553f53472ae47a895922eaf78d579d5 [2023-04-02 01:16:56,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:16:56,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:16:56,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:16:56,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:16:56,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:16:56,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ab325c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56, skipping insertion in model container [2023-04-02 01:16:56,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:16:56,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:16:56,818 WARN L247 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/linear_search.c[383,396] [2023-04-02 01:16:56,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:16:56,851 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:16:56,862 WARN L247 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/linear_search.c[383,396] [2023-04-02 01:16:56,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:16:56,889 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:16:56,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56 WrapperNode [2023-04-02 01:16:56,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:16:56,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:16:56,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:16:56,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:16:56,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:16:56,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:16:56,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:16:56,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:16:56,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (1/1) ... [2023-04-02 01:16:56,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:16:56,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:16:56,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:16:56,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2023-04-02 01:16:56,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:16:56,995 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:16:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:16:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:16:57,090 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:16:57,093 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:16:57,296 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:16:57,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:16:57,301 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 01:16:57,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:16:57 BoogieIcfgContainer [2023-04-02 01:16:57,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:16:57,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:16:57,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:16:57,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:16:57,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:16:56" (1/3) ... [2023-04-02 01:16:57,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385953b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:16:57, skipping insertion in model container [2023-04-02 01:16:57,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:16:56" (2/3) ... [2023-04-02 01:16:57,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385953b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:16:57, skipping insertion in model container [2023-04-02 01:16:57,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:16:57" (3/3) ... [2023-04-02 01:16:57,309 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search.c [2023-04-02 01:16:57,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:16:57,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:16:57,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:16:57,419 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3cca3956, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:16:57,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:16:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:16:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:16:57,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:16:57,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:16:57,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:16:57,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:16:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1001129449, now seen corresponding path program 1 times [2023-04-02 01:16:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:16:57,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419472232] [2023-04-02 01:16:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:16:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:16:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:16:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:57,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:16:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:16:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:16:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419472232] [2023-04-02 01:16:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419472232] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:16:57,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:16:57,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:16:57,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170272937] [2023-04-02 01:16:57,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:16:57,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:16:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:16:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:16:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:16:57,761 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:16:57,945 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-04-02 01:16:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:16:57,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-02 01:16:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:16:57,953 INFO L225 Difference]: With dead ends: 52 [2023-04-02 01:16:57,954 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 01:16:57,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:16:57,959 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:16:57,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 23 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:16:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 01:16:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-02 01:16:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:16:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-04-02 01:16:57,992 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2023-04-02 01:16:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:16:57,993 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-04-02 01:16:57,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-04-02 01:16:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:16:57,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:16:57,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:16:57,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:16:57,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:16:57,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:16:57,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2092261110, now seen corresponding path program 1 times [2023-04-02 01:16:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:16:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114880214] [2023-04-02 01:16:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:16:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:16:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:16:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:16:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:16:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:16:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114880214] [2023-04-02 01:16:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114880214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:16:58,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:16:58,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 01:16:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912130026] [2023-04-02 01:16:58,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:16:58,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:16:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:16:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:16:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:16:58,386 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:16:58,582 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-04-02 01:16:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:16:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-04-02 01:16:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:16:58,593 INFO L225 Difference]: With dead ends: 35 [2023-04-02 01:16:58,593 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 01:16:58,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:16:58,595 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:16:58,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:16:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 01:16:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-02 01:16:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:16:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-02 01:16:58,601 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-04-02 01:16:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:16:58,602 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-02 01:16:58,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-02 01:16:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:16:58,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:16:58,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:16:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:16:58,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:16:58,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:16:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -349450775, now seen corresponding path program 1 times [2023-04-02 01:16:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:16:58,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436392074] [2023-04-02 01:16:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:58,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:16:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:16:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:16:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:16:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:16:58,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:16:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436392074] [2023-04-02 01:16:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436392074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:16:58,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:16:58,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 01:16:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074554940] [2023-04-02 01:16:58,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:16:58,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:16:58,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:16:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:16:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:16:58,923 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:16:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:16:59,213 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-02 01:16:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:16:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-04-02 01:16:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:16:59,216 INFO L225 Difference]: With dead ends: 40 [2023-04-02 01:16:59,216 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 01:16:59,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:16:59,220 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:16:59,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 26 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:16:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 01:16:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-04-02 01:16:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:16:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 01:16:59,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-04-02 01:16:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:16:59,233 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 01:16:59,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:16:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 01:16:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:16:59,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:16:59,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:16:59,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:16:59,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:16:59,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:16:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash 33102019, now seen corresponding path program 1 times [2023-04-02 01:16:59,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:16:59,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563159594] [2023-04-02 01:16:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:59,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:16:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:16:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:16:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:16:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:16:59,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:16:59,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563159594] [2023-04-02 01:16:59,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563159594] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:16:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:16:59,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:16:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726281003] [2023-04-02 01:16:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:16:59,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:16:59,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:16:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:16:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:16:59,444 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:16:59,578 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-04-02 01:16:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:16:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-04-02 01:16:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:16:59,581 INFO L225 Difference]: With dead ends: 50 [2023-04-02 01:16:59,582 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 01:16:59,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:16:59,588 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:16:59,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 20 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:16:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 01:16:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-04-02 01:16:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:16:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-04-02 01:16:59,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 29 [2023-04-02 01:16:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:16:59,604 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-04-02 01:16:59,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:16:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-04-02 01:16:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:16:59,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:16:59,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:16:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:16:59,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:16:59,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:16:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 291267457, now seen corresponding path program 1 times [2023-04-02 01:16:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:16:59,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96797389] [2023-04-02 01:16:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:16:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:16:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:16:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:16:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:16:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:16:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:16:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96797389] [2023-04-02 01:16:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96797389] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:16:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738341088] [2023-04-02 01:16:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:16:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:16:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:16:59,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:16:59,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:17:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:00,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:17:00,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:17:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:00,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:17:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:00,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738341088] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:17:00,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:17:00,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 6] total 15 [2023-04-02 01:17:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292453616] [2023-04-02 01:17:00,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:17:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:17:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:17:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:17:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:17:00,380 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 01:17:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:17:00,897 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-04-02 01:17:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 01:17:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-04-02 01:17:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:17:00,899 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:17:00,899 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 01:17:00,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2023-04-02 01:17:00,900 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:17:00,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 35 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:17:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 01:17:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2023-04-02 01:17:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:17:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-02 01:17:00,917 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 29 [2023-04-02 01:17:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:17:00,918 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-02 01:17:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 01:17:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-02 01:17:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:17:00,920 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:17:00,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 01:17:00,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:17:01,128 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 [2023-04-02 01:17:01,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:17:01,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:17:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -868933029, now seen corresponding path program 1 times [2023-04-02 01:17:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:17:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163015158] [2023-04-02 01:17:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:17:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:17:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:01,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:17:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:17:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:01,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:17:01,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163015158] [2023-04-02 01:17:01,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163015158] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:17:01,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814298472] [2023-04-02 01:17:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:01,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:17:01,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:17:01,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:17:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:01,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:17:01,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:17:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:01,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:17:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814298472] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:17:01,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:17:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-02 01:17:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471605515] [2023-04-02 01:17:01,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:17:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:17:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:17:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:17:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:17:01,438 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:17:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:17:01,748 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2023-04-02 01:17:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:17:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-04-02 01:17:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:17:01,749 INFO L225 Difference]: With dead ends: 83 [2023-04-02 01:17:01,749 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 01:17:01,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:17:01,750 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:17:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 60 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:17:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 01:17:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-04-02 01:17:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:17:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-04-02 01:17:01,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 33 [2023-04-02 01:17:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:17:01,768 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-04-02 01:17:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:17:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-04-02 01:17:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:17:01,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:17:01,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 01:17:01,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:17:01,975 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 [2023-04-02 01:17:01,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:17:01,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:17:01,976 INFO L85 PathProgramCache]: Analyzing trace with hash -610767591, now seen corresponding path program 2 times [2023-04-02 01:17:01,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:17:01,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808607169] [2023-04-02 01:17:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:01,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:17:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:02,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:17:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:17:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:02,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:17:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:02,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:17:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808607169] [2023-04-02 01:17:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808607169] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:17:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694900715] [2023-04-02 01:17:02,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:17:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:17:02,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:17:02,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:17:02,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-02 01:17:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:17:02,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 01:17:02,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:17:03,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-04-02 01:17:03,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-04-02 01:17:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:17:04,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:17:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:17:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694900715] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:17:05,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:17:05,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 7] total 31 [2023-04-02 01:17:05,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16504780] [2023-04-02 01:17:05,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:17:05,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 01:17:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:17:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 01:17:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:17:05,116 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 7 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 01:17:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:17:12,618 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2023-04-02 01:17:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-02 01:17:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 7 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 33 [2023-04-02 01:17:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:17:12,620 INFO L225 Difference]: With dead ends: 158 [2023-04-02 01:17:12,620 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 01:17:12,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1235, Invalid=5085, Unknown=0, NotChecked=0, Total=6320 [2023-04-02 01:17:12,623 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 258 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:17:12,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 53 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 01:17:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 01:17:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2023-04-02 01:17:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:17:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2023-04-02 01:17:12,635 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 33 [2023-04-02 01:17:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:17:12,635 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2023-04-02 01:17:12,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 7 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 01:17:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2023-04-02 01:17:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:17:12,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:17:12,636 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 01:17:12,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:17:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:12,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:17:12,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:17:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1003794601, now seen corresponding path program 1 times [2023-04-02 01:17:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:17:12,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694482871] [2023-04-02 01:17:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:17:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:17:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:17:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:17:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:14,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:17:14,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694482871] [2023-04-02 01:17:14,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694482871] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:17:14,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227808724] [2023-04-02 01:17:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:14,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:17:14,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:17:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:17:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:14,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 01:17:14,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:17:14,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-02 01:17:14,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-04-02 01:17:14,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-02 01:17:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:15,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:17:17,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-04-02 01:17:17,806 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-02 01:17:17,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-02 01:17:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227808724] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:17:17,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:17:17,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2023-04-02 01:17:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333280921] [2023-04-02 01:17:17,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:17:17,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:17:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:17:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:17:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1440, Unknown=1, NotChecked=0, Total=1640 [2023-04-02 01:17:17,818 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 41 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-02 01:17:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:17:30,109 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2023-04-02 01:17:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-04-02 01:17:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 33 [2023-04-02 01:17:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:17:30,111 INFO L225 Difference]: With dead ends: 146 [2023-04-02 01:17:30,111 INFO L226 Difference]: Without dead ends: 78 [2023-04-02 01:17:30,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1886, Invalid=8213, Unknown=1, NotChecked=0, Total=10100 [2023-04-02 01:17:30,115 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 212 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:17:30,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 59 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1031 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 01:17:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-02 01:17:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2023-04-02 01:17:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:17:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-04-02 01:17:30,130 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 33 [2023-04-02 01:17:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:17:30,130 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-04-02 01:17:30,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-02 01:17:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-04-02 01:17:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 01:17:30,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:17:30,131 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:17:30,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:17:30,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:30,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:17:30,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:17:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1751593745, now seen corresponding path program 2 times [2023-04-02 01:17:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:17:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16705660] [2023-04-02 01:17:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:17:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:17:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:17:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:17:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:17:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:17:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:34,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:17:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16705660] [2023-04-02 01:17:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16705660] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:17:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138687684] [2023-04-02 01:17:34,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:17:34,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:17:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:17:34,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:17:34,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:17:34,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:17:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:17:34,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 01:17:34,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:17:34,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-02 01:17:34,203 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-02 01:17:34,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-04-02 01:17:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:35,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:17:37,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-04-02 01:17:37,145 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-02 01:17:37,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-02 01:17:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:17:37,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138687684] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:17:37,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:17:37,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 13] total 43 [2023-04-02 01:17:37,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137596934] [2023-04-02 01:17:37,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:17:37,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:17:37,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:17:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:17:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:17:37,156 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 43 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-02 01:17:43,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 01:18:02,708 WARN L223 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 200 DAG size of output: 144 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:18:04,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 01:18:07,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 01:18:38,842 WARN L223 SmtUtils]: Spent 10.40s on a formula simplification. DAG size of input: 213 DAG size of output: 207 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:18:44,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 01:19:48,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 01:20:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:02,452 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2023-04-02 01:20:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 01:20:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2023-04-02 01:20:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:02,454 INFO L225 Difference]: With dead ends: 109 [2023-04-02 01:20:02,454 INFO L226 Difference]: Without dead ends: 97 [2023-04-02 01:20:02,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 131.6s TimeCoverageRelationStatistics Valid=1194, Invalid=6665, Unknown=151, NotChecked=0, Total=8010 [2023-04-02 01:20:02,456 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 337 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:02,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 55 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1605 Invalid, 3 Unknown, 0 Unchecked, 17.0s Time] [2023-04-02 01:20:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-02 01:20:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2023-04-02 01:20:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:20:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-04-02 01:20:02,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 37 [2023-04-02 01:20:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:02,477 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-04-02 01:20:02,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-02 01:20:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-04-02 01:20:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:20:02,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:02,478 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:02,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:02,681 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:02,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -698499449, now seen corresponding path program 3 times [2023-04-02 01:20:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:02,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137972321] [2023-04-02 01:20:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:02,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:03,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:03,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:20:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:20:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:06,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:06,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137972321] [2023-04-02 01:20:06,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137972321] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:06,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074454318] [2023-04-02 01:20:06,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:20:06,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:06,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:06,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:06,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:20:06,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 01:20:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:06,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:20:06,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:06,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-02 01:20:06,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-04-02 01:20:06,625 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-02 01:20:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:08,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:12,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-04-02 01:20:12,992 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-02 01:20:12,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-02 01:20:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074454318] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:13,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 16] total 51 [2023-04-02 01:20:13,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183620586] [2023-04-02 01:20:13,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 01:20:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 01:20:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2309, Unknown=1, NotChecked=0, Total=2550 [2023-04-02 01:20:13,003 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 51 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 9 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 01:20:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:20:23,805 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2023-04-02 01:20:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-02 01:20:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 9 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 41 [2023-04-02 01:20:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:20:23,806 INFO L225 Difference]: With dead ends: 176 [2023-04-02 01:20:23,806 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 01:20:23,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1174, Invalid=7197, Unknown=1, NotChecked=0, Total=8372 [2023-04-02 01:20:23,808 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 347 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:20:23,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 95 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 01:20:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 01:20:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2023-04-02 01:20:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:20:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2023-04-02 01:20:23,825 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 41 [2023-04-02 01:20:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:20:23,825 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2023-04-02 01:20:23,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 9 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 01:20:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2023-04-02 01:20:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:20:23,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:20:23,826 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:20:23,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:20:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:24,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:20:24,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:20:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1604330527, now seen corresponding path program 4 times [2023-04-02 01:20:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:20:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324549717] [2023-04-02 01:20:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:20:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:20:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:24,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:20:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:20:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-04-02 01:20:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:20:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:20:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324549717] [2023-04-02 01:20:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324549717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:20:28,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908169114] [2023-04-02 01:20:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:20:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:20:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:20:28,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:20:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:20:28,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:20:28,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:20:28,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-02 01:20:28,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:20:28,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-02 01:20:28,571 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-02 01:20:28,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-04-02 01:20:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:30,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:20:38,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-04-02 01:20:38,740 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-02 01:20:38,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-02 01:20:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:20:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908169114] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:20:38,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:20:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 58 [2023-04-02 01:20:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648650025] [2023-04-02 01:20:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:20:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-02 01:20:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:20:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-02 01:20:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3038, Unknown=1, NotChecked=0, Total=3306 [2023-04-02 01:20:38,752 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 58 states, 55 states have (on average 1.8) internal successors, (99), 55 states have internal predecessors, (99), 8 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8)